src/charging-station/ChargingStation.ts

   1 import { AuthorizationStatus, StartTransactionRequest, StartTransactionResponse, StopTransactionReason, StopTransactionRequest, StopTransactionResponse } from '../types/ocpp/1.6/Transaction';
   2 import { AvailabilityType, BootNotificationRequest, ChangeAvailabilityRequest, ChangeConfigurationRequest, GetConfigurationRequest, HeartbeatRequest, IncomingRequestCommand, RemoteStartTransactionRequest, RemoteStopTransactionRequest, RequestCommand, ResetRequest, SetChargingProfileRequest, StatusNotificationRequest, UnlockConnectorRequest } from '../types/ocpp/1.6/Requests';
   3 import { BootNotificationResponse, ChangeAvailabilityResponse, ChangeConfigurationResponse, DefaultResponse, GetConfigurationResponse, HeartbeatResponse, RegistrationStatus, SetChargingProfileResponse, StatusNotificationResponse, UnlockConnectorResponse } from '../types/ocpp/1.6/RequestResponses';
   4 import { ChargingProfile, ChargingProfilePurposeType } from '../types/ocpp/1.6/ChargingProfile';
   5 import ChargingStationConfiguration, { ConfigurationKey } from '../types/ChargingStationConfiguration';
   6 import ChargingStationTemplate, { PowerOutType } from '../types/ChargingStationTemplate';
   7 import Connectors, { Connector } from '../types/Connectors';
   8 import { MeterValue, MeterValueLocation, MeterValueMeasurand, MeterValuePhase, MeterValueUnit, MeterValuesRequest, MeterValuesResponse, SampledValue } from '../types/ocpp/1.6/MeterValues';
   9 import { PerformanceObserver, performance } from 'perf_hooks';
  10 import Requests, { IncomingRequest, Request } from '../types/ocpp/Requests';
  11 import WebSocket, { MessageEvent } from 'ws';
  12
  13 import AutomaticTransactionGenerator from './AutomaticTransactionGenerator';
  14 import { ChargePointErrorCode } from '../types/ocpp/1.6/ChargePointErrorCode';
  15 import { ChargePointStatus } from '../types/ocpp/1.6/ChargePointStatus';
  16 import ChargingStationInfo from '../types/ChargingStationInfo';
  17 import Configuration from '../utils/Configuration';
  18 import Constants from '../utils/Constants';
  19 import ElectricUtils from '../utils/ElectricUtils';
  20 import { ErrorType } from '../types/ocpp/ErrorType';
  21 import MeasurandValues from '../types/MeasurandValues';
  22 import { MessageType } from '../types/ocpp/MessageType';
  23 import { OCPPConfigurationKey } from '../types/ocpp/Configuration';
  24 import OCPPError from './OcppError';
  25 import { StandardParametersKey } from '../types/ocpp/1.6/Configuration';
  26 import Statistics from '../utils/Statistics';
  27 import Utils from '../utils/Utils';
  28 import { WebSocketCloseEventStatusCode } from '../types/WebSocket';
  29 import crypto from 'crypto';
  30 import fs from 'fs';
  31 import logger from '../utils/Logger';
  32
  33 export default class ChargingStation {
  34   private _index: number;
  35   private _stationTemplateFile: string;
  36   private _stationInfo: ChargingStationInfo;
  37   private _bootNotificationRequest: BootNotificationRequest;
  38   private _bootNotificationResponse: BootNotificationResponse;
  39   private _connectors: Connectors;
  40   private _configuration: ChargingStationConfiguration;
  41   private _connectorsConfigurationHash: string;
  42   private _supervisionUrl: string;
  43   private _wsConnectionUrl: string;
  44   private _wsConnection: WebSocket;
  45   private _hasStopped: boolean;
  46   private _hasSocketRestarted: boolean;
  47   private _autoReconnectRetryCount: number;
  48   private _requests: Requests;
  49   private _messageQueue: string[];
  50   private _automaticTransactionGeneration: AutomaticTransactionGenerator;
  51   private _authorizedTags: string[];
  52   private _heartbeatSetInterval: NodeJS.Timeout;
  53   private _webSocketPingSetInterval: NodeJS.Timeout;
  54   private _statistics: Statistics;
  55   private _performanceObserver: PerformanceObserver;
  56
  57   constructor(index: number, stationTemplateFile: string) {
  58     this._index = index;
  59     this._stationTemplateFile = stationTemplateFile;
  60     this._connectors = {} as Connectors;
  61     this._initialize();
  62
  63     this._hasStopped = false;
  64     this._hasSocketRestarted = false;
  65     this._autoReconnectRetryCount = 0;
  66
  67     this._requests = {} as Requests;
  68     this._messageQueue = [] as string[];
  69
  70     this._authorizedTags = this._loadAndGetAuthorizedTags();
  71   }
  72
  73   _getStationName(stationTemplate: ChargingStationTemplate): string {
  74     return stationTemplate.fixedName ? stationTemplate.baseName : stationTemplate.baseName + '-' + ('000000000' + this._index.toString()).substr(('000000000' + this._index.toString()).length - 4);
  75   }
  76
  77   _buildStationInfo(): ChargingStationInfo {
  78     let stationTemplateFromFile: ChargingStationTemplate;
  79     try {
  80       // Load template file
  81       const fileDescriptor = fs.openSync(this._stationTemplateFile, 'r');
  82       stationTemplateFromFile = JSON.parse(fs.readFileSync(fileDescriptor, 'utf8')) as ChargingStationTemplate;
  83       fs.closeSync(fileDescriptor);
  84     } catch (error) {
  85       logger.error('Template file ' + this._stationTemplateFile + ' loading error: %j', error);
  86       throw error;
  87     }
  88     const stationInfo: ChargingStationInfo = stationTemplateFromFile || {} as ChargingStationInfo;
  89     if (!Utils.isEmptyArray(stationTemplateFromFile.power)) {
  90       stationTemplateFromFile.power = stationTemplateFromFile.power as number[];
  91       stationInfo.maxPower = stationTemplateFromFile.power[Math.floor(Math.random() * stationTemplateFromFile.power.length)];
  92     } else {
  93       stationInfo.maxPower = stationTemplateFromFile.power as number;
  94     }
  95     stationInfo.name = this._getStationName(stationTemplateFromFile);
  96     stationInfo.resetTime = stationTemplateFromFile.resetTime ? stationTemplateFromFile.resetTime * 1000 : Constants.CHARGING_STATION_DEFAULT_RESET_TIME;
  97     return stationInfo;
  98   }
  99
 100   get stationInfo(): ChargingStationInfo {
 101     return this._stationInfo;
 102   }
 103
 104   _initialize(): void {
 105     this._stationInfo = this._buildStationInfo();
 106     this._bootNotificationRequest = {
 107       chargePointModel: this._stationInfo.chargePointModel,
 108       chargePointVendor: this._stationInfo.chargePointVendor,
 109       ...!Utils.isUndefined(this._stationInfo.chargeBoxSerialNumberPrefix) && { chargeBoxSerialNumber: this._stationInfo.chargeBoxSerialNumberPrefix },
 110       ...!Utils.isUndefined(this._stationInfo.firmwareVersion) && { firmwareVersion: this._stationInfo.firmwareVersion },
 111     };
 112     this._configuration = this._getTemplateChargingStationConfiguration();
 113     this._supervisionUrl = this._getSupervisionURL();
 114     this._wsConnectionUrl = this._supervisionUrl + '/' + this._stationInfo.name;
 115     // Build connectors if needed
 116     const maxConnectors = this._getMaxNumberOfConnectors();
 117     if (maxConnectors <= 0) {
 118       logger.warn(`${this._logPrefix()} Charging station template ${this._stationTemplateFile} with ${maxConnectors} connectors`);
 119     }
 120     const templateMaxConnectors = this._getTemplateMaxNumberOfConnectors();
 121     if (templateMaxConnectors <= 0) {
 122       logger.warn(`${this._logPrefix()} Charging station template ${this._stationTemplateFile} with no connector configuration`);
 123     }
 124     if (!this._stationInfo.Connectors[0]) {
 125       logger.warn(`${this._logPrefix()} Charging station template ${this._stationTemplateFile} with no connector Id 0 configuration`);
 126     }
 127     // Sanity check
 128     if (maxConnectors > (this._stationInfo.Connectors[0] ? templateMaxConnectors - 1 : templateMaxConnectors) && !this._stationInfo.randomConnectors) {
 129       logger.warn(`${this._logPrefix()} Number of connectors exceeds the number of connector configurations in template ${this._stationTemplateFile}, forcing random connector configurations affectation`);
 130       this._stationInfo.randomConnectors = true;
 131     }
 132     const connectorsConfigHash = crypto.createHash('sha256').update(JSON.stringify(this._stationInfo.Connectors) + maxConnectors.toString()).digest('hex');
 133     // FIXME: Handle shrinking the number of connectors
 134     if (!this._connectors || (this._connectors && this._connectorsConfigurationHash !== connectorsConfigHash)) {
 135       this._connectorsConfigurationHash = connectorsConfigHash;
 136       // Add connector Id 0
 137       let lastConnector = '0';
 138       for (lastConnector in this._stationInfo.Connectors) {
 139         if (Utils.convertToInt(lastConnector) === 0 && this._getUseConnectorId0() && this._stationInfo.Connectors[lastConnector]) {
 140           this._connectors[lastConnector] = Utils.cloneObject<Connector>(this._stationInfo.Connectors[lastConnector]);
 141           this._connectors[lastConnector].availability = AvailabilityType.OPERATIVE;
 142         }
 143       }
 144       // Generate all connectors
 145       if ((this._stationInfo.Connectors[0] ? templateMaxConnectors - 1 : templateMaxConnectors) > 0) {
 146         for (let index = 1; index <= maxConnectors; index++) {
 147           const randConnectorID = this._stationInfo.randomConnectors ? Utils.getRandomInt(Utils.convertToInt(lastConnector), 1) : index;
 148           this._connectors[index] = Utils.cloneObject<Connector>(this._stationInfo.Connectors[randConnectorID]);
 149           this._connectors[index].availability = AvailabilityType.OPERATIVE;
 150         }
 151       }
 152     }
 153     // Avoid duplication of connectors related information
 154     delete this._stationInfo.Connectors;
 155     // Initialize transaction attributes on connectors
 156     for (const connector in this._connectors) {
 157       if (Utils.convertToInt(connector) > 0 && !this.getConnector(Utils.convertToInt(connector)).transactionStarted) {
 158         this._initTransactionOnConnector(Utils.convertToInt(connector));
 159       }
 160     }
 161     // OCPP parameters
 162     this._addConfigurationKey(StandardParametersKey.NumberOfConnectors, this._getNumberOfConnectors().toString(), true);
 163     if (!this._getConfigurationKey(StandardParametersKey.MeterValuesSampledData)) {
 164       this._addConfigurationKey(StandardParametersKey.MeterValuesSampledData, MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER);
 165     }
 166     this._stationInfo.powerDivider = this._getPowerDivider();
 167     if (this.getEnableStatistics()) {
 168       this._statistics = Statistics.getInstance();
 169       this._statistics.objName = this._stationInfo.name;
 170       this._performanceObserver = new PerformanceObserver((list) => {
 171         const entry = list.getEntries()[0];
 172         this._statistics.logPerformance(entry, Constants.ENTITY_CHARGING_STATION);
 173         this._performanceObserver.disconnect();
 174       });
 175     }
 176   }
 177
 178   get connectors(): Connectors {
 179     return this._connectors;
 180   }
 181
 182   get statistics(): Statistics {
 183     return this._statistics;
 184   }
 185
 186   _logPrefix(): string {
 187     return Utils.logPrefix(` ${this._stationInfo.name}:`);
 188   }
 189
 190   _isWebSocketOpen(): boolean {
 191     return this._wsConnection?.readyState === WebSocket.OPEN;
 192   }
 193
 194   _isRegistered(): boolean {
 195     return this._bootNotificationResponse?.status === RegistrationStatus.ACCEPTED;
 196   }
 197
 198   _getTemplateChargingStationConfiguration(): ChargingStationConfiguration {
 199     return this._stationInfo.Configuration ? this._stationInfo.Configuration : {} as ChargingStationConfiguration;
 200   }
 201
 202   _getAuthorizationFile(): string {
 203     return this._stationInfo.authorizationFile && this._stationInfo.authorizationFile;
 204   }
 205
 206   _getUseConnectorId0(): boolean {
 207     return !Utils.isUndefined(this._stationInfo.useConnectorId0) ? this._stationInfo.useConnectorId0 : true;
 208   }
 209
 210   _loadAndGetAuthorizedTags(): string[] {
 211     let authorizedTags: string[] = [];
 212     const authorizationFile = this._getAuthorizationFile();
 213     if (authorizationFile) {
 214       try {
 215         // Load authorization file
 216         const fileDescriptor = fs.openSync(authorizationFile, 'r');
 217         authorizedTags = JSON.parse(fs.readFileSync(fileDescriptor, 'utf8')) as string[];
 218         fs.closeSync(fileDescriptor);
 219       } catch (error) {
 220         logger.error(this._logPrefix() + ' Authorization file ' + authorizationFile + ' loading error: %j', error);
 221         throw error;
 222       }
 223     } else {
 224       logger.info(this._logPrefix() + ' No authorization file given in template file ' + this._stationTemplateFile);
 225     }
 226     return authorizedTags;
 227   }
 228
 229   getRandomTagId(): string {
 230     const index = Math.floor(Math.random() * this._authorizedTags.length);
 231     return this._authorizedTags[index];
 232   }
 233
 234   hasAuthorizedTags(): boolean {
 235     return !Utils.isEmptyArray(this._authorizedTags);
 236   }
 237
 238   getEnableStatistics(): boolean {
 239     return !Utils.isUndefined(this._stationInfo.enableStatistics) ? this._stationInfo.enableStatistics : true;
 240   }
 241
 242   _getNumberOfPhases(): number {
 243     switch (this._getPowerOutType()) {
 244       case PowerOutType.AC:
 245         return !Utils.isUndefined(this._stationInfo.numberOfPhases) ? this._stationInfo.numberOfPhases : 3;
 246       case PowerOutType.DC:
 247         return 0;
 248     }
 249   }
 250
 251   _getNumberOfRunningTransactions(): number {
 252     let trxCount = 0;
 253     for (const connector in this._connectors) {
 254       if (Utils.convertToInt(connector) > 0 && this.getConnector(Utils.convertToInt(connector)).transactionStarted) {
 255         trxCount++;
 256       }
 257     }
 258     return trxCount;
 259   }
 260
 261   // 0 for disabling
 262   _getConnectionTimeout(): number {
 263     if (!Utils.isUndefined(this._stationInfo.connectionTimeout)) {
 264       return this._stationInfo.connectionTimeout;
 265     }
 266     if (!Utils.isUndefined(Configuration.getConnectionTimeout())) {
 267       return Configuration.getConnectionTimeout();
 268     }
 269     return 30;
 270   }
 271
 272   // -1 for unlimited, 0 for disabling
 273   _getAutoReconnectMaxRetries(): number {
 274     if (!Utils.isUndefined(this._stationInfo.autoReconnectMaxRetries)) {
 275       return this._stationInfo.autoReconnectMaxRetries;
 276     }
 277     if (!Utils.isUndefined(Configuration.getAutoReconnectMaxRetries())) {
 278       return Configuration.getAutoReconnectMaxRetries();
 279     }
 280     return -1;
 281   }
 282
 283   // 0 for disabling
 284   _getRegistrationMaxRetries(): number {
 285     if (!Utils.isUndefined(this._stationInfo.registrationMaxRetries)) {
 286       return this._stationInfo.registrationMaxRetries;
 287     }
 288     return -1;
 289   }
 290
 291   _getPowerDivider(): number {
 292     let powerDivider = this._getNumberOfConnectors();
 293     if (this._stationInfo.powerSharedByConnectors) {
 294       powerDivider = this._getNumberOfRunningTransactions();
 295     }
 296     return powerDivider;
 297   }
 298
 299   getConnector(id: number): Connector {
 300     return this._connectors[id];
 301   }
 302
 303   _isConnectorAvailable(id: number): boolean {
 304     return this.getConnector(id).availability === AvailabilityType.OPERATIVE;
 305   }
 306
 307   _getTemplateMaxNumberOfConnectors(): number {
 308     return Object.keys(this._stationInfo.Connectors).length;
 309   }
 310
 311   _getMaxNumberOfConnectors(): number {
 312     let maxConnectors = 0;
 313     if (!Utils.isEmptyArray(this._stationInfo.numberOfConnectors)) {
 314       const numberOfConnectors = this._stationInfo.numberOfConnectors as number[];
 315       // Distribute evenly the number of connectors
 316       maxConnectors = numberOfConnectors[(this._index - 1) % numberOfConnectors.length];
 317     } else if (!Utils.isUndefined(this._stationInfo.numberOfConnectors)) {
 318       maxConnectors = this._stationInfo.numberOfConnectors as number;
 319     } else {
 320       maxConnectors = this._stationInfo.Connectors[0] ? this._getTemplateMaxNumberOfConnectors() - 1 : this._getTemplateMaxNumberOfConnectors();
 321     }
 322     return maxConnectors;
 323   }
 324
 325   _getNumberOfConnectors(): number {
 326     return this._connectors[0] ? Object.keys(this._connectors).length - 1 : Object.keys(this._connectors).length;
 327   }
 328
 329   _getVoltageOut(): number {
 330     const errMsg = `${this._logPrefix()} Unknown ${this._getPowerOutType()} powerOutType in template file ${this._stationTemplateFile}, cannot define default voltage out`;
 331     let defaultVoltageOut: number;
 332     switch (this._getPowerOutType()) {
 333       case PowerOutType.AC:
 334         defaultVoltageOut = 230;
 335         break;
 336       case PowerOutType.DC:
 337         defaultVoltageOut = 400;
 338         break;
 339       default:
 340         logger.error(errMsg);
 341         throw Error(errMsg);
 342     }
 343     return !Utils.isUndefined(this._stationInfo.voltageOut) ? this._stationInfo.voltageOut : defaultVoltageOut;
 344   }
 345
 346   _getTransactionIdTag(transactionId: number): string {
 347     for (const connector in this._connectors) {
 348       if (Utils.convertToInt(connector) > 0 && this.getConnector(Utils.convertToInt(connector)).transactionId === transactionId) {
 349         return this.getConnector(Utils.convertToInt(connector)).idTag;
 350       }
 351     }
 352   }
 353
 354   _getTransactionMeterStop(transactionId: number): number {
 355     for (const connector in this._connectors) {
 356       if (Utils.convertToInt(connector) > 0 && this.getConnector(Utils.convertToInt(connector)).transactionId === transactionId) {
 357         return this.getConnector(Utils.convertToInt(connector)).lastEnergyActiveImportRegisterValue;
 358       }
 359     }
 360   }
 361
 362   _getPowerOutType(): PowerOutType {
 363     return !Utils.isUndefined(this._stationInfo.powerOutType) ? this._stationInfo.powerOutType : PowerOutType.AC;
 364   }
 365
 366   _getSupervisionURL(): string {
 367     const supervisionUrls = Utils.cloneObject<string | string[]>(this._stationInfo.supervisionURL ? this._stationInfo.supervisionURL : Configuration.getSupervisionURLs());
 368     let indexUrl = 0;
 369     if (!Utils.isEmptyArray(supervisionUrls)) {
 370       if (Configuration.getDistributeStationsToTenantsEqually()) {
 371         indexUrl = this._index % supervisionUrls.length;
 372       } else {
 373         // Get a random url
 374         indexUrl = Math.floor(Math.random() * supervisionUrls.length);
 375       }
 376       return supervisionUrls[indexUrl];
 377     }
 378     return supervisionUrls as string;
 379   }
 380
 381   _getReconnectExponentialDelay(): boolean {
 382     return !Utils.isUndefined(this._stationInfo.reconnectExponentialDelay) ? this._stationInfo.reconnectExponentialDelay : false;
 383   }
 384
 385   _getHeartbeatInterval(): number {
 386     const HeartbeatInterval = this._getConfigurationKey(StandardParametersKey.HeartbeatInterval);
 387     if (HeartbeatInterval) {
 388       return Utils.convertToInt(HeartbeatInterval.value) * 1000;
 389     }
 390     const HeartBeatInterval = this._getConfigurationKey(StandardParametersKey.HeartBeatInterval);
 391     if (HeartBeatInterval) {
 392       return Utils.convertToInt(HeartBeatInterval.value) * 1000;
 393     }
 394   }
 395
 396   _getAuthorizeRemoteTxRequests(): boolean {
 397     const authorizeRemoteTxRequests = this._getConfigurationKey(StandardParametersKey.AuthorizeRemoteTxRequests);
 398     return authorizeRemoteTxRequests ? Utils.convertToBoolean(authorizeRemoteTxRequests.value) : false;
 399   }
 400
 401   _getLocalAuthListEnabled(): boolean {
 402     const localAuthListEnabled = this._getConfigurationKey(StandardParametersKey.LocalAuthListEnabled);
 403     return localAuthListEnabled ? Utils.convertToBoolean(localAuthListEnabled.value) : false;
 404   }
 405
 406   async _startMessageSequence(): Promise<void> {
 407     // Start WebSocket ping
 408     this._startWebSocketPing();
 409     // Start heartbeat
 410     this._startHeartbeat();
 411     // Initialize connectors status
 412     for (const connector in this._connectors) {
 413       if (Utils.convertToInt(connector) === 0) {
 414         continue;
 415       } else if (!this._hasStopped && !this.getConnector(Utils.convertToInt(connector))?.status && this.getConnector(Utils.convertToInt(connector))?.bootStatus) {
 416         // Send status in template at startup
 417         await this.sendStatusNotification(Utils.convertToInt(connector), this.getConnector(Utils.convertToInt(connector)).bootStatus);
 418       } else if (this._hasStopped && this.getConnector(Utils.convertToInt(connector))?.bootStatus) {
 419         // Send status in template after reset
 420         await this.sendStatusNotification(Utils.convertToInt(connector), this.getConnector(Utils.convertToInt(connector)).bootStatus);
 421       } else if (!this._hasStopped && this.getConnector(Utils.convertToInt(connector))?.status) {
 422         // Send previous status at template reload
 423         await this.sendStatusNotification(Utils.convertToInt(connector), this.getConnector(Utils.convertToInt(connector)).status);
 424       } else {
 425         // Send default status
 426         await this.sendStatusNotification(Utils.convertToInt(connector), ChargePointStatus.AVAILABLE);
 427       }
 428     }
 429     // Start the ATG
 430     if (this._stationInfo.AutomaticTransactionGenerator.enable) {
 431       if (!this._automaticTransactionGeneration) {
 432         this._automaticTransactionGeneration = new AutomaticTransactionGenerator(this);
 433       }
 434       if (this._automaticTransactionGeneration.timeToStop) {
 435         this._automaticTransactionGeneration.start();
 436       }
 437     }
 438     if (this.getEnableStatistics()) {
 439       this._statistics.start();
 440     }
 441   }
 442
 443   async _stopMessageSequence(reason: StopTransactionReason = StopTransactionReason.NONE): Promise<void> {
 444     // Stop WebSocket ping
 445     this._stopWebSocketPing();
 446     // Stop heartbeat
 447     this._stopHeartbeat();
 448     // Stop the ATG
 449     if (this._stationInfo.AutomaticTransactionGenerator.enable &&
 450       this._automaticTransactionGeneration &&
 451       !this._automaticTransactionGeneration.timeToStop) {
 452       await this._automaticTransactionGeneration.stop(reason);
 453     } else {
 454       for (const connector in this._connectors) {
 455         if (Utils.convertToInt(connector) > 0 && this.getConnector(Utils.convertToInt(connector)).transactionStarted) {
 456           await this.sendStopTransaction(this.getConnector(Utils.convertToInt(connector)).transactionId, reason);
 457         }
 458       }
 459     }
 460   }
 461
 462   _startWebSocketPing(): void {
 463     const webSocketPingInterval: number = this._getConfigurationKey(StandardParametersKey.WebSocketPingInterval) ? Utils.convertToInt(this._getConfigurationKey(StandardParametersKey.WebSocketPingInterval).value) : 0;
 464     if (webSocketPingInterval > 0 && !this._webSocketPingSetInterval) {
 465       this._webSocketPingSetInterval = setInterval(() => {
 466         if (this._isWebSocketOpen()) {
 467           this._wsConnection.ping((): void => { });
 468         }
 469       }, webSocketPingInterval * 1000);
 470       logger.info(this._logPrefix() + ' WebSocket ping started every ' + Utils.secondsToHHMMSS(webSocketPingInterval));
 471     } else if (this._webSocketPingSetInterval) {
 472       logger.info(this._logPrefix() + ' WebSocket ping every ' + Utils.secondsToHHMMSS(webSocketPingInterval) + ' already started');
 473     } else {
 474       logger.error(`${this._logPrefix()} WebSocket ping interval set to ${webSocketPingInterval ? Utils.secondsToHHMMSS(webSocketPingInterval) : webSocketPingInterval}, not starting the WebSocket ping`);
 475     }
 476   }
 477
 478   _stopWebSocketPing(): void {
 479     if (this._webSocketPingSetInterval) {
 480       clearInterval(this._webSocketPingSetInterval);
 481       this._webSocketPingSetInterval = null;
 482     }
 483   }
 484
 485   _restartWebSocketPing(): void {
 486     // Stop WebSocket ping
 487     this._stopWebSocketPing();
 488     // Start WebSocket ping
 489     this._startWebSocketPing();
 490   }
 491
 492   _startHeartbeat(): void {
 493     if (this._getHeartbeatInterval() && this._getHeartbeatInterval() > 0 && !this._heartbeatSetInterval) {
 494       this._heartbeatSetInterval = setInterval(async () => {
 495         await this.sendHeartbeat();
 496       }, this._getHeartbeatInterval());
 497       logger.info(this._logPrefix() + ' Heartbeat started every ' + Utils.milliSecondsToHHMMSS(this._getHeartbeatInterval()));
 498     } else if (this._heartbeatSetInterval) {
 499       logger.info(this._logPrefix() + ' Heartbeat every ' + Utils.milliSecondsToHHMMSS(this._getHeartbeatInterval()) + ' already started');
 500     } else {
 501       logger.error(`${this._logPrefix()} Heartbeat interval set to ${this._getHeartbeatInterval() ? Utils.milliSecondsToHHMMSS(this._getHeartbeatInterval()) : this._getHeartbeatInterval()}, not starting the heartbeat`);
 502     }
 503   }
 504
 505   _stopHeartbeat(): void {
 506     if (this._heartbeatSetInterval) {
 507       clearInterval(this._heartbeatSetInterval);
 508       this._heartbeatSetInterval = null;
 509     }
 510   }
 511
 512   _restartHeartbeat(): void {
 513     // Stop heartbeat
 514     this._stopHeartbeat();
 515     // Start heartbeat
 516     this._startHeartbeat();
 517   }
 518
 519   _startAuthorizationFileMonitoring(): void {
 520     // eslint-disable-next-line @typescript-eslint/no-unused-vars
 521     fs.watchFile(this._getAuthorizationFile(), (current, previous) => {
 522       try {
 523         logger.debug(this._logPrefix() + ' Authorization file ' + this._getAuthorizationFile() + ' have changed, reload');
 524         // Initialize _authorizedTags
 525         this._authorizedTags = this._loadAndGetAuthorizedTags();
 526       } catch (error) {
 527         logger.error(this._logPrefix() + ' Authorization file monitoring error: %j', error);
 528       }
 529     });
 530   }
 531
 532   _startStationTemplateFileMonitoring(): void {
 533     // eslint-disable-next-line @typescript-eslint/no-unused-vars
 534     fs.watchFile(this._stationTemplateFile, (current, previous) => {
 535       try {
 536         logger.debug(this._logPrefix() + ' Template file ' + this._stationTemplateFile + ' have changed, reload');
 537         // Initialize
 538         this._initialize();
 539         if (!this._stationInfo.AutomaticTransactionGenerator.enable &&
 540           this._automaticTransactionGeneration) {
 541           this._automaticTransactionGeneration.stop().catch(() => { });
 542         }
 543         // FIXME?: restart heartbeat and WebSocket ping when their interval values have changed
 544       } catch (error) {
 545         logger.error(this._logPrefix() + ' Charging station template file monitoring error: %j', error);
 546       }
 547     });
 548   }
 549
 550   _startMeterValues(connectorId: number, interval: number): void {
 551     if (connectorId === 0) {
 552       logger.error(`${this._logPrefix()} Trying to start MeterValues on connector Id ${connectorId.toString()}`);
 553       return;
 554     }
 555     if (!this.getConnector(connectorId)) {
 556       logger.error(`${this._logPrefix()} Trying to start MeterValues on non existing connector Id ${connectorId.toString()}`);
 557       return;
 558     }
 559     if (!this.getConnector(connectorId)?.transactionStarted) {
 560       logger.error(`${this._logPrefix()} Trying to start MeterValues on connector Id ${connectorId} with no transaction started`);
 561       return;
 562     } else if (this.getConnector(connectorId)?.transactionStarted && !this.getConnector(connectorId)?.transactionId) {
 563       logger.error(`${this._logPrefix()} Trying to start MeterValues on connector Id ${connectorId} with no transaction id`);
 564       return;
 565     }
 566     if (interval > 0) {
 567       this.getConnector(connectorId).transactionSetInterval = setInterval(async () => {
 568         if (this.getEnableStatistics()) {
 569           const sendMeterValues = performance.timerify(this.sendMeterValues);
 570           this._performanceObserver.observe({
 571             entryTypes: ['function'],
 572           });
 573           await sendMeterValues(connectorId, interval, this);
 574         } else {
 575           await this.sendMeterValues(connectorId, interval, this);
 576         }
 577       }, interval);
 578     } else {
 579       logger.error(`${this._logPrefix()} Charging station MeterValueSampleInterval configuration set to ${Utils.milliSecondsToHHMMSS(interval)}, not sending MeterValues`);
 580     }
 581   }
 582
 583   _openWSConnection(options?: WebSocket.ClientOptions, forceCloseOpened = false): void {
 584     if (Utils.isUndefined(options)) {
 585       options = {} as WebSocket.ClientOptions;
 586     }
 587     if (Utils.isUndefined(options.handshakeTimeout)) {
 588       options.handshakeTimeout = this._getConnectionTimeout() * 1000;
 589     }
 590     if (this._isWebSocketOpen() && forceCloseOpened) {
 591       this._wsConnection.close();
 592     }
 593     this._wsConnection = new WebSocket(this._wsConnectionUrl, 'ocpp' + Constants.OCPP_VERSION_16, options);
 594     logger.info(this._logPrefix() + ' Will communicate through URL ' + this._supervisionUrl);
 595   }
 596
 597   start(): void {
 598     this._openWSConnection();
 599     // Monitor authorization file
 600     this._startAuthorizationFileMonitoring();
 601     // Monitor station template file
 602     this._startStationTemplateFileMonitoring();
 603     // Handle Socket incoming messages
 604     this._wsConnection.on('message', this.onMessage.bind(this));
 605     // Handle Socket error
 606     this._wsConnection.on('error', this.onError.bind(this));
 607     // Handle Socket close
 608     this._wsConnection.on('close', this.onClose.bind(this));
 609     // Handle Socket opening connection
 610     this._wsConnection.on('open', this.onOpen.bind(this));
 611     // Handle Socket ping
 612     this._wsConnection.on('ping', this.onPing.bind(this));
 613     // Handle Socket pong
 614     this._wsConnection.on('pong', this.onPong.bind(this));
 615   }
 616
 617   async stop(reason: StopTransactionReason = StopTransactionReason.NONE): Promise<void> {
 618     // Stop message sequence
 619     await this._stopMessageSequence(reason);
 620     for (const connector in this._connectors) {
 621       if (Utils.convertToInt(connector) > 0) {
 622         await this.sendStatusNotification(Utils.convertToInt(connector), ChargePointStatus.UNAVAILABLE);
 623       }
 624     }
 625     if (this._isWebSocketOpen()) {
 626       this._wsConnection.close();
 627     }
 628     this._bootNotificationResponse = null;
 629     this._hasStopped = true;
 630   }
 631
 632   async _reconnect(error): Promise<void> {
 633     // Stop heartbeat
 634     this._stopHeartbeat();
 635     // Stop the ATG if needed
 636     if (this._stationInfo.AutomaticTransactionGenerator.enable &&
 637       this._stationInfo.AutomaticTransactionGenerator.stopOnConnectionFailure &&
 638       this._automaticTransactionGeneration &&
 639       !this._automaticTransactionGeneration.timeToStop) {
 640       this._automaticTransactionGeneration.stop().catch(() => { });
 641     }
 642     if (this._autoReconnectRetryCount < this._getAutoReconnectMaxRetries() || this._getAutoReconnectMaxRetries() === -1) {
 643       this._autoReconnectRetryCount++;
 644       const reconnectDelay = (this._getReconnectExponentialDelay() ? Utils.exponentialDelay(this._autoReconnectRetryCount) : this._getConnectionTimeout() * 1000);
 645       logger.error(`${this._logPrefix()} Socket: connection retry in ${Utils.roundTo(reconnectDelay, 2)}ms, timeout ${reconnectDelay - 100}ms`);
 646       await Utils.sleep(reconnectDelay);
 647       logger.error(this._logPrefix() + ' Socket: reconnecting try #' + this._autoReconnectRetryCount.toString());
 648       this._openWSConnection({ handshakeTimeout: reconnectDelay - 100 });
 649       this._hasSocketRestarted = true;
 650     } else if (this._getAutoReconnectMaxRetries() !== -1) {
 651       logger.error(`${this._logPrefix()} Socket reconnect failure: max retries reached (${this._autoReconnectRetryCount}) or retry disabled (${this._getAutoReconnectMaxRetries()})`);
 652     }
 653   }
 654
 655   async onOpen(): Promise<void> {
 656     logger.info(`${this._logPrefix()} Is connected to server through ${this._wsConnectionUrl}`);
 657     if (!this._isRegistered()) {
 658       // Send BootNotification
 659       let registrationRetryCount = 0;
 660       do {
 661         this._bootNotificationResponse = await this.sendBootNotification();
 662         if (!this._isRegistered()) {
 663           registrationRetryCount++;
 664           await Utils.sleep(this._bootNotificationResponse.interval * 1000);
 665         }
 666       } while (!this._isRegistered() && (registrationRetryCount <= this._getRegistrationMaxRetries() || this._getRegistrationMaxRetries() === -1));
 667     }
 668     if (this._isRegistered()) {
 669       await this._startMessageSequence();
 670       if (this._hasSocketRestarted && this._isWebSocketOpen()) {
 671         if (!Utils.isEmptyArray(this._messageQueue)) {
 672           this._messageQueue.forEach((message, index) => {
 673             this._messageQueue.splice(index, 1);
 674             this._wsConnection.send(message);
 675           });
 676         }
 677       }
 678     } else {
 679       logger.error(`${this._logPrefix()} Registration failure: max retries reached (${this._getRegistrationMaxRetries()}) or retry disabled (${this._getRegistrationMaxRetries()})`);
 680     }
 681     this._autoReconnectRetryCount = 0;
 682     this._hasSocketRestarted = false;
 683   }
 684
 685   async onError(errorEvent): Promise<void> {
 686     logger.error(this._logPrefix() + ' Socket error: %j', errorEvent);
 687     // pragma switch (errorEvent.code) {
 688     //   case 'ECONNREFUSED':
 689     //     await this._reconnect(errorEvent);
 690     //     break;
 691     // }
 692   }
 693
 694   async onClose(closeEvent): Promise<void> {
 695     switch (closeEvent) {
 696       case WebSocketCloseEventStatusCode.CLOSE_NORMAL: // Normal close
 697       case WebSocketCloseEventStatusCode.CLOSE_NO_STATUS:
 698         logger.info(`${this._logPrefix()} Socket normally closed with status '${Utils.getWebSocketCloseEventStatusString(closeEvent)}'`);
 699         this._autoReconnectRetryCount = 0;
 700         break;
 701       default: // Abnormal close
 702         logger.error(`${this._logPrefix()} Socket abnormally closed with status '${Utils.getWebSocketCloseEventStatusString(closeEvent)}'`);
 703         await this._reconnect(closeEvent);
 704         break;
 705     }
 706   }
 707
 708   onPing(): void {
 709     logger.debug(this._logPrefix() + ' Has received a WS ping (rfc6455) from the server');
 710   }
 711
 712   onPong(): void {
 713     logger.debug(this._logPrefix() + ' Has received a WS pong (rfc6455) from the server');
 714   }
 715
 716   async onMessage(messageEvent: MessageEvent): Promise<void> {
 717     let [messageType, messageId, commandName, commandPayload, errorDetails]: IncomingRequest = [0, '', '' as IncomingRequestCommand, '', ''];
 718     let responseCallback: (payload?, requestPayload?) => void;
 719     let rejectCallback: (error: OCPPError) => void;
 720     let requestPayload: Record<string, unknown>;
 721     let errMsg: string;
 722     try {
 723       // Parse the message
 724       [messageType, messageId, commandName, commandPayload, errorDetails] = JSON.parse(messageEvent.toString()) as IncomingRequest;
 725
 726       // Check the Type of message
 727       switch (messageType) {
 728         // Incoming Message
 729         case MessageType.CALL_MESSAGE:
 730           if (this.getEnableStatistics()) {
 731             this._statistics.addMessage(commandName, messageType);
 732           }
 733           // Process the call
 734           await this.handleRequest(messageId, commandName, commandPayload);
 735           break;
 736         // Outcome Message
 737         case MessageType.CALL_RESULT_MESSAGE:
 738           // Respond
 739           if (Utils.isIterable(this._requests[messageId])) {
 740             [responseCallback, , requestPayload] = this._requests[messageId];
 741           } else {
 742             throw new Error(`Response request for message id ${messageId} is not iterable`);
 743           }
 744           if (!responseCallback) {
 745             // Error
 746             throw new Error(`Response request for unknown message id ${messageId}`);
 747           }
 748           delete this._requests[messageId];
 749           responseCallback(commandName, requestPayload);
 750           break;
 751         // Error Message
 752         case MessageType.CALL_ERROR_MESSAGE:
 753           if (!this._requests[messageId]) {
 754             // Error
 755             throw new Error(`Error request for unknown message id ${messageId}`);
 756           }
 757           if (Utils.isIterable(this._requests[messageId])) {
 758             [, rejectCallback] = this._requests[messageId];
 759           } else {
 760             throw new Error(`Error request for message id ${messageId} is not iterable`);
 761           }
 762           delete this._requests[messageId];
 763           rejectCallback(new OCPPError(commandName, commandPayload, errorDetails));
 764           break;
 765         // Error
 766         default:
 767           errMsg = `${this._logPrefix()} Wrong message type ${messageType}`;
 768           logger.error(errMsg);
 769           throw new Error(errMsg);
 770       }
 771     } catch (error) {
 772       // Log
 773       logger.error('%s Incoming message %j processing error %j on request content type %j', this._logPrefix(), messageEvent, error, this._requests[messageId]);
 774       // Send error
 775       messageType !== MessageType.CALL_ERROR_MESSAGE && await this.sendError(messageId, error, commandName);
 776     }
 777   }
 778
 779   async sendHeartbeat(): Promise<void> {
 780     try {
 781       const payload: HeartbeatRequest = {};
 782       await this.sendMessage(Utils.generateUUID(), payload, MessageType.CALL_MESSAGE, RequestCommand.HEARTBEAT);
 783     } catch (error) {
 784       this.handleRequestError(RequestCommand.HEARTBEAT, error);
 785     }
 786   }
 787
 788   async sendBootNotification(): Promise<BootNotificationResponse> {
 789     try {
 790       return await this.sendMessage(Utils.generateUUID(), this._bootNotificationRequest, MessageType.CALL_MESSAGE, RequestCommand.BOOT_NOTIFICATION) as BootNotificationResponse;
 791     } catch (error) {
 792       this.handleRequestError(RequestCommand.BOOT_NOTIFICATION, error);
 793     }
 794   }
 795
 796   async sendStatusNotification(connectorId: number, status: ChargePointStatus, errorCode: ChargePointErrorCode = ChargePointErrorCode.NO_ERROR): Promise<void> {
 797     this.getConnector(connectorId).status = status;
 798     try {
 799       const payload: StatusNotificationRequest = {
 800         connectorId,
 801         errorCode,
 802         status,
 803       };
 804       await this.sendMessage(Utils.generateUUID(), payload, MessageType.CALL_MESSAGE, RequestCommand.STATUS_NOTIFICATION);
 805     } catch (error) {
 806       this.handleRequestError(RequestCommand.STATUS_NOTIFICATION, error);
 807     }
 808   }
 809
 810   async sendStartTransaction(connectorId: number, idTag?: string): Promise<StartTransactionResponse> {
 811     try {
 812       const payload: StartTransactionRequest = {
 813         connectorId,
 814         ...!Utils.isUndefined(idTag) ? { idTag } : { idTag: Constants.TRANSACTION_DEFAULT_IDTAG },
 815         meterStart: 0,
 816         timestamp: new Date().toISOString(),
 817       };
 818       return await this.sendMessage(Utils.generateUUID(), payload, MessageType.CALL_MESSAGE, RequestCommand.START_TRANSACTION) as StartTransactionResponse;
 819     } catch (error) {
 820       this.handleRequestError(RequestCommand.START_TRANSACTION, error);
 821     }
 822   }
 823
 824   async sendStopTransaction(transactionId: number, reason: StopTransactionReason = StopTransactionReason.NONE): Promise<StopTransactionResponse> {
 825     const idTag = this._getTransactionIdTag(transactionId);
 826     try {
 827       const payload: StopTransactionRequest = {
 828         transactionId,
 829         ...!Utils.isUndefined(idTag) && { idTag: idTag },
 830         meterStop: this._getTransactionMeterStop(transactionId),
 831         timestamp: new Date().toISOString(),
 832         ...reason && { reason },
 833       };
 834       return await this.sendMessage(Utils.generateUUID(), payload, MessageType.CALL_MESSAGE, RequestCommand.STOP_TRANSACTION) as StartTransactionResponse;
 835     } catch (error) {
 836       this.handleRequestError(RequestCommand.STOP_TRANSACTION, error);
 837     }
 838   }
 839
 840   async sendError(messageId: string, err: Error | OCPPError, commandName: RequestCommand | IncomingRequestCommand): Promise<unknown> {
 841     // Check exception type: only OCPP error are accepted
 842     const error = err instanceof OCPPError ? err : new OCPPError(ErrorType.INTERNAL_ERROR, err.message, err.stack && err.stack);
 843     // Send error
 844     return this.sendMessage(messageId, error, MessageType.CALL_ERROR_MESSAGE, commandName);
 845   }
 846
 847   async sendMessage(messageId: string, commandParams, messageType: MessageType = MessageType.CALL_RESULT_MESSAGE, commandName: RequestCommand | IncomingRequestCommand): Promise<any> {
 848     // eslint-disable-next-line @typescript-eslint/no-this-alias
 849     const self = this;
 850     // Send a message through wsConnection
 851     return new Promise((resolve: (value?: any | PromiseLike<any>) => void, reject: (reason?: any) => void) => {
 852       let messageToSend: string;
 853       // Type of message
 854       switch (messageType) {
 855         // Request
 856         case MessageType.CALL_MESSAGE:
 857           // Build request
 858           this._requests[messageId] = [responseCallback, rejectCallback, commandParams] as Request;
 859           messageToSend = JSON.stringify([messageType, messageId, commandName, commandParams]);
 860           break;
 861         // Response
 862         case MessageType.CALL_RESULT_MESSAGE:
 863           // Build response
 864           messageToSend = JSON.stringify([messageType, messageId, commandParams]);
 865           break;
 866         // Error Message
 867         case MessageType.CALL_ERROR_MESSAGE:
 868           // Build Error Message
 869           messageToSend = JSON.stringify([messageType, messageId, commandParams.code ? commandParams.code : ErrorType.GENERIC_ERROR, commandParams.message ? commandParams.message : '', commandParams.details ? commandParams.details : {}]);
 870           break;
 871       }
 872       // Check if wsConnection opened and charging station registered
 873       if (this._isWebSocketOpen() && (this._isRegistered() || commandName === RequestCommand.BOOT_NOTIFICATION)) {
 874         if (this.getEnableStatistics()) {
 875           this._statistics.addMessage(commandName, messageType);
 876         }
 877         // Yes: Send Message
 878         this._wsConnection.send(messageToSend);
 879       } else {
 880         let dups = false;
 881         // Handle dups in buffer
 882         for (const message of this._messageQueue) {
 883           // Same message
 884           if (messageToSend === message) {
 885             dups = true;
 886             break;
 887           }
 888         }
 889         if (!dups) {
 890           // Buffer message
 891           this._messageQueue.push(messageToSend);
 892         }
 893         // Reject it
 894         return rejectCallback(new OCPPError(commandParams.code ? commandParams.code : ErrorType.GENERIC_ERROR, commandParams.message ? commandParams.message : `WebSocket closed for message id '${messageId}' with content '${messageToSend}', message buffered`, commandParams.details ? commandParams.details : {}));
 895       }
 896       // Response?
 897       if (messageType === MessageType.CALL_RESULT_MESSAGE) {
 898         // Yes: send Ok
 899         resolve();
 900       } else if (messageType === MessageType.CALL_ERROR_MESSAGE) {
 901         // Send timeout
 902         setTimeout(() => rejectCallback(new OCPPError(commandParams.code ? commandParams.code : ErrorType.GENERIC_ERROR, commandParams.message ? commandParams.message : `Timeout for message id '${messageId}' with content '${messageToSend}'`, commandParams.details ? commandParams.details : {})), Constants.OCPP_ERROR_TIMEOUT);
 903       }
 904
 905       // Function that will receive the request's response
 906       async function responseCallback(payload, requestPayload): Promise<void> {
 907         if (self.getEnableStatistics()) {
 908           self._statistics.addMessage(commandName, messageType);
 909         }
 910         // Send the response
 911         await self.handleResponse(commandName as RequestCommand, payload, requestPayload);
 912         resolve(payload);
 913       }
 914
 915       // Function that will receive the request's rejection
 916       function rejectCallback(error: OCPPError): void {
 917         if (self.getEnableStatistics()) {
 918           self._statistics.addMessage(commandName, messageType);
 919         }
 920         logger.debug(`${self._logPrefix()} Error: %j occurred when calling command %s with parameters: %j`, error, commandName, commandParams);
 921         // Build Exception
 922         // eslint-disable-next-line no-empty-function
 923         self._requests[messageId] = [() => { }, () => { }, {}]; // Properly format the request
 924         // Send error
 925         reject(error);
 926       }
 927     });
 928   }
 929
 930   async handleResponse(commandName: RequestCommand, payload, requestPayload): Promise<void> {
 931     const responseCallbackFn = 'handleResponse' + commandName;
 932     if (typeof this[responseCallbackFn] === 'function') {
 933       await this[responseCallbackFn](payload, requestPayload);
 934     } else {
 935       logger.error(this._logPrefix() + ' Trying to call an undefined response callback function: ' + responseCallbackFn);
 936     }
 937   }
 938
 939   handleResponseBootNotification(payload: BootNotificationResponse, requestPayload: BootNotificationRequest): void {
 940     if (payload.status === RegistrationStatus.ACCEPTED) {
 941       this._heartbeatSetInterval ? this._restartHeartbeat() : this._startHeartbeat();
 942       this._addConfigurationKey(StandardParametersKey.HeartBeatInterval, payload.interval.toString());
 943       this._addConfigurationKey(StandardParametersKey.HeartbeatInterval, payload.interval.toString(), false, false);
 944       this._hasStopped && (this._hasStopped = false);
 945     } else if (payload.status === RegistrationStatus.PENDING) {
 946       logger.info(this._logPrefix() + ' Charging station in pending state on the central server');
 947     } else {
 948       logger.info(this._logPrefix() + ' Charging station rejected by the central server');
 949     }
 950   }
 951
 952   _initTransactionOnConnector(connectorId: number): void {
 953     this.getConnector(connectorId).transactionStarted = false;
 954     this.getConnector(connectorId).transactionId = null;
 955     this.getConnector(connectorId).idTag = null;
 956     this.getConnector(connectorId).lastEnergyActiveImportRegisterValue = -1;
 957   }
 958
 959   _resetTransactionOnConnector(connectorId: number): void {
 960     this._initTransactionOnConnector(connectorId);
 961     if (this.getConnector(connectorId)?.transactionSetInterval) {
 962       clearInterval(this.getConnector(connectorId).transactionSetInterval);
 963     }
 964   }
 965
 966   async handleResponseStartTransaction(payload: StartTransactionResponse, requestPayload: StartTransactionRequest): Promise<void> {
 967     const connectorId = requestPayload.connectorId;
 968
 969     let transactionConnectorId: number;
 970     for (const connector in this._connectors) {
 971       if (Utils.convertToInt(connector) > 0 && Utils.convertToInt(connector) === connectorId) {
 972         transactionConnectorId = Utils.convertToInt(connector);
 973         break;
 974       }
 975     }
 976     if (!transactionConnectorId) {
 977       logger.error(this._logPrefix() + ' Trying to start a transaction on a non existing connector Id ' + connectorId.toString());
 978       return;
 979     }
 980     if (this.getConnector(connectorId)?.transactionStarted) {
 981       logger.debug(this._logPrefix() + ' Trying to start a transaction on an already used connector ' + connectorId.toString() + ': %j', this.getConnector(connectorId));
 982       return;
 983     }
 984
 985     if (payload.idTagInfo.status === AuthorizationStatus.ACCEPTED) {
 986       this.getConnector(connectorId).transactionStarted = true;
 987       this.getConnector(connectorId).transactionId = payload.transactionId;
 988       this.getConnector(connectorId).idTag = requestPayload.idTag;
 989       this.getConnector(connectorId).lastEnergyActiveImportRegisterValue = 0;
 990       await this.sendStatusNotification(connectorId, ChargePointStatus.CHARGING);
 991       logger.info(this._logPrefix() + ' Transaction ' + payload.transactionId.toString() + ' STARTED on ' + this._stationInfo.name + '#' + connectorId.toString() + ' for idTag ' + requestPayload.idTag);
 992       if (this._stationInfo.powerSharedByConnectors) {
 993         this._stationInfo.powerDivider++;
 994       }
 995       const configuredMeterValueSampleInterval = this._getConfigurationKey(StandardParametersKey.MeterValueSampleInterval);
 996       this._startMeterValues(connectorId,
 997         configuredMeterValueSampleInterval ? Utils.convertToInt(configuredMeterValueSampleInterval.value) * 1000 : 60000);
 998     } else {
 999       logger.error(this._logPrefix() + ' Starting transaction id ' + payload.transactionId.toString() + ' REJECTED with status ' + payload.idTagInfo.status + ', idTag ' + requestPayload.idTag);
1000       this._resetTransactionOnConnector(connectorId);
1001       await this.sendStatusNotification(connectorId, ChargePointStatus.AVAILABLE);
1002     }
1003   }
1004
1005   async handleResponseStopTransaction(payload: StopTransactionResponse, requestPayload: StopTransactionRequest): Promise<void> {
1006     let transactionConnectorId: number;
1007     for (const connector in this._connectors) {
1008       if (Utils.convertToInt(connector) > 0 && this.getConnector(Utils.convertToInt(connector))?.transactionId === requestPayload.transactionId) {
1009         transactionConnectorId = Utils.convertToInt(connector);
1010         break;
1011       }
1012     }
1013     if (!transactionConnectorId) {
1014       logger.error(this._logPrefix() + ' Trying to stop a non existing transaction ' + requestPayload.transactionId.toString());
1015       return;
1016     }
1017     if (payload.idTagInfo?.status === AuthorizationStatus.ACCEPTED) {
1018       await this.sendStatusNotification(transactionConnectorId, ChargePointStatus.AVAILABLE);
1019       if (this._stationInfo.powerSharedByConnectors) {
1020         this._stationInfo.powerDivider--;
1021       }
1022       logger.info(this._logPrefix() + ' Transaction ' + requestPayload.transactionId.toString() + ' STOPPED on ' + this._stationInfo.name + '#' + transactionConnectorId.toString());
1023       this._resetTransactionOnConnector(transactionConnectorId);
1024     } else {
1025       logger.error(this._logPrefix() + ' Stopping transaction id ' + requestPayload.transactionId.toString() + ' REJECTED with status ' + payload.idTagInfo?.status);
1026     }
1027   }
1028
1029   handleResponseStatusNotification(payload: StatusNotificationRequest, requestPayload: StatusNotificationResponse): void {
1030     logger.debug(this._logPrefix() + ' Status notification response received: %j to StatusNotification request: %j', payload, requestPayload);
1031   }
1032
1033   handleResponseMeterValues(payload: MeterValuesRequest, requestPayload: MeterValuesResponse): void {
1034     logger.debug(this._logPrefix() + ' MeterValues response received: %j to MeterValues request: %j', payload, requestPayload);
1035   }
1036
1037   handleResponseHeartbeat(payload: HeartbeatResponse, requestPayload: HeartbeatRequest): void {
1038     logger.debug(this._logPrefix() + ' Heartbeat response received: %j to Heartbeat request: %j', payload, requestPayload);
1039   }
1040
1041   async handleRequest(messageId: string, commandName: IncomingRequestCommand, commandPayload): Promise<void> {
1042     let response;
1043     // Call
1044     if (typeof this['handleRequest' + commandName] === 'function') {
1045       try {
1046         // Call the method to build the response
1047         response = await this['handleRequest' + commandName](commandPayload);
1048       } catch (error) {
1049         // Log
1050         logger.error(this._logPrefix() + ' Handle request error: %j', error);
1051         // Send back response to inform backend
1052         await this.sendError(messageId, error, commandName);
1053         throw error;
1054       }
1055     } else {
1056       // Throw exception
1057       await this.sendError(messageId, new OCPPError(ErrorType.NOT_IMPLEMENTED, `${commandName} is not implemented`, {}), commandName);
1058       throw new Error(`${commandName} is not implemented ${JSON.stringify(commandPayload, null, ' ')}`);
1059     }
1060     // Send response
1061     await this.sendMessage(messageId, response, MessageType.CALL_RESULT_MESSAGE, commandName);
1062   }
1063
1064   // Simulate charging station restart
1065   handleRequestReset(commandPayload: ResetRequest): DefaultResponse {
1066     setImmediate(async () => {
1067       await this.stop(commandPayload.type + 'Reset' as StopTransactionReason);
1068       await Utils.sleep(this._stationInfo.resetTime);
1069       await this.start();
1070     });
1071     logger.info(`${this._logPrefix()} ${commandPayload.type} reset command received, simulating it. The station will be back online in ${Utils.milliSecondsToHHMMSS(this._stationInfo.resetTime)}`);
1072     return Constants.OCPP_RESPONSE_ACCEPTED;
1073   }
1074
1075   handleRequestClearCache(): DefaultResponse {
1076     return Constants.OCPP_RESPONSE_ACCEPTED;
1077   }
1078
1079   async handleRequestUnlockConnector(commandPayload: UnlockConnectorRequest): Promise<UnlockConnectorResponse> {
1080     const connectorId = commandPayload.connectorId;
1081     if (connectorId === 0) {
1082       logger.error(this._logPrefix() + ' Trying to unlock connector ' + connectorId.toString());
1083       return Constants.OCPP_RESPONSE_UNLOCK_NOT_SUPPORTED;
1084     }
1085     if (this.getConnector(connectorId)?.transactionStarted) {
1086       const stopResponse = await this.sendStopTransaction(this.getConnector(connectorId).transactionId, StopTransactionReason.UNLOCK_COMMAND);
1087       if (stopResponse.idTagInfo?.status === AuthorizationStatus.ACCEPTED) {
1088         return Constants.OCPP_RESPONSE_UNLOCKED;
1089       }
1090       return Constants.OCPP_RESPONSE_UNLOCK_FAILED;
1091     }
1092     await this.sendStatusNotification(connectorId, ChargePointStatus.AVAILABLE);
1093     return Constants.OCPP_RESPONSE_UNLOCKED;
1094   }
1095
1096   _getConfigurationKey(key: string | StandardParametersKey, caseInsensitive = false): ConfigurationKey {
1097     const configurationKey: ConfigurationKey = this._configuration.configurationKey.find((configElement) => {
1098       if (caseInsensitive) {
1099         return configElement.key.toLowerCase() === key.toLowerCase();
1100       }
1101       return configElement.key === key;
1102     });
1103     return configurationKey;
1104   }
1105
1106   _addConfigurationKey(key: string | StandardParametersKey, value: string, readonly = false, visible = true, reboot = false): void {
1107     const keyFound = this._getConfigurationKey(key);
1108     if (!keyFound) {
1109       this._configuration.configurationKey.push({
1110         key,
1111         readonly,
1112         value,
1113         visible,
1114         reboot,
1115       });
1116     } else {
1117       logger.error(`${this._logPrefix()} Trying to add an already existing configuration key: %j`, keyFound);
1118     }
1119   }
1120
1121   _setConfigurationKeyValue(key: string | StandardParametersKey, value: string): void {
1122     const keyFound = this._getConfigurationKey(key);
1123     if (keyFound) {
1124       const keyIndex = this._configuration.configurationKey.indexOf(keyFound);
1125       this._configuration.configurationKey[keyIndex].value = value;
1126     } else {
1127       logger.error(`${this._logPrefix()} Trying to set a value on a non existing configuration key: %j`, { key, value });
1128     }
1129   }
1130
1131   handleRequestGetConfiguration(commandPayload: GetConfigurationRequest): GetConfigurationResponse {
1132     const configurationKey: OCPPConfigurationKey[] = [];
1133     const unknownKey: string[] = [];
1134     if (Utils.isEmptyArray(commandPayload.key)) {
1135       for (const configuration of this._configuration.configurationKey) {
1136         if (Utils.isUndefined(configuration.visible)) {
1137           configuration.visible = true;
1138         }
1139         if (!configuration.visible) {
1140           continue;
1141         }
1142         configurationKey.push({
1143           key: configuration.key,
1144           readonly: configuration.readonly,
1145           value: configuration.value,
1146         });
1147       }
1148     } else {
1149       for (const key of commandPayload.key) {
1150         const keyFound = this._getConfigurationKey(key);
1151         if (keyFound) {
1152           if (Utils.isUndefined(keyFound.visible)) {
1153             keyFound.visible = true;
1154           }
1155           if (!keyFound.visible) {
1156             continue;
1157           }
1158           configurationKey.push({
1159             key: keyFound.key,
1160             readonly: keyFound.readonly,
1161             value: keyFound.value,
1162           });
1163         } else {
1164           unknownKey.push(key);
1165         }
1166       }
1167     }
1168     return {
1169       configurationKey,
1170       unknownKey,
1171     };
1172   }
1173
1174   handleRequestChangeConfiguration(commandPayload: ChangeConfigurationRequest): ChangeConfigurationResponse {
1175     // JSON request fields type sanity check
1176     if (!Utils.isString(commandPayload.key)) {
1177       logger.error(`${this._logPrefix()} ChangeConfiguration request key field is not a string:`, commandPayload);
1178     }
1179     if (!Utils.isString(commandPayload.value)) {
1180       logger.error(`${this._logPrefix()} ChangeConfiguration request value field is not a string:`, commandPayload);
1181     }
1182     const keyToChange = this._getConfigurationKey(commandPayload.key, true);
1183     if (!keyToChange) {
1184       return Constants.OCPP_CONFIGURATION_RESPONSE_NOT_SUPPORTED;
1185     } else if (keyToChange && keyToChange.readonly) {
1186       return Constants.OCPP_CONFIGURATION_RESPONSE_REJECTED;
1187     } else if (keyToChange && !keyToChange.readonly) {
1188       const keyIndex = this._configuration.configurationKey.indexOf(keyToChange);
1189       let valueChanged = false;
1190       if (this._configuration.configurationKey[keyIndex].value !== commandPayload.value) {
1191         this._configuration.configurationKey[keyIndex].value = commandPayload.value;
1192         valueChanged = true;
1193       }
1194       let triggerHeartbeatRestart = false;
1195       if (keyToChange.key === StandardParametersKey.HeartBeatInterval && valueChanged) {
1196         this._setConfigurationKeyValue(StandardParametersKey.HeartbeatInterval, commandPayload.value);
1197         triggerHeartbeatRestart = true;
1198       }
1199       if (keyToChange.key === StandardParametersKey.HeartbeatInterval && valueChanged) {
1200         this._setConfigurationKeyValue(StandardParametersKey.HeartBeatInterval, commandPayload.value);
1201         triggerHeartbeatRestart = true;
1202       }
1203       if (triggerHeartbeatRestart) {
1204         this._restartHeartbeat();
1205       }
1206       if (keyToChange.key === StandardParametersKey.WebSocketPingInterval && valueChanged) {
1207         this._restartWebSocketPing();
1208       }
1209       if (keyToChange.reboot) {
1210         return Constants.OCPP_CONFIGURATION_RESPONSE_REBOOT_REQUIRED;
1211       }
1212       return Constants.OCPP_CONFIGURATION_RESPONSE_ACCEPTED;
1213     }
1214   }
1215
1216   handleRequestSetChargingProfile(commandPayload: SetChargingProfileRequest): SetChargingProfileResponse {
1217     if (!this.getConnector(commandPayload.connectorId)) {
1218       logger.error(`${this._logPrefix()} Trying to set a charging profile to a non existing connector Id ${commandPayload.connectorId}`);
1219       return Constants.OCPP_CHARGING_PROFILE_RESPONSE_REJECTED;
1220     }
1221     if (commandPayload.csChargingProfiles.chargingProfilePurpose === ChargingProfilePurposeType.TX_PROFILE && !this.getConnector(commandPayload.connectorId)?.transactionStarted) {
1222       return Constants.OCPP_CHARGING_PROFILE_RESPONSE_REJECTED;
1223     }
1224     this.getConnector(commandPayload.connectorId).chargingProfiles.forEach((chargingProfile: ChargingProfile, index: number) => {
1225       if (chargingProfile.chargingProfileId === commandPayload.csChargingProfiles.chargingProfileId
1226         || (chargingProfile.stackLevel === commandPayload.csChargingProfiles.stackLevel && chargingProfile.chargingProfilePurpose === commandPayload.csChargingProfiles.chargingProfilePurpose)) {
1227         this.getConnector(commandPayload.connectorId).chargingProfiles[index] = chargingProfile;
1228         return Constants.OCPP_CHARGING_PROFILE_RESPONSE_ACCEPTED;
1229       }
1230     });
1231     this.getConnector(commandPayload.connectorId).chargingProfiles.push(commandPayload.csChargingProfiles);
1232     return Constants.OCPP_CHARGING_PROFILE_RESPONSE_ACCEPTED;
1233   }
1234
1235   // FIXME: Handle properly the transaction started case
1236   handleRequestChangeAvailability(commandPayload: ChangeAvailabilityRequest): ChangeAvailabilityResponse {
1237     const connectorId: number = commandPayload.connectorId;
1238     if (!this.getConnector(connectorId)) {
1239       logger.error(`${this._logPrefix()} Trying to change the availability of a non existing connector Id ${connectorId.toString()}`);
1240       return Constants.OCPP_AVAILABILITY_RESPONSE_REJECTED;
1241     }
1242     const chargePointStatus: ChargePointStatus = commandPayload.type === AvailabilityType.OPERATIVE ? ChargePointStatus.AVAILABLE : ChargePointStatus.UNAVAILABLE;
1243     if (connectorId === 0) {
1244       let response: ChangeAvailabilityResponse = Constants.OCPP_AVAILABILITY_RESPONSE_ACCEPTED;
1245       for (const connector in this._connectors) {
1246         if (this.getConnector(Utils.convertToInt(connector)).transactionStarted) {
1247           response = Constants.OCPP_AVAILABILITY_RESPONSE_SCHEDULED;
1248         }
1249         this.getConnector(Utils.convertToInt(connector)).availability = commandPayload.type;
1250         void this.sendStatusNotification(Utils.convertToInt(connector), chargePointStatus);
1251       }
1252       return response;
1253     } else if (connectorId > 0 && (this.getConnector(0).availability === AvailabilityType.OPERATIVE || (this.getConnector(0).availability === AvailabilityType.INOPERATIVE && commandPayload.type === AvailabilityType.INOPERATIVE))) {
1254       if (this.getConnector(connectorId)?.transactionStarted) {
1255         this.getConnector(connectorId).availability = commandPayload.type;
1256         void this.sendStatusNotification(connectorId, chargePointStatus);
1257         return Constants.OCPP_AVAILABILITY_RESPONSE_SCHEDULED;
1258       }
1259       this.getConnector(connectorId).availability = commandPayload.type;
1260       void this.sendStatusNotification(connectorId, chargePointStatus);
1261       return Constants.OCPP_AVAILABILITY_RESPONSE_ACCEPTED;
1262     }
1263     return Constants.OCPP_AVAILABILITY_RESPONSE_REJECTED;
1264   }
1265
1266   async handleRequestRemoteStartTransaction(commandPayload: RemoteStartTransactionRequest): Promise<DefaultResponse> {
1267     const transactionConnectorID: number = commandPayload.connectorId ? commandPayload.connectorId : 1;
1268     if (this._getAuthorizeRemoteTxRequests() && this._getLocalAuthListEnabled() && this.hasAuthorizedTags()) {
1269       // Check if authorized
1270       if (this._authorizedTags.find((value) => value === commandPayload.idTag)) {
1271         await this.sendStatusNotification(transactionConnectorID, ChargePointStatus.PREPARING);
1272         // Authorization successful start transaction
1273         await this.sendStartTransaction(transactionConnectorID, commandPayload.idTag);
1274         logger.debug(this._logPrefix() + ' Transaction remotely STARTED on ' + this._stationInfo.name + '#' + transactionConnectorID.toString() + ' for idTag ' + commandPayload.idTag);
1275         return Constants.OCPP_RESPONSE_ACCEPTED;
1276       }
1277       logger.error(this._logPrefix() + ' Remote starting transaction REJECTED, idTag ' + commandPayload.idTag);
1278       return Constants.OCPP_RESPONSE_REJECTED;
1279     }
1280     await this.sendStatusNotification(transactionConnectorID, ChargePointStatus.PREPARING);
1281     // No local authorization check required => start transaction
1282     await this.sendStartTransaction(transactionConnectorID, commandPayload.idTag);
1283     logger.debug(this._logPrefix() + ' Transaction remotely STARTED on ' + this._stationInfo.name + '#' + transactionConnectorID.toString() + ' for idTag ' + commandPayload.idTag);
1284     return Constants.OCPP_RESPONSE_ACCEPTED;
1285   }
1286
1287   async handleRequestRemoteStopTransaction(commandPayload: RemoteStopTransactionRequest): Promise<DefaultResponse> {
1288     const transactionId = commandPayload.transactionId;
1289     for (const connector in this._connectors) {
1290       if (Utils.convertToInt(connector) > 0 && this.getConnector(Utils.convertToInt(connector))?.transactionId === transactionId) {
1291         await this.sendStatusNotification(Utils.convertToInt(connector), ChargePointStatus.FINISHING);
1292         await this.sendStopTransaction(transactionId);
1293         return Constants.OCPP_RESPONSE_ACCEPTED;
1294       }
1295     }
1296     logger.info(this._logPrefix() + ' Trying to remote stop a non existing transaction ' + transactionId.toString());
1297     return Constants.OCPP_RESPONSE_REJECTED;
1298   }
1299
1300   // eslint-disable-next-line consistent-this
1301   private async sendMeterValues(connectorId: number, interval: number, self: ChargingStation, debug = false): Promise<void> {
1302     try {
1303       const meterValue: MeterValue = {
1304         timestamp: new Date().toISOString(),
1305         sampledValue: [],
1306       };
1307       const meterValuesTemplate: SampledValue[] = self.getConnector(connectorId).MeterValues;
1308       for (let index = 0; index < meterValuesTemplate.length; index++) {
1309         const connector = self.getConnector(connectorId);
1310         // SoC measurand
1311         if (meterValuesTemplate[index].measurand && meterValuesTemplate[index].measurand === MeterValueMeasurand.STATE_OF_CHARGE && self._getConfigurationKey(StandardParametersKey.MeterValuesSampledData).value.includes(MeterValueMeasurand.STATE_OF_CHARGE)) {
1312           meterValue.sampledValue.push({
1313             ...!Utils.isUndefined(meterValuesTemplate[index].unit) ? { unit: meterValuesTemplate[index].unit } : { unit: MeterValueUnit.PERCENT },
1314             ...!Utils.isUndefined(meterValuesTemplate[index].context) && { context: meterValuesTemplate[index].context },
1315             measurand: meterValuesTemplate[index].measurand,
1316             ...!Utils.isUndefined(meterValuesTemplate[index].location) ? { location: meterValuesTemplate[index].location } : { location: MeterValueLocation.EV },
1317             ...!Utils.isUndefined(meterValuesTemplate[index].value) ? { value: meterValuesTemplate[index].value } : { value: Utils.getRandomInt(100).toString() },
1318           });
1319           const sampledValuesIndex = meterValue.sampledValue.length - 1;
1320           if (Utils.convertToInt(meterValue.sampledValue[sampledValuesIndex].value) > 100 || debug) {
1321             logger.error(`${self._logPrefix()} MeterValues measurand ${meterValue.sampledValue[sampledValuesIndex].measurand ? meterValue.sampledValue[sampledValuesIndex].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: connectorId ${connectorId}, transaction ${connector.transactionId}, value: ${meterValue.sampledValue[sampledValuesIndex].value}/100`);
1322           }
1323         // Voltage measurand
1324         } else if (meterValuesTemplate[index].measurand && meterValuesTemplate[index].measurand === MeterValueMeasurand.VOLTAGE && self._getConfigurationKey(StandardParametersKey.MeterValuesSampledData).value.includes(MeterValueMeasurand.VOLTAGE)) {
1325           const voltageMeasurandValue = Utils.getRandomFloatRounded(self._getVoltageOut() + self._getVoltageOut() * 0.1, self._getVoltageOut() - self._getVoltageOut() * 0.1);
1326           meterValue.sampledValue.push({
1327             ...!Utils.isUndefined(meterValuesTemplate[index].unit) ? { unit: meterValuesTemplate[index].unit } : { unit: MeterValueUnit.VOLT },
1328             ...!Utils.isUndefined(meterValuesTemplate[index].context) && { context: meterValuesTemplate[index].context },
1329             measurand: meterValuesTemplate[index].measurand,
1330             ...!Utils.isUndefined(meterValuesTemplate[index].location) && { location: meterValuesTemplate[index].location },
1331             ...!Utils.isUndefined(meterValuesTemplate[index].value) ? { value: meterValuesTemplate[index].value } : { value: voltageMeasurandValue.toString() },
1332           });
1333           for (let phase = 1; self._getNumberOfPhases() === 3 && phase <= self._getNumberOfPhases(); phase++) {
1334             let phaseValue: string;
1335             if (self._getVoltageOut() >= 0 && self._getVoltageOut() <= 250) {
1336               phaseValue = `L${phase}-N`;
1337             } else if (self._getVoltageOut() > 250) {
1338               phaseValue = `L${phase}-L${(phase + 1) % self._getNumberOfPhases() !== 0 ? (phase + 1) % self._getNumberOfPhases() : self._getNumberOfPhases()}`;
1339             }
1340             meterValue.sampledValue.push({
1341               ...!Utils.isUndefined(meterValuesTemplate[index].unit) ? { unit: meterValuesTemplate[index].unit } : { unit: MeterValueUnit.VOLT },
1342               ...!Utils.isUndefined(meterValuesTemplate[index].context) && { context: meterValuesTemplate[index].context },
1343               measurand: meterValuesTemplate[index].measurand,
1344               ...!Utils.isUndefined(meterValuesTemplate[index].location) && { location: meterValuesTemplate[index].location },
1345               ...!Utils.isUndefined(meterValuesTemplate[index].value) ? { value: meterValuesTemplate[index].value } : { value: voltageMeasurandValue.toString() },
1346               phase: phaseValue as MeterValuePhase,
1347             });
1348           }
1349         // Power.Active.Import measurand
1350         } else if (meterValuesTemplate[index].measurand && meterValuesTemplate[index].measurand === MeterValueMeasurand.POWER_ACTIVE_IMPORT && self._getConfigurationKey(StandardParametersKey.MeterValuesSampledData).value.includes(MeterValueMeasurand.POWER_ACTIVE_IMPORT)) {
1351           // FIXME: factor out powerDivider checks
1352           if (Utils.isUndefined(self._stationInfo.powerDivider)) {
1353             const errMsg = `${self._logPrefix()} MeterValues measurand ${meterValuesTemplate[index].measurand ? meterValuesTemplate[index].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: powerDivider is undefined`;
1354             logger.error(errMsg);
1355             throw Error(errMsg);
1356           } else if (self._stationInfo.powerDivider && self._stationInfo.powerDivider <= 0) {
1357             const errMsg = `${self._logPrefix()} MeterValues measurand ${meterValuesTemplate[index].measurand ? meterValuesTemplate[index].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: powerDivider have zero or below value ${self._stationInfo.powerDivider}`;
1358             logger.error(errMsg);
1359             throw Error(errMsg);
1360           }
1361           const errMsg = `${self._logPrefix()} MeterValues measurand ${meterValuesTemplate[index].measurand ? meterValuesTemplate[index].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: Unknown ${self._getPowerOutType()} powerOutType in template file ${self._stationTemplateFile}, cannot calculate ${meterValuesTemplate[index].measurand ? meterValuesTemplate[index].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER} measurand value`;
1362           const powerMeasurandValues = {} as MeasurandValues;
1363           const maxPower = Math.round(self._stationInfo.maxPower / self._stationInfo.powerDivider);
1364           const maxPowerPerPhase = Math.round((self._stationInfo.maxPower / self._stationInfo.powerDivider) / self._getNumberOfPhases());
1365           switch (self._getPowerOutType()) {
1366             case PowerOutType.AC:
1367               if (Utils.isUndefined(meterValuesTemplate[index].value)) {
1368                 powerMeasurandValues.L1 = Utils.getRandomFloatRounded(maxPowerPerPhase);
1369                 powerMeasurandValues.L2 = 0;
1370                 powerMeasurandValues.L3 = 0;
1371                 if (self._getNumberOfPhases() === 3) {
1372                   powerMeasurandValues.L2 = Utils.getRandomFloatRounded(maxPowerPerPhase);
1373                   powerMeasurandValues.L3 = Utils.getRandomFloatRounded(maxPowerPerPhase);
1374                 }
1375                 powerMeasurandValues.allPhases = Utils.roundTo(powerMeasurandValues.L1 + powerMeasurandValues.L2 + powerMeasurandValues.L3, 2);
1376               }
1377               break;
1378             case PowerOutType.DC:
1379               if (Utils.isUndefined(meterValuesTemplate[index].value)) {
1380                 powerMeasurandValues.allPhases = Utils.getRandomFloatRounded(maxPower);
1381               }
1382               break;
1383             default:
1384               logger.error(errMsg);
1385               throw Error(errMsg);
1386           }
1387           meterValue.sampledValue.push({
1388             ...!Utils.isUndefined(meterValuesTemplate[index].unit) ? { unit: meterValuesTemplate[index].unit } : { unit: MeterValueUnit.WATT },
1389             ...!Utils.isUndefined(meterValuesTemplate[index].context) && { context: meterValuesTemplate[index].context },
1390             measurand: meterValuesTemplate[index].measurand,
1391             ...!Utils.isUndefined(meterValuesTemplate[index].location) && { location: meterValuesTemplate[index].location },
1392             ...!Utils.isUndefined(meterValuesTemplate[index].value) ? { value: meterValuesTemplate[index].value } : { value: powerMeasurandValues.allPhases.toString() },
1393           });
1394           const sampledValuesIndex = meterValue.sampledValue.length - 1;
1395           if (Utils.convertToFloat(meterValue.sampledValue[sampledValuesIndex].value) > maxPower || debug) {
1396             logger.error(`${self._logPrefix()} MeterValues measurand ${meterValue.sampledValue[sampledValuesIndex].measurand ? meterValue.sampledValue[sampledValuesIndex].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: connectorId ${connectorId}, transaction ${connector.transactionId}, value: ${meterValue.sampledValue[sampledValuesIndex].value}/${maxPower}`);
1397           }
1398           for (let phase = 1; self._getNumberOfPhases() === 3 && phase <= self._getNumberOfPhases(); phase++) {
1399             const phaseValue = `L${phase}-N`;
1400             meterValue.sampledValue.push({
1401               ...!Utils.isUndefined(meterValuesTemplate[index].unit) ? { unit: meterValuesTemplate[index].unit } : { unit: MeterValueUnit.WATT },
1402               ...!Utils.isUndefined(meterValuesTemplate[index].context) && { context: meterValuesTemplate[index].context },
1403               ...!Utils.isUndefined(meterValuesTemplate[index].measurand) && { measurand: meterValuesTemplate[index].measurand },
1404               ...!Utils.isUndefined(meterValuesTemplate[index].location) && { location: meterValuesTemplate[index].location },
1405               ...!Utils.isUndefined(meterValuesTemplate[index].value) ? { value: meterValuesTemplate[index].value } : { value: powerMeasurandValues[`L${phase}`] as string },
1406               phase: phaseValue as MeterValuePhase,
1407             });
1408           }
1409         // Current.Import measurand
1410         } else if (meterValuesTemplate[index].measurand && meterValuesTemplate[index].measurand === MeterValueMeasurand.CURRENT_IMPORT && self._getConfigurationKey(StandardParametersKey.MeterValuesSampledData).value.includes(MeterValueMeasurand.CURRENT_IMPORT)) {
1411           // FIXME: factor out powerDivider checks
1412           if (Utils.isUndefined(self._stationInfo.powerDivider)) {
1413             const errMsg = `${self._logPrefix()} MeterValues measurand ${meterValuesTemplate[index].measurand ? meterValuesTemplate[index].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: powerDivider is undefined`;
1414             logger.error(errMsg);
1415             throw Error(errMsg);
1416           } else if (self._stationInfo.powerDivider && self._stationInfo.powerDivider <= 0) {
1417             const errMsg = `${self._logPrefix()} MeterValues measurand ${meterValuesTemplate[index].measurand ? meterValuesTemplate[index].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: powerDivider have zero or below value ${self._stationInfo.powerDivider}`;
1418             logger.error(errMsg);
1419             throw Error(errMsg);
1420           }
1421           const errMsg = `${self._logPrefix()} MeterValues measurand ${meterValuesTemplate[index].measurand ? meterValuesTemplate[index].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: Unknown ${self._getPowerOutType()} powerOutType in template file ${self._stationTemplateFile}, cannot calculate ${meterValuesTemplate[index].measurand ? meterValuesTemplate[index].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER} measurand value`;
1422           const currentMeasurandValues: MeasurandValues = {} as MeasurandValues;
1423           let maxAmperage: number;
1424           switch (self._getPowerOutType()) {
1425             case PowerOutType.AC:
1426               maxAmperage = ElectricUtils.ampPerPhaseFromPower(self._getNumberOfPhases(), self._stationInfo.maxPower / self._stationInfo.powerDivider, self._getVoltageOut());
1427               if (Utils.isUndefined(meterValuesTemplate[index].value)) {
1428                 currentMeasurandValues.L1 = Utils.getRandomFloatRounded(maxAmperage);
1429                 currentMeasurandValues.L2 = 0;
1430                 currentMeasurandValues.L3 = 0;
1431                 if (self._getNumberOfPhases() === 3) {
1432                   currentMeasurandValues.L2 = Utils.getRandomFloatRounded(maxAmperage);
1433                   currentMeasurandValues.L3 = Utils.getRandomFloatRounded(maxAmperage);
1434                 }
1435                 currentMeasurandValues.allPhases = Utils.roundTo((currentMeasurandValues.L1 + currentMeasurandValues.L2 + currentMeasurandValues.L3) / self._getNumberOfPhases(), 2);
1436               }
1437               break;
1438             case PowerOutType.DC:
1439               maxAmperage = ElectricUtils.ampTotalFromPower(self._stationInfo.maxPower / self._stationInfo.powerDivider, self._getVoltageOut());
1440               if (Utils.isUndefined(meterValuesTemplate[index].value)) {
1441                 currentMeasurandValues.allPhases = Utils.getRandomFloatRounded(maxAmperage);
1442               }
1443               break;
1444             default:
1445               logger.error(errMsg);
1446               throw Error(errMsg);
1447           }
1448           meterValue.sampledValue.push({
1449             ...!Utils.isUndefined(meterValuesTemplate[index].unit) ? { unit: meterValuesTemplate[index].unit } : { unit: MeterValueUnit.AMP },
1450             ...!Utils.isUndefined(meterValuesTemplate[index].context) && { context: meterValuesTemplate[index].context },
1451             measurand: meterValuesTemplate[index].measurand,
1452             ...!Utils.isUndefined(meterValuesTemplate[index].location) && { location: meterValuesTemplate[index].location },
1453             ...!Utils.isUndefined(meterValuesTemplate[index].value) ? { value: meterValuesTemplate[index].value } : { value: currentMeasurandValues.allPhases.toString() },
1454           });
1455           const sampledValuesIndex = meterValue.sampledValue.length - 1;
1456           if (Utils.convertToFloat(meterValue.sampledValue[sampledValuesIndex].value) > maxAmperage || debug) {
1457             logger.error(`${self._logPrefix()} MeterValues measurand ${meterValue.sampledValue[sampledValuesIndex].measurand ? meterValue.sampledValue[sampledValuesIndex].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: connectorId ${connectorId}, transaction ${connector.transactionId}, value: ${meterValue.sampledValue[sampledValuesIndex].value}/${maxAmperage}`);
1458           }
1459           for (let phase = 1; self._getNumberOfPhases() === 3 && phase <= self._getNumberOfPhases(); phase++) {
1460             const phaseValue = `L${phase}`;
1461             meterValue.sampledValue.push({
1462               ...!Utils.isUndefined(meterValuesTemplate[index].unit) ? { unit: meterValuesTemplate[index].unit } : { unit: MeterValueUnit.AMP },
1463               ...!Utils.isUndefined(meterValuesTemplate[index].context) && { context: meterValuesTemplate[index].context },
1464               ...!Utils.isUndefined(meterValuesTemplate[index].measurand) && { measurand: meterValuesTemplate[index].measurand },
1465               ...!Utils.isUndefined(meterValuesTemplate[index].location) && { location: meterValuesTemplate[index].location },
1466               ...!Utils.isUndefined(meterValuesTemplate[index].value) ? { value: meterValuesTemplate[index].value } : { value: currentMeasurandValues[phaseValue] as string },
1467               phase: phaseValue as MeterValuePhase,
1468             });
1469           }
1470         // Energy.Active.Import.Register measurand (default)
1471         } else if (!meterValuesTemplate[index].measurand || meterValuesTemplate[index].measurand === MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER) {
1472           // FIXME: factor out powerDivider checks
1473           if (Utils.isUndefined(self._stationInfo.powerDivider)) {
1474             const errMsg = `${self._logPrefix()} MeterValues measurand ${meterValuesTemplate[index].measurand ? meterValuesTemplate[index].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: powerDivider is undefined`;
1475             logger.error(errMsg);
1476             throw Error(errMsg);
1477           } else if (self._stationInfo.powerDivider && self._stationInfo.powerDivider <= 0) {
1478             const errMsg = `${self._logPrefix()} MeterValues measurand ${meterValuesTemplate[index].measurand ? meterValuesTemplate[index].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: powerDivider have zero or below value ${self._stationInfo.powerDivider}`;
1479             logger.error(errMsg);
1480             throw Error(errMsg);
1481           }
1482           if (Utils.isUndefined(meterValuesTemplate[index].value)) {
1483             const measurandValue = Utils.getRandomInt(self._stationInfo.maxPower / (self._stationInfo.powerDivider * 3600000) * interval);
1484             // Persist previous value in connector
1485             if (connector && !Utils.isNullOrUndefined(connector.lastEnergyActiveImportRegisterValue) && connector.lastEnergyActiveImportRegisterValue >= 0) {
1486               connector.lastEnergyActiveImportRegisterValue += measurandValue;
1487             } else {
1488               connector.lastEnergyActiveImportRegisterValue = 0;
1489             }
1490           }
1491           meterValue.sampledValue.push({
1492             ...!Utils.isUndefined(meterValuesTemplate[index].unit) ? { unit: meterValuesTemplate[index].unit } : { unit: MeterValueUnit.WATT_HOUR },
1493             ...!Utils.isUndefined(meterValuesTemplate[index].context) && { context: meterValuesTemplate[index].context },
1494             ...!Utils.isUndefined(meterValuesTemplate[index].measurand) && { measurand: meterValuesTemplate[index].measurand },
1495             ...!Utils.isUndefined(meterValuesTemplate[index].location) && { location: meterValuesTemplate[index].location },
1496             ...!Utils.isUndefined(meterValuesTemplate[index].value) ? { value: meterValuesTemplate[index].value } :
1497               { value: connector.lastEnergyActiveImportRegisterValue.toString() },
1498           });
1499           const sampledValuesIndex = meterValue.sampledValue.length - 1;
1500           const maxConsumption = Math.round(self._stationInfo.maxPower * 3600 / (self._stationInfo.powerDivider * interval));
1501           if (Utils.convertToFloat(meterValue.sampledValue[sampledValuesIndex].value) > maxConsumption || debug) {
1502             logger.error(`${self._logPrefix()} MeterValues measurand ${meterValue.sampledValue[sampledValuesIndex].measurand ? meterValue.sampledValue[sampledValuesIndex].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER}: connectorId ${connectorId}, transaction ${connector.transactionId}, value: ${meterValue.sampledValue[sampledValuesIndex].value}/${maxConsumption}`);
1503           }
1504         // Unsupported measurand
1505         } else {
1506           logger.info(`${self._logPrefix()} Unsupported MeterValues measurand ${meterValuesTemplate[index].measurand ? meterValuesTemplate[index].measurand : MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER} on connectorId ${connectorId}`);
1507         }
1508       }
1509       const payload: MeterValuesRequest = {
1510         connectorId,
1511         transactionId: self.getConnector(connectorId).transactionId,
1512         meterValue: meterValue,
1513       };
1514       await self.sendMessage(Utils.generateUUID(), payload, MessageType.CALL_MESSAGE, RequestCommand.METERVALUES);
1515     } catch (error) {
1516       this.handleRequestError(RequestCommand.METERVALUES, error);
1517     }
1518   }
1519
1520   private handleRequestError(commandName: RequestCommand, error: Error) {
1521     logger.error(this._logPrefix() + ' Send ' + commandName + ' error: %j', error);
1522     throw error;
1523   }
1524 }
1525