3.14 Clear Cache

The ClearCache message in OCPP 1.6J is sent by the central system to instruct the charge point to clear its locally stored data, such as cached configuration. The charge point acknowledges the request, confirming whether the cache was cleared successfully or if an error occurred.


API Syntax	Description	Input Params	Return Value
SetClearCacheStatus	This function sets the status of the Clear Cache response based on the provided status value.	CLEAR_CACHE_STATUS_T Status	void

Example:

void ClearAuthorizationCacheHandler(uint16_t responsecode)
{
   if(responsecode == CLEAR_CACHE_ACCEPTED) 
   {
     if(ClearAuthorizationCache() == AUTHORIZATION_CACHE_SUCCESS)
     {
        SetClearCacheStatus(CLEAR_CACHE_ACCEPTED);
     }
     else
     {
        SetClearCacheStatus(CLEAR_CACHE_REJECTED);
     }    
   }
   else
   {
     SetClearCacheStatus(CLEAR_CACHE_REJECTED);
   }
}


API Syntax	Description	Input Params	Return Value
ClearCacheInit	This function initializes the Clear Cache response status to "Rejected" by default.	void	void

Example:

 void OCPPMessagesInit(void)
{
    DataTransferInit();
    ResetInit();
    MeterValueStructInit();
    SetLocalListVersionNumber(DEFAULT_SEND_LOCAL_LIST_VERSION);   
    SetChargePointConnectorId(CHARGEPOINT_DEFAULT_CONTROLLER);
    SetChargePointError(NOERROR);
    SetChargePointStatus(AVAILABLE);
    SetAuthorizeStatus(AUTHORIZE_INVALID);
    SetRemoteStartTransactionStatus(REMOTE_START_STOP_REJECTED);
    SetOCPPWebsocketOnlineMode();
    UnlockConnectorInit();
    ReserveNowInit();
    ChangeAvailabilityInit();
    ClearCacheInit();
    ChangeConfigurationInit();
    CancelReservationInit();
    GetAllIDsFromDB();
    CheckAndStartClockAlignedMeterValueTimer();
}


Syntax	Description	Constants/Members
CLEARCACHE_RESPONSE_T	This structure contains the status of the Clear Cache response.	CLEAR_CACHE_STATUS_T status;
RX_CLEARCACHE_T	This structure contains the UUID for the Clear Cache request.	char uuid[];
CLEAR_CACHE_STATUS_T	This enum defines the possible statuses for a Clear Cache response.	CLEAR_CACHE_ACCEPTED CLEAR_CACHE_REJECTED