LP-EM-CC2340R5: How to dynamic change advertising data?

Hello Aichi,

I am assuming you are using the latest SDK.

I would suggest looking into our training material here. Especially the "Advertising Task 2 – Change the Advertisement Data".

I think you may be missing to disable advertising first (for example GapAdv_prepareLoadByBuffer() will automatically  for all advertising handles that use this buffer) .

Also, don't forget to enable again the GAP_ADV_EVT_MASK_START flag as part of the GAP_ADV_EVT_MASK_ALL that you disabled for power testing (if not yet enabled again).

Then, you could do something like this:

BLEAppUtil_EventHandler_t peripheralAdvHandler =
{
    .handlerType    = BLEAPPUTIL_GAP_ADV_TYPE,
    .pEventHandler  = Broadcaster_AdvEventHandler,
    .eventMask      = BLEAPPUTIL_ADV_START_AFTER_ENABLE |
                      BLEAPPUTIL_ADV_END_AFTER_DISABLE |
                      BLEAPPUTIL_ADV_START
};

void Peripheral_AdvEventHandler(uint32 event, BLEAppUtil_msgHdr_t *pMsgData)
{
   switch(event)
   {
        .
        .
        .
        
        case BLEAPPUTIL_ADV_START:
        {
            updateAdvData = false;
                
            //Don't free anything since we're going to use the same buffer to re-load
            status = GapAdv_prepareLoadByBuffer(broadcasterAdvHandle_1, GAP_ADV_FREE_OPTION_DONT_FREE);
                
            //Only update the data when return is successful
            if (status == SUCCESS)
            {
                // Sample buffer modification
                advData1[26] = new_value; //could be a global variable that is constantly incrementing here. 
                    
                // Reload buffer to handle
                // Here the advDataLen = sizeof(advData1) and it is setup in the app\_peripheral.c
                // under advSetInitParamsSet_1
                GapAdv_loadByHandle(broadcasterAdvHandle_1, GAP_ADV_DATA_TYPE_ADV, broadcasterInitAdvSet1.advDataLen, advData1);
            }
            break;
        }
    }
 }

Consider that doing this every time will increase max power consumption as you are constantly waking up to increase the manufacturer value at every advertisement start.

Please let me know how it goes.

BR,

David.