fix: make ESM bundle work
[e-mobility-charging-stations-simulator.git] / src / charging-station / ocpp / 1.6 / OCPP16IncomingRequestService.ts
index 4ef74b04c85ec43addbd86484f5bae922653c4c5..8b23eddd1e0820c118a8b8242aaa31f413fe7353 100644 (file)
@@ -1,94 +1,96 @@
-// Partial Copyright Jerome Benoit. 2021. All Rights Reserved.
+// Partial Copyright Jerome Benoit. 2021-2023. All Rights Reserved.
 
+import fs from 'node:fs';
+import path from 'node:path';
+import { URL, fileURLToPath } from 'node:url';
+
+import type { JSONSchemaType } from 'ajv';
+import { Client, type FTPResponse } from 'basic-ftp';
+import tar from 'tar';
+
+import {
+  type ChargingStation,
+  ChargingStationConfigurationUtils,
+  ChargingStationUtils,
+} from '../../../charging-station';
+import { OCPPError } from '../../../exception';
 import {
-  ChangeAvailabilityRequest,
-  ChangeConfigurationRequest,
-  ClearChargingProfileRequest,
-  DiagnosticsStatusNotificationRequest,
-  GetConfigurationRequest,
-  GetDiagnosticsRequest,
-  MessageTrigger,
+  type ChangeAvailabilityRequest,
+  type ChangeAvailabilityResponse,
+  type ChangeConfigurationRequest,
+  type ChangeConfigurationResponse,
+  type ClearChargingProfileRequest,
+  type ClearChargingProfileResponse,
+  ErrorType,
+  type GenericResponse,
+  type GetConfigurationRequest,
+  type GetConfigurationResponse,
+  type GetDiagnosticsRequest,
+  type GetDiagnosticsResponse,
+  type IncomingRequestHandler,
+  type JsonObject,
+  type JsonType,
+  OCPP16AuthorizationStatus,
+  type OCPP16AuthorizeRequest,
+  type OCPP16AuthorizeResponse,
   OCPP16AvailabilityType,
-  OCPP16BootNotificationRequest,
-  OCPP16HeartbeatRequest,
+  type OCPP16BootNotificationRequest,
+  type OCPP16BootNotificationResponse,
+  OCPP16ChargePointErrorCode,
+  OCPP16ChargePointStatus,
+  type OCPP16ChargingProfile,
+  OCPP16ChargingProfilePurposeType,
+  type OCPP16ClearCacheRequest,
+  type OCPP16DataTransferRequest,
+  type OCPP16DataTransferResponse,
+  OCPP16DataTransferStatus,
+  OCPP16DataTransferVendorId,
+  OCPP16DiagnosticsStatus,
+  type OCPP16DiagnosticsStatusNotificationRequest,
+  type OCPP16DiagnosticsStatusNotificationResponse,
+  OCPP16FirmwareStatus,
+  type OCPP16FirmwareStatusNotificationRequest,
+  type OCPP16FirmwareStatusNotificationResponse,
+  type OCPP16HeartbeatRequest,
+  type OCPP16HeartbeatResponse,
   OCPP16IncomingRequestCommand,
+  OCPP16MessageTrigger,
   OCPP16RequestCommand,
-  OCPP16StatusNotificationRequest,
-  OCPP16TriggerMessageRequest,
-  RemoteStartTransactionRequest,
-  RemoteStopTransactionRequest,
-  ResetRequest,
-  SetChargingProfileRequest,
-  UnlockConnectorRequest,
-} from '../../../types/ocpp/1.6/Requests';
-import {
-  ChangeAvailabilityResponse,
-  ChangeConfigurationResponse,
-  ClearChargingProfileResponse,
-  DiagnosticsStatusNotificationResponse,
-  GetConfigurationResponse,
-  GetDiagnosticsResponse,
-  OCPP16BootNotificationResponse,
-  OCPP16HeartbeatResponse,
-  OCPP16StatusNotificationResponse,
-  OCPP16TriggerMessageResponse,
-  SetChargingProfileResponse,
-  UnlockConnectorResponse,
-} from '../../../types/ocpp/1.6/Responses';
-import {
-  ChargingProfilePurposeType,
-  OCPP16ChargingProfile,
-} from '../../../types/ocpp/1.6/ChargingProfile';
-import { Client, FTPResponse } from 'basic-ftp';
-import {
-  OCPP16AuthorizationStatus,
-  OCPP16AuthorizeRequest,
-  OCPP16AuthorizeResponse,
-  OCPP16StartTransactionRequest,
-  OCPP16StartTransactionResponse,
-  OCPP16StopTransactionReason,
-  OCPP16StopTransactionRequest,
-  OCPP16StopTransactionResponse,
-} from '../../../types/ocpp/1.6/Transaction';
-import {
-  OCPP16MeterValuesRequest,
-  OCPP16MeterValuesResponse,
-} from '../../../types/ocpp/1.6/MeterValues';
-import {
   OCPP16StandardParametersKey,
+  type OCPP16StartTransactionRequest,
+  type OCPP16StartTransactionResponse,
+  type OCPP16StatusNotificationRequest,
+  type OCPP16StatusNotificationResponse,
+  OCPP16StopTransactionReason,
   OCPP16SupportedFeatureProfiles,
-} from '../../../types/ocpp/1.6/Configuration';
-
-import type ChargingStation from '../../ChargingStation';
-import Constants from '../../../utils/Constants';
-import { DefaultResponse } from '../../../types/ocpp/Responses';
-import { ErrorType } from '../../../types/ocpp/ErrorType';
-import { IncomingRequestHandler } from '../../../types/ocpp/Requests';
-import { JsonType } from '../../../types/JsonType';
-import { OCPP16ChargePointErrorCode } from '../../../types/ocpp/1.6/ChargePointErrorCode';
-import { OCPP16ChargePointStatus } from '../../../types/ocpp/1.6/ChargePointStatus';
-import { OCPP16DiagnosticsStatus } from '../../../types/ocpp/1.6/DiagnosticsStatus';
-import { OCPP16ServiceUtils } from './OCPP16ServiceUtils';
-import { OCPPConfigurationKey } from '../../../types/ocpp/Configuration';
-import OCPPError from '../../../exception/OCPPError';
-import OCPPIncomingRequestService from '../OCPPIncomingRequestService';
-import { URL } from 'url';
-import Utils from '../../../utils/Utils';
-import fs from 'fs';
-import logger from '../../../utils/Logger';
-import path from 'path';
-import tar from 'tar';
+  type OCPP16TriggerMessageRequest,
+  type OCPP16TriggerMessageResponse,
+  type OCPP16UpdateFirmwareRequest,
+  type OCPP16UpdateFirmwareResponse,
+  type OCPPConfigurationKey,
+  OCPPVersion,
+  type RemoteStartTransactionRequest,
+  type RemoteStopTransactionRequest,
+  type ResetRequest,
+  type SetChargingProfileRequest,
+  type SetChargingProfileResponse,
+  type UnlockConnectorRequest,
+  type UnlockConnectorResponse,
+} from '../../../types';
+import { Constants, Utils, logger } from '../../../utils';
+import { OCPP16ServiceUtils, OCPPConstants, OCPPIncomingRequestService } from '../internal';
 
 const moduleName = 'OCPP16IncomingRequestService';
 
-export default class OCPP16IncomingRequestService extends OCPPIncomingRequestService {
+export class OCPP16IncomingRequestService extends OCPPIncomingRequestService {
+  protected jsonSchemas: Map<OCPP16IncomingRequestCommand, JSONSchemaType<JsonObject>>;
   private incomingRequestHandlers: Map<OCPP16IncomingRequestCommand, IncomingRequestHandler>;
 
-  public constructor(chargingStation: ChargingStation) {
-    if (new.target?.name === moduleName) {
-      throw new TypeError(`Cannot construct ${new.target?.name} instances directly`);
-    }
-    super(chargingStation);
+  public constructor() {
+    // if (new.target?.name === moduleName) {
+    //   throw new TypeError(`Cannot construct ${new.target?.name} instances directly`);
+    // }
+    super(OCPPVersion.VERSION_16);
     this.incomingRequestHandlers = new Map<OCPP16IncomingRequestCommand, IncomingRequestHandler>([
       [OCPP16IncomingRequestCommand.RESET, this.handleRequestReset.bind(this)],
       [OCPP16IncomingRequestCommand.CLEAR_CACHE, this.handleRequestClearCache.bind(this)],
@@ -123,162 +125,301 @@ export default class OCPP16IncomingRequestService extends OCPPIncomingRequestSer
       ],
       [OCPP16IncomingRequestCommand.GET_DIAGNOSTICS, this.handleRequestGetDiagnostics.bind(this)],
       [OCPP16IncomingRequestCommand.TRIGGER_MESSAGE, this.handleRequestTriggerMessage.bind(this)],
+      [OCPP16IncomingRequestCommand.DATA_TRANSFER, this.handleRequestDataTransfer.bind(this)],
+      [OCPP16IncomingRequestCommand.UPDATE_FIRMWARE, this.handleRequestUpdateFirmware.bind(this)],
+    ]);
+    this.jsonSchemas = new Map<OCPP16IncomingRequestCommand, JSONSchemaType<JsonObject>>([
+      [
+        OCPP16IncomingRequestCommand.RESET,
+        OCPP16ServiceUtils.parseJsonSchemaFile<ResetRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/Reset.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.CLEAR_CACHE,
+        OCPP16ServiceUtils.parseJsonSchemaFile<OCPP16ClearCacheRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/ClearCache.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.UNLOCK_CONNECTOR,
+        OCPP16ServiceUtils.parseJsonSchemaFile<UnlockConnectorRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/UnlockConnector.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.GET_CONFIGURATION,
+        OCPP16ServiceUtils.parseJsonSchemaFile<GetConfigurationRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/GetConfiguration.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.CHANGE_CONFIGURATION,
+        OCPP16ServiceUtils.parseJsonSchemaFile<ChangeConfigurationRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/ChangeConfiguration.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.GET_DIAGNOSTICS,
+        OCPP16ServiceUtils.parseJsonSchemaFile<GetDiagnosticsRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/GetDiagnostics.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.SET_CHARGING_PROFILE,
+        OCPP16ServiceUtils.parseJsonSchemaFile<SetChargingProfileRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/SetChargingProfile.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.CLEAR_CHARGING_PROFILE,
+        OCPP16ServiceUtils.parseJsonSchemaFile<ClearChargingProfileRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/ClearChargingProfile.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.CHANGE_AVAILABILITY,
+        OCPP16ServiceUtils.parseJsonSchemaFile<ChangeAvailabilityRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/ChangeAvailability.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.REMOTE_START_TRANSACTION,
+        OCPP16ServiceUtils.parseJsonSchemaFile<RemoteStartTransactionRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/RemoteStartTransaction.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.REMOTE_STOP_TRANSACTION,
+        OCPP16ServiceUtils.parseJsonSchemaFile<RemoteStopTransactionRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/RemoteStopTransaction.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.TRIGGER_MESSAGE,
+        OCPP16ServiceUtils.parseJsonSchemaFile<OCPP16TriggerMessageRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/TriggerMessage.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.DATA_TRANSFER,
+        OCPP16ServiceUtils.parseJsonSchemaFile<OCPP16DataTransferRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/DataTransfer.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
+      [
+        OCPP16IncomingRequestCommand.UPDATE_FIRMWARE,
+        OCPP16ServiceUtils.parseJsonSchemaFile<OCPP16UpdateFirmwareRequest>(
+          '../../../assets/json-schemas/ocpp/1.6/UpdateFirmware.json',
+          moduleName,
+          'constructor'
+        ),
+      ],
     ]);
+    this.validatePayload.bind(this);
   }
 
   public async incomingRequestHandler(
+    chargingStation: ChargingStation,
     messageId: string,
     commandName: OCPP16IncomingRequestCommand,
     commandPayload: JsonType
   ): Promise<void> {
-    let result: JsonType;
+    let response: JsonType;
     if (
-      this.chargingStation.getOcppStrictCompliance() &&
-      this.chargingStation.isInPendingState() &&
+      chargingStation.getOcppStrictCompliance() === true &&
+      chargingStation.isInPendingState() === true &&
       (commandName === OCPP16IncomingRequestCommand.REMOTE_START_TRANSACTION ||
         commandName === OCPP16IncomingRequestCommand.REMOTE_STOP_TRANSACTION)
     ) {
       throw new OCPPError(
         ErrorType.SECURITY_ERROR,
-        `${commandName} cannot be issued to handle request payload ${JSON.stringify(
+        `${commandName} cannot be issued to handle request PDU ${JSON.stringify(
           commandPayload,
           null,
           2
         )} while the charging station is in pending state on the central server`,
-        commandName
+        commandName,
+        commandPayload
       );
     }
     if (
-      this.chargingStation.isRegistered() ||
-      (!this.chargingStation.getOcppStrictCompliance() && this.chargingStation.isInUnknownState())
+      chargingStation.isRegistered() === true ||
+      (chargingStation.getOcppStrictCompliance() === false &&
+        chargingStation.isInUnknownState() === true)
     ) {
-      if (this.incomingRequestHandlers.has(commandName)) {
+      if (
+        this.incomingRequestHandlers.has(commandName) === true &&
+        OCPP16ServiceUtils.isIncomingRequestCommandSupported(chargingStation, commandName) === true
+      ) {
         try {
-          // Call the method to build the result
-          result = await this.incomingRequestHandlers.get(commandName)(commandPayload);
+          this.validatePayload(chargingStation, commandName, commandPayload);
+          // Call the method to build the response
+          response = await this.incomingRequestHandlers.get(commandName)(
+            chargingStation,
+            commandPayload
+          );
         } catch (error) {
           // Log
-          logger.error(this.chargingStation.logPrefix() + ' Handle request error: %j', error);
+          logger.error(
+            `${chargingStation.logPrefix()} ${moduleName}.incomingRequestHandler: Handle incoming request error:`,
+            error
+          );
           throw error;
         }
       } else {
         // Throw exception
         throw new OCPPError(
           ErrorType.NOT_IMPLEMENTED,
-          `${commandName} is not implemented to handle request payload ${JSON.stringify(
+          `${commandName} is not implemented to handle request PDU ${JSON.stringify(
             commandPayload,
             null,
             2
           )}`,
-          commandName
+          commandName,
+          commandPayload
         );
       }
     } else {
       throw new OCPPError(
         ErrorType.SECURITY_ERROR,
-        `${commandName} cannot be issued to handle request payload ${JSON.stringify(
+        `${commandName} cannot be issued to handle request PDU ${JSON.stringify(
           commandPayload,
           null,
           2
         )} while the charging station is not registered on the central server.`,
-        commandName
+        commandName,
+        commandPayload
       );
     }
-    // Send the built result
-    await this.chargingStation.ocppRequestService.sendResult(messageId, result, commandName);
+    // Send the built response
+    await chargingStation.ocppRequestService.sendResponse(
+      chargingStation,
+      messageId,
+      response,
+      commandName
+    );
   }
 
-  // Simulate charging station restart
-  private handleRequestReset(commandPayload: ResetRequest): DefaultResponse {
-    // eslint-disable-next-line @typescript-eslint/no-misused-promises
-    setImmediate(async (): Promise<void> => {
-      await this.chargingStation.reset(
-        (commandPayload.type + 'Reset') as OCPP16StopTransactionReason
+  private validatePayload(
+    chargingStation: ChargingStation,
+    commandName: OCPP16IncomingRequestCommand,
+    commandPayload: JsonType
+  ): boolean {
+    if (this.jsonSchemas.has(commandName) === true) {
+      return this.validateIncomingRequestPayload(
+        chargingStation,
+        commandName,
+        this.jsonSchemas.get(commandName),
+        commandPayload
       );
-    });
+    }
+    logger.warn(
+      `${chargingStation.logPrefix()} ${moduleName}.validatePayload: No JSON schema found for command '${commandName}' PDU validation`
+    );
+    return false;
+  }
+
+  // Simulate charging station restart
+  private handleRequestReset(
+    chargingStation: ChargingStation,
+    commandPayload: ResetRequest
+  ): GenericResponse {
+    this.runInAsyncScope(
+      chargingStation.reset.bind(chargingStation) as (
+        this: ChargingStation,
+        ...args: any[]
+      ) => Promise<void>,
+      chargingStation,
+      `${commandPayload.type}Reset` as OCPP16StopTransactionReason
+    ).catch(Constants.EMPTY_FUNCTION);
     logger.info(
-      `${this.chargingStation.logPrefix()} ${
+      `${chargingStation.logPrefix()} ${
         commandPayload.type
       } reset command received, simulating it. The station will be back online in ${Utils.formatDurationMilliSeconds(
-        this.chargingStation.stationInfo.resetTime
+        chargingStation.stationInfo.resetTime
       )}`
     );
-    return Constants.OCPP_RESPONSE_ACCEPTED;
-  }
-
-  private handleRequestClearCache(): DefaultResponse {
-    return Constants.OCPP_RESPONSE_ACCEPTED;
+    return OCPPConstants.OCPP_RESPONSE_ACCEPTED;
   }
 
   private async handleRequestUnlockConnector(
+    chargingStation: ChargingStation,
     commandPayload: UnlockConnectorRequest
   ): Promise<UnlockConnectorResponse> {
     const connectorId = commandPayload.connectorId;
+    if (chargingStation.connectors.has(connectorId) === false) {
+      logger.error(
+        `${chargingStation.logPrefix()} Trying to unlock a non existing connector Id ${connectorId.toString()}`
+      );
+      return OCPPConstants.OCPP_RESPONSE_UNLOCK_NOT_SUPPORTED;
+    }
     if (connectorId === 0) {
       logger.error(
-        this.chargingStation.logPrefix() + ' Trying to unlock connector ' + connectorId.toString()
+        `${chargingStation.logPrefix()} Trying to unlock connector Id ${connectorId.toString()}`
       );
-      return Constants.OCPP_RESPONSE_UNLOCK_NOT_SUPPORTED;
+      return OCPPConstants.OCPP_RESPONSE_UNLOCK_NOT_SUPPORTED;
     }
-    if (this.chargingStation.getConnectorStatus(connectorId)?.transactionStarted) {
-      const transactionId = this.chargingStation.getConnectorStatus(connectorId).transactionId;
-      if (
-        this.chargingStation.getBeginEndMeterValues() &&
-        this.chargingStation.getOcppStrictCompliance() &&
-        !this.chargingStation.getOutOfOrderEndMeterValues()
-      ) {
-        // FIXME: Implement OCPP version agnostic helpers
-        const transactionEndMeterValue = OCPP16ServiceUtils.buildTransactionEndMeterValue(
-          this.chargingStation,
-          connectorId,
-          this.chargingStation.getEnergyActiveImportRegisterByTransactionId(transactionId)
-        );
-        await this.chargingStation.ocppRequestService.requestHandler<
-          OCPP16MeterValuesRequest,
-          OCPP16MeterValuesResponse
-        >(OCPP16RequestCommand.METER_VALUES, {
-          connectorId,
-          transactionId,
-          meterValue: transactionEndMeterValue,
-        });
-      }
-      const stopResponse = await this.chargingStation.ocppRequestService.requestHandler<
-        OCPP16StopTransactionRequest,
-        OCPP16StopTransactionResponse
-      >(OCPP16RequestCommand.STOP_TRANSACTION, {
-        transactionId,
-        meterStop: this.chargingStation.getEnergyActiveImportRegisterByTransactionId(transactionId),
-        idTag: this.chargingStation.getTransactionIdTag(transactionId),
-        reason: OCPP16StopTransactionReason.UNLOCK_COMMAND,
-      });
+    if (chargingStation.getConnectorStatus(connectorId)?.transactionStarted === true) {
+      const stopResponse = await chargingStation.stopTransactionOnConnector(
+        connectorId,
+        OCPP16StopTransactionReason.UNLOCK_COMMAND
+      );
       if (stopResponse.idTagInfo?.status === OCPP16AuthorizationStatus.ACCEPTED) {
-        return Constants.OCPP_RESPONSE_UNLOCKED;
+        return OCPPConstants.OCPP_RESPONSE_UNLOCKED;
       }
-      return Constants.OCPP_RESPONSE_UNLOCK_FAILED;
+      return OCPPConstants.OCPP_RESPONSE_UNLOCK_FAILED;
     }
-    await this.chargingStation.ocppRequestService.requestHandler<
+    await chargingStation.ocppRequestService.requestHandler<
       OCPP16StatusNotificationRequest,
       OCPP16StatusNotificationResponse
-    >(OCPP16RequestCommand.STATUS_NOTIFICATION, {
+    >(chargingStation, OCPP16RequestCommand.STATUS_NOTIFICATION, {
       connectorId,
-      status: OCPP16ChargePointStatus.AVAILABLE,
+      status: OCPP16ChargePointStatus.Available,
       errorCode: OCPP16ChargePointErrorCode.NO_ERROR,
     });
-    this.chargingStation.getConnectorStatus(connectorId).status = OCPP16ChargePointStatus.AVAILABLE;
-    return Constants.OCPP_RESPONSE_UNLOCKED;
+    chargingStation.getConnectorStatus(connectorId).status = OCPP16ChargePointStatus.Available;
+    return OCPPConstants.OCPP_RESPONSE_UNLOCKED;
   }
 
   private handleRequestGetConfiguration(
+    chargingStation: ChargingStation,
     commandPayload: GetConfigurationRequest
   ): GetConfigurationResponse {
     const configurationKey: OCPPConfigurationKey[] = [];
     const unknownKey: string[] = [];
-    if (Utils.isEmptyArray(commandPayload.key)) {
-      for (const configuration of this.chargingStation.ocppConfiguration.configurationKey) {
-        if (Utils.isUndefined(configuration.visible)) {
+    if (Utils.isUndefined(commandPayload.key) === true) {
+      for (const configuration of chargingStation.ocppConfiguration.configurationKey) {
+        if (Utils.isUndefined(configuration.visible) === true) {
           configuration.visible = true;
         }
-        if (!configuration.visible) {
+        if (configuration.visible === false) {
           continue;
         }
         configurationKey.push({
@@ -287,14 +428,18 @@ export default class OCPP16IncomingRequestService extends OCPPIncomingRequestSer
           value: configuration.value,
         });
       }
-    } else {
+    } else if (Utils.isNotEmptyArray(commandPayload.key) === true) {
       for (const key of commandPayload.key) {
-        const keyFound = this.chargingStation.getConfigurationKey(key);
+        const keyFound = ChargingStationConfigurationUtils.getConfigurationKey(
+          chargingStation,
+          key,
+          true
+        );
         if (keyFound) {
-          if (Utils.isUndefined(keyFound.visible)) {
+          if (Utils.isUndefined(keyFound.visible) === true) {
             keyFound.visible = true;
           }
-          if (!keyFound.visible) {
+          if (keyFound.visible === false) {
             continue;
           }
           configurationKey.push({
@@ -314,34 +459,23 @@ export default class OCPP16IncomingRequestService extends OCPPIncomingRequestSer
   }
 
   private handleRequestChangeConfiguration(
+    chargingStation: ChargingStation,
     commandPayload: ChangeConfigurationRequest
   ): ChangeConfigurationResponse {
-    // JSON request fields type sanity check
-    if (!Utils.isString(commandPayload.key)) {
-      logger.error(
-        `${this.chargingStation.logPrefix()} ${
-          OCPP16IncomingRequestCommand.CHANGE_CONFIGURATION
-        } request key field is not a string:`,
-        commandPayload
-      );
-    }
-    if (!Utils.isString(commandPayload.value)) {
-      logger.error(
-        `${this.chargingStation.logPrefix()} ${
-          OCPP16IncomingRequestCommand.CHANGE_CONFIGURATION
-        } request value field is not a string:`,
-        commandPayload
-      );
-    }
-    const keyToChange = this.chargingStation.getConfigurationKey(commandPayload.key, true);
+    const keyToChange = ChargingStationConfigurationUtils.getConfigurationKey(
+      chargingStation,
+      commandPayload.key,
+      true
+    );
     if (!keyToChange) {
-      return Constants.OCPP_CONFIGURATION_RESPONSE_NOT_SUPPORTED;
+      return OCPPConstants.OCPP_CONFIGURATION_RESPONSE_NOT_SUPPORTED;
     } else if (keyToChange && keyToChange.readonly) {
-      return Constants.OCPP_CONFIGURATION_RESPONSE_REJECTED;
+      return OCPPConstants.OCPP_CONFIGURATION_RESPONSE_REJECTED;
     } else if (keyToChange && !keyToChange.readonly) {
       let valueChanged = false;
       if (keyToChange.value !== commandPayload.value) {
-        this.chargingStation.setConfigurationKeyValue(
+        ChargingStationConfigurationUtils.setConfigurationKeyValue(
+          chargingStation,
           commandPayload.key,
           commandPayload.value,
           true
@@ -350,120 +484,133 @@ export default class OCPP16IncomingRequestService extends OCPPIncomingRequestSer
       }
       let triggerHeartbeatRestart = false;
       if (keyToChange.key === OCPP16StandardParametersKey.HeartBeatInterval && valueChanged) {
-        this.chargingStation.setConfigurationKeyValue(
+        ChargingStationConfigurationUtils.setConfigurationKeyValue(
+          chargingStation,
           OCPP16StandardParametersKey.HeartbeatInterval,
           commandPayload.value
         );
         triggerHeartbeatRestart = true;
       }
       if (keyToChange.key === OCPP16StandardParametersKey.HeartbeatInterval && valueChanged) {
-        this.chargingStation.setConfigurationKeyValue(
+        ChargingStationConfigurationUtils.setConfigurationKeyValue(
+          chargingStation,
           OCPP16StandardParametersKey.HeartBeatInterval,
           commandPayload.value
         );
         triggerHeartbeatRestart = true;
       }
       if (triggerHeartbeatRestart) {
-        this.chargingStation.restartHeartbeat();
+        chargingStation.restartHeartbeat();
       }
       if (keyToChange.key === OCPP16StandardParametersKey.WebSocketPingInterval && valueChanged) {
-        this.chargingStation.restartWebSocketPing();
+        chargingStation.restartWebSocketPing();
       }
       if (keyToChange.reboot) {
-        return Constants.OCPP_CONFIGURATION_RESPONSE_REBOOT_REQUIRED;
+        return OCPPConstants.OCPP_CONFIGURATION_RESPONSE_REBOOT_REQUIRED;
       }
-      return Constants.OCPP_CONFIGURATION_RESPONSE_ACCEPTED;
+      return OCPPConstants.OCPP_CONFIGURATION_RESPONSE_ACCEPTED;
     }
   }
 
   private handleRequestSetChargingProfile(
+    chargingStation: ChargingStation,
     commandPayload: SetChargingProfileRequest
   ): SetChargingProfileResponse {
     if (
-      !OCPP16ServiceUtils.checkFeatureProfile(
-        this.chargingStation,
+      OCPP16ServiceUtils.checkFeatureProfile(
+        chargingStation,
         OCPP16SupportedFeatureProfiles.SmartCharging,
         OCPP16IncomingRequestCommand.SET_CHARGING_PROFILE
-      )
+      ) === false
     ) {
-      return Constants.OCPP_SET_CHARGING_PROFILE_RESPONSE_NOT_SUPPORTED;
+      return OCPPConstants.OCPP_SET_CHARGING_PROFILE_RESPONSE_NOT_SUPPORTED;
     }
-    if (!this.chargingStation.getConnectorStatus(commandPayload.connectorId)) {
+    if (chargingStation.connectors.has(commandPayload.connectorId) === false) {
       logger.error(
-        `${this.chargingStation.logPrefix()} Trying to set charging profile(s) to a non existing connector Id ${
+        `${chargingStation.logPrefix()} Trying to set charging profile(s) to a non existing connector Id ${
           commandPayload.connectorId
         }`
       );
-      return Constants.OCPP_SET_CHARGING_PROFILE_RESPONSE_REJECTED;
+      return OCPPConstants.OCPP_SET_CHARGING_PROFILE_RESPONSE_REJECTED;
     }
     if (
       commandPayload.csChargingProfiles.chargingProfilePurpose ===
-        ChargingProfilePurposeType.CHARGE_POINT_MAX_PROFILE &&
+        OCPP16ChargingProfilePurposeType.CHARGE_POINT_MAX_PROFILE &&
       commandPayload.connectorId !== 0
     ) {
-      return Constants.OCPP_SET_CHARGING_PROFILE_RESPONSE_REJECTED;
+      return OCPPConstants.OCPP_SET_CHARGING_PROFILE_RESPONSE_REJECTED;
     }
     if (
       commandPayload.csChargingProfiles.chargingProfilePurpose ===
-        ChargingProfilePurposeType.TX_PROFILE &&
+        OCPP16ChargingProfilePurposeType.TX_PROFILE &&
       (commandPayload.connectorId === 0 ||
-        !this.chargingStation.getConnectorStatus(commandPayload.connectorId)?.transactionStarted)
+        chargingStation.getConnectorStatus(commandPayload.connectorId)?.transactionStarted ===
+          false)
     ) {
-      return Constants.OCPP_SET_CHARGING_PROFILE_RESPONSE_REJECTED;
+      logger.error(
+        `${chargingStation.logPrefix()} Trying to set transaction charging profile(s) on connector ${
+          commandPayload.connectorId
+        } without a started transaction`
+      );
+      return OCPPConstants.OCPP_SET_CHARGING_PROFILE_RESPONSE_REJECTED;
     }
-    this.chargingStation.setChargingProfile(
+    OCPP16ServiceUtils.setChargingProfile(
+      chargingStation,
       commandPayload.connectorId,
       commandPayload.csChargingProfiles
     );
     logger.debug(
-      `${this.chargingStation.logPrefix()} Charging profile(s) set on connector id ${
+      `${chargingStation.logPrefix()} Charging profile(s) set on connector id ${
         commandPayload.connectorId
-      }, dump their stack: %j`,
-      this.chargingStation.getConnectorStatus(commandPayload.connectorId).chargingProfiles
+      }: %j`,
+      commandPayload.csChargingProfiles
     );
-    return Constants.OCPP_SET_CHARGING_PROFILE_RESPONSE_ACCEPTED;
+    return OCPPConstants.OCPP_SET_CHARGING_PROFILE_RESPONSE_ACCEPTED;
   }
 
   private handleRequestClearChargingProfile(
+    chargingStation: ChargingStation,
     commandPayload: ClearChargingProfileRequest
   ): ClearChargingProfileResponse {
     if (
-      !OCPP16ServiceUtils.checkFeatureProfile(
-        this.chargingStation,
+      OCPP16ServiceUtils.checkFeatureProfile(
+        chargingStation,
         OCPP16SupportedFeatureProfiles.SmartCharging,
         OCPP16IncomingRequestCommand.CLEAR_CHARGING_PROFILE
-      )
+      ) === false
     ) {
-      return Constants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_UNKNOWN;
+      return OCPPConstants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_UNKNOWN;
     }
-    const connectorStatus = this.chargingStation.getConnectorStatus(commandPayload.connectorId);
-    if (!connectorStatus) {
+    if (chargingStation.connectors.has(commandPayload.connectorId) === false) {
       logger.error(
-        `${this.chargingStation.logPrefix()} Trying to clear a charging profile(s) to a non existing connector Id ${
+        `${chargingStation.logPrefix()} Trying to clear a charging profile(s) to a non existing connector Id ${
           commandPayload.connectorId
         }`
       );
-      return Constants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_UNKNOWN;
+      return OCPPConstants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_UNKNOWN;
     }
-    if (commandPayload.connectorId && !Utils.isEmptyArray(connectorStatus.chargingProfiles)) {
+    const connectorStatus = chargingStation.getConnectorStatus(commandPayload.connectorId);
+    if (
+      !Utils.isNullOrUndefined(commandPayload.connectorId) &&
+      Utils.isNotEmptyArray(connectorStatus?.chargingProfiles)
+    ) {
       connectorStatus.chargingProfiles = [];
       logger.debug(
-        `${this.chargingStation.logPrefix()} Charging profile(s) cleared on connector id ${
+        `${chargingStation.logPrefix()} Charging profile(s) cleared on connector id ${
           commandPayload.connectorId
-        }, dump their stack: %j`,
-        connectorStatus.chargingProfiles
+        }`
       );
-      return Constants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_ACCEPTED;
+      return OCPPConstants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_ACCEPTED;
     }
-    if (!commandPayload.connectorId) {
+    if (Utils.isNullOrUndefined(commandPayload.connectorId)) {
       let clearedCP = false;
-      for (const connectorId of this.chargingStation.connectors.keys()) {
+      for (const connectorId of chargingStation.connectors.keys()) {
         if (
-          !Utils.isEmptyArray(this.chargingStation.getConnectorStatus(connectorId).chargingProfiles)
+          Utils.isNotEmptyArray(chargingStation.getConnectorStatus(connectorId)?.chargingProfiles)
         ) {
-          this.chargingStation
+          chargingStation
             .getConnectorStatus(connectorId)
-            .chargingProfiles?.forEach((chargingProfile: OCPP16ChargingProfile, index: number) => {
+            ?.chargingProfiles?.forEach((chargingProfile: OCPP16ChargingProfile, index: number) => {
               let clearCurrentCP = false;
               if (chargingProfile.chargingProfileId === commandPayload.id) {
                 clearCurrentCP = true;
@@ -487,12 +634,10 @@ export default class OCPP16IncomingRequestService extends OCPPIncomingRequestSer
                 clearCurrentCP = true;
               }
               if (clearCurrentCP) {
-                connectorStatus.chargingProfiles[index] = {} as OCPP16ChargingProfile;
+                connectorStatus?.chargingProfiles?.splice(index, 1);
                 logger.debug(
-                  `${this.chargingStation.logPrefix()} Matching charging profile(s) cleared on connector id ${
-                    commandPayload.connectorId
-                  }, dump their stack: %j`,
-                  connectorStatus.chargingProfiles
+                  `${chargingStation.logPrefix()} Matching charging profile(s) cleared: %j`,
+                  chargingProfile
                 );
                 clearedCP = true;
               }
@@ -500,107 +645,116 @@ export default class OCPP16IncomingRequestService extends OCPPIncomingRequestSer
         }
       }
       if (clearedCP) {
-        return Constants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_ACCEPTED;
+        return OCPPConstants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_ACCEPTED;
       }
     }
-    return Constants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_UNKNOWN;
+    return OCPPConstants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_UNKNOWN;
   }
 
   private async handleRequestChangeAvailability(
+    chargingStation: ChargingStation,
     commandPayload: ChangeAvailabilityRequest
   ): Promise<ChangeAvailabilityResponse> {
     const connectorId: number = commandPayload.connectorId;
-    if (!this.chargingStation.getConnectorStatus(connectorId)) {
+    if (chargingStation.connectors.has(connectorId) === false) {
       logger.error(
-        `${this.chargingStation.logPrefix()} Trying to change the availability of a non existing connector Id ${connectorId.toString()}`
+        `${chargingStation.logPrefix()} Trying to change the availability of a non existing connector Id ${connectorId.toString()}`
       );
-      return Constants.OCPP_AVAILABILITY_RESPONSE_REJECTED;
+      return OCPPConstants.OCPP_AVAILABILITY_RESPONSE_REJECTED;
     }
     const chargePointStatus: OCPP16ChargePointStatus =
       commandPayload.type === OCPP16AvailabilityType.OPERATIVE
-        ? OCPP16ChargePointStatus.AVAILABLE
-        : OCPP16ChargePointStatus.UNAVAILABLE;
+        ? OCPP16ChargePointStatus.Available
+        : OCPP16ChargePointStatus.Unavailable;
     if (connectorId === 0) {
-      let response: ChangeAvailabilityResponse = Constants.OCPP_AVAILABILITY_RESPONSE_ACCEPTED;
-      for (const id of this.chargingStation.connectors.keys()) {
-        if (this.chargingStation.getConnectorStatus(id)?.transactionStarted) {
-          response = Constants.OCPP_AVAILABILITY_RESPONSE_SCHEDULED;
+      let response: ChangeAvailabilityResponse = OCPPConstants.OCPP_AVAILABILITY_RESPONSE_ACCEPTED;
+      for (const id of chargingStation.connectors.keys()) {
+        if (chargingStation.getConnectorStatus(id)?.transactionStarted === true) {
+          response = OCPPConstants.OCPP_AVAILABILITY_RESPONSE_SCHEDULED;
         }
-        this.chargingStation.getConnectorStatus(id).availability = commandPayload.type;
-        if (response === Constants.OCPP_AVAILABILITY_RESPONSE_ACCEPTED) {
-          await this.chargingStation.ocppRequestService.requestHandler<
+        chargingStation.getConnectorStatus(id).availability = commandPayload.type;
+        if (response === OCPPConstants.OCPP_AVAILABILITY_RESPONSE_ACCEPTED) {
+          await chargingStation.ocppRequestService.requestHandler<
             OCPP16StatusNotificationRequest,
             OCPP16StatusNotificationResponse
-          >(OCPP16RequestCommand.STATUS_NOTIFICATION, {
+          >(chargingStation, OCPP16RequestCommand.STATUS_NOTIFICATION, {
             connectorId: id,
             status: chargePointStatus,
             errorCode: OCPP16ChargePointErrorCode.NO_ERROR,
           });
-          this.chargingStation.getConnectorStatus(id).status = chargePointStatus;
+          chargingStation.getConnectorStatus(id).status = chargePointStatus;
         }
       }
       return response;
     } else if (
       connectorId > 0 &&
-      (this.chargingStation.getConnectorStatus(0).availability ===
-        OCPP16AvailabilityType.OPERATIVE ||
-        (this.chargingStation.getConnectorStatus(0).availability ===
-          OCPP16AvailabilityType.INOPERATIVE &&
+      (chargingStation.isChargingStationAvailable() === true ||
+        (chargingStation.isChargingStationAvailable() === false &&
           commandPayload.type === OCPP16AvailabilityType.INOPERATIVE))
     ) {
-      if (this.chargingStation.getConnectorStatus(connectorId)?.transactionStarted) {
-        this.chargingStation.getConnectorStatus(connectorId).availability = commandPayload.type;
-        return Constants.OCPP_AVAILABILITY_RESPONSE_SCHEDULED;
+      if (chargingStation.getConnectorStatus(connectorId)?.transactionStarted === true) {
+        chargingStation.getConnectorStatus(connectorId).availability = commandPayload.type;
+        return OCPPConstants.OCPP_AVAILABILITY_RESPONSE_SCHEDULED;
       }
-      this.chargingStation.getConnectorStatus(connectorId).availability = commandPayload.type;
-      await this.chargingStation.ocppRequestService.requestHandler<
+      chargingStation.getConnectorStatus(connectorId).availability = commandPayload.type;
+      await chargingStation.ocppRequestService.requestHandler<
         OCPP16StatusNotificationRequest,
         OCPP16StatusNotificationResponse
-      >(OCPP16RequestCommand.STATUS_NOTIFICATION, {
+      >(chargingStation, OCPP16RequestCommand.STATUS_NOTIFICATION, {
         connectorId,
         status: chargePointStatus,
         errorCode: OCPP16ChargePointErrorCode.NO_ERROR,
       });
-      this.chargingStation.getConnectorStatus(connectorId).status = chargePointStatus;
-      return Constants.OCPP_AVAILABILITY_RESPONSE_ACCEPTED;
+      chargingStation.getConnectorStatus(connectorId).status = chargePointStatus;
+      return OCPPConstants.OCPP_AVAILABILITY_RESPONSE_ACCEPTED;
     }
-    return Constants.OCPP_AVAILABILITY_RESPONSE_REJECTED;
+    return OCPPConstants.OCPP_AVAILABILITY_RESPONSE_REJECTED;
   }
 
   private async handleRequestRemoteStartTransaction(
+    chargingStation: ChargingStation,
     commandPayload: RemoteStartTransactionRequest
-  ): Promise<DefaultResponse> {
+  ): Promise<GenericResponse> {
     const transactionConnectorId = commandPayload.connectorId;
-    const connectorStatus = this.chargingStation.getConnectorStatus(transactionConnectorId);
-    if (transactionConnectorId) {
-      await this.chargingStation.ocppRequestService.requestHandler<
+    if (chargingStation.connectors.has(transactionConnectorId) === true) {
+      const remoteStartTransactionLogMsg = `${chargingStation.logPrefix()} Transaction remotely STARTED on ${
+        chargingStation.stationInfo.chargingStationId
+      }#${transactionConnectorId.toString()} for idTag '${commandPayload.idTag}'`;
+      await chargingStation.ocppRequestService.requestHandler<
         OCPP16StatusNotificationRequest,
         OCPP16StatusNotificationResponse
-      >(OCPP16RequestCommand.STATUS_NOTIFICATION, {
+      >(chargingStation, OCPP16RequestCommand.STATUS_NOTIFICATION, {
         connectorId: transactionConnectorId,
-        status: OCPP16ChargePointStatus.PREPARING,
+        status: OCPP16ChargePointStatus.Preparing,
         errorCode: OCPP16ChargePointErrorCode.NO_ERROR,
       });
-      connectorStatus.status = OCPP16ChargePointStatus.PREPARING;
-      if (this.chargingStation.isChargingStationAvailable() && connectorStatus) {
+      const connectorStatus = chargingStation.getConnectorStatus(transactionConnectorId);
+      connectorStatus.status = OCPP16ChargePointStatus.Preparing;
+      if (chargingStation.isChargingStationAvailable() === true) {
         // Check if authorized
-        if (this.chargingStation.getAuthorizeRemoteTxRequests()) {
+        if (chargingStation.getAuthorizeRemoteTxRequests() === true) {
           let authorized = false;
           if (
-            this.chargingStation.getLocalAuthListEnabled() &&
-            this.chargingStation.hasAuthorizedTags() &&
-            this.chargingStation.authorizedTags.find((value) => value === commandPayload.idTag)
+            chargingStation.getLocalAuthListEnabled() === true &&
+            chargingStation.hasAuthorizedTags() === true &&
+            Utils.isNotEmptyString(
+              chargingStation.authorizedTagsCache
+                .getAuthorizedTags(
+                  ChargingStationUtils.getAuthorizationFile(chargingStation.stationInfo)
+                )
+                ?.find((idTag) => idTag === commandPayload.idTag)
+            )
           ) {
             connectorStatus.localAuthorizeIdTag = commandPayload.idTag;
             connectorStatus.idTagLocalAuthorized = true;
             authorized = true;
-          } else if (this.chargingStation.getMayAuthorizeAtRemoteStart()) {
+          } else if (chargingStation.getMustAuthorizeAtRemoteStart() === true) {
             connectorStatus.authorizeIdTag = commandPayload.idTag;
             const authorizeResponse: OCPP16AuthorizeResponse =
-              await this.chargingStation.ocppRequestService.requestHandler<
+              await chargingStation.ocppRequestService.requestHandler<
                 OCPP16AuthorizeRequest,
                 OCPP16AuthorizeResponse
-              >(OCPP16RequestCommand.AUTHORIZE, {
+              >(chargingStation, OCPP16RequestCommand.AUTHORIZE, {
                 idTag: commandPayload.idTag,
               });
             if (authorizeResponse?.idTagInfo?.status === OCPP16AuthorizationStatus.ACCEPTED) {
@@ -608,51 +762,47 @@ export default class OCPP16IncomingRequestService extends OCPPIncomingRequestSer
             }
           } else {
             logger.warn(
-              `${this.chargingStation.logPrefix()} The charging station configuration expects authorize at remote start transaction but local authorization or authorize isn't enabled`
+              `${chargingStation.logPrefix()} The charging station configuration expects authorize at remote start transaction but local authorization or authorize isn't enabled`
             );
           }
-          if (authorized) {
+          if (authorized === true) {
             // Authorization successful, start transaction
             if (
               this.setRemoteStartTransactionChargingProfile(
+                chargingStation,
                 transactionConnectorId,
                 commandPayload.chargingProfile
-              )
+              ) === true
             ) {
               connectorStatus.transactionRemoteStarted = true;
               if (
                 (
-                  await this.chargingStation.ocppRequestService.requestHandler<
+                  await chargingStation.ocppRequestService.requestHandler<
                     OCPP16StartTransactionRequest,
                     OCPP16StartTransactionResponse
-                  >(OCPP16RequestCommand.START_TRANSACTION, {
+                  >(chargingStation, OCPP16RequestCommand.START_TRANSACTION, {
                     connectorId: transactionConnectorId,
                     idTag: commandPayload.idTag,
                   })
                 ).idTagInfo.status === OCPP16AuthorizationStatus.ACCEPTED
               ) {
-                logger.debug(
-                  this.chargingStation.logPrefix() +
-                    ' Transaction remotely STARTED on ' +
-                    this.chargingStation.stationInfo.chargingStationId +
-                    '#' +
-                    transactionConnectorId.toString() +
-                    ' for idTag ' +
-                    commandPayload.idTag
-                );
-                return Constants.OCPP_RESPONSE_ACCEPTED;
+                logger.debug(remoteStartTransactionLogMsg);
+                return OCPPConstants.OCPP_RESPONSE_ACCEPTED;
               }
               return this.notifyRemoteStartTransactionRejected(
+                chargingStation,
                 transactionConnectorId,
                 commandPayload.idTag
               );
             }
             return this.notifyRemoteStartTransactionRejected(
+              chargingStation,
               transactionConnectorId,
               commandPayload.idTag
             );
           }
           return this.notifyRemoteStartTransactionRejected(
+            chargingStation,
             transactionConnectorId,
             commandPayload.idTag
           );
@@ -660,98 +810,92 @@ export default class OCPP16IncomingRequestService extends OCPPIncomingRequestSer
         // No authorization check required, start transaction
         if (
           this.setRemoteStartTransactionChargingProfile(
+            chargingStation,
             transactionConnectorId,
             commandPayload.chargingProfile
-          )
+          ) === true
         ) {
           connectorStatus.transactionRemoteStarted = true;
           if (
             (
-              await this.chargingStation.ocppRequestService.requestHandler<
+              await chargingStation.ocppRequestService.requestHandler<
                 OCPP16StartTransactionRequest,
                 OCPP16StartTransactionResponse
-              >(OCPP16RequestCommand.START_TRANSACTION, {
+              >(chargingStation, OCPP16RequestCommand.START_TRANSACTION, {
                 connectorId: transactionConnectorId,
                 idTag: commandPayload.idTag,
               })
             ).idTagInfo.status === OCPP16AuthorizationStatus.ACCEPTED
           ) {
-            logger.debug(
-              this.chargingStation.logPrefix() +
-                ' Transaction remotely STARTED on ' +
-                this.chargingStation.stationInfo.chargingStationId +
-                '#' +
-                transactionConnectorId.toString() +
-                ' for idTag ' +
-                commandPayload.idTag
-            );
-            return Constants.OCPP_RESPONSE_ACCEPTED;
+            logger.debug(remoteStartTransactionLogMsg);
+            return OCPPConstants.OCPP_RESPONSE_ACCEPTED;
           }
           return this.notifyRemoteStartTransactionRejected(
+            chargingStation,
             transactionConnectorId,
             commandPayload.idTag
           );
         }
         return this.notifyRemoteStartTransactionRejected(
+          chargingStation,
           transactionConnectorId,
           commandPayload.idTag
         );
       }
       return this.notifyRemoteStartTransactionRejected(
+        chargingStation,
         transactionConnectorId,
         commandPayload.idTag
       );
     }
-    return this.notifyRemoteStartTransactionRejected(transactionConnectorId, commandPayload.idTag);
+    return this.notifyRemoteStartTransactionRejected(
+      chargingStation,
+      transactionConnectorId,
+      commandPayload.idTag
+    );
   }
 
   private async notifyRemoteStartTransactionRejected(
+    chargingStation: ChargingStation,
     connectorId: number,
     idTag: string
-  ): Promise<DefaultResponse> {
+  ): Promise<GenericResponse> {
     if (
-      this.chargingStation.getConnectorStatus(connectorId).status !==
-      OCPP16ChargePointStatus.AVAILABLE
+      chargingStation.getConnectorStatus(connectorId)?.status !== OCPP16ChargePointStatus.Available
     ) {
-      await this.chargingStation.ocppRequestService.requestHandler<
+      await chargingStation.ocppRequestService.requestHandler<
         OCPP16StatusNotificationRequest,
         OCPP16StatusNotificationResponse
-      >(OCPP16RequestCommand.STATUS_NOTIFICATION, {
+      >(chargingStation, OCPP16RequestCommand.STATUS_NOTIFICATION, {
         connectorId,
-        status: OCPP16ChargePointStatus.AVAILABLE,
+        status: OCPP16ChargePointStatus.Available,
         errorCode: OCPP16ChargePointErrorCode.NO_ERROR,
       });
-      this.chargingStation.getConnectorStatus(connectorId).status =
-        OCPP16ChargePointStatus.AVAILABLE;
+      chargingStation.getConnectorStatus(connectorId).status = OCPP16ChargePointStatus.Available;
     }
     logger.warn(
-      this.chargingStation.logPrefix() +
-        ' Remote starting transaction REJECTED on connector Id ' +
-        connectorId.toString() +
-        ', idTag ' +
-        idTag +
-        ', availability ' +
-        this.chargingStation.getConnectorStatus(connectorId).availability +
-        ', status ' +
-        this.chargingStation.getConnectorStatus(connectorId).status
+      `${chargingStation.logPrefix()} Remote starting transaction REJECTED on connector Id ${connectorId.toString()}, idTag '${idTag}', availability '${
+        chargingStation.getConnectorStatus(connectorId)?.availability
+      }', status '${chargingStation.getConnectorStatus(connectorId)?.status}'`
     );
-    return Constants.OCPP_RESPONSE_REJECTED;
+    return OCPPConstants.OCPP_RESPONSE_REJECTED;
   }
 
   private setRemoteStartTransactionChargingProfile(
+    chargingStation: ChargingStation,
     connectorId: number,
     cp: OCPP16ChargingProfile
   ): boolean {
-    if (cp && cp.chargingProfilePurpose === ChargingProfilePurposeType.TX_PROFILE) {
-      this.chargingStation.setChargingProfile(connectorId, cp);
+    if (cp && cp.chargingProfilePurpose === OCPP16ChargingProfilePurposeType.TX_PROFILE) {
+      OCPP16ServiceUtils.setChargingProfile(chargingStation, connectorId, cp);
       logger.debug(
-        `${this.chargingStation.logPrefix()} Charging profile(s) set at remote start transaction on connector id ${connectorId}, dump their stack: %j`,
-        this.chargingStation.getConnectorStatus(connectorId).chargingProfiles
+        `${chargingStation.logPrefix()} Charging profile(s) set at remote start transaction on connector id ${connectorId}: %j`,
+        cp
       );
       return true;
-    } else if (cp && cp.chargingProfilePurpose !== ChargingProfilePurposeType.TX_PROFILE) {
+    } else if (cp && cp.chargingProfilePurpose !== OCPP16ChargingProfilePurposeType.TX_PROFILE) {
       logger.warn(
-        `${this.chargingStation.logPrefix()} Not allowed to set ${
+        `${chargingStation.logPrefix()} Not allowed to set ${
           cp.chargingProfilePurpose
         } charging profile(s) at remote start transaction`
       );
@@ -762,126 +906,235 @@ export default class OCPP16IncomingRequestService extends OCPPIncomingRequestSer
   }
 
   private async handleRequestRemoteStopTransaction(
+    chargingStation: ChargingStation,
     commandPayload: RemoteStopTransactionRequest
-  ): Promise<DefaultResponse> {
+  ): Promise<GenericResponse> {
     const transactionId = commandPayload.transactionId;
-    for (const connectorId of this.chargingStation.connectors.keys()) {
+    for (const connectorId of chargingStation.connectors.keys()) {
       if (
         connectorId > 0 &&
-        this.chargingStation.getConnectorStatus(connectorId)?.transactionId === transactionId
+        chargingStation.getConnectorStatus(connectorId)?.transactionId === transactionId
       ) {
-        await this.chargingStation.ocppRequestService.requestHandler<
+        await chargingStation.ocppRequestService.requestHandler<
           OCPP16StatusNotificationRequest,
           OCPP16StatusNotificationResponse
-        >(OCPP16RequestCommand.STATUS_NOTIFICATION, {
+        >(chargingStation, OCPP16RequestCommand.STATUS_NOTIFICATION, {
           connectorId,
-          status: OCPP16ChargePointStatus.FINISHING,
+          status: OCPP16ChargePointStatus.Finishing,
           errorCode: OCPP16ChargePointErrorCode.NO_ERROR,
         });
-        this.chargingStation.getConnectorStatus(connectorId).status =
-          OCPP16ChargePointStatus.FINISHING;
-        if (
-          this.chargingStation.getBeginEndMeterValues() &&
-          this.chargingStation.getOcppStrictCompliance() &&
-          !this.chargingStation.getOutOfOrderEndMeterValues()
-        ) {
-          // FIXME: Implement OCPP version agnostic helpers
-          const transactionEndMeterValue = OCPP16ServiceUtils.buildTransactionEndMeterValue(
-            this.chargingStation,
-            connectorId,
-            this.chargingStation.getEnergyActiveImportRegisterByTransactionId(transactionId)
-          );
-          await this.chargingStation.ocppRequestService.requestHandler<
-            OCPP16MeterValuesRequest,
-            OCPP16MeterValuesResponse
-          >(OCPP16RequestCommand.METER_VALUES, {
-            connectorId,
-            transactionId,
-            meterValue: transactionEndMeterValue,
-          });
+        chargingStation.getConnectorStatus(connectorId).status = OCPP16ChargePointStatus.Finishing;
+        const stopResponse = await chargingStation.stopTransactionOnConnector(
+          connectorId,
+          OCPP16StopTransactionReason.REMOTE
+        );
+        if (stopResponse.idTagInfo?.status === OCPP16AuthorizationStatus.ACCEPTED) {
+          return OCPPConstants.OCPP_RESPONSE_ACCEPTED;
         }
-        await this.chargingStation.ocppRequestService.requestHandler<
-          OCPP16StopTransactionRequest,
-          OCPP16StopTransactionResponse
-        >(OCPP16RequestCommand.STOP_TRANSACTION, {
-          transactionId,
-          meterStop:
-            this.chargingStation.getEnergyActiveImportRegisterByTransactionId(transactionId),
-          idTag: this.chargingStation.getTransactionIdTag(transactionId),
-        });
-        return Constants.OCPP_RESPONSE_ACCEPTED;
+        return OCPPConstants.OCPP_RESPONSE_REJECTED;
       }
     }
-    logger.info(
-      this.chargingStation.logPrefix() +
-        ' Trying to remote stop a non existing transaction ' +
-        transactionId.toString()
+    logger.warn(
+      `${chargingStation.logPrefix()} Trying to remote stop a non existing transaction ${transactionId.toString()}`
     );
-    return Constants.OCPP_RESPONSE_REJECTED;
+    return OCPPConstants.OCPP_RESPONSE_REJECTED;
+  }
+
+  private handleRequestUpdateFirmware(
+    chargingStation: ChargingStation,
+    commandPayload: OCPP16UpdateFirmwareRequest
+  ): OCPP16UpdateFirmwareResponse {
+    if (
+      OCPP16ServiceUtils.checkFeatureProfile(
+        chargingStation,
+        OCPP16SupportedFeatureProfiles.FirmwareManagement,
+        OCPP16IncomingRequestCommand.UPDATE_FIRMWARE
+      ) === false
+    ) {
+      logger.warn(
+        `${chargingStation.logPrefix()} ${moduleName}.handleRequestUpdateFirmware: Cannot simulate firmware update: feature profile not supported`
+      );
+      return OCPPConstants.OCPP_RESPONSE_EMPTY;
+    }
+    if (
+      !Utils.isNullOrUndefined(chargingStation.stationInfo.firmwareStatus) &&
+      chargingStation.stationInfo.firmwareStatus !== OCPP16FirmwareStatus.Installed
+    ) {
+      logger.warn(
+        `${chargingStation.logPrefix()} ${moduleName}.handleRequestUpdateFirmware: Cannot simulate firmware update: firmware update is already in progress`
+      );
+      return OCPPConstants.OCPP_RESPONSE_EMPTY;
+    }
+    const retrieveDate = Utils.convertToDate(commandPayload.retrieveDate);
+    const now = Date.now();
+    if (retrieveDate?.getTime() <= now) {
+      this.runInAsyncScope(
+        this.updateFirmware.bind(this) as (
+          this: OCPP16IncomingRequestService,
+          ...args: any[]
+        ) => Promise<void>,
+        this,
+        chargingStation
+      ).catch(Constants.EMPTY_FUNCTION);
+    } else {
+      setTimeout(() => {
+        this.updateFirmware(chargingStation).catch(Constants.EMPTY_FUNCTION);
+      }, retrieveDate?.getTime() - now);
+    }
+    return OCPPConstants.OCPP_RESPONSE_EMPTY;
+  }
+
+  private async updateFirmware(
+    chargingStation: ChargingStation,
+    maxDelay = 30,
+    minDelay = 15
+  ): Promise<void> {
+    chargingStation.stopAutomaticTransactionGenerator();
+    for (const connectorId of chargingStation.connectors.keys()) {
+      if (
+        connectorId > 0 &&
+        chargingStation.getConnectorStatus(connectorId)?.transactionStarted === false
+      ) {
+        await chargingStation.ocppRequestService.requestHandler<
+          OCPP16StatusNotificationRequest,
+          OCPP16StatusNotificationResponse
+        >(chargingStation, OCPP16RequestCommand.STATUS_NOTIFICATION, {
+          connectorId,
+          status: OCPP16ChargePointStatus.Unavailable,
+          errorCode: OCPP16ChargePointErrorCode.NO_ERROR,
+        });
+        chargingStation.getConnectorStatus(connectorId).status =
+          OCPP16ChargePointStatus.Unavailable;
+      }
+    }
+    await chargingStation.ocppRequestService.requestHandler<
+      OCPP16FirmwareStatusNotificationRequest,
+      OCPP16FirmwareStatusNotificationResponse
+    >(chargingStation, OCPP16RequestCommand.FIRMWARE_STATUS_NOTIFICATION, {
+      status: OCPP16FirmwareStatus.Downloading,
+    });
+    chargingStation.stationInfo.firmwareStatus = OCPP16FirmwareStatus.Downloading;
+    if (
+      chargingStation.stationInfo?.firmwareUpgrade?.failureStatus ===
+      OCPP16FirmwareStatus.DownloadFailed
+    ) {
+      await Utils.sleep(Utils.getRandomInteger(maxDelay, minDelay) * 1000);
+      await chargingStation.ocppRequestService.requestHandler<
+        OCPP16FirmwareStatusNotificationRequest,
+        OCPP16FirmwareStatusNotificationResponse
+      >(chargingStation, OCPP16RequestCommand.FIRMWARE_STATUS_NOTIFICATION, {
+        status: chargingStation.stationInfo?.firmwareUpgrade?.failureStatus,
+      });
+      chargingStation.stationInfo.firmwareStatus =
+        chargingStation.stationInfo?.firmwareUpgrade?.failureStatus;
+      return;
+    }
+    await Utils.sleep(Utils.getRandomInteger(maxDelay, minDelay) * 1000);
+    await chargingStation.ocppRequestService.requestHandler<
+      OCPP16FirmwareStatusNotificationRequest,
+      OCPP16FirmwareStatusNotificationResponse
+    >(chargingStation, OCPP16RequestCommand.FIRMWARE_STATUS_NOTIFICATION, {
+      status: OCPP16FirmwareStatus.Downloaded,
+    });
+    chargingStation.stationInfo.firmwareStatus = OCPP16FirmwareStatus.Downloaded;
+    await Utils.sleep(Utils.getRandomInteger(maxDelay, minDelay) * 1000);
+    await chargingStation.ocppRequestService.requestHandler<
+      OCPP16FirmwareStatusNotificationRequest,
+      OCPP16FirmwareStatusNotificationResponse
+    >(chargingStation, OCPP16RequestCommand.FIRMWARE_STATUS_NOTIFICATION, {
+      status: OCPP16FirmwareStatus.Installing,
+    });
+    chargingStation.stationInfo.firmwareStatus = OCPP16FirmwareStatus.Installing;
+    if (
+      chargingStation.stationInfo?.firmwareUpgrade?.failureStatus ===
+      OCPP16FirmwareStatus.InstallationFailed
+    ) {
+      await Utils.sleep(Utils.getRandomInteger(maxDelay, minDelay) * 1000);
+      await chargingStation.ocppRequestService.requestHandler<
+        OCPP16FirmwareStatusNotificationRequest,
+        OCPP16FirmwareStatusNotificationResponse
+      >(chargingStation, OCPP16RequestCommand.FIRMWARE_STATUS_NOTIFICATION, {
+        status: chargingStation.stationInfo?.firmwareUpgrade?.failureStatus,
+      });
+      chargingStation.stationInfo.firmwareStatus =
+        chargingStation.stationInfo?.firmwareUpgrade?.failureStatus;
+      return;
+    }
+    if (chargingStation.stationInfo?.firmwareUpgrade?.reset === true) {
+      await Utils.sleep(Utils.getRandomInteger(maxDelay, minDelay) * 1000);
+      await chargingStation.reset(OCPP16StopTransactionReason.REBOOT);
+    }
   }
 
   private async handleRequestGetDiagnostics(
+    chargingStation: ChargingStation,
     commandPayload: GetDiagnosticsRequest
   ): Promise<GetDiagnosticsResponse> {
     if (
-      !OCPP16ServiceUtils.checkFeatureProfile(
-        this.chargingStation,
+      OCPP16ServiceUtils.checkFeatureProfile(
+        chargingStation,
         OCPP16SupportedFeatureProfiles.FirmwareManagement,
         OCPP16IncomingRequestCommand.GET_DIAGNOSTICS
-      )
+      ) === false
     ) {
-      return Constants.OCPP_RESPONSE_EMPTY;
+      logger.warn(
+        `${chargingStation.logPrefix()} ${moduleName}.handleRequestGetDiagnostics: Cannot get diagnostics: feature profile not supported`
+      );
+      return OCPPConstants.OCPP_RESPONSE_EMPTY;
     }
-    logger.debug(
-      this.chargingStation.logPrefix() +
-        ' ' +
-        OCPP16IncomingRequestCommand.GET_DIAGNOSTICS +
-        ' request received: %j',
-      commandPayload
-    );
     const uri = new URL(commandPayload.location);
     if (uri.protocol.startsWith('ftp:')) {
       let ftpClient: Client;
       try {
         const logFiles = fs
-          .readdirSync(path.resolve(__dirname, '../../../../'))
+          .readdirSync(path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../../../../'))
           .filter((file) => file.endsWith('.log'))
           .map((file) => path.join('./', file));
-        const diagnosticsArchive =
-          this.chargingStation.stationInfo.chargingStationId + '_logs.tar.gz';
+        const diagnosticsArchive = `${chargingStation.stationInfo.chargingStationId}_logs.tar.gz`;
         tar.create({ gzip: true }, logFiles).pipe(fs.createWriteStream(diagnosticsArchive));
         ftpClient = new Client();
         const accessResponse = await ftpClient.access({
           host: uri.host,
-          ...(!Utils.isEmptyString(uri.port) && { port: Utils.convertToInt(uri.port) }),
-          ...(!Utils.isEmptyString(uri.username) && { user: uri.username }),
-          ...(!Utils.isEmptyString(uri.password) && { password: uri.password }),
+          ...(Utils.isNotEmptyString(uri.port) && { port: Utils.convertToInt(uri.port) }),
+          ...(Utils.isNotEmptyString(uri.username) && { user: uri.username }),
+          ...(Utils.isNotEmptyString(uri.password) && { password: uri.password }),
         });
         let uploadResponse: FTPResponse;
         if (accessResponse.code === 220) {
-          // eslint-disable-next-line @typescript-eslint/no-misused-promises
-          ftpClient.trackProgress(async (info) => {
+          ftpClient.trackProgress((info) => {
             logger.info(
-              `${this.chargingStation.logPrefix()} ${
+              `${chargingStation.logPrefix()} ${
                 info.bytes / 1024
               } bytes transferred from diagnostics archive ${info.name}`
             );
-            await this.chargingStation.ocppRequestService.requestHandler<
-              DiagnosticsStatusNotificationRequest,
-              DiagnosticsStatusNotificationResponse
-            >(OCPP16RequestCommand.DIAGNOSTICS_STATUS_NOTIFICATION, {
-              status: OCPP16DiagnosticsStatus.Uploading,
-            });
+            chargingStation.ocppRequestService
+              .requestHandler<
+                OCPP16DiagnosticsStatusNotificationRequest,
+                OCPP16DiagnosticsStatusNotificationResponse
+              >(chargingStation, OCPP16RequestCommand.DIAGNOSTICS_STATUS_NOTIFICATION, {
+                status: OCPP16DiagnosticsStatus.Uploading,
+              })
+              .catch((error) => {
+                logger.error(
+                  `${chargingStation.logPrefix()} ${moduleName}.handleRequestGetDiagnostics: Error while sending '${
+                    OCPP16RequestCommand.DIAGNOSTICS_STATUS_NOTIFICATION
+                  }'`,
+                  error
+                );
+              });
           });
           uploadResponse = await ftpClient.uploadFrom(
-            path.join(path.resolve(__dirname, '../../../../'), diagnosticsArchive),
-            uri.pathname + diagnosticsArchive
+            path.join(
+              path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../../../../'),
+              diagnosticsArchive
+            ),
+            `${uri.pathname}${diagnosticsArchive}`
           );
           if (uploadResponse.code === 226) {
-            await this.chargingStation.ocppRequestService.requestHandler<
-              DiagnosticsStatusNotificationRequest,
-              DiagnosticsStatusNotificationResponse
-            >(OCPP16RequestCommand.DIAGNOSTICS_STATUS_NOTIFICATION, {
+            await chargingStation.ocppRequestService.requestHandler<
+              OCPP16DiagnosticsStatusNotificationRequest,
+              OCPP16DiagnosticsStatusNotificationResponse
+            >(chargingStation, OCPP16RequestCommand.DIAGNOSTICS_STATUS_NOTIFICATION, {
               status: OCPP16DiagnosticsStatus.Uploaded,
             });
             if (ftpClient) {
@@ -892,7 +1145,7 @@ export default class OCPP16IncomingRequestService extends OCPPIncomingRequestSer
           throw new OCPPError(
             ErrorType.GENERIC_ERROR,
             `Diagnostics transfer failed with error code ${accessResponse.code.toString()}${
-              uploadResponse?.code && '|' + uploadResponse?.code.toString()
+              uploadResponse?.code && `|${uploadResponse?.code.toString()}`
             }`,
             OCPP16IncomingRequestCommand.GET_DIAGNOSTICS
           );
@@ -900,163 +1153,172 @@ export default class OCPP16IncomingRequestService extends OCPPIncomingRequestSer
         throw new OCPPError(
           ErrorType.GENERIC_ERROR,
           `Diagnostics transfer failed with error code ${accessResponse.code.toString()}${
-            uploadResponse?.code && '|' + uploadResponse?.code.toString()
+            uploadResponse?.code && `|${uploadResponse?.code.toString()}`
           }`,
           OCPP16IncomingRequestCommand.GET_DIAGNOSTICS
         );
       } catch (error) {
-        await this.chargingStation.ocppRequestService.requestHandler<
-          DiagnosticsStatusNotificationRequest,
-          DiagnosticsStatusNotificationResponse
-        >(OCPP16RequestCommand.DIAGNOSTICS_STATUS_NOTIFICATION, {
+        await chargingStation.ocppRequestService.requestHandler<
+          OCPP16DiagnosticsStatusNotificationRequest,
+          OCPP16DiagnosticsStatusNotificationResponse
+        >(chargingStation, OCPP16RequestCommand.DIAGNOSTICS_STATUS_NOTIFICATION, {
           status: OCPP16DiagnosticsStatus.UploadFailed,
         });
         if (ftpClient) {
           ftpClient.close();
         }
         return this.handleIncomingRequestError(
+          chargingStation,
           OCPP16IncomingRequestCommand.GET_DIAGNOSTICS,
           error as Error,
-          { errorResponse: Constants.OCPP_RESPONSE_EMPTY }
+          { errorResponse: OCPPConstants.OCPP_RESPONSE_EMPTY }
         );
       }
     } else {
       logger.error(
-        `${this.chargingStation.logPrefix()} Unsupported protocol ${
+        `${chargingStation.logPrefix()} Unsupported protocol ${
           uri.protocol
         } to transfer the diagnostic logs archive`
       );
-      await this.chargingStation.ocppRequestService.requestHandler<
-        DiagnosticsStatusNotificationRequest,
-        DiagnosticsStatusNotificationResponse
-      >(OCPP16RequestCommand.DIAGNOSTICS_STATUS_NOTIFICATION, {
+      await chargingStation.ocppRequestService.requestHandler<
+        OCPP16DiagnosticsStatusNotificationRequest,
+        OCPP16DiagnosticsStatusNotificationResponse
+      >(chargingStation, OCPP16RequestCommand.DIAGNOSTICS_STATUS_NOTIFICATION, {
         status: OCPP16DiagnosticsStatus.UploadFailed,
       });
-      return Constants.OCPP_RESPONSE_EMPTY;
+      return OCPPConstants.OCPP_RESPONSE_EMPTY;
     }
   }
 
   private handleRequestTriggerMessage(
+    chargingStation: ChargingStation,
     commandPayload: OCPP16TriggerMessageRequest
   ): OCPP16TriggerMessageResponse {
     if (
       !OCPP16ServiceUtils.checkFeatureProfile(
-        this.chargingStation,
+        chargingStation,
         OCPP16SupportedFeatureProfiles.RemoteTrigger,
         OCPP16IncomingRequestCommand.TRIGGER_MESSAGE
+      ) ||
+      !OCPP16ServiceUtils.isMessageTriggerSupported(
+        chargingStation,
+        commandPayload.requestedMessage
       )
     ) {
-      return Constants.OCPP_TRIGGER_MESSAGE_RESPONSE_NOT_IMPLEMENTED;
+      return OCPPConstants.OCPP_TRIGGER_MESSAGE_RESPONSE_NOT_IMPLEMENTED;
     }
-    // TODO: factor out the check on connector id
-    if (commandPayload?.connectorId < 0) {
-      logger.warn(
-        `${this.chargingStation.logPrefix()} ${
-          OCPP16IncomingRequestCommand.TRIGGER_MESSAGE
-        } incoming request received with invalid connectorId ${commandPayload.connectorId}`
-      );
-      return Constants.OCPP_TRIGGER_MESSAGE_RESPONSE_REJECTED;
+    if (
+      !OCPP16ServiceUtils.isConnectorIdValid(
+        chargingStation,
+        OCPP16IncomingRequestCommand.TRIGGER_MESSAGE,
+        commandPayload.connectorId
+      )
+    ) {
+      return OCPPConstants.OCPP_TRIGGER_MESSAGE_RESPONSE_REJECTED;
     }
     try {
       switch (commandPayload.requestedMessage) {
-        case MessageTrigger.BootNotification:
+        case OCPP16MessageTrigger.BootNotification:
           setTimeout(() => {
-            this.chargingStation.ocppRequestService
+            chargingStation.ocppRequestService
               .requestHandler<OCPP16BootNotificationRequest, OCPP16BootNotificationResponse>(
+                chargingStation,
                 OCPP16RequestCommand.BOOT_NOTIFICATION,
-                {
-                  chargePointModel:
-                    this.chargingStation.getBootNotificationRequest().chargePointModel,
-                  chargePointVendor:
-                    this.chargingStation.getBootNotificationRequest().chargePointVendor,
-                  chargeBoxSerialNumber:
-                    this.chargingStation.getBootNotificationRequest().chargeBoxSerialNumber,
-                  firmwareVersion:
-                    this.chargingStation.getBootNotificationRequest().firmwareVersion,
-                  chargePointSerialNumber:
-                    this.chargingStation.getBootNotificationRequest().chargePointSerialNumber,
-                  iccid: this.chargingStation.getBootNotificationRequest().iccid,
-                  imsi: this.chargingStation.getBootNotificationRequest().imsi,
-                  meterSerialNumber:
-                    this.chargingStation.getBootNotificationRequest().meterSerialNumber,
-                  meterType: this.chargingStation.getBootNotificationRequest().meterType,
-                },
+                chargingStation.bootNotificationRequest,
                 { skipBufferingOnError: true, triggerMessage: true }
               )
-              .then((value) => {
-                this.chargingStation.bootNotificationResponse = value;
+              .then((response) => {
+                chargingStation.bootNotificationResponse = response;
               })
-              .catch(() => {
-                /* This is intentional */
-              });
+              .catch(Constants.EMPTY_FUNCTION);
           }, Constants.OCPP_TRIGGER_MESSAGE_DELAY);
-          return Constants.OCPP_TRIGGER_MESSAGE_RESPONSE_ACCEPTED;
-        case MessageTrigger.Heartbeat:
+          return OCPPConstants.OCPP_TRIGGER_MESSAGE_RESPONSE_ACCEPTED;
+        case OCPP16MessageTrigger.Heartbeat:
           setTimeout(() => {
-            this.chargingStation.ocppRequestService
+            chargingStation.ocppRequestService
               .requestHandler<OCPP16HeartbeatRequest, OCPP16HeartbeatResponse>(
+                chargingStation,
                 OCPP16RequestCommand.HEARTBEAT,
                 null,
                 {
                   triggerMessage: true,
                 }
               )
-              .catch(() => {
-                /* This is intentional */
-              });
+              .catch(Constants.EMPTY_FUNCTION);
           }, Constants.OCPP_TRIGGER_MESSAGE_DELAY);
-          return Constants.OCPP_TRIGGER_MESSAGE_RESPONSE_ACCEPTED;
-        case MessageTrigger.StatusNotification:
+          return OCPPConstants.OCPP_TRIGGER_MESSAGE_RESPONSE_ACCEPTED;
+        case OCPP16MessageTrigger.StatusNotification:
           setTimeout(() => {
-            if (commandPayload?.connectorId) {
-              this.chargingStation.ocppRequestService
+            if (!Utils.isNullOrUndefined(commandPayload?.connectorId)) {
+              chargingStation.ocppRequestService
                 .requestHandler<OCPP16StatusNotificationRequest, OCPP16StatusNotificationResponse>(
+                  chargingStation,
                   OCPP16RequestCommand.STATUS_NOTIFICATION,
                   {
                     connectorId: commandPayload.connectorId,
                     errorCode: OCPP16ChargePointErrorCode.NO_ERROR,
-                    status: this.chargingStation.getConnectorStatus(commandPayload.connectorId)
-                      .status,
+                    status: chargingStation.getConnectorStatus(commandPayload.connectorId)?.status,
                   },
                   {
                     triggerMessage: true,
                   }
                 )
-                .catch(() => {
-                  /* This is intentional */
-                });
+                .catch(Constants.EMPTY_FUNCTION);
             } else {
-              for (const connectorId of this.chargingStation.connectors.keys()) {
-                this.chargingStation.ocppRequestService
+              for (const connectorId of chargingStation.connectors.keys()) {
+                chargingStation.ocppRequestService
                   .requestHandler<
                     OCPP16StatusNotificationRequest,
                     OCPP16StatusNotificationResponse
                   >(
+                    chargingStation,
                     OCPP16RequestCommand.STATUS_NOTIFICATION,
                     {
                       connectorId,
                       errorCode: OCPP16ChargePointErrorCode.NO_ERROR,
-                      status: this.chargingStation.getConnectorStatus(connectorId).status,
+                      status: chargingStation.getConnectorStatus(connectorId)?.status,
                     },
                     {
                       triggerMessage: true,
                     }
                   )
-                  .catch(() => {
-                    /* This is intentional */
-                  });
+                  .catch(Constants.EMPTY_FUNCTION);
               }
             }
           }, Constants.OCPP_TRIGGER_MESSAGE_DELAY);
-          return Constants.OCPP_TRIGGER_MESSAGE_RESPONSE_ACCEPTED;
+          return OCPPConstants.OCPP_TRIGGER_MESSAGE_RESPONSE_ACCEPTED;
         default:
-          return Constants.OCPP_TRIGGER_MESSAGE_RESPONSE_NOT_IMPLEMENTED;
+          return OCPPConstants.OCPP_TRIGGER_MESSAGE_RESPONSE_NOT_IMPLEMENTED;
       }
     } catch (error) {
       return this.handleIncomingRequestError(
+        chargingStation,
         OCPP16IncomingRequestCommand.TRIGGER_MESSAGE,
         error as Error,
-        { errorResponse: Constants.OCPP_TRIGGER_MESSAGE_RESPONSE_REJECTED }
+        { errorResponse: OCPPConstants.OCPP_TRIGGER_MESSAGE_RESPONSE_REJECTED }
+      );
+    }
+  }
+
+  private handleRequestDataTransfer(
+    chargingStation: ChargingStation,
+    commandPayload: OCPP16DataTransferRequest
+  ): OCPP16DataTransferResponse {
+    try {
+      if (Object.values(OCPP16DataTransferVendorId).includes(commandPayload.vendorId)) {
+        return {
+          status: OCPP16DataTransferStatus.ACCEPTED,
+        };
+      }
+      return {
+        status: OCPP16DataTransferStatus.UNKNOWN_VENDOR_ID,
+      };
+    } catch (error) {
+      return this.handleIncomingRequestError(
+        chargingStation,
+        OCPP16IncomingRequestCommand.DATA_TRANSFER,
+        error as Error,
+        { errorResponse: OCPPConstants.OCPP_DATA_TRANSFER_RESPONSE_REJECTED }
       );
     }
   }