More strict boolean checks
[e-mobility-charging-stations-simulator.git] / src / charging-station / ChargingStation.ts
index ba5dc1a6a8c419a7a9c3f3628f60dd95430a242e..7b98ed35858bd4c524cccb1af9222c0100e3922b 100644 (file)
@@ -1,6 +1,43 @@
 // Partial Copyright Jerome Benoit. 2021. All Rights Reserved.
 
-import { ACElectricUtils, DCElectricUtils } from '../utils/ElectricUtils';
+import crypto from 'crypto';
+import fs from 'fs';
+import path from 'path';
+import { URL } from 'url';
+import { parentPort } from 'worker_threads';
+
+import WebSocket, { Data, RawData } from 'ws';
+
+import BaseError from '../exception/BaseError';
+import OCPPError from '../exception/OCPPError';
+import PerformanceStatistics from '../performance/PerformanceStatistics';
+import type { AutomaticTransactionGeneratorConfiguration } from '../types/AutomaticTransactionGenerator';
+import type { ChargingStationConfiguration } from '../types/ChargingStationConfiguration';
+import type { ChargingStationInfo } from '../types/ChargingStationInfo';
+import type { ChargingStationOcppConfiguration } from '../types/ChargingStationOcppConfiguration';
+import {
+  type ChargingStationTemplate,
+  CurrentType,
+  PowerUnits,
+  type WsOptions,
+} from '../types/ChargingStationTemplate';
+import { SupervisionUrlDistribution } from '../types/ConfigurationData';
+import type { ConnectorStatus } from '../types/ConnectorStatus';
+import { FileType } from '../types/FileType';
+import type { JsonType } from '../types/JsonType';
+import { ChargePointErrorCode } from '../types/ocpp/ChargePointErrorCode';
+import { ChargePointStatus } from '../types/ocpp/ChargePointStatus';
+import { ChargingProfile, ChargingRateUnitType } from '../types/ocpp/ChargingProfile';
+import {
+  ConnectorPhaseRotation,
+  StandardParametersKey,
+  SupportedFeatureProfiles,
+  VendorDefaultParametersKey,
+} from '../types/ocpp/Configuration';
+import { ErrorType } from '../types/ocpp/ErrorType';
+import { MessageType } from '../types/ocpp/MessageType';
+import { MeterValue, MeterValueMeasurand } from '../types/ocpp/MeterValues';
+import { OCPPVersion } from '../types/ocpp/OCPPVersion';
 import {
   AvailabilityType,
   BootNotificationRequest,
@@ -21,134 +58,111 @@ import {
   Response,
   StatusNotificationResponse,
 } from '../types/ocpp/Responses';
-import {
-  ChargingProfile,
-  ChargingRateUnitType,
-  ChargingSchedulePeriod,
-} from '../types/ocpp/ChargingProfile';
-import ChargingStationConfiguration, { Section } from '../types/ChargingStationConfiguration';
-import ChargingStationOcppConfiguration, {
-  ConfigurationKey,
-} from '../types/ChargingStationOcppConfiguration';
-import ChargingStationTemplate, {
-  AmpereUnits,
-  CurrentType,
-  PowerUnits,
-  Voltage,
-  WsOptions,
-} from '../types/ChargingStationTemplate';
-import {
-  ConnectorPhaseRotation,
-  StandardParametersKey,
-  SupportedFeatureProfiles,
-  VendorDefaultParametersKey,
-} from '../types/ocpp/Configuration';
-import { MeterValue, MeterValueMeasurand, MeterValuePhase } from '../types/ocpp/MeterValues';
 import {
   StopTransactionReason,
   StopTransactionRequest,
   StopTransactionResponse,
 } from '../types/ocpp/Transaction';
 import { WSError, WebSocketCloseEventStatusCode } from '../types/WebSocket';
-import WebSocket, { Data, OPEN, RawData } from 'ws';
-
-import AutomaticTransactionGenerator from './AutomaticTransactionGenerator';
-import BaseError from '../exception/BaseError';
-import { ChargePointErrorCode } from '../types/ocpp/ChargePointErrorCode';
-import { ChargePointStatus } from '../types/ocpp/ChargePointStatus';
-import ChargingStationInfo from '../types/ChargingStationInfo';
-import { ChargingStationWorkerMessageEvents } from '../types/ChargingStationWorker';
 import Configuration from '../utils/Configuration';
-import { ConnectorStatus } from '../types/ConnectorStatus';
 import Constants from '../utils/Constants';
-import { ErrorType } from '../types/ocpp/ErrorType';
-import { FileType } from '../types/FileType';
+import { ACElectricUtils, DCElectricUtils } from '../utils/ElectricUtils';
 import FileUtils from '../utils/FileUtils';
-import { JsonType } from '../types/JsonType';
-import { MessageType } from '../types/ocpp/MessageType';
+import logger from '../utils/Logger';
+import Utils from '../utils/Utils';
+import AuthorizedTagsCache from './AuthorizedTagsCache';
+import AutomaticTransactionGenerator from './AutomaticTransactionGenerator';
+import { ChargingStationConfigurationUtils } from './ChargingStationConfigurationUtils';
+import { ChargingStationUtils } from './ChargingStationUtils';
+import ChargingStationWorkerBroadcastChannel from './ChargingStationWorkerBroadcastChannel';
+import { MessageChannelUtils } from './MessageChannelUtils';
 import OCPP16IncomingRequestService from './ocpp/1.6/OCPP16IncomingRequestService';
 import OCPP16RequestService from './ocpp/1.6/OCPP16RequestService';
 import OCPP16ResponseService from './ocpp/1.6/OCPP16ResponseService';
 import { OCPP16ServiceUtils } from './ocpp/1.6/OCPP16ServiceUtils';
-import OCPPError from '../exception/OCPPError';
-import OCPPIncomingRequestService from './ocpp/OCPPIncomingRequestService';
-import OCPPRequestService from './ocpp/OCPPRequestService';
-import { OCPPVersion } from '../types/ocpp/OCPPVersion';
-import PerformanceStatistics from '../performance/PerformanceStatistics';
-import { SampledValueTemplate } from '../types/MeasurandPerPhaseSampledValueTemplates';
-import { SupervisionUrlDistribution } from '../types/ConfigurationData';
-import { URL } from 'url';
-import Utils from '../utils/Utils';
-import crypto from 'crypto';
-import fs from 'fs';
-import logger from '../utils/Logger';
-import { parentPort } from 'worker_threads';
-import path from 'path';
+import type OCPPIncomingRequestService from './ocpp/OCPPIncomingRequestService';
+import type OCPPRequestService from './ocpp/OCPPRequestService';
+import SharedLRUCache from './SharedLRUCache';
 
 export default class ChargingStation {
-  public hashId!: string;
+  public readonly index: number;
   public readonly templateFile: string;
-  public authorizedTags: string[];
   public stationInfo!: ChargingStationInfo;
-  public readonly connectors: Map<number, ConnectorStatus>;
+  public started: boolean;
+  public authorizedTagsCache: AuthorizedTagsCache;
+  public automaticTransactionGenerator!: AutomaticTransactionGenerator;
   public ocppConfiguration!: ChargingStationOcppConfiguration;
   public wsConnection!: WebSocket;
+  public readonly connectors: Map<number, ConnectorStatus>;
   public readonly requests: Map<string, CachedRequest>;
   public performanceStatistics!: PerformanceStatistics;
   public heartbeatSetInterval!: NodeJS.Timeout;
   public ocppRequestService!: OCPPRequestService;
+  public bootNotificationRequest!: BootNotificationRequest;
   public bootNotificationResponse!: BootNotificationResponse | null;
-  private readonly index: number;
+  public powerDivider!: number;
+  private starting: boolean;
+  private stopping: boolean;
   private configurationFile!: string;
-  private bootNotificationRequest!: BootNotificationRequest;
+  private configurationFileHash!: string;
   private connectorsConfigurationHash!: string;
   private ocppIncomingRequestService!: OCPPIncomingRequestService;
   private readonly messageBuffer: Set<string>;
-  private wsConfiguredConnectionUrl!: URL;
+  private configuredSupervisionUrl!: URL;
+  private configuredSupervisionUrlIndex!: number;
   private wsConnectionRestarted: boolean;
-  private stopped: boolean;
   private autoReconnectRetryCount: number;
-  private automaticTransactionGenerator!: AutomaticTransactionGenerator;
+  private templateFileWatcher!: fs.FSWatcher;
+  private readonly sharedLRUCache: SharedLRUCache;
   private webSocketPingSetInterval!: NodeJS.Timeout;
+  private readonly chargingStationWorkerBroadcastChannel: ChargingStationWorkerBroadcastChannel;
 
   constructor(index: number, templateFile: string) {
-    this.index = index;
-    this.templateFile = templateFile;
-    this.stopped = false;
+    this.started = false;
+    this.starting = false;
+    this.stopping = false;
     this.wsConnectionRestarted = false;
     this.autoReconnectRetryCount = 0;
+    this.index = index;
+    this.templateFile = templateFile;
     this.connectors = new Map<number, ConnectorStatus>();
     this.requests = new Map<string, CachedRequest>();
     this.messageBuffer = new Set<string>();
+    this.sharedLRUCache = SharedLRUCache.getInstance();
+    this.authorizedTagsCache = AuthorizedTagsCache.getInstance();
+    this.chargingStationWorkerBroadcastChannel = new ChargingStationWorkerBroadcastChannel(this);
+
     this.initialize();
-    this.authorizedTags = this.getAuthorizedTags();
   }
 
   private get wsConnectionUrl(): URL {
-    return this.getSupervisionUrlOcppConfiguration()
-      ? new URL(
-          this.getConfigurationKey(this.getSupervisionUrlOcppKey()).value +
-            '/' +
-            this.stationInfo.chargingStationId
-        )
-      : this.wsConfiguredConnectionUrl;
+    return new URL(
+      (this.getSupervisionUrlOcppConfiguration()
+        ? ChargingStationConfigurationUtils.getConfigurationKey(
+            this,
+            this.getSupervisionUrlOcppKey()
+          ).value
+        : this.configuredSupervisionUrl.href) +
+        '/' +
+        this.stationInfo.chargingStationId
+    );
   }
 
   public logPrefix(): string {
-    return Utils.logPrefix(` ${this.stationInfo.chargingStationId} |`);
-  }
-
-  public getBootNotificationRequest(): BootNotificationRequest {
-    return this.bootNotificationRequest;
-  }
-
-  public getRandomIdTag(): string {
-    const index = Math.floor(Utils.secureRandom() * this.authorizedTags.length);
-    return this.authorizedTags[index];
+    return Utils.logPrefix(
+      ` ${
+        this?.stationInfo?.chargingStationId ??
+        ChargingStationUtils.getChargingStationId(this.index, this.getTemplateFromFile())
+      } |`
+    );
   }
 
   public hasAuthorizedTags(): boolean {
-    return !Utils.isEmptyArray(this.authorizedTags);
+    return !Utils.isEmptyArray(
+      this.authorizedTagsCache.getAuthorizedTags(
+        ChargingStationUtils.getAuthorizationFile(this.stationInfo)
+      )
+    );
   }
 
   public getEnableStatistics(): boolean | undefined {
@@ -157,15 +171,20 @@ export default class ChargingStation {
       : true;
   }
 
-  public getMayAuthorizeAtRemoteStart(): boolean | undefined {
-    return this.stationInfo.mayAuthorizeAtRemoteStart ?? true;
+  public getMustAuthorizeAtRemoteStart(): boolean | undefined {
+    return this.stationInfo.mustAuthorizeAtRemoteStart ?? true;
+  }
+
+  public getPayloadSchemaValidation(): boolean | undefined {
+    return this.stationInfo.payloadSchemaValidation ?? true;
   }
 
-  public getNumberOfPhases(): number | undefined {
-    switch (this.getCurrentOutType()) {
+  public getNumberOfPhases(stationInfo?: ChargingStationInfo): number | undefined {
+    const localStationInfo: ChargingStationInfo = stationInfo ?? this.stationInfo;
+    switch (this.getCurrentOutType(stationInfo)) {
       case CurrentType.AC:
-        return !Utils.isUndefined(this.stationInfo.numberOfPhases)
-          ? this.stationInfo.numberOfPhases
+        return !Utils.isUndefined(localStationInfo.numberOfPhases)
+          ? localStationInfo.numberOfPhases
           : 3;
       case CurrentType.DC:
         return 0;
@@ -173,7 +192,7 @@ export default class ChargingStation {
   }
 
   public isWebSocketConnectionOpened(): boolean {
-    return this?.wsConnection?.readyState === OPEN;
+    return this?.wsConnection?.readyState === WebSocket.OPEN;
   }
 
   public getRegistrationStatus(): RegistrationStatus {
@@ -197,7 +216,10 @@ export default class ChargingStation {
   }
 
   public isRegistered(): boolean {
-    return !this.isInUnknownState() && (this.isInAcceptedState() || this.isInPendingState());
+    return (
+      this.isInUnknownState() === false &&
+      (this.isInAcceptedState() === true || this.isInPendingState() === true)
+    );
   }
 
   public isChargingStationAvailable(): boolean {
@@ -212,36 +234,27 @@ export default class ChargingStation {
     return this.connectors.get(0) ? this.connectors.size - 1 : this.connectors.size;
   }
 
-  public getConnectorStatus(id: number): ConnectorStatus {
+  public getConnectorStatus(id: number): ConnectorStatus | undefined {
     return this.connectors.get(id);
   }
 
-  public getCurrentOutType(): CurrentType | undefined {
-    return this.stationInfo.currentOutType ?? CurrentType.AC;
+  public getCurrentOutType(stationInfo?: ChargingStationInfo): CurrentType {
+    return (stationInfo ?? this.stationInfo).currentOutType ?? CurrentType.AC;
   }
 
   public getOcppStrictCompliance(): boolean {
-    return this.stationInfo.ocppStrictCompliance ?? false;
+    return this.stationInfo?.ocppStrictCompliance ?? false;
   }
 
-  public getVoltageOut(): number | undefined {
-    const errMsg = `${this.logPrefix()} Unknown ${this.getCurrentOutType()} currentOutType in template file ${
-      this.templateFile
-    }, cannot define default voltage out`;
-    let defaultVoltageOut: number;
-    switch (this.getCurrentOutType()) {
-      case CurrentType.AC:
-        defaultVoltageOut = Voltage.VOLTAGE_230;
-        break;
-      case CurrentType.DC:
-        defaultVoltageOut = Voltage.VOLTAGE_400;
-        break;
-      default:
-        logger.error(errMsg);
-        throw new Error(errMsg);
-    }
-    return !Utils.isUndefined(this.stationInfo.voltageOut)
-      ? this.stationInfo.voltageOut
+  public getVoltageOut(stationInfo?: ChargingStationInfo): number | undefined {
+    const defaultVoltageOut = ChargingStationUtils.getDefaultVoltageOut(
+      this.getCurrentOutType(stationInfo),
+      this.templateFile,
+      this.logPrefix()
+    );
+    const localStationInfo: ChargingStationInfo = stationInfo ?? this.stationInfo;
+    return !Utils.isUndefined(localStationInfo.voltageOut)
+      ? localStationInfo.voltageOut
       : defaultVoltageOut;
   }
 
@@ -259,9 +272,9 @@ export default class ChargingStation {
               this.getAmperageLimitation() * this.getNumberOfConnectors()
             )
           : DCElectricUtils.power(this.getVoltageOut(), this.getAmperageLimitation())) /
-        this.stationInfo.powerDivider;
+        this.powerDivider;
     }
-    const connectorMaximumPower = this.getMaximumPower() / this.stationInfo.powerDivider;
+    const connectorMaximumPower = this.getMaximumPower() / this.powerDivider;
     const connectorChargingProfilePowerLimit = this.getChargingProfilePowerLimit(connectorId);
     return Math.min(
       isNaN(connectorMaximumPower) ? Infinity : connectorMaximumPower,
@@ -281,27 +294,31 @@ export default class ChargingStation {
   }
 
   public getOutOfOrderEndMeterValues(): boolean {
-    return this.stationInfo.outOfOrderEndMeterValues ?? false;
+    return this.stationInfo?.outOfOrderEndMeterValues ?? false;
   }
 
   public getBeginEndMeterValues(): boolean {
-    return this.stationInfo.beginEndMeterValues ?? false;
+    return this.stationInfo?.beginEndMeterValues ?? false;
   }
 
   public getMeteringPerTransaction(): boolean {
-    return this.stationInfo.meteringPerTransaction ?? true;
+    return this.stationInfo?.meteringPerTransaction ?? true;
   }
 
   public getTransactionDataMeterValues(): boolean {
-    return this.stationInfo.transactionDataMeterValues ?? false;
+    return this.stationInfo?.transactionDataMeterValues ?? false;
   }
 
   public getMainVoltageMeterValues(): boolean {
-    return this.stationInfo.mainVoltageMeterValues ?? true;
+    return this.stationInfo?.mainVoltageMeterValues ?? true;
   }
 
   public getPhaseLineToLineVoltageMeterValues(): boolean {
-    return this.stationInfo.phaseLineToLineVoltageMeterValues ?? false;
+    return this.stationInfo?.phaseLineToLineVoltageMeterValues ?? false;
+  }
+
+  public getCustomValueLimitationMeterValues(): boolean {
+    return this.stationInfo?.customValueLimitationMeterValues ?? true;
   }
 
   public getConnectorIdByTransactionId(transactionId: number): number | undefined {
@@ -315,26 +332,23 @@ export default class ChargingStation {
     }
   }
 
-  public getEnergyActiveImportRegisterByTransactionId(transactionId: number): number | undefined {
-    const transactionConnectorStatus = this.getConnectorStatus(
-      this.getConnectorIdByTransactionId(transactionId)
+  public getEnergyActiveImportRegisterByTransactionId(
+    transactionId: number,
+    meterStop = false
+  ): number {
+    return this.getEnergyActiveImportRegister(
+      this.getConnectorStatus(this.getConnectorIdByTransactionId(transactionId)),
+      meterStop
     );
-    if (this.getMeteringPerTransaction()) {
-      return transactionConnectorStatus?.transactionEnergyActiveImportRegisterValue;
-    }
-    return transactionConnectorStatus?.energyActiveImportRegisterValue;
   }
 
-  public getEnergyActiveImportRegisterByConnectorId(connectorId: number): number | undefined {
-    const connectorStatus = this.getConnectorStatus(connectorId);
-    if (this.getMeteringPerTransaction()) {
-      return connectorStatus?.transactionEnergyActiveImportRegisterValue;
-    }
-    return connectorStatus?.energyActiveImportRegisterValue;
+  public getEnergyActiveImportRegisterByConnectorId(connectorId: number): number {
+    return this.getEnergyActiveImportRegister(this.getConnectorStatus(connectorId));
   }
 
   public getAuthorizeRemoteTxRequests(): boolean {
-    const authorizeRemoteTxRequests = this.getConfigurationKey(
+    const authorizeRemoteTxRequests = ChargingStationConfigurationUtils.getConfigurationKey(
+      this,
       StandardParametersKey.AuthorizeRemoteTxRequests
     );
     return authorizeRemoteTxRequests
@@ -343,100 +357,13 @@ export default class ChargingStation {
   }
 
   public getLocalAuthListEnabled(): boolean {
-    const localAuthListEnabled = this.getConfigurationKey(
+    const localAuthListEnabled = ChargingStationConfigurationUtils.getConfigurationKey(
+      this,
       StandardParametersKey.LocalAuthListEnabled
     );
     return localAuthListEnabled ? Utils.convertToBoolean(localAuthListEnabled.value) : false;
   }
 
-  public restartWebSocketPing(): void {
-    // Stop WebSocket ping
-    this.stopWebSocketPing();
-    // Start WebSocket ping
-    this.startWebSocketPing();
-  }
-
-  public getSampledValueTemplate(
-    connectorId: number,
-    measurand: MeterValueMeasurand = MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER,
-    phase?: MeterValuePhase
-  ): SampledValueTemplate | undefined {
-    const onPhaseStr = phase ? `on phase ${phase} ` : '';
-    if (!Constants.SUPPORTED_MEASURANDS.includes(measurand)) {
-      logger.warn(
-        `${this.logPrefix()} Trying to get unsupported MeterValues measurand '${measurand}' ${onPhaseStr}in template on connectorId ${connectorId}`
-      );
-      return;
-    }
-    if (
-      measurand !== MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER &&
-      !this.getConfigurationKey(StandardParametersKey.MeterValuesSampledData)?.value.includes(
-        measurand
-      )
-    ) {
-      logger.debug(
-        `${this.logPrefix()} Trying to get MeterValues measurand '${measurand}' ${onPhaseStr}in template on connectorId ${connectorId} not found in '${
-          StandardParametersKey.MeterValuesSampledData
-        }' OCPP parameter`
-      );
-      return;
-    }
-    const sampledValueTemplates: SampledValueTemplate[] =
-      this.getConnectorStatus(connectorId).MeterValues;
-    for (
-      let index = 0;
-      !Utils.isEmptyArray(sampledValueTemplates) && index < sampledValueTemplates.length;
-      index++
-    ) {
-      if (
-        !Constants.SUPPORTED_MEASURANDS.includes(
-          sampledValueTemplates[index]?.measurand ??
-            MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER
-        )
-      ) {
-        logger.warn(
-          `${this.logPrefix()} Unsupported MeterValues measurand '${measurand}' ${onPhaseStr}in template on connectorId ${connectorId}`
-        );
-      } else if (
-        phase &&
-        sampledValueTemplates[index]?.phase === phase &&
-        sampledValueTemplates[index]?.measurand === measurand &&
-        this.getConfigurationKey(StandardParametersKey.MeterValuesSampledData)?.value.includes(
-          measurand
-        )
-      ) {
-        return sampledValueTemplates[index];
-      } else if (
-        !phase &&
-        !sampledValueTemplates[index].phase &&
-        sampledValueTemplates[index]?.measurand === measurand &&
-        this.getConfigurationKey(StandardParametersKey.MeterValuesSampledData)?.value.includes(
-          measurand
-        )
-      ) {
-        return sampledValueTemplates[index];
-      } else if (
-        measurand === MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER &&
-        (!sampledValueTemplates[index].measurand ||
-          sampledValueTemplates[index].measurand === measurand)
-      ) {
-        return sampledValueTemplates[index];
-      }
-    }
-    if (measurand === MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER) {
-      const errorMsg = `${this.logPrefix()} Missing MeterValues for default measurand '${measurand}' in template on connectorId ${connectorId}`;
-      logger.error(errorMsg);
-      throw new Error(errorMsg);
-    }
-    logger.debug(
-      `${this.logPrefix()} No MeterValues for measurand '${measurand}' ${onPhaseStr}in template on connectorId ${connectorId}`
-    );
-  }
-
-  public getAutomaticTransactionGeneratorRequireAuthorize(): boolean {
-    return this.stationInfo.AutomaticTransactionGenerator.requireAuthorize ?? true;
-  }
-
   public startHeartbeat(): void {
     if (
       this.getHeartbeatInterval() &&
@@ -446,6 +373,7 @@ export default class ChargingStation {
       // eslint-disable-next-line @typescript-eslint/no-misused-promises
       this.heartbeatSetInterval = setInterval(async (): Promise<void> => {
         await this.ocppRequestService.requestHandler<HeartbeatRequest, HeartbeatResponse>(
+          this,
           RequestCommand.HEARTBEAT
         );
       }, this.getHeartbeatInterval());
@@ -478,6 +406,13 @@ export default class ChargingStation {
     this.startHeartbeat();
   }
 
+  public restartWebSocketPing(): void {
+    // Stop WebSocket ping
+    this.stopWebSocketPing();
+    // Start WebSocket ping
+    this.startWebSocketPing();
+  }
+
   public startMeterValues(connectorId: number, interval: number): void {
     if (connectorId === 0) {
       logger.error(
@@ -491,13 +426,13 @@ export default class ChargingStation {
       );
       return;
     }
-    if (!this.getConnectorStatus(connectorId)?.transactionStarted) {
+    if (this.getConnectorStatus(connectorId)?.transactionStarted === false) {
       logger.error(
         `${this.logPrefix()} Trying to start MeterValues on connector Id ${connectorId} with no transaction started`
       );
       return;
     } else if (
-      this.getConnectorStatus(connectorId)?.transactionStarted &&
+      this.getConnectorStatus(connectorId)?.transactionStarted === true &&
       !this.getConnectorStatus(connectorId)?.transactionId
     ) {
       logger.error(
@@ -518,6 +453,7 @@ export default class ChargingStation {
             interval
           );
           await this.ocppRequestService.requestHandler<MeterValuesRequest, MeterValuesResponse>(
+            this,
             RequestCommand.METER_VALUES,
             {
               connectorId,
@@ -540,10 +476,171 @@ export default class ChargingStation {
   }
 
   public start(): void {
-    if (this.getEnableStatistics()) {
-      this.performanceStatistics.start();
+    if (this.started === false) {
+      if (this.starting === false) {
+        this.starting = true;
+        if (this.getEnableStatistics()) {
+          this.performanceStatistics.start();
+        }
+        this.openWSConnection();
+        // Monitor charging station template file
+        this.templateFileWatcher = FileUtils.watchJsonFile(
+          this.logPrefix(),
+          FileType.ChargingStationTemplate,
+          this.templateFile,
+          null,
+          (event, filename): void => {
+            if (filename && event === 'change') {
+              try {
+                logger.debug(
+                  `${this.logPrefix()} ${FileType.ChargingStationTemplate} ${
+                    this.templateFile
+                  } file have changed, reload`
+                );
+                this.sharedLRUCache.deleteChargingStationTemplate(this.stationInfo?.templateHash);
+                // Initialize
+                this.initialize();
+                // Restart the ATG
+                this.stopAutomaticTransactionGenerator();
+                if (
+                  this.getAutomaticTransactionGeneratorConfigurationFromTemplate()?.enable === true
+                ) {
+                  this.startAutomaticTransactionGenerator();
+                }
+                if (this.getEnableStatistics()) {
+                  this.performanceStatistics.restart();
+                } else {
+                  this.performanceStatistics.stop();
+                }
+                // FIXME?: restart heartbeat and WebSocket ping when their interval values have changed
+              } catch (error) {
+                logger.error(
+                  `${this.logPrefix()} ${FileType.ChargingStationTemplate} file monitoring error:`,
+                  error
+                );
+              }
+            }
+          }
+        );
+        this.started = true;
+        parentPort.postMessage(MessageChannelUtils.buildStartedMessage(this));
+        this.starting = false;
+      } else {
+        logger.warn(`${this.logPrefix()} Charging station is already starting...`);
+      }
+    } else {
+      logger.warn(`${this.logPrefix()} Charging station is already started...`);
+    }
+  }
+
+  public async stop(reason?: StopTransactionReason): Promise<void> {
+    if (this.started === true) {
+      if (this.stopping === false) {
+        this.stopping = true;
+        await this.stopMessageSequence(reason);
+        this.closeWSConnection();
+        if (this.getEnableStatistics()) {
+          this.performanceStatistics.stop();
+        }
+        this.sharedLRUCache.deleteChargingStationConfiguration(this.configurationFileHash);
+        this.templateFileWatcher.close();
+        this.sharedLRUCache.deleteChargingStationTemplate(this.stationInfo?.templateHash);
+        this.bootNotificationResponse = null;
+        this.started = false;
+        parentPort.postMessage(MessageChannelUtils.buildStoppedMessage(this));
+        this.stopping = false;
+      } else {
+        logger.warn(`${this.logPrefix()} Charging station is already stopping...`);
+      }
+    } else {
+      logger.warn(`${this.logPrefix()} Charging station is already stopped...`);
+    }
+  }
+
+  public async reset(reason?: StopTransactionReason): Promise<void> {
+    await this.stop(reason);
+    await Utils.sleep(this.stationInfo.resetTime);
+    this.initialize();
+    this.start();
+  }
+
+  public saveOcppConfiguration(): void {
+    if (this.getOcppPersistentConfiguration()) {
+      this.saveConfiguration();
+    }
+  }
+
+  public resetConnectorStatus(connectorId: number): void {
+    this.getConnectorStatus(connectorId).idTagLocalAuthorized = false;
+    this.getConnectorStatus(connectorId).idTagAuthorized = false;
+    this.getConnectorStatus(connectorId).transactionRemoteStarted = false;
+    this.getConnectorStatus(connectorId).transactionStarted = false;
+    delete this.getConnectorStatus(connectorId).localAuthorizeIdTag;
+    delete this.getConnectorStatus(connectorId).authorizeIdTag;
+    delete this.getConnectorStatus(connectorId).transactionId;
+    delete this.getConnectorStatus(connectorId).transactionIdTag;
+    this.getConnectorStatus(connectorId).transactionEnergyActiveImportRegisterValue = 0;
+    delete this.getConnectorStatus(connectorId).transactionBeginMeterValue;
+    this.stopMeterValues(connectorId);
+    parentPort.postMessage(MessageChannelUtils.buildUpdatedMessage(this));
+  }
+
+  public hasFeatureProfile(featureProfile: SupportedFeatureProfiles): boolean {
+    return ChargingStationConfigurationUtils.getConfigurationKey(
+      this,
+      StandardParametersKey.SupportedFeatureProfiles
+    )?.value.includes(featureProfile);
+  }
+
+  public bufferMessage(message: string): void {
+    this.messageBuffer.add(message);
+  }
+
+  public openWSConnection(
+    options: WsOptions = this.stationInfo?.wsOptions ?? {},
+    params: { closeOpened?: boolean; terminateOpened?: boolean } = {
+      closeOpened: false,
+      terminateOpened: false,
+    }
+  ): void {
+    options.handshakeTimeout = options?.handshakeTimeout ?? this.getConnectionTimeout() * 1000;
+    params.closeOpened = params?.closeOpened ?? false;
+    params.terminateOpened = params?.terminateOpened ?? false;
+    if (
+      !Utils.isNullOrUndefined(this.stationInfo.supervisionUser) &&
+      !Utils.isNullOrUndefined(this.stationInfo.supervisionPassword)
+    ) {
+      options.auth = `${this.stationInfo.supervisionUser}:${this.stationInfo.supervisionPassword}`;
+    }
+    if (params?.closeOpened) {
+      this.closeWSConnection();
     }
-    this.openWSConnection();
+    if (params?.terminateOpened) {
+      this.terminateWSConnection();
+    }
+    let protocol: string;
+    switch (this.getOcppVersion()) {
+      case OCPPVersion.VERSION_16:
+        protocol = 'ocpp' + OCPPVersion.VERSION_16;
+        break;
+      default:
+        this.handleUnsupportedVersion(this.getOcppVersion());
+        break;
+    }
+
+    if (this.isWebSocketConnectionOpened() === true) {
+      logger.warn(
+        `${this.logPrefix()} OCPP connection to URL ${this.wsConnectionUrl.toString()} is already opened`
+      );
+      return;
+    }
+
+    logger.info(
+      `${this.logPrefix()} Open OCPP connection to URL ${this.wsConnectionUrl.toString()}`
+    );
+
+    this.wsConnection = new WebSocket(this.wsConnectionUrl, protocol, options);
+
     // Handle WebSocket message
     this.wsConnection.on(
       'message',
@@ -565,296 +662,83 @@ export default class ChargingStation {
     this.wsConnection.on('ping', this.onPing.bind(this) as (this: WebSocket, data: Buffer) => void);
     // Handle WebSocket pong
     this.wsConnection.on('pong', this.onPong.bind(this) as (this: WebSocket, data: Buffer) => void);
-    // Monitor authorization file
-    FileUtils.watchJsonFile<string[]>(
-      this.logPrefix(),
-      FileType.Authorization,
-      this.getAuthorizationFile(),
-      this.authorizedTags
-    );
-    // Monitor charging station template file
-    FileUtils.watchJsonFile(
-      this.logPrefix(),
-      FileType.ChargingStationTemplate,
-      this.templateFile,
-      null,
-      (event, filename): void => {
-        if (filename && event === 'change') {
-          try {
-            logger.debug(
-              `${this.logPrefix()} ${FileType.ChargingStationTemplate} ${
-                this.templateFile
-              } file have changed, reload`
-            );
-            // Initialize
-            this.initialize();
-            // Restart the ATG
-            if (
-              !this.stationInfo.AutomaticTransactionGenerator.enable &&
-              this.automaticTransactionGenerator
-            ) {
-              this.automaticTransactionGenerator.stop();
-            }
-            this.startAutomaticTransactionGenerator();
-            if (this.getEnableStatistics()) {
-              this.performanceStatistics.restart();
-            } else {
-              this.performanceStatistics.stop();
-            }
-            // FIXME?: restart heartbeat and WebSocket ping when their interval values have changed
-          } catch (error) {
-            logger.error(
-              `${this.logPrefix()} ${FileType.ChargingStationTemplate} file monitoring error: %j`,
-              error
-            );
-          }
-        }
-      }
-    );
-    parentPort.postMessage({
-      id: ChargingStationWorkerMessageEvents.STARTED,
-      data: { id: this.stationInfo.chargingStationId },
-    });
   }
 
-  public async stop(reason: StopTransactionReason = StopTransactionReason.NONE): Promise<void> {
-    // Stop message sequence
-    await this.stopMessageSequence(reason);
-    for (const connectorId of this.connectors.keys()) {
-      if (connectorId > 0) {
-        await this.ocppRequestService.requestHandler<
-          StatusNotificationRequest,
-          StatusNotificationResponse
-        >(RequestCommand.STATUS_NOTIFICATION, {
-          connectorId,
-          status: ChargePointStatus.UNAVAILABLE,
-          errorCode: ChargePointErrorCode.NO_ERROR,
-        });
-        this.getConnectorStatus(connectorId).status = ChargePointStatus.UNAVAILABLE;
-      }
-    }
-    if (this.isWebSocketConnectionOpened()) {
+  public closeWSConnection(): void {
+    if (this.isWebSocketConnectionOpened() === true) {
       this.wsConnection.close();
+      this.wsConnection = null;
     }
-    if (this.getEnableStatistics()) {
-      this.performanceStatistics.stop();
-    }
-    this.bootNotificationResponse = null;
-    parentPort.postMessage({
-      id: ChargingStationWorkerMessageEvents.STOPPED,
-      data: { id: this.stationInfo.chargingStationId },
-    });
-    this.stopped = true;
   }
 
-  public async reset(reason?: StopTransactionReason): Promise<void> {
-    await this.stop(reason);
-    await Utils.sleep(this.stationInfo.resetTime);
-    this.stationInfo = this.getStationInfo();
-    this.stationInfo?.Connectors && delete this.stationInfo.Connectors;
-    this.start();
-  }
-
-  public getConfigurationKey(
-    key: string | StandardParametersKey,
-    caseInsensitive = false
-  ): ConfigurationKey | undefined {
-    return this.ocppConfiguration.configurationKey.find((configElement) => {
-      if (caseInsensitive) {
-        return configElement.key.toLowerCase() === key.toLowerCase();
-      }
-      return configElement.key === key;
-    });
-  }
-
-  public addConfigurationKey(
-    key: string | StandardParametersKey,
-    value: string,
-    options: { readonly?: boolean; visible?: boolean; reboot?: boolean } = {
-      readonly: false,
-      visible: true,
-      reboot: false,
-    },
-    params: { overwrite?: boolean; save?: boolean } = { overwrite: false, save: false }
+  public startAutomaticTransactionGenerator(
+    connectorIds?: number[],
+    automaticTransactionGeneratorConfiguration?: AutomaticTransactionGeneratorConfiguration
   ): void {
-    options = options ?? ({} as { readonly?: boolean; visible?: boolean; reboot?: boolean });
-    options.readonly = options?.readonly ?? false;
-    options.visible = options?.visible ?? true;
-    options.reboot = options?.reboot ?? false;
-    let keyFound = this.getConfigurationKey(key);
-    if (keyFound && params?.overwrite) {
-      this.deleteConfigurationKey(keyFound.key, { save: false });
-      keyFound = undefined;
-    }
-    if (!keyFound) {
-      this.ocppConfiguration.configurationKey.push({
-        key,
-        readonly: options.readonly,
-        value,
-        visible: options.visible,
-        reboot: options.reboot,
-      });
-      params?.save && this.saveOcppConfiguration();
+    this.automaticTransactionGenerator = AutomaticTransactionGenerator.getInstance(
+      automaticTransactionGeneratorConfiguration ??
+        this.getAutomaticTransactionGeneratorConfigurationFromTemplate(),
+      this
+    );
+    if (!Utils.isEmptyArray(connectorIds)) {
+      for (const connectorId of connectorIds) {
+        this.automaticTransactionGenerator.startConnector(connectorId);
+      }
     } else {
-      logger.error(
-        `${this.logPrefix()} Trying to add an already existing configuration key: %j`,
-        keyFound
-      );
+      this.automaticTransactionGenerator.start();
     }
+    parentPort.postMessage(MessageChannelUtils.buildUpdatedMessage(this));
   }
 
-  public setConfigurationKeyValue(
-    key: string | StandardParametersKey,
-    value: string,
-    caseInsensitive = false
-  ): void {
-    const keyFound = this.getConfigurationKey(key, caseInsensitive);
-    if (keyFound) {
-      this.ocppConfiguration.configurationKey[
-        this.ocppConfiguration.configurationKey.indexOf(keyFound)
-      ].value = value;
-      this.saveOcppConfiguration();
+  public stopAutomaticTransactionGenerator(connectorIds?: number[]): void {
+    if (!Utils.isEmptyArray(connectorIds)) {
+      for (const connectorId of connectorIds) {
+        this.automaticTransactionGenerator?.stopConnector(connectorId);
+      }
     } else {
-      logger.error(
-        `${this.logPrefix()} Trying to set a value on a non existing configuration key: %j`,
-        { key, value }
-      );
+      this.automaticTransactionGenerator?.stop();
     }
+    parentPort.postMessage(MessageChannelUtils.buildUpdatedMessage(this));
   }
 
-  public deleteConfigurationKey(
-    key: string | StandardParametersKey,
-    params: { save?: boolean; caseInsensitive?: boolean } = { save: true, caseInsensitive: false }
-  ): ConfigurationKey[] {
-    const keyFound = this.getConfigurationKey(key, params?.caseInsensitive);
-    if (keyFound) {
-      const deletedConfigurationKey = this.ocppConfiguration.configurationKey.splice(
-        this.ocppConfiguration.configurationKey.indexOf(keyFound),
-        1
-      );
-      params?.save && this.saveOcppConfiguration();
-      return deletedConfigurationKey;
-    }
-  }
-
-  public getChargingProfilePowerLimit(connectorId: number): number | undefined {
-    const timestamp = new Date().getTime();
-    let matchingChargingProfile: ChargingProfile;
-    let chargingSchedulePeriods: ChargingSchedulePeriod[] = [];
-    if (!Utils.isEmptyArray(this.getConnectorStatus(connectorId)?.chargingProfiles)) {
-      const chargingProfiles: ChargingProfile[] = this.getConnectorStatus(
-        connectorId
-      ).chargingProfiles.filter(
-        (chargingProfile) =>
-          timestamp >= chargingProfile.chargingSchedule?.startSchedule.getTime() &&
-          timestamp <
-            chargingProfile.chargingSchedule?.startSchedule.getTime() +
-              chargingProfile.chargingSchedule.duration * 1000 &&
-          chargingProfile?.stackLevel === Math.max(...chargingProfiles.map((cp) => cp?.stackLevel))
-      );
-      if (!Utils.isEmptyArray(chargingProfiles)) {
-        for (const chargingProfile of chargingProfiles) {
-          if (!Utils.isEmptyArray(chargingProfile.chargingSchedule.chargingSchedulePeriod)) {
-            chargingSchedulePeriods =
-              chargingProfile.chargingSchedule.chargingSchedulePeriod.filter(
-                (chargingSchedulePeriod, index) => {
-                  timestamp >=
-                    chargingProfile.chargingSchedule.startSchedule.getTime() +
-                      chargingSchedulePeriod.startPeriod * 1000 &&
-                    ((chargingProfile.chargingSchedule.chargingSchedulePeriod[index + 1] &&
-                      timestamp <
-                        chargingProfile.chargingSchedule.startSchedule.getTime() +
-                          chargingProfile.chargingSchedule.chargingSchedulePeriod[index + 1]
-                            ?.startPeriod *
-                            1000) ||
-                      !chargingProfile.chargingSchedule.chargingSchedulePeriod[index + 1]);
-                }
-              );
-            if (!Utils.isEmptyArray(chargingSchedulePeriods)) {
-              matchingChargingProfile = chargingProfile;
-              break;
-            }
-          }
-        }
-      }
-    }
-    let limit: number;
-    if (!Utils.isEmptyArray(chargingSchedulePeriods)) {
-      switch (this.getCurrentOutType()) {
-        case CurrentType.AC:
-          limit =
-            matchingChargingProfile.chargingSchedule.chargingRateUnit === ChargingRateUnitType.WATT
-              ? chargingSchedulePeriods[0].limit
-              : ACElectricUtils.powerTotal(
-                  this.getNumberOfPhases(),
-                  this.getVoltageOut(),
-                  chargingSchedulePeriods[0].limit
-                );
-          break;
-        case CurrentType.DC:
-          limit =
-            matchingChargingProfile.chargingSchedule.chargingRateUnit === ChargingRateUnitType.WATT
-              ? chargingSchedulePeriods[0].limit
-              : DCElectricUtils.power(this.getVoltageOut(), chargingSchedulePeriods[0].limit);
-      }
-    }
-    const connectorMaximumPower = this.getMaximumPower() / this.stationInfo.powerDivider;
-    if (limit > connectorMaximumPower) {
-      logger.error(
-        `${this.logPrefix()} Charging profile id ${
-          matchingChargingProfile.chargingProfileId
-        } limit is greater than connector id ${connectorId} maximum, dump charging profiles' stack: %j`,
-        this.getConnectorStatus(connectorId).chargingProfiles
+  public async stopTransactionOnConnector(
+    connectorId: number,
+    reason = StopTransactionReason.NONE
+  ): Promise<StopTransactionResponse> {
+    const transactionId = this.getConnectorStatus(connectorId).transactionId;
+    if (
+      this.getBeginEndMeterValues() &&
+      this.getOcppStrictCompliance() &&
+      !this.getOutOfOrderEndMeterValues()
+    ) {
+      // FIXME: Implement OCPP version agnostic helpers
+      const transactionEndMeterValue = OCPP16ServiceUtils.buildTransactionEndMeterValue(
+        this,
+        connectorId,
+        this.getEnergyActiveImportRegisterByTransactionId(transactionId)
       );
-      limit = connectorMaximumPower;
-    }
-    return limit;
-  }
-
-  public setChargingProfile(connectorId: number, cp: ChargingProfile): void {
-    let cpReplaced = false;
-    if (!Utils.isEmptyArray(this.getConnectorStatus(connectorId).chargingProfiles)) {
-      this.getConnectorStatus(connectorId).chargingProfiles?.forEach(
-        (chargingProfile: ChargingProfile, index: number) => {
-          if (
-            chargingProfile.chargingProfileId === cp.chargingProfileId ||
-            (chargingProfile.stackLevel === cp.stackLevel &&
-              chargingProfile.chargingProfilePurpose === cp.chargingProfilePurpose)
-          ) {
-            this.getConnectorStatus(connectorId).chargingProfiles[index] = cp;
-            cpReplaced = true;
-          }
+      await this.ocppRequestService.requestHandler<MeterValuesRequest, MeterValuesResponse>(
+        this,
+        RequestCommand.METER_VALUES,
+        {
+          connectorId,
+          transactionId,
+          meterValue: [transactionEndMeterValue],
         }
       );
     }
-    !cpReplaced && this.getConnectorStatus(connectorId).chargingProfiles?.push(cp);
-  }
-
-  public resetConnectorStatus(connectorId: number): void {
-    this.getConnectorStatus(connectorId).idTagLocalAuthorized = false;
-    this.getConnectorStatus(connectorId).idTagAuthorized = false;
-    this.getConnectorStatus(connectorId).transactionRemoteStarted = false;
-    this.getConnectorStatus(connectorId).transactionStarted = false;
-    delete this.getConnectorStatus(connectorId).localAuthorizeIdTag;
-    delete this.getConnectorStatus(connectorId).authorizeIdTag;
-    delete this.getConnectorStatus(connectorId).transactionId;
-    delete this.getConnectorStatus(connectorId).transactionIdTag;
-    this.getConnectorStatus(connectorId).transactionEnergyActiveImportRegisterValue = 0;
-    delete this.getConnectorStatus(connectorId).transactionBeginMeterValue;
-    this.stopMeterValues(connectorId);
-  }
-
-  public hasFeatureProfile(featureProfile: SupportedFeatureProfiles) {
-    return this.getConfigurationKey(StandardParametersKey.SupportedFeatureProfiles)?.value.includes(
-      featureProfile
+    return this.ocppRequestService.requestHandler<StopTransactionRequest, StopTransactionResponse>(
+      this,
+      RequestCommand.STOP_TRANSACTION,
+      {
+        transactionId,
+        meterStop: this.getEnergyActiveImportRegisterByTransactionId(transactionId, true),
+        reason,
+      }
     );
   }
 
-  public bufferMessage(message: string): void {
-    this.messageBuffer.add(message);
-  }
-
-  private flushMessageBuffer() {
+  private flushMessageBuffer(): void {
     if (this.messageBuffer.size > 0) {
       this.messageBuffer.forEach((message) => {
         // TODO: evaluate the need to track performance
@@ -872,46 +756,24 @@ export default class ChargingStation {
     return this.stationInfo.supervisionUrlOcppKey ?? VendorDefaultParametersKey.ConnectionUrl;
   }
 
-  private getChargingStationId(stationTemplate: ChargingStationTemplate): string {
-    // In case of multiple instances: add instance index to charging station id
-    const instanceIndex = process.env.CF_INSTANCE_INDEX ?? 0;
-    const idSuffix = stationTemplate.nameSuffix ?? '';
-    const idStr = '000000000' + this.index.toString();
-    return stationTemplate.fixedName
-      ? stationTemplate.baseName
-      : stationTemplate.baseName +
-          '-' +
-          instanceIndex.toString() +
-          idStr.substring(idStr.length - 4) +
-          idSuffix;
-  }
-
-  private getRandomSerialNumberSuffix(params?: {
-    randomBytesLength?: number;
-    upperCase?: boolean;
-  }): string {
-    const randomSerialNumberSuffix = crypto
-      .randomBytes(params?.randomBytesLength ?? 16)
-      .toString('hex');
-    if (params?.upperCase) {
-      return randomSerialNumberSuffix.toUpperCase();
-    }
-    return randomSerialNumberSuffix;
-  }
-
   private getTemplateFromFile(): ChargingStationTemplate | null {
     let template: ChargingStationTemplate = null;
     try {
-      const measureId = `${FileType.ChargingStationTemplate} read`;
-      const beginId = PerformanceStatistics.beginMeasure(measureId);
-      template =
-        (JSON.parse(fs.readFileSync(this.templateFile, 'utf8')) as ChargingStationTemplate) ??
-        ({} as ChargingStationTemplate);
-      PerformanceStatistics.endMeasure(measureId, beginId);
-      template.templateHash = crypto
-        .createHash(Constants.DEFAULT_HASH_ALGORITHM)
-        .update(JSON.stringify(template))
-        .digest('hex');
+      if (this.sharedLRUCache.hasChargingStationTemplate(this.stationInfo?.templateHash)) {
+        template = this.sharedLRUCache.getChargingStationTemplate(this.stationInfo.templateHash);
+      } else {
+        const measureId = `${FileType.ChargingStationTemplate} read`;
+        const beginId = PerformanceStatistics.beginMeasure(measureId);
+        template = JSON.parse(
+          fs.readFileSync(this.templateFile, 'utf8')
+        ) as ChargingStationTemplate;
+        PerformanceStatistics.endMeasure(measureId, beginId);
+        template.templateHash = crypto
+          .createHash(Constants.DEFAULT_HASH_ALGORITHM)
+          .update(JSON.stringify(template))
+          .digest('hex');
+        this.sharedLRUCache.setChargingStationTemplate(template);
+      }
     } catch (error) {
       FileUtils.handleFileException(
         this.logPrefix(),
@@ -923,122 +785,99 @@ export default class ChargingStation {
     return template;
   }
 
-  private createSerialNumber(
-    stationInfo: ChargingStationInfo,
-    existingStationInfo?: ChargingStationInfo,
-    params: { randomSerialNumberUpperCase?: boolean; randomSerialNumber?: boolean } = {
-      randomSerialNumberUpperCase: true,
-      randomSerialNumber: true,
-    }
-  ): void {
-    params = params ?? {};
-    params.randomSerialNumberUpperCase = params?.randomSerialNumberUpperCase ?? true;
-    params.randomSerialNumber = params?.randomSerialNumber ?? true;
-    if (!Utils.isEmptyObject(existingStationInfo)) {
-      existingStationInfo?.chargePointSerialNumber &&
-        (stationInfo.chargePointSerialNumber = existingStationInfo.chargePointSerialNumber);
-      existingStationInfo?.chargeBoxSerialNumber &&
-        (stationInfo.chargeBoxSerialNumber = existingStationInfo.chargeBoxSerialNumber);
-      existingStationInfo?.meterSerialNumber &&
-        (stationInfo.meterSerialNumber = existingStationInfo.meterSerialNumber);
-    } else {
-      const serialNumberSuffix = params?.randomSerialNumber
-        ? this.getRandomSerialNumberSuffix({ upperCase: params.randomSerialNumberUpperCase })
-        : '';
-      stationInfo.chargePointSerialNumber =
-        stationInfo?.chargePointSerialNumberPrefix &&
-        stationInfo.chargePointSerialNumberPrefix + serialNumberSuffix;
-      stationInfo.chargeBoxSerialNumber =
-        stationInfo?.chargeBoxSerialNumberPrefix &&
-        stationInfo.chargeBoxSerialNumberPrefix + serialNumberSuffix;
-      stationInfo.meterSerialNumber =
-        stationInfo?.meterSerialNumberPrefix &&
-        stationInfo.meterSerialNumberPrefix + serialNumberSuffix;
-    }
-  }
-
   private getStationInfoFromTemplate(): ChargingStationInfo {
-    const stationInfo: ChargingStationInfo = this.getTemplateFromFile();
-    if (Utils.isNullOrUndefined(stationInfo)) {
-      const logMsg = 'Failed to read charging station template file';
-      logger.error(`${this.logPrefix()} ${logMsg}`);
-      throw new BaseError(logMsg);
+    const stationTemplate: ChargingStationTemplate = this.getTemplateFromFile();
+    if (Utils.isNullOrUndefined(stationTemplate)) {
+      const errorMsg = 'Failed to read charging station template file';
+      logger.error(`${this.logPrefix()} ${errorMsg}`);
+      throw new BaseError(errorMsg);
     }
-    if (Utils.isEmptyObject(stationInfo)) {
-      logger.warn(
-        `${this.logPrefix()} Empty charging station information from template file ${
-          this.templateFile
-        }`
-      );
+    if (Utils.isEmptyObject(stationTemplate)) {
+      const errorMsg = `Empty charging station information from template file ${this.templateFile}`;
+      logger.error(`${this.logPrefix()} ${errorMsg}`);
+      throw new BaseError(errorMsg);
     }
-    const chargingStationId = this.getChargingStationId(stationInfo);
     // Deprecation template keys section
-    this.warnDeprecatedTemplateKey(
-      stationInfo,
+    ChargingStationUtils.warnDeprecatedTemplateKey(
+      stationTemplate,
       'supervisionUrl',
-      chargingStationId,
+      this.templateFile,
+      this.logPrefix(),
       "Use 'supervisionUrls' instead"
     );
-    this.convertDeprecatedTemplateKey(stationInfo, 'supervisionUrl', 'supervisionUrls');
-    stationInfo.wsOptions = stationInfo?.wsOptions ?? {};
-    if (!Utils.isEmptyArray(stationInfo.power)) {
-      stationInfo.power = stationInfo.power as number[];
-      const powerArrayRandomIndex = Math.floor(Utils.secureRandom() * stationInfo.power.length);
+    ChargingStationUtils.convertDeprecatedTemplateKey(
+      stationTemplate,
+      'supervisionUrl',
+      'supervisionUrls'
+    );
+    const stationInfo: ChargingStationInfo =
+      ChargingStationUtils.stationTemplateToStationInfo(stationTemplate);
+    stationInfo.hashId = ChargingStationUtils.getHashId(this.index, stationTemplate);
+    stationInfo.chargingStationId = ChargingStationUtils.getChargingStationId(
+      this.index,
+      stationTemplate
+    );
+    ChargingStationUtils.createSerialNumber(stationTemplate, stationInfo);
+    if (!Utils.isEmptyArray(stationTemplate.power)) {
+      stationTemplate.power = stationTemplate.power as number[];
+      const powerArrayRandomIndex = Math.floor(Utils.secureRandom() * stationTemplate.power.length);
       stationInfo.maximumPower =
-        stationInfo.powerUnit === PowerUnits.KILO_WATT
-          ? stationInfo.power[powerArrayRandomIndex] * 1000
-          : stationInfo.power[powerArrayRandomIndex];
+        stationTemplate.powerUnit === PowerUnits.KILO_WATT
+          ? stationTemplate.power[powerArrayRandomIndex] * 1000
+          : stationTemplate.power[powerArrayRandomIndex];
     } else {
-      stationInfo.power = stationInfo.power as number;
+      stationTemplate.power = stationTemplate.power as number;
       stationInfo.maximumPower =
-        stationInfo.powerUnit === PowerUnits.KILO_WATT
-          ? stationInfo.power * 1000
-          : stationInfo.power;
-    }
-    delete stationInfo.power;
-    delete stationInfo.powerUnit;
-    stationInfo.chargingStationId = chargingStationId;
-    stationInfo.resetTime = stationInfo.resetTime
-      ? stationInfo.resetTime * 1000
+        stationTemplate.powerUnit === PowerUnits.KILO_WATT
+          ? stationTemplate.power * 1000
+          : stationTemplate.power;
+    }
+    stationInfo.resetTime = stationTemplate.resetTime
+      ? stationTemplate.resetTime * 1000
       : Constants.CHARGING_STATION_DEFAULT_RESET_TIME;
-    return stationInfo;
-  }
-
-  private createStationInfoHash(stationInfo: ChargingStationInfo): ChargingStationInfo {
-    if (!Utils.isEmptyObject(stationInfo)) {
-      const previousInfoHash = stationInfo?.infoHash ?? '';
-      delete stationInfo.infoHash;
-      const currentInfoHash = crypto
-        .createHash(Constants.DEFAULT_HASH_ALGORITHM)
-        .update(JSON.stringify(stationInfo))
-        .digest('hex');
-      if (
-        Utils.isEmptyString(previousInfoHash) ||
-        (!Utils.isEmptyString(previousInfoHash) && currentInfoHash !== previousInfoHash)
-      ) {
-        stationInfo.infoHash = currentInfoHash;
-      } else {
-        stationInfo.infoHash = previousInfoHash;
-      }
+    const configuredMaxConnectors =
+      ChargingStationUtils.getConfiguredNumberOfConnectors(stationTemplate);
+    ChargingStationUtils.checkConfiguredMaxConnectors(
+      configuredMaxConnectors,
+      this.templateFile,
+      this.logPrefix()
+    );
+    const templateMaxConnectors =
+      ChargingStationUtils.getTemplateMaxNumberOfConnectors(stationTemplate);
+    ChargingStationUtils.checkTemplateMaxConnectors(
+      templateMaxConnectors,
+      this.templateFile,
+      this.logPrefix()
+    );
+    if (
+      configuredMaxConnectors >
+        (stationTemplate?.Connectors[0] ? templateMaxConnectors - 1 : templateMaxConnectors) &&
+      !stationTemplate?.randomConnectors
+    ) {
+      logger.warn(
+        `${this.logPrefix()} Number of connectors exceeds the number of connector configurations in template ${
+          this.templateFile
+        }, forcing random connector configurations affectation`
+      );
+      stationInfo.randomConnectors = true;
     }
+    // Build connectors if needed (FIXME: should be factored out)
+    this.initializeConnectors(stationInfo, configuredMaxConnectors, templateMaxConnectors);
+    stationInfo.maximumAmperage = this.getMaximumAmperage(stationInfo);
+    ChargingStationUtils.createStationInfoHash(stationInfo);
     return stationInfo;
   }
 
-  private getStationInfoFromFile(): ChargingStationInfo {
-    let stationInfo = this.getConfigurationFromFile()?.stationInfo ?? ({} as ChargingStationInfo);
-    stationInfo = this.createStationInfoHash(stationInfo);
+  private getStationInfoFromFile(): ChargingStationInfo | null {
+    let stationInfo: ChargingStationInfo = null;
+    this.getStationInfoPersistentConfiguration() &&
+      (stationInfo = this.getConfigurationFromFile()?.stationInfo ?? null);
+    stationInfo && ChargingStationUtils.createStationInfoHash(stationInfo);
     return stationInfo;
   }
 
   private getStationInfo(): ChargingStationInfo {
     const stationInfoFromTemplate: ChargingStationInfo = this.getStationInfoFromTemplate();
-    this.hashId = this.getHashId(stationInfoFromTemplate);
-    this.configurationFile = path.join(
-      path.resolve(__dirname, '../'),
-      'assets',
-      'configurations',
-      this.hashId + '.json'
-    );
     const stationInfoFromFile: ChargingStationInfo = this.getStationInfoFromFile();
     // Priority: charging station info from template > charging station info from configuration file > charging station info attribute
     if (stationInfoFromFile?.templateHash === stationInfoFromTemplate.templateHash) {
@@ -1047,196 +886,183 @@ export default class ChargingStation {
       }
       return stationInfoFromFile;
     }
-    this.createSerialNumber(stationInfoFromTemplate, stationInfoFromFile);
+    stationInfoFromFile &&
+      ChargingStationUtils.propagateSerialNumber(
+        this.getTemplateFromFile(),
+        stationInfoFromFile,
+        stationInfoFromTemplate
+      );
     return stationInfoFromTemplate;
   }
 
   private saveStationInfo(): void {
-    this.saveConfiguration(Section.stationInfo);
+    if (this.getStationInfoPersistentConfiguration()) {
+      this.saveConfiguration();
+    }
   }
 
   private getOcppVersion(): OCPPVersion {
-    return this.stationInfo.ocppVersion ? this.stationInfo.ocppVersion : OCPPVersion.VERSION_16;
+    return this.stationInfo.ocppVersion ?? OCPPVersion.VERSION_16;
   }
 
   private getOcppPersistentConfiguration(): boolean {
-    return this.stationInfo.ocppPersistentConfiguration ?? true;
+    return this.stationInfo?.ocppPersistentConfiguration ?? true;
+  }
+
+  private getStationInfoPersistentConfiguration(): boolean {
+    return this.stationInfo?.stationInfoPersistentConfiguration ?? true;
   }
 
   private handleUnsupportedVersion(version: OCPPVersion) {
-    const errMsg = `${this.logPrefix()} Unsupported protocol version '${version}' configured in template file ${
-      this.templateFile
-    }`;
-    logger.error(errMsg);
-    throw new Error(errMsg);
-  }
-
-  private createBootNotificationRequest(stationInfo: ChargingStationInfo): BootNotificationRequest {
-    return {
-      chargePointModel: stationInfo.chargePointModel,
-      chargePointVendor: stationInfo.chargePointVendor,
-      ...(!Utils.isUndefined(stationInfo.chargeBoxSerialNumber) && {
-        chargeBoxSerialNumber: stationInfo.chargeBoxSerialNumber,
-      }),
-      ...(!Utils.isUndefined(stationInfo.chargePointSerialNumber) && {
-        chargePointSerialNumber: stationInfo.chargePointSerialNumber,
-      }),
-      ...(!Utils.isUndefined(stationInfo.firmwareVersion) && {
-        firmwareVersion: stationInfo.firmwareVersion,
-      }),
-      ...(!Utils.isUndefined(stationInfo.iccid) && { iccid: stationInfo.iccid }),
-      ...(!Utils.isUndefined(stationInfo.imsi) && { imsi: stationInfo.imsi }),
-      ...(!Utils.isUndefined(stationInfo.meterSerialNumber) && {
-        meterSerialNumber: stationInfo.meterSerialNumber,
-      }),
-      ...(!Utils.isUndefined(stationInfo.meterType) && {
-        meterType: stationInfo.meterType,
-      }),
-    };
-  }
-
-  private getHashId(stationInfo: ChargingStationInfo): string {
-    const hashBootNotificationRequest = {
-      chargePointModel: stationInfo.chargePointModel,
-      chargePointVendor: stationInfo.chargePointVendor,
-      ...(!Utils.isUndefined(stationInfo.chargeBoxSerialNumberPrefix) && {
-        chargeBoxSerialNumber: stationInfo.chargeBoxSerialNumberPrefix,
-      }),
-      ...(!Utils.isUndefined(stationInfo.chargePointSerialNumberPrefix) && {
-        chargePointSerialNumber: stationInfo.chargePointSerialNumberPrefix,
-      }),
-      ...(!Utils.isUndefined(stationInfo.firmwareVersion) && {
-        firmwareVersion: stationInfo.firmwareVersion,
-      }),
-      ...(!Utils.isUndefined(stationInfo.iccid) && { iccid: stationInfo.iccid }),
-      ...(!Utils.isUndefined(stationInfo.imsi) && { imsi: stationInfo.imsi }),
-      ...(!Utils.isUndefined(stationInfo.meterSerialNumberPrefix) && {
-        meterSerialNumber: stationInfo.meterSerialNumberPrefix,
-      }),
-      ...(!Utils.isUndefined(stationInfo.meterType) && {
-        meterType: stationInfo.meterType,
-      }),
-    };
-    return crypto
-      .createHash(Constants.DEFAULT_HASH_ALGORITHM)
-      .update(JSON.stringify(hashBootNotificationRequest) + stationInfo.chargingStationId)
-      .digest('hex');
+    const errMsg = `Unsupported protocol version '${version}' configured in template file ${this.templateFile}`;
+    logger.error(`${this.logPrefix()} ${errMsg}`);
+    throw new BaseError(errMsg);
   }
 
   private initialize(): void {
-    this.stationInfo = this.getStationInfo();
-    logger.info(`${this.logPrefix()} Charging station hashId '${this.hashId}'`);
-    this.bootNotificationRequest = this.createBootNotificationRequest(this.stationInfo);
-    this.ocppConfiguration = this.getOcppConfiguration();
-    this.stationInfo?.Configuration && delete this.stationInfo.Configuration;
-    this.wsConfiguredConnectionUrl = new URL(
-      this.getConfiguredSupervisionUrl().href + '/' + this.stationInfo.chargingStationId
-    );
-    // Build connectors if needed
-    const maxConnectors = this.getMaxNumberOfConnectors();
-    this.checkMaxConnectors(maxConnectors);
-    const templateMaxConnectors = this.getTemplateMaxNumberOfConnectors();
-    this.checkTemplateMaxConnectors(templateMaxConnectors);
-    if (
-      maxConnectors >
-        (this.stationInfo?.Connectors[0] ? templateMaxConnectors - 1 : templateMaxConnectors) &&
-      !this.stationInfo.randomConnectors
-    ) {
-      logger.warn(
-        `${this.logPrefix()} Number of connectors exceeds the number of connector configurations in template ${
-          this.templateFile
-        }, forcing random connector configurations affectation`
-      );
-      this.stationInfo.randomConnectors = true;
-    }
-    this.initializeConnectors(this.stationInfo, maxConnectors, templateMaxConnectors);
-    this.stationInfo.maximumAmperage = this.getMaximumAmperage();
-    this.stationInfo = this.createStationInfoHash(this.stationInfo);
+    this.configurationFile = path.join(
+      path.dirname(this.templateFile.replace('station-templates', 'configurations')),
+      ChargingStationUtils.getHashId(this.index, this.getTemplateFromFile()) + '.json'
+    );
+    this.stationInfo = this.getStationInfo();
     this.saveStationInfo();
     // Avoid duplication of connectors related information in RAM
     this.stationInfo?.Connectors && delete this.stationInfo.Connectors;
-    // OCPP configuration
-    this.initializeOcppConfiguration();
+    this.configuredSupervisionUrl = this.getConfiguredSupervisionUrl();
     if (this.getEnableStatistics()) {
       this.performanceStatistics = PerformanceStatistics.getInstance(
-        this.hashId,
+        this.stationInfo.hashId,
         this.stationInfo.chargingStationId,
-        this.wsConnectionUrl
+        this.configuredSupervisionUrl
       );
     }
+    this.bootNotificationRequest = ChargingStationUtils.createBootNotificationRequest(
+      this.stationInfo
+    );
+    this.powerDivider = this.getPowerDivider();
+    // OCPP configuration
+    this.ocppConfiguration = this.getOcppConfiguration();
+    this.initializeOcppConfiguration();
     switch (this.getOcppVersion()) {
       case OCPPVersion.VERSION_16:
         this.ocppIncomingRequestService =
-          OCPP16IncomingRequestService.getInstance<OCPP16IncomingRequestService>(this);
+          OCPP16IncomingRequestService.getInstance<OCPP16IncomingRequestService>();
         this.ocppRequestService = OCPP16RequestService.getInstance<OCPP16RequestService>(
-          this,
-          OCPP16ResponseService.getInstance<OCPP16ResponseService>(this)
+          OCPP16ResponseService.getInstance<OCPP16ResponseService>()
         );
         break;
       default:
         this.handleUnsupportedVersion(this.getOcppVersion());
         break;
     }
-    if (this.stationInfo.autoRegister) {
+    if (this.stationInfo?.autoRegister === true) {
       this.bootNotificationResponse = {
         currentTime: new Date().toISOString(),
         interval: this.getHeartbeatInterval() / 1000,
         status: RegistrationStatus.ACCEPTED,
       };
     }
-    this.stationInfo.powerDivider = this.getPowerDivider();
   }
 
   private initializeOcppConfiguration(): void {
-    if (!this.getConfigurationKey(StandardParametersKey.HeartbeatInterval)) {
-      this.addConfigurationKey(StandardParametersKey.HeartbeatInterval, '0');
+    if (
+      !ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        StandardParametersKey.HeartbeatInterval
+      )
+    ) {
+      ChargingStationConfigurationUtils.addConfigurationKey(
+        this,
+        StandardParametersKey.HeartbeatInterval,
+        '0'
+      );
     }
-    if (!this.getConfigurationKey(StandardParametersKey.HeartBeatInterval)) {
-      this.addConfigurationKey(StandardParametersKey.HeartBeatInterval, '0', { visible: false });
+    if (
+      !ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        StandardParametersKey.HeartBeatInterval
+      )
+    ) {
+      ChargingStationConfigurationUtils.addConfigurationKey(
+        this,
+        StandardParametersKey.HeartBeatInterval,
+        '0',
+        { visible: false }
+      );
     }
     if (
       this.getSupervisionUrlOcppConfiguration() &&
-      !this.getConfigurationKey(this.getSupervisionUrlOcppKey())
+      !ChargingStationConfigurationUtils.getConfigurationKey(this, this.getSupervisionUrlOcppKey())
     ) {
-      this.addConfigurationKey(
+      ChargingStationConfigurationUtils.addConfigurationKey(
+        this,
         this.getSupervisionUrlOcppKey(),
-        this.getConfiguredSupervisionUrl().href,
+        this.configuredSupervisionUrl.href,
         { reboot: true }
       );
     } else if (
       !this.getSupervisionUrlOcppConfiguration() &&
-      this.getConfigurationKey(this.getSupervisionUrlOcppKey())
+      ChargingStationConfigurationUtils.getConfigurationKey(this, this.getSupervisionUrlOcppKey())
     ) {
-      this.deleteConfigurationKey(this.getSupervisionUrlOcppKey(), { save: false });
+      ChargingStationConfigurationUtils.deleteConfigurationKey(
+        this,
+        this.getSupervisionUrlOcppKey(),
+        { save: false }
+      );
     }
     if (
       this.stationInfo.amperageLimitationOcppKey &&
-      !this.getConfigurationKey(this.stationInfo.amperageLimitationOcppKey)
+      !ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        this.stationInfo.amperageLimitationOcppKey
+      )
     ) {
-      this.addConfigurationKey(
+      ChargingStationConfigurationUtils.addConfigurationKey(
+        this,
         this.stationInfo.amperageLimitationOcppKey,
-        (this.stationInfo.maximumAmperage * this.getAmperageLimitationUnitDivider()).toString()
+        (
+          this.stationInfo.maximumAmperage *
+          ChargingStationUtils.getAmperageLimitationUnitDivider(this.stationInfo)
+        ).toString()
       );
     }
-    if (!this.getConfigurationKey(StandardParametersKey.SupportedFeatureProfiles)) {
-      this.addConfigurationKey(
+    if (
+      !ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        StandardParametersKey.SupportedFeatureProfiles
+      )
+    ) {
+      ChargingStationConfigurationUtils.addConfigurationKey(
+        this,
         StandardParametersKey.SupportedFeatureProfiles,
         `${SupportedFeatureProfiles.Core},${SupportedFeatureProfiles.FirmwareManagement},${SupportedFeatureProfiles.LocalAuthListManagement},${SupportedFeatureProfiles.SmartCharging},${SupportedFeatureProfiles.RemoteTrigger}`
       );
     }
-    this.addConfigurationKey(
+    ChargingStationConfigurationUtils.addConfigurationKey(
+      this,
       StandardParametersKey.NumberOfConnectors,
       this.getNumberOfConnectors().toString(),
       { readonly: true },
       { overwrite: true }
     );
-    if (!this.getConfigurationKey(StandardParametersKey.MeterValuesSampledData)) {
-      this.addConfigurationKey(
+    if (
+      !ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        StandardParametersKey.MeterValuesSampledData
+      )
+    ) {
+      ChargingStationConfigurationUtils.addConfigurationKey(
+        this,
         StandardParametersKey.MeterValuesSampledData,
         MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER
       );
     }
-    if (!this.getConfigurationKey(StandardParametersKey.ConnectorPhaseRotation)) {
+    if (
+      !ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        StandardParametersKey.ConnectorPhaseRotation
+      )
+    ) {
       const connectorPhaseRotation = [];
       for (const connectorId of this.connectors.keys()) {
         // AC/DC
@@ -1251,24 +1077,48 @@ export default class ChargingStation {
           connectorPhaseRotation.push(`${connectorId}.${ConnectorPhaseRotation.RST}`);
         }
       }
-      this.addConfigurationKey(
+      ChargingStationConfigurationUtils.addConfigurationKey(
+        this,
         StandardParametersKey.ConnectorPhaseRotation,
         connectorPhaseRotation.toString()
       );
     }
-    if (!this.getConfigurationKey(StandardParametersKey.AuthorizeRemoteTxRequests)) {
-      this.addConfigurationKey(StandardParametersKey.AuthorizeRemoteTxRequests, 'true');
-    }
     if (
-      !this.getConfigurationKey(StandardParametersKey.LocalAuthListEnabled) &&
-      this.getConfigurationKey(StandardParametersKey.SupportedFeatureProfiles)?.value.includes(
-        SupportedFeatureProfiles.LocalAuthListManagement
+      !ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        StandardParametersKey.AuthorizeRemoteTxRequests
       )
     ) {
-      this.addConfigurationKey(StandardParametersKey.LocalAuthListEnabled, 'false');
+      ChargingStationConfigurationUtils.addConfigurationKey(
+        this,
+        StandardParametersKey.AuthorizeRemoteTxRequests,
+        'true'
+      );
+    }
+    if (
+      !ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        StandardParametersKey.LocalAuthListEnabled
+      ) &&
+      ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        StandardParametersKey.SupportedFeatureProfiles
+      )?.value.includes(SupportedFeatureProfiles.LocalAuthListManagement)
+    ) {
+      ChargingStationConfigurationUtils.addConfigurationKey(
+        this,
+        StandardParametersKey.LocalAuthListEnabled,
+        'false'
+      );
     }
-    if (!this.getConfigurationKey(StandardParametersKey.ConnectionTimeOut)) {
-      this.addConfigurationKey(
+    if (
+      !ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        StandardParametersKey.ConnectionTimeOut
+      )
+    ) {
+      ChargingStationConfigurationUtils.addConfigurationKey(
+        this,
         StandardParametersKey.ConnectionTimeOut,
         Constants.DEFAULT_CONNECTION_TIMEOUT.toString()
       );
@@ -1278,14 +1128,12 @@ export default class ChargingStation {
 
   private initializeConnectors(
     stationInfo: ChargingStationInfo,
-    maxConnectors: number,
+    configuredMaxConnectors: number,
     templateMaxConnectors: number
   ): void {
     if (!stationInfo?.Connectors && this.connectors.size === 0) {
-      const logMsg = `${this.logPrefix()} No already defined connectors and charging station information from template ${
-        this.templateFile
-      } with no connectors configuration defined`;
-      logger.error(logMsg);
+      const logMsg = `No already defined connectors and charging station information from template ${this.templateFile} with no connectors configuration defined`;
+      logger.error(`${this.logPrefix()} ${logMsg}`);
       throw new BaseError(logMsg);
     }
     if (!stationInfo?.Connectors[0]) {
@@ -1298,7 +1146,7 @@ export default class ChargingStation {
     if (stationInfo?.Connectors) {
       const connectorsConfigHash = crypto
         .createHash(Constants.DEFAULT_HASH_ALGORITHM)
-        .update(JSON.stringify(stationInfo?.Connectors) + maxConnectors.toString())
+        .update(JSON.stringify(stationInfo?.Connectors) + configuredMaxConnectors.toString())
         .digest('hex');
       const connectorsConfigChanged =
         this.connectors?.size !== 0 && this.connectorsConfigurationHash !== connectorsConfigHash;
@@ -1308,15 +1156,17 @@ export default class ChargingStation {
         // Add connector Id 0
         let lastConnector = '0';
         for (lastConnector in stationInfo?.Connectors) {
+          const connectorStatus = stationInfo?.Connectors[lastConnector];
           const lastConnectorId = Utils.convertToInt(lastConnector);
           if (
             lastConnectorId === 0 &&
-            this.getUseConnectorId0() &&
-            stationInfo?.Connectors[lastConnector]
+            this.getUseConnectorId0(stationInfo) === true &&
+            connectorStatus
           ) {
+            this.checkStationInfoConnectorStatus(lastConnectorId, connectorStatus);
             this.connectors.set(
               lastConnectorId,
-              Utils.cloneObject<ConnectorStatus>(stationInfo?.Connectors[lastConnector])
+              Utils.cloneObject<ConnectorStatus>(connectorStatus)
             );
             this.getConnectorStatus(lastConnectorId).availability = AvailabilityType.OPERATIVE;
             if (Utils.isUndefined(this.getConnectorStatus(lastConnectorId)?.chargingProfiles)) {
@@ -1326,14 +1176,13 @@ export default class ChargingStation {
         }
         // Generate all connectors
         if ((stationInfo?.Connectors[0] ? templateMaxConnectors - 1 : templateMaxConnectors) > 0) {
-          for (let index = 1; index <= maxConnectors; index++) {
-            const randConnectorId = stationInfo.randomConnectors
+          for (let index = 1; index <= configuredMaxConnectors; index++) {
+            const randConnectorId = stationInfo?.randomConnectors
               ? Utils.getRandomInteger(Utils.convertToInt(lastConnector), 1)
               : index;
-            this.connectors.set(
-              index,
-              Utils.cloneObject<ConnectorStatus>(stationInfo?.Connectors[randConnectorId])
-            );
+            const connectorStatus = stationInfo?.Connectors[randConnectorId.toString()];
+            this.checkStationInfoConnectorStatus(randConnectorId, connectorStatus);
+            this.connectors.set(index, Utils.cloneObject<ConnectorStatus>(connectorStatus));
             this.getConnectorStatus(index).availability = AvailabilityType.OPERATIVE;
             if (Utils.isUndefined(this.getConnectorStatus(index)?.chargingProfiles)) {
               this.getConnectorStatus(index).chargingProfiles = [];
@@ -1350,35 +1199,27 @@ export default class ChargingStation {
     }
     // Initialize transaction attributes on connectors
     for (const connectorId of this.connectors.keys()) {
-      if (connectorId > 0 && !this.getConnectorStatus(connectorId)?.transactionStarted) {
+      if (
+        connectorId > 0 &&
+        (this.getConnectorStatus(connectorId).transactionStarted === undefined ||
+          this.getConnectorStatus(connectorId).transactionStarted === false)
+      ) {
         this.initializeConnectorStatus(connectorId);
       }
     }
   }
 
-  private checkMaxConnectors(maxConnectors: number): void {
-    if (maxConnectors <= 0) {
-      logger.warn(
-        `${this.logPrefix()} Charging station information from template ${
-          this.templateFile
-        } with ${maxConnectors} connectors`
-      );
-    }
-  }
-
-  private checkTemplateMaxConnectors(templateMaxConnectors: number): void {
-    if (templateMaxConnectors === 0) {
+  private checkStationInfoConnectorStatus(
+    connectorId: number,
+    connectorStatus: ConnectorStatus
+  ): void {
+    if (!Utils.isNullOrUndefined(connectorStatus?.status)) {
       logger.warn(
         `${this.logPrefix()} Charging station information from template ${
           this.templateFile
-        } with empty connectors configuration`
-      );
-    } else if (templateMaxConnectors < 0) {
-      logger.error(
-        `${this.logPrefix()} Charging station information from template ${
-          this.templateFile
-        } with no connectors configuration defined`
+        } with connector ${connectorId} status configuration defined, undefine it`
       );
+      connectorStatus.status = undefined;
     }
   }
 
@@ -1386,12 +1227,20 @@ export default class ChargingStation {
     let configuration: ChargingStationConfiguration = null;
     if (this.configurationFile && fs.existsSync(this.configurationFile)) {
       try {
-        const measureId = `${FileType.ChargingStationConfiguration} read`;
-        const beginId = PerformanceStatistics.beginMeasure(measureId);
-        configuration = JSON.parse(
-          fs.readFileSync(this.configurationFile, 'utf8')
-        ) as ChargingStationConfiguration;
-        PerformanceStatistics.endMeasure(measureId, beginId);
+        if (this.sharedLRUCache.hasChargingStationConfiguration(this.configurationFileHash)) {
+          configuration = this.sharedLRUCache.getChargingStationConfiguration(
+            this.configurationFileHash
+          );
+        } else {
+          const measureId = `${FileType.ChargingStationConfiguration} read`;
+          const beginId = PerformanceStatistics.beginMeasure(measureId);
+          configuration = JSON.parse(
+            fs.readFileSync(this.configurationFile, 'utf8')
+          ) as ChargingStationConfiguration;
+          PerformanceStatistics.endMeasure(measureId, beginId);
+          this.configurationFileHash = configuration.configurationHash;
+          this.sharedLRUCache.setChargingStationConfiguration(configuration);
+        }
       } catch (error) {
         FileUtils.handleFileException(
           this.logPrefix(),
@@ -1404,42 +1253,40 @@ export default class ChargingStation {
     return configuration;
   }
 
-  private saveConfiguration(section?: Section): void {
+  private saveConfiguration(): void {
     if (this.configurationFile) {
       try {
-        const configurationData: ChargingStationConfiguration =
-          this.getConfigurationFromFile() ?? {};
         if (!fs.existsSync(path.dirname(this.configurationFile))) {
           fs.mkdirSync(path.dirname(this.configurationFile), { recursive: true });
         }
-        switch (section) {
-          case Section.ocppConfiguration:
-            configurationData.configurationKey = this.ocppConfiguration.configurationKey;
-            break;
-          case Section.stationInfo:
-            if (configurationData?.stationInfo?.infoHash === this.stationInfo?.infoHash) {
-              logger.debug(
-                `${this.logPrefix()} Not saving unchanged charging station information to configuration file ${
-                  this.configurationFile
-                }`
-              );
-              return;
-            }
-            configurationData.stationInfo = this.stationInfo;
-            break;
-          default:
-            configurationData.configurationKey = this.ocppConfiguration.configurationKey;
-            if (configurationData?.stationInfo?.infoHash !== this.stationInfo?.infoHash) {
-              configurationData.stationInfo = this.stationInfo;
-            }
-            break;
+        const configurationData: ChargingStationConfiguration =
+          this.getConfigurationFromFile() ?? {};
+        this.ocppConfiguration?.configurationKey &&
+          (configurationData.configurationKey = this.ocppConfiguration.configurationKey);
+        this.stationInfo && (configurationData.stationInfo = this.stationInfo);
+        delete configurationData.configurationHash;
+        const configurationHash = crypto
+          .createHash(Constants.DEFAULT_HASH_ALGORITHM)
+          .update(JSON.stringify(configurationData))
+          .digest('hex');
+        if (this.configurationFileHash !== configurationHash) {
+          configurationData.configurationHash = configurationHash;
+          const measureId = `${FileType.ChargingStationConfiguration} write`;
+          const beginId = PerformanceStatistics.beginMeasure(measureId);
+          const fileDescriptor = fs.openSync(this.configurationFile, 'w');
+          fs.writeFileSync(fileDescriptor, JSON.stringify(configurationData, null, 2), 'utf8');
+          fs.closeSync(fileDescriptor);
+          PerformanceStatistics.endMeasure(measureId, beginId);
+          this.sharedLRUCache.deleteChargingStationConfiguration(this.configurationFileHash);
+          this.configurationFileHash = configurationHash;
+          this.sharedLRUCache.setChargingStationConfiguration(configurationData);
+        } else {
+          logger.debug(
+            `${this.logPrefix()} Not saving unchanged charging station configuration file ${
+              this.configurationFile
+            }`
+          );
         }
-        const measureId = `${FileType.ChargingStationConfiguration} write`;
-        const beginId = PerformanceStatistics.beginMeasure(measureId);
-        const fileDescriptor = fs.openSync(this.configurationFile, 'w');
-        fs.writeFileSync(fileDescriptor, JSON.stringify(configurationData, null, 2), 'utf8');
-        fs.closeSync(fileDescriptor);
-        PerformanceStatistics.endMeasure(measureId, beginId);
       } catch (error) {
         FileUtils.handleFileException(
           this.logPrefix(),
@@ -1455,8 +1302,8 @@ export default class ChargingStation {
     }
   }
 
-  private getOcppConfigurationFromTemplate(): ChargingStationOcppConfiguration {
-    return this.getTemplateFromFile().Configuration ?? ({} as ChargingStationOcppConfiguration);
+  private getOcppConfigurationFromTemplate(): ChargingStationOcppConfiguration | null {
+    return this.getTemplateFromFile()?.Configuration ?? null;
   }
 
   private getOcppConfigurationFromFile(): ChargingStationOcppConfiguration | null {
@@ -1469,7 +1316,7 @@ export default class ChargingStation {
     return configuration;
   }
 
-  private getOcppConfiguration(): ChargingStationOcppConfiguration {
+  private getOcppConfiguration(): ChargingStationOcppConfiguration | null {
     let ocppConfiguration: ChargingStationOcppConfiguration = this.getOcppConfigurationFromFile();
     if (!ocppConfiguration) {
       ocppConfiguration = this.getOcppConfigurationFromTemplate();
@@ -1477,40 +1324,22 @@ export default class ChargingStation {
     return ocppConfiguration;
   }
 
-  private saveOcppConfiguration(): void {
-    if (this.getOcppPersistentConfiguration()) {
-      this.saveConfiguration(Section.ocppConfiguration);
-    }
-  }
-
   private async onOpen(): Promise<void> {
-    if (this.isWebSocketConnectionOpened()) {
+    if (this.isWebSocketConnectionOpened() === true) {
       logger.info(
         `${this.logPrefix()} Connection to OCPP server through ${this.wsConnectionUrl.toString()} succeeded`
       );
-      if (!this.isRegistered()) {
+      if (this.isRegistered() === false) {
         // Send BootNotification
         let registrationRetryCount = 0;
         do {
           this.bootNotificationResponse = await this.ocppRequestService.requestHandler<
             BootNotificationRequest,
             BootNotificationResponse
-          >(
-            RequestCommand.BOOT_NOTIFICATION,
-            {
-              chargePointModel: this.bootNotificationRequest.chargePointModel,
-              chargePointVendor: this.bootNotificationRequest.chargePointVendor,
-              chargeBoxSerialNumber: this.bootNotificationRequest.chargeBoxSerialNumber,
-              firmwareVersion: this.bootNotificationRequest.firmwareVersion,
-              chargePointSerialNumber: this.bootNotificationRequest.chargePointSerialNumber,
-              iccid: this.bootNotificationRequest.iccid,
-              imsi: this.bootNotificationRequest.imsi,
-              meterSerialNumber: this.bootNotificationRequest.meterSerialNumber,
-              meterType: this.bootNotificationRequest.meterType,
-            },
-            { skipBufferingOnError: true }
-          );
-          if (!this.isRegistered()) {
+          >(this, RequestCommand.BOOT_NOTIFICATION, this.bootNotificationRequest, {
+            skipBufferingOnError: true,
+          });
+          if (this.isRegistered() === false) {
             this.getRegistrationMaxRetries() !== -1 && registrationRetryCount++;
             await Utils.sleep(
               this.bootNotificationResponse?.interval
@@ -1519,24 +1348,23 @@ export default class ChargingStation {
             );
           }
         } while (
-          !this.isRegistered() &&
+          this.isRegistered() === false &&
           (registrationRetryCount <= this.getRegistrationMaxRetries() ||
             this.getRegistrationMaxRetries() === -1)
         );
       }
-      if (this.isRegistered()) {
+      if (this.isRegistered() === true) {
         if (this.isInAcceptedState()) {
           await this.startMessageSequence();
-          this.wsConnectionRestarted && this.flushMessageBuffer();
         }
       } else {
         logger.error(
           `${this.logPrefix()} Registration failure: max retries reached (${this.getRegistrationMaxRetries()}) or retry disabled (${this.getRegistrationMaxRetries()})`
         );
       }
-      this.stopped && (this.stopped = false);
-      this.autoReconnectRetryCount = 0;
       this.wsConnectionRestarted = false;
+      this.autoReconnectRetryCount = 0;
+      parentPort.postMessage(MessageChannelUtils.buildUpdatedMessage(this));
     } else {
       logger.warn(
         `${this.logPrefix()} Connection to OCPP server through ${this.wsConnectionUrl.toString()} failed`
@@ -1563,9 +1391,10 @@ export default class ChargingStation {
             code
           )}' and reason '${reason}'`
         );
-        await this.reconnect(code);
+        this.started === true && (await this.reconnect());
         break;
     }
+    parentPort.postMessage(MessageChannelUtils.buildUpdatedMessage(this));
   }
 
   private async onMessage(data: Data): Promise<void> {
@@ -1584,14 +1413,14 @@ export default class ChargingStation {
     let errMsg: string;
     try {
       const request = JSON.parse(data.toString()) as IncomingRequest | Response | ErrorResponse;
-      if (Utils.isIterable(request)) {
+      if (Array.isArray(request) === true) {
         [messageType, messageId] = request;
         // Check the type of message
         switch (messageType) {
           // Incoming Message
           case MessageType.CALL_MESSAGE:
             [, , commandName, commandPayload] = request as IncomingRequest;
-            if (this.getEnableStatistics()) {
+            if (this.getEnableStatistics() === true) {
               this.performanceStatistics.addRequestStatistic(commandName, messageType);
             }
             logger.debug(
@@ -1601,6 +1430,7 @@ export default class ChargingStation {
             );
             // Process the message
             await this.ocppIncomingRequestService.incomingRequestHandler(
+              this,
               messageId,
               commandName,
               commandPayload
@@ -1609,7 +1439,7 @@ export default class ChargingStation {
           // Outcome Message
           case MessageType.CALL_RESULT_MESSAGE:
             [, , commandPayload] = request as Response;
-            if (!this.requests.has(messageId)) {
+            if (this.requests.has(messageId) === false) {
               // Error
               throw new OCPPError(
                 ErrorType.INTERNAL_ERROR,
@@ -1620,19 +1450,19 @@ export default class ChargingStation {
             }
             // Respond
             cachedRequest = this.requests.get(messageId);
-            if (Utils.isIterable(cachedRequest)) {
-              [responseCallback, , requestCommandName, requestPayload] = cachedRequest;
+            if (Array.isArray(cachedRequest) === true) {
+              [responseCallback, errorCallback, requestCommandName, requestPayload] = cachedRequest;
             } else {
               throw new OCPPError(
                 ErrorType.PROTOCOL_ERROR,
-                `Cached request for message id ${messageId} response is not iterable`,
+                `Cached request for message id ${messageId} response is not an array`,
                 null,
                 cachedRequest as unknown as JsonType
               );
             }
             logger.debug(
               `${this.logPrefix()} << Command '${
-                requestCommandName ?? ''
+                requestCommandName ?? Constants.UNKNOWN_COMMAND
               }' received response payload: ${JSON.stringify(request)}`
             );
             responseCallback(commandPayload, requestPayload);
@@ -1640,7 +1470,7 @@ export default class ChargingStation {
           // Error Message
           case MessageType.CALL_ERROR_MESSAGE:
             [, , errorType, errorMessage, errorDetails] = request as ErrorResponse;
-            if (!this.requests.has(messageId)) {
+            if (this.requests.has(messageId) === false) {
               // Error
               throw new OCPPError(
                 ErrorType.INTERNAL_ERROR,
@@ -1650,19 +1480,19 @@ export default class ChargingStation {
               );
             }
             cachedRequest = this.requests.get(messageId);
-            if (Utils.isIterable(cachedRequest)) {
+            if (Array.isArray(cachedRequest) === true) {
               [, errorCallback, requestCommandName] = cachedRequest;
             } else {
               throw new OCPPError(
                 ErrorType.PROTOCOL_ERROR,
-                `Cached request for message id ${messageId} error response is not iterable`,
+                `Cached request for message id ${messageId} error response is not an array`,
                 null,
                 cachedRequest as unknown as JsonType
               );
             }
             logger.debug(
               `${this.logPrefix()} << Command '${
-                requestCommandName ?? ''
+                requestCommandName ?? Constants.UNKNOWN_COMMAND
               }' received error payload: ${JSON.stringify(request)}`
             );
             errorCallback(new OCPPError(errorType, errorMessage, requestCommandName, errorDetails));
@@ -1670,31 +1500,57 @@ export default class ChargingStation {
           // Error
           default:
             // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
-            errMsg = `${this.logPrefix()} Wrong message type ${messageType}`;
-            logger.error(errMsg);
+            errMsg = `Wrong message type ${messageType}`;
+            logger.error(`${this.logPrefix()} ${errMsg}`);
             throw new OCPPError(ErrorType.PROTOCOL_ERROR, errMsg);
         }
+        parentPort.postMessage(MessageChannelUtils.buildUpdatedMessage(this));
       } else {
-        throw new OCPPError(ErrorType.PROTOCOL_ERROR, 'Incoming message is not iterable', null, {
-          payload: request,
+        throw new OCPPError(ErrorType.PROTOCOL_ERROR, 'Incoming message is not an array', null, {
+          request,
         });
       }
     } catch (error) {
       // Log
       logger.error(
-        '%s Incoming OCPP message %j matching cached request %j processing error %j',
-        this.logPrefix(),
-        data.toString(),
-        this.requests.get(messageId),
+        `${this.logPrefix()} Incoming OCPP command '${
+          commandName ?? requestCommandName ?? Constants.UNKNOWN_COMMAND
+        }' message '${data.toString()}'${
+          messageType !== MessageType.CALL_MESSAGE
+            ? ` matching cached request '${JSON.stringify(this.requests.get(messageId))}'`
+            : ''
+        } processing error:`,
         error
       );
-      // Send error
-      messageType === MessageType.CALL_MESSAGE &&
-        (await this.ocppRequestService.sendError(
-          messageId,
-          error as OCPPError,
-          commandName ?? requestCommandName ?? null
-        ));
+      if (error instanceof OCPPError === false) {
+        logger.warn(
+          `${this.logPrefix()} Error thrown at incoming OCPP command '${
+            commandName ?? requestCommandName ?? Constants.UNKNOWN_COMMAND
+          }' message '${data.toString()}' handling is not an OCPPError:`,
+          error
+        );
+      }
+      switch (messageType) {
+        case MessageType.CALL_MESSAGE:
+          // Send error
+          await this.ocppRequestService.sendError(
+            this,
+            messageId,
+            error as OCPPError,
+            commandName ?? requestCommandName ?? null
+          );
+          break;
+        case MessageType.CALL_RESULT_MESSAGE:
+        case MessageType.CALL_ERROR_MESSAGE:
+          if (errorCallback) {
+            // Reject the deferred promise in case of error at response handling (rejecting an already fulfilled promise is a no-op)
+            errorCallback(error as OCPPError, false);
+          } else {
+            // Remove the request from the cache in case of error at response handling
+            this.requests.delete(messageId);
+          }
+          break;
+      }
     }
   }
 
@@ -1707,72 +1563,75 @@ export default class ChargingStation {
   }
 
   private onError(error: WSError): void {
-    logger.error(this.logPrefix() + ' WebSocket error: %j', error);
-  }
-
-  private getAuthorizationFile(): string | undefined {
-    return (
-      this.stationInfo.authorizationFile &&
-      path.join(
-        path.resolve(__dirname, '../'),
-        'assets',
-        path.basename(this.stationInfo.authorizationFile)
-      )
-    );
+    this.closeWSConnection();
+    logger.error(this.logPrefix() + ' WebSocket error:', error);
   }
 
-  private getAuthorizedTags(): string[] {
-    let authorizedTags: string[] = [];
-    const authorizationFile = this.getAuthorizationFile();
-    if (authorizationFile) {
-      try {
-        // Load authorization file
-        authorizedTags = JSON.parse(fs.readFileSync(authorizationFile, 'utf8')) as string[];
-      } catch (error) {
-        FileUtils.handleFileException(
-          this.logPrefix(),
-          FileType.Authorization,
-          authorizationFile,
-          error as NodeJS.ErrnoException
-        );
-      }
-    } else {
-      logger.info(
-        this.logPrefix() + ' No authorization file given in template file ' + this.templateFile
+  private getEnergyActiveImportRegister(
+    connectorStatus: ConnectorStatus,
+    meterStop = false
+  ): number {
+    if (this.getMeteringPerTransaction() === true) {
+      return (
+        (meterStop === true
+          ? Math.round(connectorStatus?.transactionEnergyActiveImportRegisterValue)
+          : connectorStatus?.transactionEnergyActiveImportRegisterValue) ?? 0
       );
     }
-    return authorizedTags;
+    return (
+      (meterStop === true
+        ? Math.round(connectorStatus?.energyActiveImportRegisterValue)
+        : connectorStatus?.energyActiveImportRegisterValue) ?? 0
+    );
   }
 
-  private getUseConnectorId0(): boolean | undefined {
-    return !Utils.isUndefined(this.stationInfo.useConnectorId0)
-      ? this.stationInfo.useConnectorId0
+  private getUseConnectorId0(stationInfo?: ChargingStationInfo): boolean {
+    const localStationInfo = stationInfo ?? this.stationInfo;
+    return !Utils.isUndefined(localStationInfo.useConnectorId0)
+      ? localStationInfo.useConnectorId0
       : true;
   }
 
   private getNumberOfRunningTransactions(): number {
     let trxCount = 0;
     for (const connectorId of this.connectors.keys()) {
-      if (connectorId > 0 && this.getConnectorStatus(connectorId)?.transactionStarted) {
+      if (connectorId > 0 && this.getConnectorStatus(connectorId)?.transactionStarted === true) {
         trxCount++;
       }
     }
     return trxCount;
   }
 
+  private async stopRunningTransactions(reason = StopTransactionReason.NONE): Promise<void> {
+    for (const connectorId of this.connectors.keys()) {
+      if (connectorId > 0 && this.getConnectorStatus(connectorId)?.transactionStarted === true) {
+        await this.stopTransactionOnConnector(connectorId, reason);
+      }
+    }
+  }
+
   // 0 for disabling
-  private getConnectionTimeout(): number | undefined {
-    if (this.getConfigurationKey(StandardParametersKey.ConnectionTimeOut)) {
+  private getConnectionTimeout(): number {
+    if (
+      ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        StandardParametersKey.ConnectionTimeOut
+      )
+    ) {
       return (
-        parseInt(this.getConfigurationKey(StandardParametersKey.ConnectionTimeOut).value) ??
-        Constants.DEFAULT_CONNECTION_TIMEOUT
+        parseInt(
+          ChargingStationConfigurationUtils.getConfigurationKey(
+            this,
+            StandardParametersKey.ConnectionTimeOut
+          ).value
+        ) ?? Constants.DEFAULT_CONNECTION_TIMEOUT
       );
     }
     return Constants.DEFAULT_CONNECTION_TIMEOUT;
   }
 
   // -1 for unlimited, 0 for disabling
-  private getAutoReconnectMaxRetries(): number | undefined {
+  private getAutoReconnectMaxRetries(): number {
     if (!Utils.isUndefined(this.stationInfo.autoReconnectMaxRetries)) {
       return this.stationInfo.autoReconnectMaxRetries;
     }
@@ -1783,7 +1642,7 @@ export default class ChargingStation {
   }
 
   // 0 for disabling
-  private getRegistrationMaxRetries(): number | undefined {
+  private getRegistrationMaxRetries(): number {
     if (!Utils.isUndefined(this.stationInfo.registrationMaxRetries)) {
       return this.stationInfo.registrationMaxRetries;
     }
@@ -1792,102 +1651,109 @@ export default class ChargingStation {
 
   private getPowerDivider(): number {
     let powerDivider = this.getNumberOfConnectors();
-    if (this.stationInfo.powerSharedByConnectors) {
+    if (this.stationInfo?.powerSharedByConnectors) {
       powerDivider = this.getNumberOfRunningTransactions();
     }
     return powerDivider;
   }
 
-  private getTemplateMaxNumberOfConnectors(): number {
-    if (!this.stationInfo?.Connectors) {
-      return -1;
-    }
-    return Object.keys(this.stationInfo?.Connectors).length;
-  }
-
-  private getMaxNumberOfConnectors(): number {
-    let maxConnectors: number;
-    if (!Utils.isEmptyArray(this.stationInfo.numberOfConnectors)) {
-      const numberOfConnectors = this.stationInfo.numberOfConnectors as number[];
-      // Distribute evenly the number of connectors
-      maxConnectors = numberOfConnectors[(this.index - 1) % numberOfConnectors.length];
-    } else if (!Utils.isUndefined(this.stationInfo.numberOfConnectors)) {
-      maxConnectors = this.stationInfo.numberOfConnectors as number;
-    } else {
-      maxConnectors = this.stationInfo?.Connectors[0]
-        ? this.getTemplateMaxNumberOfConnectors() - 1
-        : this.getTemplateMaxNumberOfConnectors();
-    }
-    return maxConnectors;
-  }
-
-  private getMaximumPower(): number {
-    return (this.stationInfo['maxPower'] as number) ?? this.stationInfo.maximumPower;
+  private getMaximumPower(stationInfo?: ChargingStationInfo): number {
+    const localStationInfo = stationInfo ?? this.stationInfo;
+    return (localStationInfo['maxPower'] as number) ?? localStationInfo.maximumPower;
   }
 
-  private getMaximumAmperage(): number | undefined {
-    const maximumPower = this.getMaximumPower();
-    switch (this.getCurrentOutType()) {
+  private getMaximumAmperage(stationInfo: ChargingStationInfo): number | undefined {
+    const maximumPower = this.getMaximumPower(stationInfo);
+    switch (this.getCurrentOutType(stationInfo)) {
       case CurrentType.AC:
         return ACElectricUtils.amperagePerPhaseFromPower(
-          this.getNumberOfPhases(),
+          this.getNumberOfPhases(stationInfo),
           maximumPower / this.getNumberOfConnectors(),
-          this.getVoltageOut()
+          this.getVoltageOut(stationInfo)
         );
       case CurrentType.DC:
-        return DCElectricUtils.amperage(maximumPower, this.getVoltageOut());
-    }
-  }
-
-  private getAmperageLimitationUnitDivider(): number {
-    let unitDivider = 1;
-    switch (this.stationInfo.amperageLimitationUnit) {
-      case AmpereUnits.DECI_AMPERE:
-        unitDivider = 10;
-        break;
-      case AmpereUnits.CENTI_AMPERE:
-        unitDivider = 100;
-        break;
-      case AmpereUnits.MILLI_AMPERE:
-        unitDivider = 1000;
-        break;
+        return DCElectricUtils.amperage(maximumPower, this.getVoltageOut(stationInfo));
     }
-    return unitDivider;
   }
 
   private getAmperageLimitation(): number | undefined {
     if (
       this.stationInfo.amperageLimitationOcppKey &&
-      this.getConfigurationKey(this.stationInfo.amperageLimitationOcppKey)
+      ChargingStationConfigurationUtils.getConfigurationKey(
+        this,
+        this.stationInfo.amperageLimitationOcppKey
+      )
     ) {
       return (
         Utils.convertToInt(
-          this.getConfigurationKey(this.stationInfo.amperageLimitationOcppKey).value
-        ) / this.getAmperageLimitationUnitDivider()
+          ChargingStationConfigurationUtils.getConfigurationKey(
+            this,
+            this.stationInfo.amperageLimitationOcppKey
+          ).value
+        ) / ChargingStationUtils.getAmperageLimitationUnitDivider(this.stationInfo)
+      );
+    }
+  }
+
+  private getChargingProfilePowerLimit(connectorId: number): number | undefined {
+    let limit: number, matchingChargingProfile: ChargingProfile;
+    let chargingProfiles: ChargingProfile[] = [];
+    // Get charging profiles for connector and sort by stack level
+    chargingProfiles = this.getConnectorStatus(connectorId).chargingProfiles.sort(
+      (a, b) => b.stackLevel - a.stackLevel
+    );
+    // Get profiles on connector 0
+    if (this.getConnectorStatus(0).chargingProfiles) {
+      chargingProfiles.push(
+        ...this.getConnectorStatus(0).chargingProfiles.sort((a, b) => b.stackLevel - a.stackLevel)
+      );
+    }
+    if (!Utils.isEmptyArray(chargingProfiles)) {
+      const result = ChargingStationUtils.getLimitFromChargingProfiles(
+        chargingProfiles,
+        this.logPrefix()
       );
+      if (!Utils.isNullOrUndefined(result)) {
+        limit = result.limit;
+        matchingChargingProfile = result.matchingChargingProfile;
+        switch (this.getCurrentOutType()) {
+          case CurrentType.AC:
+            limit =
+              matchingChargingProfile.chargingSchedule.chargingRateUnit ===
+              ChargingRateUnitType.WATT
+                ? limit
+                : ACElectricUtils.powerTotal(this.getNumberOfPhases(), this.getVoltageOut(), limit);
+            break;
+          case CurrentType.DC:
+            limit =
+              matchingChargingProfile.chargingSchedule.chargingRateUnit ===
+              ChargingRateUnitType.WATT
+                ? limit
+                : DCElectricUtils.power(this.getVoltageOut(), limit);
+        }
+        const connectorMaximumPower = this.getMaximumPower() / this.powerDivider;
+        if (limit > connectorMaximumPower) {
+          logger.error(
+            `${this.logPrefix()} Charging profile id ${
+              matchingChargingProfile.chargingProfileId
+            } limit is greater than connector id ${connectorId} maximum, dump charging profiles' stack: %j`,
+            this.getConnectorStatus(connectorId).chargingProfiles
+          );
+          limit = connectorMaximumPower;
+        }
+      }
     }
+    return limit;
   }
 
   private async startMessageSequence(): Promise<void> {
-    if (this.stationInfo.autoRegister) {
+    if (this.stationInfo?.autoRegister === true) {
       await this.ocppRequestService.requestHandler<
         BootNotificationRequest,
         BootNotificationResponse
-      >(
-        RequestCommand.BOOT_NOTIFICATION,
-        {
-          chargePointModel: this.bootNotificationRequest.chargePointModel,
-          chargePointVendor: this.bootNotificationRequest.chargePointVendor,
-          chargeBoxSerialNumber: this.bootNotificationRequest.chargeBoxSerialNumber,
-          firmwareVersion: this.bootNotificationRequest.firmwareVersion,
-          chargePointSerialNumber: this.bootNotificationRequest.chargePointSerialNumber,
-          iccid: this.bootNotificationRequest.iccid,
-          imsi: this.bootNotificationRequest.imsi,
-          meterSerialNumber: this.bootNotificationRequest.meterSerialNumber,
-          meterType: this.bootNotificationRequest.meterType,
-        },
-        { skipBufferingOnError: true }
-      );
+      >(this, RequestCommand.BOOT_NOTIFICATION, this.bootNotificationRequest, {
+        skipBufferingOnError: true,
+      });
     }
     // Start WebSocket ping
     this.startWebSocketPing();
@@ -1895,76 +1761,43 @@ export default class ChargingStation {
     this.startHeartbeat();
     // Initialize connectors status
     for (const connectorId of this.connectors.keys()) {
+      let chargePointStatus: ChargePointStatus;
       if (connectorId === 0) {
         continue;
       } else if (
-        !this.stopped &&
         !this.getConnectorStatus(connectorId)?.status &&
-        this.getConnectorStatus(connectorId)?.bootStatus
+        (this.isChargingStationAvailable() === false ||
+          this.isConnectorAvailable(connectorId) === false)
       ) {
-        // Send status in template at startup
-        await this.ocppRequestService.requestHandler<
-          StatusNotificationRequest,
-          StatusNotificationResponse
-        >(RequestCommand.STATUS_NOTIFICATION, {
-          connectorId,
-          status: this.getConnectorStatus(connectorId).bootStatus,
-          errorCode: ChargePointErrorCode.NO_ERROR,
-        });
-        this.getConnectorStatus(connectorId).status =
-          this.getConnectorStatus(connectorId).bootStatus;
+        chargePointStatus = ChargePointStatus.UNAVAILABLE;
       } else if (
-        this.stopped &&
-        this.getConnectorStatus(connectorId)?.status &&
+        !this.getConnectorStatus(connectorId)?.status &&
         this.getConnectorStatus(connectorId)?.bootStatus
       ) {
-        // Send status in template after reset
-        await this.ocppRequestService.requestHandler<
-          StatusNotificationRequest,
-          StatusNotificationResponse
-        >(RequestCommand.STATUS_NOTIFICATION, {
-          connectorId,
-          status: this.getConnectorStatus(connectorId).bootStatus,
-          errorCode: ChargePointErrorCode.NO_ERROR,
-        });
-        this.getConnectorStatus(connectorId).status =
-          this.getConnectorStatus(connectorId).bootStatus;
-      } else if (!this.stopped && this.getConnectorStatus(connectorId)?.status) {
-        // Send previous status at template reload
-        await this.ocppRequestService.requestHandler<
-          StatusNotificationRequest,
-          StatusNotificationResponse
-        >(RequestCommand.STATUS_NOTIFICATION, {
-          connectorId,
-          status: this.getConnectorStatus(connectorId).status,
-          errorCode: ChargePointErrorCode.NO_ERROR,
-        });
+        // Set boot status in template at startup
+        chargePointStatus = this.getConnectorStatus(connectorId).bootStatus;
+      } else if (this.getConnectorStatus(connectorId)?.status) {
+        // Set previous status at startup
+        chargePointStatus = this.getConnectorStatus(connectorId).status;
       } else {
-        // Send default status
-        await this.ocppRequestService.requestHandler<
-          StatusNotificationRequest,
-          StatusNotificationResponse
-        >(RequestCommand.STATUS_NOTIFICATION, {
-          connectorId,
-          status: ChargePointStatus.AVAILABLE,
-          errorCode: ChargePointErrorCode.NO_ERROR,
-        });
-        this.getConnectorStatus(connectorId).status = ChargePointStatus.AVAILABLE;
+        // Set default status
+        chargePointStatus = ChargePointStatus.AVAILABLE;
       }
+      await this.ocppRequestService.requestHandler<
+        StatusNotificationRequest,
+        StatusNotificationResponse
+      >(this, RequestCommand.STATUS_NOTIFICATION, {
+        connectorId,
+        status: chargePointStatus,
+        errorCode: ChargePointErrorCode.NO_ERROR,
+      });
+      this.getConnectorStatus(connectorId).status = chargePointStatus;
     }
     // Start the ATG
-    this.startAutomaticTransactionGenerator();
-  }
-
-  private startAutomaticTransactionGenerator() {
-    if (this.stationInfo.AutomaticTransactionGenerator.enable) {
-      if (!this.automaticTransactionGenerator) {
-        this.automaticTransactionGenerator = AutomaticTransactionGenerator.getInstance(this);
-      }
-      if (!this.automaticTransactionGenerator.started) {
-        this.automaticTransactionGenerator.start();
-      }
+    if (this.getAutomaticTransactionGeneratorConfigurationFromTemplate()?.enable === true) {
+      this.startAutomaticTransactionGenerator();
     }
+    this.wsConnectionRestarted === true && this.flushMessageBuffer();
   }
 
   private async stopMessageSequence(
@@ -1974,61 +1807,42 @@ export default class ChargingStation {
     this.stopWebSocketPing();
     // Stop heartbeat
     this.stopHeartbeat();
-    // Stop the ATG
-    if (
-      this.stationInfo.AutomaticTransactionGenerator.enable &&
-      this.automaticTransactionGenerator?.started
-    ) {
-      this.automaticTransactionGenerator.stop();
+    // Stop ongoing transactions
+    if (this.automaticTransactionGenerator?.started === true) {
+      this.stopAutomaticTransactionGenerator();
     } else {
-      for (const connectorId of this.connectors.keys()) {
-        if (connectorId > 0 && this.getConnectorStatus(connectorId)?.transactionStarted) {
-          const transactionId = this.getConnectorStatus(connectorId).transactionId;
-          if (
-            this.getBeginEndMeterValues() &&
-            this.getOcppStrictCompliance() &&
-            !this.getOutOfOrderEndMeterValues()
-          ) {
-            // FIXME: Implement OCPP version agnostic helpers
-            const transactionEndMeterValue = OCPP16ServiceUtils.buildTransactionEndMeterValue(
-              this,
-              connectorId,
-              this.getEnergyActiveImportRegisterByTransactionId(transactionId)
-            );
-            await this.ocppRequestService.requestHandler<MeterValuesRequest, MeterValuesResponse>(
-              RequestCommand.METER_VALUES,
-              {
-                connectorId,
-                transactionId,
-                meterValue: transactionEndMeterValue,
-              }
-            );
-          }
-          await this.ocppRequestService.requestHandler<
-            StopTransactionRequest,
-            StopTransactionResponse
-          >(RequestCommand.STOP_TRANSACTION, {
-            transactionId,
-            meterStop: this.getEnergyActiveImportRegisterByTransactionId(transactionId),
-            idTag: this.getTransactionIdTag(transactionId),
-            reason,
-          });
-        }
+      await this.stopRunningTransactions(reason);
+    }
+    for (const connectorId of this.connectors.keys()) {
+      if (connectorId > 0) {
+        await this.ocppRequestService.requestHandler<
+          StatusNotificationRequest,
+          StatusNotificationResponse
+        >(this, RequestCommand.STATUS_NOTIFICATION, {
+          connectorId,
+          status: ChargePointStatus.UNAVAILABLE,
+          errorCode: ChargePointErrorCode.NO_ERROR,
+        });
+        this.getConnectorStatus(connectorId).status = null;
       }
     }
   }
 
   private startWebSocketPing(): void {
-    const webSocketPingInterval: number = this.getConfigurationKey(
+    const webSocketPingInterval: number = ChargingStationConfigurationUtils.getConfigurationKey(
+      this,
       StandardParametersKey.WebSocketPingInterval
     )
       ? Utils.convertToInt(
-          this.getConfigurationKey(StandardParametersKey.WebSocketPingInterval).value
+          ChargingStationConfigurationUtils.getConfigurationKey(
+            this,
+            StandardParametersKey.WebSocketPingInterval
+          ).value
         )
       : 0;
     if (webSocketPingInterval > 0 && !this.webSocketPingSetInterval) {
       this.webSocketPingSetInterval = setInterval(() => {
-        if (this.isWebSocketConnectionOpened()) {
+        if (this.isWebSocketConnectionOpened() === true) {
           this.wsConnection.ping((): void => {
             /* This is intentional */
           });
@@ -2042,9 +1856,8 @@ export default class ChargingStation {
     } else if (this.webSocketPingSetInterval) {
       logger.info(
         this.logPrefix() +
-          ' WebSocket ping every ' +
-          Utils.formatDurationSeconds(webSocketPingInterval) +
-          ' already started'
+          ' WebSocket ping already started every ' +
+          Utils.formatDurationSeconds(webSocketPingInterval)
       );
     } else {
       logger.error(
@@ -2063,80 +1876,54 @@ export default class ChargingStation {
     }
   }
 
-  private warnDeprecatedTemplateKey(
-    template: ChargingStationTemplate,
-    key: string,
-    chargingStationId: string,
-    logMsgToAppend = ''
-  ): void {
-    if (!Utils.isUndefined(template[key])) {
-      const logPrefixStr = ` ${chargingStationId} |`;
-      logger.warn(
-        `${Utils.logPrefix(logPrefixStr)} Deprecated template key '${key}' usage in file '${
-          this.templateFile
-        }'${logMsgToAppend && '. ' + logMsgToAppend}`
-      );
-    }
-  }
-
-  private convertDeprecatedTemplateKey(
-    template: ChargingStationTemplate,
-    deprecatedKey: string,
-    key: string
-  ): void {
-    if (!Utils.isUndefined(template[deprecatedKey])) {
-      template[key] = template[deprecatedKey] as unknown;
-      delete template[deprecatedKey];
-    }
-  }
-
   private getConfiguredSupervisionUrl(): URL {
     const supervisionUrls = Utils.cloneObject<string | string[]>(
       this.stationInfo.supervisionUrls ?? Configuration.getSupervisionUrls()
     );
     if (!Utils.isEmptyArray(supervisionUrls)) {
-      let urlIndex = 0;
       switch (Configuration.getSupervisionUrlDistribution()) {
         case SupervisionUrlDistribution.ROUND_ROBIN:
-          urlIndex = (this.index - 1) % supervisionUrls.length;
+          // FIXME
+          this.configuredSupervisionUrlIndex = (this.index - 1) % supervisionUrls.length;
           break;
         case SupervisionUrlDistribution.RANDOM:
-          // Get a random url
-          urlIndex = Math.floor(Utils.secureRandom() * supervisionUrls.length);
+          this.configuredSupervisionUrlIndex = Math.floor(
+            Utils.secureRandom() * supervisionUrls.length
+          );
           break;
-        case SupervisionUrlDistribution.SEQUENTIAL:
-          if (this.index <= supervisionUrls.length) {
-            urlIndex = this.index - 1;
-          } else {
-            logger.warn(
-              `${this.logPrefix()} No more configured supervision urls available, using the first one`
-            );
-          }
+        case SupervisionUrlDistribution.CHARGING_STATION_AFFINITY:
+          this.configuredSupervisionUrlIndex = (this.index - 1) % supervisionUrls.length;
           break;
         default:
           logger.error(
             `${this.logPrefix()} Unknown supervision url distribution '${Configuration.getSupervisionUrlDistribution()}' from values '${SupervisionUrlDistribution.toString()}', defaulting to ${
-              SupervisionUrlDistribution.ROUND_ROBIN
+              SupervisionUrlDistribution.CHARGING_STATION_AFFINITY
             }`
           );
-          urlIndex = (this.index - 1) % supervisionUrls.length;
+          this.configuredSupervisionUrlIndex = (this.index - 1) % supervisionUrls.length;
           break;
       }
-      return new URL(supervisionUrls[urlIndex]);
+      return new URL(supervisionUrls[this.configuredSupervisionUrlIndex]);
     }
     return new URL(supervisionUrls as string);
   }
 
-  private getHeartbeatInterval(): number | undefined {
-    const HeartbeatInterval = this.getConfigurationKey(StandardParametersKey.HeartbeatInterval);
+  private getHeartbeatInterval(): number {
+    const HeartbeatInterval = ChargingStationConfigurationUtils.getConfigurationKey(
+      this,
+      StandardParametersKey.HeartbeatInterval
+    );
     if (HeartbeatInterval) {
       return Utils.convertToInt(HeartbeatInterval.value) * 1000;
     }
-    const HeartBeatInterval = this.getConfigurationKey(StandardParametersKey.HeartBeatInterval);
+    const HeartBeatInterval = ChargingStationConfigurationUtils.getConfigurationKey(
+      this,
+      StandardParametersKey.HeartBeatInterval
+    );
     if (HeartBeatInterval) {
       return Utils.convertToInt(HeartBeatInterval.value) * 1000;
     }
-    !this.stationInfo.autoRegister &&
+    this.stationInfo?.autoRegister === false &&
       logger.warn(
         `${this.logPrefix()} Heartbeat interval configuration key not set, using default value: ${
           Constants.DEFAULT_HEARTBEAT_INTERVAL
@@ -2151,33 +1938,11 @@ export default class ChargingStation {
     }
   }
 
-  private openWSConnection(
-    options: WsOptions = this.stationInfo.wsOptions,
-    forceCloseOpened = false
-  ): void {
-    options.handshakeTimeout = options?.handshakeTimeout ?? this.getConnectionTimeout() * 1000;
-    if (
-      !Utils.isNullOrUndefined(this.stationInfo.supervisionUser) &&
-      !Utils.isNullOrUndefined(this.stationInfo.supervisionPassword)
-    ) {
-      options.auth = `${this.stationInfo.supervisionUser}:${this.stationInfo.supervisionPassword}`;
-    }
-    if (this.isWebSocketConnectionOpened() && forceCloseOpened) {
-      this.wsConnection.close();
-    }
-    let protocol: string;
-    switch (this.getOcppVersion()) {
-      case OCPPVersion.VERSION_16:
-        protocol = 'ocpp' + OCPPVersion.VERSION_16;
-        break;
-      default:
-        this.handleUnsupportedVersion(this.getOcppVersion());
-        break;
+  private terminateWSConnection(): void {
+    if (this.isWebSocketConnectionOpened() === true) {
+      this.wsConnection.terminate();
+      this.wsConnection = null;
     }
-    this.wsConnection = new WebSocket(this.wsConnectionUrl, protocol, options);
-    logger.info(
-      this.logPrefix() + ' Open OCPP connection to URL ' + this.wsConnectionUrl.toString()
-    );
   }
 
   private stopMeterValues(connectorId: number) {
@@ -2186,24 +1951,20 @@ export default class ChargingStation {
     }
   }
 
-  private getReconnectExponentialDelay(): boolean | undefined {
+  private getReconnectExponentialDelay(): boolean {
     return !Utils.isUndefined(this.stationInfo.reconnectExponentialDelay)
       ? this.stationInfo.reconnectExponentialDelay
       : false;
   }
 
-  private async reconnect(code: number): Promise<void> {
+  private async reconnect(): Promise<void> {
     // Stop WebSocket ping
     this.stopWebSocketPing();
     // Stop heartbeat
     this.stopHeartbeat();
     // Stop the ATG if needed
-    if (
-      this.stationInfo.AutomaticTransactionGenerator.enable &&
-      this.stationInfo.AutomaticTransactionGenerator.stopOnConnectionFailure &&
-      this.automaticTransactionGenerator?.started
-    ) {
-      this.automaticTransactionGenerator.stop();
+    if (this.automaticTransactionGenerator?.configuration?.stopOnConnectionFailure === true) {
+      this.stopAutomaticTransactionGenerator();
     }
     if (
       this.autoReconnectRetryCount < this.getAutoReconnectMaxRetries() ||
@@ -2213,33 +1974,39 @@ export default class ChargingStation {
       const reconnectDelay = this.getReconnectExponentialDelay()
         ? Utils.exponentialDelay(this.autoReconnectRetryCount)
         : this.getConnectionTimeout() * 1000;
-      const reconnectTimeout = reconnectDelay - 100 > 0 && reconnectDelay;
+      const reconnectDelayWithdraw = 1000;
+      const reconnectTimeout =
+        reconnectDelay && reconnectDelay - reconnectDelayWithdraw > 0
+          ? reconnectDelay - reconnectDelayWithdraw
+          : 0;
       logger.error(
-        `${this.logPrefix()} WebSocket: connection retry in ${Utils.roundTo(
+        `${this.logPrefix()} WebSocket connection retry in ${Utils.roundTo(
           reconnectDelay,
           2
         )}ms, timeout ${reconnectTimeout}ms`
       );
       await Utils.sleep(reconnectDelay);
       logger.error(
-        this.logPrefix() +
-          ' WebSocket: reconnecting try #' +
-          this.autoReconnectRetryCount.toString()
+        this.logPrefix() + ' WebSocket connection retry #' + this.autoReconnectRetryCount.toString()
       );
       this.openWSConnection(
-        { ...this.stationInfo.wsOptions, handshakeTimeout: reconnectTimeout },
-        true
+        { ...(this.stationInfo?.wsOptions ?? {}), handshakeTimeout: reconnectTimeout },
+        { closeOpened: true }
       );
       this.wsConnectionRestarted = true;
     } else if (this.getAutoReconnectMaxRetries() !== -1) {
       logger.error(
-        `${this.logPrefix()} WebSocket reconnect failure: maximum retries reached (${
+        `${this.logPrefix()} WebSocket connection retries failure: maximum retries reached (${
           this.autoReconnectRetryCount
-        }) or retry disabled (${this.getAutoReconnectMaxRetries()})`
+        }) or retries disabled (${this.getAutoReconnectMaxRetries()})`
       );
     }
   }
 
+  private getAutomaticTransactionGeneratorConfigurationFromTemplate(): AutomaticTransactionGeneratorConfiguration | null {
+    return this.getTemplateFromFile()?.AutomaticTransactionGenerator ?? null;
+  }
+
   private initializeConnectorStatus(connectorId: number): void {
     this.getConnectorStatus(connectorId).idTagLocalAuthorized = false;
     this.getConnectorStatus(connectorId).idTagAuthorized = false;