Add amperage limitation support via vendor specific OCPP key
[e-mobility-charging-stations-simulator.git] / src / charging-station / ChargingStation.ts
index d9840987864e1129806a98a36db735b087b3ab5c..5f5de2dc7b5b84334aaf2dfe0fe021cf9872ecc4 100644 (file)
@@ -1,5 +1,6 @@
 // Partial Copyright Jerome Benoit. 2021. All Rights Reserved.
 
+import { ACElectricUtils, DCElectricUtils } from '../utils/ElectricUtils';
 import {
   AvailabilityType,
   BootNotificationRequest,
@@ -15,13 +16,16 @@ import {
   RegistrationStatus,
   StatusNotificationResponse,
 } from '../types/ocpp/Responses';
-import ChargingStationConfiguration, {
+import ChargingStationConfiguration, { Section } from '../types/ChargingStationConfiguration';
+import ChargingStationOcppConfiguration, {
   ConfigurationKey,
-} from '../types/ChargingStationConfiguration';
+} from '../types/ChargingStationOcppConfiguration';
 import ChargingStationTemplate, {
+  AmpereUnits,
   CurrentType,
   PowerUnits,
   Voltage,
+  WsOptions,
 } from '../types/ChargingStationTemplate';
 import {
   ConnectorPhaseRotation,
@@ -32,7 +36,7 @@ import {
 import { MeterValue, MeterValueMeasurand, MeterValuePhase } from '../types/ocpp/MeterValues';
 import { StopTransactionReason, StopTransactionResponse } from '../types/ocpp/Transaction';
 import { WSError, WebSocketCloseEventStatusCode } from '../types/WebSocket';
-import WebSocket, { ClientOptions, Data, OPEN, RawData } from 'ws';
+import WebSocket, { Data, OPEN, RawData } from 'ws';
 
 import AutomaticTransactionGenerator from './AutomaticTransactionGenerator';
 import { ChargePointErrorCode } from '../types/ocpp/ChargePointErrorCode';
@@ -40,7 +44,6 @@ import { ChargePointStatus } from '../types/ocpp/ChargePointStatus';
 import { ChargingProfile } from '../types/ocpp/ChargingProfile';
 import ChargingStationInfo from '../types/ChargingStationInfo';
 import { ChargingStationWorkerMessageEvents } from '../types/ChargingStationWorker';
-import { ClientRequestArgs } from 'http';
 import Configuration from '../utils/Configuration';
 import { ConnectorStatus } from '../types/ConnectorStatus';
 import Constants from '../utils/Constants';
@@ -70,11 +73,11 @@ import path from 'path';
 
 export default class ChargingStation {
   public hashId!: string;
-  public readonly stationTemplateFile: string;
+  public readonly templateFile: string;
   public authorizedTags: string[];
   public stationInfo!: ChargingStationInfo;
   public readonly connectors: Map<number, ConnectorStatus>;
-  public configuration!: ChargingStationConfiguration;
+  public ocppConfiguration!: ChargingStationOcppConfiguration;
   public wsConnection!: WebSocket;
   public readonly requests: Map<string, CachedRequest>;
   public performanceStatistics!: PerformanceStatistics;
@@ -94,9 +97,9 @@ export default class ChargingStation {
   private automaticTransactionGenerator!: AutomaticTransactionGenerator;
   private webSocketPingSetInterval!: NodeJS.Timeout;
 
-  constructor(index: number, stationTemplateFile: string) {
+  constructor(index: number, templateFile: string) {
     this.index = index;
-    this.stationTemplateFile = stationTemplateFile;
+    this.templateFile = templateFile;
     this.stopped = false;
     this.wsConnectionRestarted = false;
     this.autoReconnectRetryCount = 0;
@@ -209,7 +212,7 @@ export default class ChargingStation {
 
   public getVoltageOut(): number | undefined {
     const errMsg = `${this.logPrefix()} Unknown ${this.getCurrentOutType()} currentOutType in template file ${
-      this.stationTemplateFile
+      this.templateFile
     }, cannot define default voltage out`;
     let defaultVoltageOut: number;
     switch (this.getCurrentOutType()) {
@@ -228,6 +231,22 @@ export default class ChargingStation {
       : defaultVoltageOut;
   }
 
+  public getMaximumConfiguredPower(): number | undefined {
+    let maximumConfiguredPower =
+      (this.stationInfo['maxPower'] as number) ?? this.stationInfo.maximumPower;
+    if (this.getAmperageLimitation() < this.stationInfo.maximumAmperage) {
+      maximumConfiguredPower =
+        this.getCurrentOutType() === CurrentType.AC
+          ? ACElectricUtils.powerTotal(
+              this.getNumberOfPhases(),
+              this.getVoltageOut(),
+              this.getAmperageLimitation()
+            )
+          : DCElectricUtils.power(this.getVoltageOut(), this.getAmperageLimitation());
+    }
+    return maximumConfiguredPower;
+  }
+
   public getTransactionIdTag(transactionId: number): string | undefined {
     for (const connectorId of this.connectors.keys()) {
       if (connectorId > 0 && this.getConnectorStatus(connectorId).transactionId === transactionId) {
@@ -511,14 +530,14 @@ export default class ChargingStation {
     FileUtils.watchJsonFile(
       this.logPrefix(),
       FileType.ChargingStationTemplate,
-      this.stationTemplateFile,
+      this.templateFile,
       null,
       (event, filename): void => {
         if (filename && event === 'change') {
           try {
             logger.debug(
               `${this.logPrefix()} ${FileType.ChargingStationTemplate} ${
-                this.stationTemplateFile
+                this.templateFile
               } file have changed, reload`
             );
             // Initialize
@@ -607,7 +626,7 @@ export default class ChargingStation {
     key: string | StandardParametersKey,
     caseInsensitive = false
   ): ConfigurationKey | undefined {
-    return this.configuration.configurationKey.find((configElement) => {
+    return this.ocppConfiguration.configurationKey.find((configElement) => {
       if (caseInsensitive) {
         return configElement.key.toLowerCase() === key.toLowerCase();
       }
@@ -625,30 +644,24 @@ export default class ChargingStation {
     },
     params: { overwrite?: boolean; save?: boolean } = { overwrite: false, save: false }
   ): void {
-    if (!options || Utils.isEmptyObject(options)) {
-      options = {
-        readonly: false,
-        visible: true,
-        reboot: false,
-      };
-    }
-    const readonly = options.readonly ?? false;
-    const visible = options.visible ?? true;
-    const reboot = options.reboot ?? false;
+    options = options ?? ({} as { readonly?: boolean; visible?: boolean; reboot?: boolean });
+    options.readonly = options?.readonly ?? false;
+    options.visible = options?.visible ?? true;
+    options.reboot = options?.reboot ?? false;
     let keyFound = this.getConfigurationKey(key);
     if (keyFound && params?.overwrite) {
       this.deleteConfigurationKey(keyFound.key, { save: false });
       keyFound = undefined;
     }
     if (!keyFound) {
-      this.configuration.configurationKey.push({
+      this.ocppConfiguration.configurationKey.push({
         key,
-        readonly,
+        readonly: options.readonly,
         value,
-        visible,
-        reboot,
+        visible: options.visible,
+        reboot: options.reboot,
       });
-      params?.save && this.saveConfiguration();
+      params?.save && this.saveOcppConfiguration();
     } else {
       logger.error(
         `${this.logPrefix()} Trying to add an already existing configuration key: %j`,
@@ -664,9 +677,10 @@ export default class ChargingStation {
   ): void {
     const keyFound = this.getConfigurationKey(key, caseInsensitive);
     if (keyFound) {
-      const keyIndex = this.configuration.configurationKey.indexOf(keyFound);
-      this.configuration.configurationKey[keyIndex].value = value;
-      this.saveConfiguration();
+      this.ocppConfiguration.configurationKey[
+        this.ocppConfiguration.configurationKey.indexOf(keyFound)
+      ].value = value;
+      this.saveOcppConfiguration();
     } else {
       logger.error(
         `${this.logPrefix()} Trying to set a value on a non existing configuration key: %j`,
@@ -681,11 +695,11 @@ export default class ChargingStation {
   ): ConfigurationKey[] {
     const keyFound = this.getConfigurationKey(key, params?.caseInsensitive);
     if (keyFound) {
-      const deletedConfigurationKey = this.configuration.configurationKey.splice(
-        this.configuration.configurationKey.indexOf(keyFound),
+      const deletedConfigurationKey = this.ocppConfiguration.configurationKey.splice(
+        this.ocppConfiguration.configurationKey.indexOf(keyFound),
         1
       );
-      params?.save && this.saveConfiguration();
+      params?.save && this.saveOcppConfiguration();
       return deletedConfigurationKey;
     }
   }
@@ -759,57 +773,131 @@ export default class ChargingStation {
           idSuffix;
   }
 
-  private buildStationInfo(): ChargingStationInfo {
-    let stationTemplateFromFile: ChargingStationTemplate;
+  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 {
-      // Load template file
-      stationTemplateFromFile = JSON.parse(
-        fs.readFileSync(this.stationTemplateFile, 'utf8')
-      ) as ChargingStationTemplate;
+      const measureId = `${FileType.ChargingStationTemplate} read`;
+      const beginId = PerformanceStatistics.beginMeasure(measureId);
+      template = JSON.parse(fs.readFileSync(this.templateFile, 'utf8')) as ChargingStationTemplate;
+      PerformanceStatistics.endMeasure(measureId, beginId);
     } catch (error) {
       FileUtils.handleFileException(
         this.logPrefix(),
         FileType.ChargingStationTemplate,
-        this.stationTemplateFile,
+        this.templateFile,
         error as NodeJS.ErrnoException
       );
     }
-    const chargingStationId = this.getChargingStationId(stationTemplateFromFile);
+    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 (existingStationInfo) {
+      existingStationInfo?.chargePointSerialNumber &&
+        (stationInfo.chargePointSerialNumber = existingStationInfo.chargePointSerialNumber);
+      existingStationInfo?.chargeBoxSerialNumber &&
+        (stationInfo.chargeBoxSerialNumber = existingStationInfo.chargeBoxSerialNumber);
+    } else {
+      const serialNumberSuffix = params?.randomSerialNumber
+        ? this.getRandomSerialNumberSuffix({ upperCase: params.randomSerialNumberUpperCase })
+        : '';
+      stationInfo.chargePointSerialNumber =
+        stationInfo?.chargePointSerialNumberPrefix &&
+        stationInfo.chargePointSerialNumberPrefix + serialNumberSuffix;
+      stationInfo.chargeBoxSerialNumber =
+        stationInfo?.chargeBoxSerialNumberPrefix &&
+        stationInfo.chargeBoxSerialNumberPrefix + serialNumberSuffix;
+    }
+  }
+
+  private getStationInfoFromTemplate(): ChargingStationInfo {
+    const stationInfo: ChargingStationInfo =
+      this.getTemplateFromFile() ?? ({} as ChargingStationInfo);
+    stationInfo.hash = crypto
+      .createHash(Constants.DEFAULT_HASH_ALGORITHM)
+      .update(JSON.stringify(stationInfo))
+      .digest('hex');
+    const chargingStationId = this.getChargingStationId(stationInfo);
     // Deprecation template keys section
     this.warnDeprecatedTemplateKey(
-      stationTemplateFromFile,
+      stationInfo,
       'supervisionUrl',
       chargingStationId,
       "Use 'supervisionUrls' instead"
     );
-    this.convertDeprecatedTemplateKey(stationTemplateFromFile, 'supervisionUrl', 'supervisionUrls');
-    const stationInfo: ChargingStationInfo = stationTemplateFromFile ?? ({} as ChargingStationInfo);
-    stationInfo.wsOptions = stationTemplateFromFile?.wsOptions ?? {};
-    if (!Utils.isEmptyArray(stationTemplateFromFile.power)) {
-      stationTemplateFromFile.power = stationTemplateFromFile.power as number[];
-      const powerArrayRandomIndex = Math.floor(
-        Utils.secureRandom() * stationTemplateFromFile.power.length
-      );
-      stationInfo.maxPower =
-        stationTemplateFromFile.powerUnit === PowerUnits.KILO_WATT
-          ? stationTemplateFromFile.power[powerArrayRandomIndex] * 1000
-          : stationTemplateFromFile.power[powerArrayRandomIndex];
+    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);
+      stationInfo.maximumPower =
+        stationInfo.powerUnit === PowerUnits.KILO_WATT
+          ? stationInfo.power[powerArrayRandomIndex] * 1000
+          : stationInfo.power[powerArrayRandomIndex];
     } else {
-      stationTemplateFromFile.power = stationTemplateFromFile.power as number;
-      stationInfo.maxPower =
-        stationTemplateFromFile.powerUnit === PowerUnits.KILO_WATT
-          ? stationTemplateFromFile.power * 1000
-          : stationTemplateFromFile.power;
+      stationInfo.power = stationInfo.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 = stationTemplateFromFile.resetTime
-      ? stationTemplateFromFile.resetTime * 1000
+    stationInfo.resetTime = stationInfo.resetTime
+      ? stationInfo.resetTime * 1000
       : Constants.CHARGING_STATION_DEFAULT_RESET_TIME;
     return stationInfo;
   }
 
+  private getStationInfoFromFile(): ChargingStationInfo | null {
+    return this.getConfigurationFromFile()?.stationInfo ?? null;
+  }
+
+  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();
+    if (stationInfoFromFile?.hash === stationInfoFromTemplate.hash) {
+      return stationInfoFromFile;
+    }
+    this.createSerialNumber(stationInfoFromTemplate, stationInfoFromFile);
+    return stationInfoFromTemplate;
+  }
+
+  private saveStationInfo(): void {
+    this.saveConfiguration(Section.stationInfo);
+  }
+
   private getOcppVersion(): OCPPVersion {
     return this.stationInfo.ocppVersion ? this.stationInfo.ocppVersion : OCPPVersion.VERSION_16;
   }
@@ -820,55 +908,76 @@ export default class ChargingStation {
 
   private handleUnsupportedVersion(version: OCPPVersion) {
     const errMsg = `${this.logPrefix()} Unsupported protocol version '${version}' configured in template file ${
-      this.stationTemplateFile
+      this.templateFile
     }`;
     logger.error(errMsg);
     throw new Error(errMsg);
   }
 
-  private initialize(): void {
-    this.stationInfo = this.buildStationInfo();
-    this.bootNotificationRequest = {
-      chargePointModel: this.stationInfo.chargePointModel,
-      chargePointVendor: this.stationInfo.chargePointVendor,
-      ...(!Utils.isUndefined(this.stationInfo.chargeBoxSerialNumberPrefix) && {
-        chargeBoxSerialNumber: this.stationInfo.chargeBoxSerialNumberPrefix,
+  private createBootNotificationRequest(stationInfo: ChargingStationInfo): BootNotificationRequest {
+    return {
+      chargePointModel: stationInfo.chargePointModel,
+      chargePointVendor: stationInfo.chargePointVendor,
+      ...(!Utils.isUndefined(stationInfo.chargeBoxSerialNumber) && {
+        chargeBoxSerialNumber: stationInfo.chargeBoxSerialNumber,
       }),
-      ...(!Utils.isUndefined(this.stationInfo.chargePointSerialNumberPrefix) && {
-        chargePointSerialNumber: this.stationInfo.chargePointSerialNumberPrefix,
+      ...(!Utils.isUndefined(stationInfo.chargePointSerialNumber) && {
+        chargePointSerialNumber: stationInfo.chargePointSerialNumber,
       }),
-      ...(!Utils.isUndefined(this.stationInfo.firmwareVersion) && {
-        firmwareVersion: this.stationInfo.firmwareVersion,
+      ...(!Utils.isUndefined(stationInfo.firmwareVersion) && {
+        firmwareVersion: stationInfo.firmwareVersion,
       }),
-      ...(!Utils.isUndefined(this.stationInfo.iccid) && { iccid: this.stationInfo.iccid }),
-      ...(!Utils.isUndefined(this.stationInfo.imsi) && { imsi: this.stationInfo.imsi }),
-      ...(!Utils.isUndefined(this.stationInfo.meterSerialNumber) && {
-        meterSerialNumber: this.stationInfo.meterSerialNumber,
+      ...(!Utils.isUndefined(stationInfo.iccid) && { iccid: stationInfo.iccid }),
+      ...(!Utils.isUndefined(stationInfo.imsi) && { imsi: stationInfo.imsi }),
+      ...(!Utils.isUndefined(stationInfo.meterSerialNumber) && {
+        meterSerialNumber: stationInfo.meterSerialNumber,
       }),
-      ...(!Utils.isUndefined(this.stationInfo.meterType) && {
-        meterType: this.stationInfo.meterType,
+      ...(!Utils.isUndefined(stationInfo.meterType) && {
+        meterType: stationInfo.meterType,
       }),
     };
+  }
 
-    this.hashId = crypto
+  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.meterSerialNumber) && {
+        meterSerialNumber: stationInfo.meterSerialNumber,
+      }),
+      ...(!Utils.isUndefined(stationInfo.meterType) && {
+        meterType: stationInfo.meterType,
+      }),
+    };
+    return crypto
       .createHash(Constants.DEFAULT_HASH_ALGORITHM)
-      .update(JSON.stringify(this.bootNotificationRequest) + this.stationInfo.chargingStationId)
+      .update(JSON.stringify(hashBootNotificationRequest) + stationInfo.chargingStationId)
       .digest('hex');
+  }
+
+  private initialize(): void {
+    this.stationInfo = this.getStationInfo();
     logger.info(`${this.logPrefix()} Charging station hashId '${this.hashId}'`);
-    this.configurationFile = path.join(
-      path.resolve(__dirname, '../'),
-      'assets',
-      'configurations',
-      this.hashId + '.json'
-    );
-    this.configuration = this.getConfiguration();
+    this.bootNotificationRequest = this.createBootNotificationRequest(this.stationInfo);
+    this.ocppConfiguration = this.getOcppConfiguration();
     delete this.stationInfo.Configuration;
     // Build connectors if needed
     const maxConnectors = this.getMaxNumberOfConnectors();
     if (maxConnectors <= 0) {
       logger.warn(
         `${this.logPrefix()} Charging station template ${
-          this.stationTemplateFile
+          this.templateFile
         } with ${maxConnectors} connectors`
       );
     }
@@ -876,14 +985,14 @@ export default class ChargingStation {
     if (templateMaxConnectors <= 0) {
       logger.warn(
         `${this.logPrefix()} Charging station template ${
-          this.stationTemplateFile
+          this.templateFile
         } with no connector configuration`
       );
     }
     if (!this.stationInfo.Connectors[0]) {
       logger.warn(
         `${this.logPrefix()} Charging station template ${
-          this.stationTemplateFile
+          this.templateFile
         } with no connector Id 0 configuration`
       );
     }
@@ -895,7 +1004,7 @@ export default class ChargingStation {
     ) {
       logger.warn(
         `${this.logPrefix()} Number of connectors exceeds the number of connector configurations in template ${
-          this.stationTemplateFile
+          this.templateFile
         }, forcing random connector configurations affectation`
       );
       this.stationInfo.randomConnectors = true;
@@ -947,7 +1056,10 @@ export default class ChargingStation {
         }
       }
     }
-    // Avoid duplication of connectors related information
+    // The connectors attribute need to be initialized
+    this.stationInfo.maximumAmperage = this.getMaximumAmperage();
+    this.saveStationInfo();
+    // Avoid duplication of connectors related information in RAM
     delete this.stationInfo.Connectors;
     // Initialize transaction attributes on connectors
     for (const connectorId of this.connectors.keys()) {
@@ -958,8 +1070,8 @@ export default class ChargingStation {
     this.wsConfiguredConnectionUrl = new URL(
       this.getConfiguredSupervisionUrl().href + '/' + this.stationInfo.chargingStationId
     );
-    // OCPP parameters
-    this.initOcppParameters();
+    // OCPP configuration
+    this.initializeOcppConfiguration();
     switch (this.getOcppVersion()) {
       case OCPPVersion.VERSION_16:
         this.ocppIncomingRequestService =
@@ -990,7 +1102,7 @@ export default class ChargingStation {
     }
   }
 
-  private initOcppParameters(): void {
+  private initializeOcppConfiguration(): void {
     if (
       this.getSupervisionUrlOcppConfiguration() &&
       !this.getConfigurationKey(this.getSupervisionUrlOcppKey())
@@ -1006,6 +1118,15 @@ export default class ChargingStation {
     ) {
       this.deleteConfigurationKey(this.getSupervisionUrlOcppKey(), { save: false });
     }
+    if (
+      this.stationInfo.amperageLimitationOcppKey &&
+      !this.getConfigurationKey(this.stationInfo.amperageLimitationOcppKey)
+    ) {
+      this.addConfigurationKey(
+        this.stationInfo.amperageLimitationOcppKey,
+        (this.stationInfo.maximumAmperage * this.getAmperageLimitationUnitDivider()).toString()
+      );
+    }
     if (!this.getConfigurationKey(StandardParametersKey.SupportedFeatureProfiles)) {
       this.addConfigurationKey(
         StandardParametersKey.SupportedFeatureProfiles,
@@ -1061,24 +1182,21 @@ export default class ChargingStation {
         Constants.DEFAULT_CONNECTION_TIMEOUT.toString()
       );
     }
-    this.saveConfiguration();
-  }
-
-  private getConfigurationFromTemplate(): ChargingStationConfiguration {
-    return this.stationInfo.Configuration ?? ({} as ChargingStationConfiguration);
+    this.saveOcppConfiguration();
   }
 
   private getConfigurationFromFile(): ChargingStationConfiguration | null {
     let configuration: ChargingStationConfiguration = null;
-    if (
-      this.getOcppPersistentConfiguration() &&
-      this.configurationFile &&
-      fs.existsSync(this.configurationFile)
-    ) {
+    if (this.configurationFile && fs.existsSync(this.configurationFile)) {
       try {
+        const measureId = `${FileType.ChargingStationConfiguration} read`;
+        const beginId = PerformanceStatistics.beginMeasure(
+          `${FileType.ChargingStationConfiguration} read`
+        );
         configuration = JSON.parse(
           fs.readFileSync(this.configurationFile, 'utf8')
         ) as ChargingStationConfiguration;
+        PerformanceStatistics.endMeasure(measureId, beginId);
       } catch (error) {
         FileUtils.handleFileException(
           this.logPrefix(),
@@ -1091,40 +1209,75 @@ export default class ChargingStation {
     return configuration;
   }
 
-  private saveConfiguration(): void {
-    if (this.getOcppPersistentConfiguration()) {
-      if (this.configurationFile) {
-        try {
-          if (!fs.existsSync(path.dirname(this.configurationFile))) {
-            fs.mkdirSync(path.dirname(this.configurationFile), { recursive: true });
-          }
-          const fileDescriptor = fs.openSync(this.configurationFile, 'w');
-          fs.writeFileSync(fileDescriptor, JSON.stringify(this.configuration, null, 2));
-          fs.closeSync(fileDescriptor);
-        } catch (error) {
-          FileUtils.handleFileException(
-            this.logPrefix(),
-            FileType.ChargingStationConfiguration,
-            this.configurationFile,
-            error as NodeJS.ErrnoException
-          );
+  private saveConfiguration(section?: Section): 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 });
         }
-      } else {
-        logger.error(
-          `${this.logPrefix()} Trying to save charging station configuration to undefined file`
+        switch (section) {
+          case Section.ocppConfiguration:
+            configurationData.configurationKey = this.ocppConfiguration.configurationKey;
+            break;
+          case Section.stationInfo:
+            configurationData.stationInfo = this.stationInfo;
+            break;
+          default:
+            configurationData.configurationKey = this.ocppConfiguration.configurationKey;
+            configurationData.stationInfo = this.stationInfo;
+            break;
+        }
+        const measureId = `${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(),
+          FileType.ChargingStationConfiguration,
+          this.configurationFile,
+          error as NodeJS.ErrnoException
         );
       }
+    } else {
+      logger.error(
+        `${this.logPrefix()} Trying to save charging station configuration to undefined file`
+      );
     }
   }
 
-  private getConfiguration(): ChargingStationConfiguration {
-    let configuration: ChargingStationConfiguration = this.getConfigurationFromFile();
-    if (!configuration) {
-      configuration = this.getConfigurationFromTemplate();
+  private getOcppConfigurationFromTemplate(): ChargingStationOcppConfiguration {
+    return this.getTemplateFromFile().Configuration ?? ({} as ChargingStationOcppConfiguration);
+  }
+
+  private getOcppConfigurationFromFile(): ChargingStationOcppConfiguration | null {
+    let configuration: ChargingStationConfiguration = null;
+    if (this.getOcppPersistentConfiguration()) {
+      const configurationFromFile = this.getConfigurationFromFile();
+      configuration = configurationFromFile?.configurationKey && configurationFromFile;
     }
+    configuration && delete configuration.stationInfo;
     return configuration;
   }
 
+  private getOcppConfiguration(): ChargingStationOcppConfiguration {
+    let ocppConfiguration: ChargingStationOcppConfiguration = this.getOcppConfigurationFromFile();
+    if (!ocppConfiguration) {
+      ocppConfiguration = this.getOcppConfigurationFromTemplate();
+    }
+    return ocppConfiguration;
+  }
+
+  private saveOcppConfiguration(): void {
+    if (this.getOcppPersistentConfiguration()) {
+      this.saveConfiguration(Section.ocppConfiguration);
+    }
+  }
+
   private async onOpen(): Promise<void> {
     logger.info(
       `${this.logPrefix()} Connected to OCPP server through ${this.wsConnectionUrl.toString()}`
@@ -1353,9 +1506,7 @@ export default class ChargingStation {
       }
     } else {
       logger.info(
-        this.logPrefix() +
-          ' No authorization file given in template file ' +
-          this.stationTemplateFile
+        this.logPrefix() + ' No authorization file given in template file ' + this.templateFile
       );
     }
     return authorizedTags;
@@ -1435,6 +1586,49 @@ export default class ChargingStation {
     return maxConnectors;
   }
 
+  private getMaximumAmperage(): number | undefined {
+    switch (this.getCurrentOutType()) {
+      case CurrentType.AC:
+        return ACElectricUtils.amperagePerPhaseFromPower(
+          this.getNumberOfPhases(),
+          (this.stationInfo['maxPower'] as number) ??
+            this.stationInfo.maximumPower / this.getNumberOfConnectors(),
+          this.getVoltageOut()
+        );
+      case CurrentType.DC:
+        return DCElectricUtils.amperage(this.stationInfo.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 unitDivider;
+  }
+
+  private getAmperageLimitation(): number | undefined {
+    if (
+      this.stationInfo.amperageLimitationOcppKey &&
+      this.getConfigurationKey(this.stationInfo.amperageLimitationOcppKey)
+    ) {
+      return (
+        Utils.convertToInt(
+          this.getConfigurationKey(this.stationInfo.amperageLimitationOcppKey).value
+        ) / this.getAmperageLimitationUnitDivider()
+      );
+    }
+  }
+
   private async startMessageSequence(): Promise<void> {
     if (this.stationInfo.autoRegister) {
       await this.ocppRequestService.sendMessageHandler<BootNotificationResponse>(
@@ -1637,7 +1831,7 @@ export default class ChargingStation {
       const logPrefixStr = ` ${chargingStationId} |`;
       logger.warn(
         `${Utils.logPrefix(logPrefixStr)} Deprecated template key '${key}' usage in file '${
-          this.stationTemplateFile
+          this.templateFile
         }'${logMsgToAppend && '. ' + logMsgToAppend}`
       );
     }
@@ -1716,7 +1910,7 @@ export default class ChargingStation {
   }
 
   private openWSConnection(
-    options: ClientOptions & ClientRequestArgs = this.stationInfo.wsOptions,
+    options: WsOptions = this.stationInfo.wsOptions,
     forceCloseOpened = false
   ): void {
     options.handshakeTimeout = options?.handshakeTimeout ?? this.getConnectionTimeout() * 1000;