message: Put the standard heartbeat first.
diff: @@ -289,7 +289,7 @@ export default class Constants {
  public static readonly WS_DEFAULT_RECONNECT_TIMEOUT = 30; // Seconds
  public static readonly OCPP_SOCKET_TIMEOUT = 30000; // 30 sec
  - public static readonly OCPP_HEARTBEAT_KEYS = Object.freeze(['HeartBeatInterval', 'HeartbeatInterval']);
  + public static readonly OCPP_HEARTBEAT_KEYS = Object.freeze(['HeartbeatInterval', 'HeartBeatInterval']);
  public static readonly MAX_DATE = new Date('9999-12-31Z23:59:59:999');
  public static readonly MIN_DATE = new Date('1970-01-01Z00:00:00:000');
  