Uniformize log messages, take 2
[e-mobility-charging-stations-simulator.git] / src / charging-station / ChargingStation.ts
index 4e9abedf3fd9a6b8331079171ceb95958312c028..ff3b2601b8a7ba6ce9493272d06eb857a0db5109 100644 (file)
@@ -1,6 +1,42 @@
 // 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 ChargingStationTemplate, {
+  CurrentType,
+  PowerUnits,
+  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,
@@ -21,70 +57,38 @@ import {
   Response,
   StatusNotificationResponse,
 } from '../types/ocpp/Responses';
-import { ChargingProfile, ChargingRateUnitType } from '../types/ocpp/ChargingProfile';
-import ChargingStationTemplate, {
-  CurrentType,
-  PowerUnits,
-  WsOptions,
-} from '../types/ChargingStationTemplate';
-import {
-  ConnectorPhaseRotation,
-  StandardParametersKey,
-  SupportedFeatureProfiles,
-  VendorDefaultParametersKey,
-} from '../types/ocpp/Configuration';
-import { MeterValue, MeterValueMeasurand } 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 { AutomaticTransactionGeneratorConfiguration } from '../types/AutomaticTransactionGenerator';
-import BaseError from '../exception/BaseError';
-import { ChargePointErrorCode } from '../types/ocpp/ChargePointErrorCode';
-import { ChargePointStatus } from '../types/ocpp/ChargePointStatus';
-import { ChargingStationCache } from './ChargingStationCache';
-import ChargingStationConfiguration from '../types/ChargingStationConfiguration';
-import { ChargingStationConfigurationUtils } from './ChargingStationConfigurationUtils';
-import ChargingStationInfo from '../types/ChargingStationInfo';
-import ChargingStationOcppConfiguration from '../types/ChargingStationOcppConfiguration';
-import { ChargingStationUtils } from './ChargingStationUtils';
-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 { 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 templateFile: string;
-  public authorizedTags: string[];
+  public authorizedTagsCache: AuthorizedTagsCache;
   public stationInfo!: ChargingStationInfo;
+  public stopped: boolean;
   public readonly connectors: Map<number, ConnectorStatus>;
   public ocppConfiguration!: ChargingStationOcppConfiguration;
   public wsConnection!: WebSocket;
@@ -104,10 +108,11 @@ export default class ChargingStation {
   private configuredSupervisionUrl!: URL;
   private wsConnectionRestarted: boolean;
   private autoReconnectRetryCount: number;
-  private stopped: boolean;
-  private readonly cache: ChargingStationCache;
+  private templateFileWatcher!: fs.FSWatcher;
+  private readonly sharedLRUCache: SharedLRUCache;
   private automaticTransactionGenerator!: AutomaticTransactionGenerator;
   private webSocketPingSetInterval!: NodeJS.Timeout;
+  private readonly chargingStationWorkerBroadcastChannel: ChargingStationWorkerBroadcastChannel;
 
   constructor(index: number, templateFile: string) {
     this.index = index;
@@ -115,10 +120,13 @@ export default class ChargingStation {
     this.stopped = false;
     this.wsConnectionRestarted = false;
     this.autoReconnectRetryCount = 0;
-    this.cache = ChargingStationCache.getInstance();
+    this.sharedLRUCache = SharedLRUCache.getInstance();
+    this.authorizedTagsCache = AuthorizedTagsCache.getInstance();
     this.connectors = new Map<number, ConnectorStatus>();
     this.requests = new Map<string, CachedRequest>();
     this.messageBuffer = new Set<string>();
+    this.chargingStationWorkerBroadcastChannel = new ChargingStationWorkerBroadcastChannel(this);
+
     this.initialize();
   }
 
@@ -149,12 +157,19 @@ export default class ChargingStation {
   }
 
   public getRandomIdTag(): string {
-    const index = Math.floor(Utils.secureRandom() * this.authorizedTags.length);
-    return this.authorizedTags[index];
+    const authorizationFile = ChargingStationUtils.getAuthorizationFile(this.stationInfo);
+    const index = Math.floor(
+      Utils.secureRandom() * this.authorizedTagsCache.getAuthorizedTags(authorizationFile).length
+    );
+    return this.authorizedTagsCache.getAuthorizedTags(authorizationFile)[index];
   }
 
   public hasAuthorizedTags(): boolean {
-    return !Utils.isEmptyArray(this.authorizedTags);
+    return !Utils.isEmptyArray(
+      this.authorizedTagsCache.getAuthorizedTags(
+        ChargingStationUtils.getAuthorizationFile(this.stationInfo)
+      )
+    );
   }
 
   public getEnableStatistics(): boolean | undefined {
@@ -167,6 +182,10 @@ export default class ChargingStation {
     return this.stationInfo.mayAuthorizeAtRemoteStart ?? true;
   }
 
+  public getPayloadSchemaValidation(): boolean | undefined {
+    return this.stationInfo.payloadSchemaValidation ?? true;
+  }
+
   public getNumberOfPhases(stationInfo?: ChargingStationInfo): number | undefined {
     const localStationInfo: ChargingStationInfo = stationInfo ?? this.stationInfo;
     switch (this.getCurrentOutType(stationInfo)) {
@@ -180,7 +199,7 @@ export default class ChargingStation {
   }
 
   public isWebSocketConnectionOpened(): boolean {
-    return this?.wsConnection?.readyState === OPEN;
+    return this?.wsConnection?.readyState === WebSocket.OPEN;
   }
 
   public getRegistrationStatus(): RegistrationStatus {
@@ -317,22 +336,22 @@ export default class ChargingStation {
     }
   }
 
-  public getEnergyActiveImportRegisterByTransactionId(transactionId: number): number | undefined {
+  public getEnergyActiveImportRegisterByTransactionId(transactionId: number): number {
     const transactionConnectorStatus = this.getConnectorStatus(
       this.getConnectorIdByTransactionId(transactionId)
     );
     if (this.getMeteringPerTransaction()) {
-      return transactionConnectorStatus?.transactionEnergyActiveImportRegisterValue;
+      return transactionConnectorStatus?.transactionEnergyActiveImportRegisterValue ?? 0;
     }
-    return transactionConnectorStatus?.energyActiveImportRegisterValue;
+    return transactionConnectorStatus?.energyActiveImportRegisterValue ?? 0;
   }
 
-  public getEnergyActiveImportRegisterByConnectorId(connectorId: number): number | undefined {
+  public getEnergyActiveImportRegisterByConnectorId(connectorId: number): number {
     const connectorStatus = this.getConnectorStatus(connectorId);
     if (this.getMeteringPerTransaction()) {
-      return connectorStatus?.transactionEnergyActiveImportRegisterValue;
+      return connectorStatus?.transactionEnergyActiveImportRegisterValue ?? 0;
     }
-    return connectorStatus?.energyActiveImportRegisterValue;
+    return connectorStatus?.energyActiveImportRegisterValue ?? 0;
   }
 
   public getAuthorizeRemoteTxRequests(): boolean {
@@ -469,36 +488,8 @@ export default class ChargingStation {
       this.performanceStatistics.start();
     }
     this.openWSConnection();
-    // Handle WebSocket message
-    this.wsConnection.on(
-      'message',
-      this.onMessage.bind(this) as (this: WebSocket, data: RawData, isBinary: boolean) => void
-    );
-    // Handle WebSocket error
-    this.wsConnection.on(
-      'error',
-      this.onError.bind(this) as (this: WebSocket, error: Error) => void
-    );
-    // Handle WebSocket close
-    this.wsConnection.on(
-      'close',
-      this.onClose.bind(this) as (this: WebSocket, code: number, reason: Buffer) => void
-    );
-    // Handle WebSocket open
-    this.wsConnection.on('open', this.onOpen.bind(this) as (this: WebSocket) => void);
-    // Handle WebSocket ping
-    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,
-      ChargingStationUtils.getAuthorizationFile(this.stationInfo),
-      this.authorizedTags
-    );
     // Monitor charging station template file
-    FileUtils.watchJsonFile(
+    this.templateFileWatcher = FileUtils.watchJsonFile(
       this.logPrefix(),
       FileType.ChargingStationTemplate,
       this.templateFile,
@@ -511,7 +502,7 @@ export default class ChargingStation {
                 this.templateFile
               } file have changed, reload`
             );
-            this.cache.deleteChargingStationTemplate(this.stationInfo?.templateHash);
+            this.sharedLRUCache.deleteChargingStationTemplate(this.stationInfo?.templateHash);
             // Initialize
             this.initialize();
             // Restart the ATG
@@ -525,17 +516,14 @@ export default class ChargingStation {
             // FIXME?: restart heartbeat and WebSocket ping when their interval values have changed
           } catch (error) {
             logger.error(
-              `${this.logPrefix()} ${FileType.ChargingStationTemplate} file monitoring error: %j`,
+              `${this.logPrefix()} ${FileType.ChargingStationTemplate} file monitoring error:`,
               error
             );
           }
         }
       }
     );
-    parentPort.postMessage({
-      id: ChargingStationWorkerMessageEvents.STARTED,
-      data: { id: this.stationInfo.chargingStationId },
-    });
+    parentPort.postMessage(MessageChannelUtils.buildStartedMessage(this));
   }
 
   public async stop(reason: StopTransactionReason = StopTransactionReason.NONE): Promise<void> {
@@ -554,20 +542,16 @@ export default class ChargingStation {
         this.getConnectorStatus(connectorId).status = ChargePointStatus.UNAVAILABLE;
       }
     }
-    if (this.isWebSocketConnectionOpened()) {
-      this.wsConnection.close();
-    }
+    this.closeWSConnection();
     if (this.getEnableStatistics()) {
       this.performanceStatistics.stop();
     }
-    this.cache.deleteChargingStationConfiguration(this.configurationFileHash);
-    this.cache.deleteChargingStationTemplate(this.stationInfo?.templateHash);
+    this.sharedLRUCache.deleteChargingStationConfiguration(this.configurationFileHash);
+    this.templateFileWatcher.close();
+    this.sharedLRUCache.deleteChargingStationTemplate(this.stationInfo?.templateHash);
     this.bootNotificationResponse = null;
-    parentPort.postMessage({
-      id: ChargingStationWorkerMessageEvents.STOPPED,
-      data: { id: this.stationInfo.chargingStationId },
-    });
     this.stopped = true;
+    parentPort.postMessage(MessageChannelUtils.buildStoppedMessage(this));
   }
 
   public async reset(reason?: StopTransactionReason): Promise<void> {
@@ -599,7 +583,7 @@ export default class ChargingStation {
     if (!Utils.isEmptyArray(chargingProfiles)) {
       const result = ChargingStationUtils.getLimitFromChargingProfiles(
         chargingProfiles,
-        Utils.logPrefix()
+        this.logPrefix()
       );
       if (!Utils.isNullOrUndefined(result)) {
         limit = result.limit;
@@ -642,7 +626,7 @@ export default class ChargingStation {
       );
       this.getConnectorStatus(connectorId).chargingProfiles = [];
     }
-    if (!Array.isArray(this.getConnectorStatus(connectorId).chargingProfiles)) {
+    if (Array.isArray(this.getConnectorStatus(connectorId).chargingProfiles) === false) {
       logger.error(
         `${this.logPrefix()} Trying to set a charging profile on connectorId ${connectorId} with an improper attribute type for the charging profiles array, applying proper type initialization`
       );
@@ -691,6 +675,74 @@ export default class ChargingStation {
     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();
+    }
+    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;
+    }
+
+    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',
+      this.onMessage.bind(this) as (this: WebSocket, data: RawData, isBinary: boolean) => void
+    );
+    // Handle WebSocket error
+    this.wsConnection.on(
+      'error',
+      this.onError.bind(this) as (this: WebSocket, error: Error) => void
+    );
+    // Handle WebSocket close
+    this.wsConnection.on(
+      'close',
+      this.onClose.bind(this) as (this: WebSocket, code: number, reason: Buffer) => void
+    );
+    // Handle WebSocket open
+    this.wsConnection.on('open', this.onOpen.bind(this) as (this: WebSocket) => void);
+    // Handle WebSocket ping
+    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);
+  }
+
+  public closeWSConnection(): void {
+    if (this.isWebSocketConnectionOpened()) {
+      this.wsConnection.close();
+      this.wsConnection = null;
+    }
+  }
+
   private flushMessageBuffer() {
     if (this.messageBuffer.size > 0) {
       this.messageBuffer.forEach((message) => {
@@ -712,8 +764,8 @@ export default class ChargingStation {
   private getTemplateFromFile(): ChargingStationTemplate | null {
     let template: ChargingStationTemplate = null;
     try {
-      if (this.cache.hasChargingStationTemplate(this.stationInfo?.templateHash)) {
-        template = this.cache.getChargingStationTemplate(this.stationInfo.templateHash);
+      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);
@@ -725,7 +777,7 @@ export default class ChargingStation {
           .createHash(Constants.DEFAULT_HASH_ALGORITHM)
           .update(JSON.stringify(template))
           .digest('hex');
-        this.cache.setChargingStationTemplate(template);
+        this.sharedLRUCache.setChargingStationTemplate(template);
       }
     } catch (error) {
       FileUtils.handleFileException(
@@ -794,14 +846,14 @@ export default class ChargingStation {
     ChargingStationUtils.checkConfiguredMaxConnectors(
       configuredMaxConnectors,
       this.templateFile,
-      Utils.logPrefix()
+      this.logPrefix()
     );
     const templateMaxConnectors =
       ChargingStationUtils.getTemplateMaxNumberOfConnectors(stationTemplate);
     ChargingStationUtils.checkTemplateMaxConnectors(
       templateMaxConnectors,
       this.templateFile,
-      Utils.logPrefix()
+      this.logPrefix()
     );
     if (
       configuredMaxConnectors >
@@ -868,20 +920,16 @@ export default class ChargingStation {
   }
 
   private handleUnsupportedVersion(version: OCPPVersion) {
-    const errMsg = `${this.logPrefix()} Unsupported protocol version '${version}' configured in template file ${
-      this.templateFile
-    }`;
-    logger.error(errMsg);
-    throw new Error(errMsg);
+    const errMsg = `Unsupported protocol version '${version}' configured in template file ${this.templateFile}`;
+    logger.error(`${this.logPrefix()} ${errMsg}`);
+    throw new BaseError(errMsg);
   }
 
   private initialize(): void {
     this.hashId = ChargingStationUtils.getHashId(this.index, this.getTemplateFromFile());
     logger.info(`${this.logPrefix()} Charging station hashId '${this.hashId}'`);
     this.configurationFile = path.join(
-      path.resolve(__dirname, '../'),
-      'assets',
-      'configurations',
+      path.dirname(this.templateFile.replace('station-templates', 'configurations')),
       this.hashId + '.json'
     );
     this.stationInfo = this.getStationInfo();
@@ -899,11 +947,6 @@ export default class ChargingStation {
     this.bootNotificationRequest = ChargingStationUtils.createBootNotificationRequest(
       this.stationInfo
     );
-    this.authorizedTags = ChargingStationUtils.getAuthorizedTags(
-      this.stationInfo,
-      this.templateFile,
-      this.logPrefix()
-    );
     this.powerDivider = this.getPowerDivider();
     // OCPP configuration
     this.ocppConfiguration = this.getOcppConfiguration();
@@ -1097,10 +1140,8 @@ export default class ChargingStation {
     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()} ${logMsg}`);
       throw new BaseError(logMsg);
     }
     if (!stationInfo?.Connectors[0]) {
@@ -1175,8 +1216,10 @@ export default class ChargingStation {
     let configuration: ChargingStationConfiguration = null;
     if (this.configurationFile && fs.existsSync(this.configurationFile)) {
       try {
-        if (this.cache.hasChargingStationConfiguration(this.configurationFileHash)) {
-          configuration = this.cache.getChargingStationConfiguration(this.configurationFileHash);
+        if (this.sharedLRUCache.hasChargingStationConfiguration(this.configurationFileHash)) {
+          configuration = this.sharedLRUCache.getChargingStationConfiguration(
+            this.configurationFileHash
+          );
         } else {
           const measureId = `${FileType.ChargingStationConfiguration} read`;
           const beginId = PerformanceStatistics.beginMeasure(measureId);
@@ -1185,7 +1228,7 @@ export default class ChargingStation {
           ) as ChargingStationConfiguration;
           PerformanceStatistics.endMeasure(measureId, beginId);
           this.configurationFileHash = configuration.configurationHash;
-          this.cache.setChargingStationConfiguration(configuration);
+          this.sharedLRUCache.setChargingStationConfiguration(configuration);
         }
       } catch (error) {
         FileUtils.handleFileException(
@@ -1223,9 +1266,9 @@ export default class ChargingStation {
           fs.writeFileSync(fileDescriptor, JSON.stringify(configurationData, null, 2), 'utf8');
           fs.closeSync(fileDescriptor);
           PerformanceStatistics.endMeasure(measureId, beginId);
-          this.cache.deleteChargingStationConfiguration(this.configurationFileHash);
+          this.sharedLRUCache.deleteChargingStationConfiguration(this.configurationFileHash);
           this.configurationFileHash = configurationHash;
-          this.cache.setChargingStationConfiguration(configurationData);
+          this.sharedLRUCache.setChargingStationConfiguration(configurationData);
         } else {
           logger.debug(
             `${this.logPrefix()} Not saving unchanged charging station configuration file ${
@@ -1372,7 +1415,7 @@ 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) {
@@ -1409,19 +1452,19 @@ export default class ChargingStation {
             }
             // Respond
             cachedRequest = this.requests.get(messageId);
-            if (Utils.isIterable(cachedRequest)) {
+            if (Array.isArray(cachedRequest) === true) {
               [responseCallback, , 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 ?? 'unknown'
               }' received response payload: ${JSON.stringify(request)}`
             );
             responseCallback(commandPayload, requestPayload);
@@ -1439,19 +1482,19 @@ 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 ?? 'unknown'
               }' received error payload: ${JSON.stringify(request)}`
             );
             errorCallback(new OCPPError(errorType, errorMessage, requestCommandName, errorDetails));
@@ -1459,24 +1502,34 @@ export default class ChargingStation {
           // Error
           default:
             // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
-            errMsg = `${this.logPrefix()} Wrong message type ${messageType}`;
-            logger.error(errMsg);
+            errMsg = `Wrong message type ${messageType}`;
+            logger.error(`${this.logPrefix()} ${errMsg}`);
             throw new OCPPError(ErrorType.PROTOCOL_ERROR, errMsg);
         }
+        parentPort.postMessage(MessageChannelUtils.buildUpdatedMessage(this));
       } else {
-        throw new OCPPError(ErrorType.PROTOCOL_ERROR, 'Incoming message is not iterable', null, {
+        throw new OCPPError(ErrorType.PROTOCOL_ERROR, 'Incoming message is not an array', null, {
           payload: request,
         });
       }
     } catch (error) {
       // Log
       logger.error(
-        '%s Incoming OCPP message %j matching cached request %j processing error %j',
-        this.logPrefix(),
-        data.toString(),
-        this.requests.get(messageId),
+        `${this.logPrefix()} Incoming OCPP command '${
+          commandName ?? requestCommandName ?? null
+        }' message '${data.toString()}' matching cached request '${JSON.stringify(
+          this.requests.get(messageId)
+        )}' processing error:`,
         error
       );
+      if (!(error instanceof OCPPError)) {
+        logger.warn(
+          `${this.logPrefix()} Error thrown at incoming OCPP command '${
+            commandName ?? requestCommandName ?? null
+          }' message '${data.toString()}' handling is not an OCPPError:`,
+          error
+        );
+      }
       // Send error
       messageType === MessageType.CALL_MESSAGE &&
         (await this.ocppRequestService.sendError(
@@ -1497,7 +1550,8 @@ export default class ChargingStation {
   }
 
   private onError(error: WSError): void {
-    logger.error(this.logPrefix() + ' WebSocket error: %j', error);
+    this.closeWSConnection();
+    logger.error(this.logPrefix() + ' WebSocket error:', error);
   }
 
   private getUseConnectorId0(stationInfo?: ChargingStationInfo): boolean | undefined {
@@ -1743,7 +1797,7 @@ export default class ChargingStation {
               {
                 connectorId,
                 transactionId,
-                meterValue: transactionEndMeterValue,
+                meterValue: [transactionEndMeterValue],
               }
             );
           }
@@ -1877,41 +1931,11 @@ export default class ChargingStation {
     }
   }
 
-  private 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?.closeOpened ?? false;
-    if (
-      !Utils.isNullOrUndefined(this.stationInfo.supervisionUser) &&
-      !Utils.isNullOrUndefined(this.stationInfo.supervisionPassword)
-    ) {
-      options.auth = `${this.stationInfo.supervisionUser}:${this.stationInfo.supervisionPassword}`;
-    }
-    if (this.isWebSocketConnectionOpened() && params?.closeOpened) {
-      this.wsConnection.close();
-    }
-    if (this.isWebSocketConnectionOpened() && params?.terminateOpened) {
+  private terminateWSConnection(): void {
+    if (this.isWebSocketConnectionOpened()) {
       this.wsConnection.terminate();
+      this.wsConnection = null;
     }
-    let protocol: string;
-    switch (this.getOcppVersion()) {
-      case OCPPVersion.VERSION_16:
-        protocol = 'ocpp' + OCPPVersion.VERSION_16;
-        break;
-      default:
-        this.handleUnsupportedVersion(this.getOcppVersion());
-        break;
-    }
-    this.wsConnection = new WebSocket(this.wsConnectionUrl, protocol, options);
-    logger.info(
-      this.logPrefix() + ' Open OCPP connection to URL ' + this.wsConnectionUrl.toString()
-    );
   }
 
   private stopMeterValues(connectorId: number) {