3.20 Remote Start Transaction

The RemoteStartTransaction message in OCPP 1.6J is sent by the central system to remotely start a charging session at a charge point. It includes the ID tag (for user authorization) and connector ID (to specify where to start charging). The charge point responds with a confirmation or error based on whether the session started successfully. This enables remote charging control.


API Syntax	Description	Input Params	Return Value
SetRemoteStartTransactionStatus	Sets the status for the Remote Start Transaction.	REMOTE_START_STOP_STATUS_T status	void

Example:


   char chargePointStatus[CHARGE_POINT_STATUS_SIZE];
            GetChargePointStatus(chargePointStatus);
            if((strncmp(chargePointStatus, "Charging", strlen(chargePointStatus)) == 0 ) || (remoteStartStatus == REMOTE_START_STOP_ACCEPTED))
            {
              LogDebug("APP_LOG", " Second Remote Start Transaction rejected \n");
              SetRemoteStartTransactionStatus(REMOTE_START_STOP_REJECTED);
              (void)SendRemoteStartTransactionResponse();
            }


API Syntax	Description	Input Params	Return Value
ResetRemoteStartAuthorizeRemoteTxRequestParms	Resets the authorization request parameters for the Remote Start Transaction.	void	void

Example:


    if (strncmp(authorizeRemoteTxRequests, "true", strlen(authorizeRemoteTxRequests)) != 0)
    {
        ResetRemoteStartAuthorizeRemoteTxRequestParms();
        int reservationId = 0;
        if (GetReserveNowStatus() == RESERVE_NOW_ACCEPTED)
        {
            GetReserveNowParams(&reserveParams);
            reservationId = reserveParams.reservationId;
        }
        else
        {
            LogDebug("APP_LOG", "ReserveNow status is not accepted\n\r");
        }
        UpdateAndSendStartTransaction(IdTag, 0, connectorId, reservationId);
    }


API Syntax	Description	Input Params	Return Value
GetRemoteStartConnectorIdParms	Retrieves the connector ID parameters for the Remote Start Transaction.	u_int32_t *connectorId	void

Example:

  GetRemoteStartConnectorIdParms((u_int32_t *)&connectorId);
                                if(strncmp(AuthorizeRemoteTxRequests, "true", strlen(AuthorizeRemoteTxRequests)) != 0)
                                { 
                                    if(reserveStatus ==  RESERVE_NOW_ACCEPTED)
                                    {
                                        GetReserveNowParams(&params);
                                        reservationId = params.reservationId;
                                    }
                                    else
                                    {
                                        reservationId = 0;
                                    }
                                    UpdateAndSendStartTransaction(IdTag, 0, connectorId, reservationId);                                  
                                }
                                else
                                {

                                }


API Syntax	Description	Input Params	Return Value
GetRemoteStartIdTagParms	Retrieves the ID tag parameters for the Remote Start Transaction.	char idTag[]	void

Example:

               GetRemoteStartIdTagParms(IdTag);
                GetRemoteStartConnectorIdParms((u_int32_t *)&connectorId);
                if(strncmp(AuthorizeRemoteTxRequests, "true", strlen(AuthorizeRemoteTxRequests)) != 0)
                                { 
                                    if(reserveStatus ==  RESERVE_NOW_ACCEPTED)
                                    {
                                        GetReserveNowParams(&params);
                                        reservationId = params.reservationId;
                                    }
                                    else
                                    {
                                        reservationId = 0;
                                    }
                                    UpdateAndSendStartTransaction(IdTag, 0, connectorId,


API Syntax	Description	Input Params	Return Value
RemoteStartTransactionInit	This function initializes the status to REMOTE_START_STOP_REJECTED and the authorization request to 0.	void	void

Example:

void OCPPMessagesInit(void)
{
    DataTransferInit();
    ResetInit();
    MeterValueStructInit();
    SetLocalListVersionNumber(DEFAULT_SEND_LOCAL_LIST_VERSION);   
    SetChargePointConnectorId(CHARGEPOINT_DEFAULT_CONTROLLER);
    ChargePointStatusInit();
    (void)SetAuthorizeStatus(AUTHORIZE_INVALID);
    SetOCPPWebsocketOnlineMode();
    UnlockConnectorInit();
    ReserveNowInit();
    ChangeAvailabilityInit();
    ClearCacheInit();
    ChangeConfigurationInit();
    CancelReservationInit();
    GetAllIDsFromDB();
    CheckAndStartClockAlignedMeterValueTimer();
    ClearChargingProfileInit();
    GetCompositeScheduleInit();
    GetLocalListVersionInit();
    SendLocalListInit();
    SetChargingProfileInit();
    TriggerMessageInit();
    RemoteStopTransactionInit();
    RemoteStartTransactionInit();
}


Syntax	Description	Constants/Members
RX_REMOTESTARTTRANSACTION_T	Structure to hold the details of a received Remote Start Transaction	char uuid[]; int connectorId; idToken idTag[]; int authorizeRemoteTxRequest; CSCHARGINGPROFILE_DATA_T csChargingProfile;
REMOTESTARTTRANSACTION_RESPONSE_T	Structure to hold the response of a Remote Start Transaction	REMOTE_START_STOP_STATUS_T status;
char *remoteStartTransactionStatusType[]	Array of status strings corresponding to the REMOTE_START_STOP_STATUS_T values	Accepted Rejected