Connectecd ADV mode

[brain113]

Dear OpenWCH team. I'm designing peripherial device that should keep advettisement when connected. I found that updating GAPROLE_ADVERT_DATA parameter in connected and advertised mode causes change of GAP state from GAPROLE_CONNECTED_ADV to GAPROLE_ADVERTISING, but actually device keep to be connected and advertised.

How to reproduce with BLE_LIB 1.7: In Peripheral example add the following

    uint8_t gapRole_state;
    GAPRole_GetParameter(GAPROLE_STATE, &gapRole_state);
    PRINT("GAPROLE_STATE: %d\n", gapRole_state);

to the end of performPeriodicTask() function. And add the following

    uint8_t initial_advertising_enable = TRUE;
    GAPRole_SetParameter(GAPROLE_ADVERT_ENABLED, sizeof(uint8_t), &initial_advertising_enable);

to the end of Peripheral_LinkEstablished(...) func.

Now if you connected to the device, it reports GAPROLE_STATE: 5 in console. (GAPROLE_CONNECTED_ADV state). This is OK.

Next, add the following GAPRole_SetParameter(GAPROLE_ADVERT_DATA, sizeof(advertData), advertData); to the very end of performPeriodicTask() function (after printing added earlier).

Now if you connected to the device, it reports GAPROLE_STATE: 2. (GAPROLE_ADVERTISING). So, GAP role state was changed by updateing data to advertise. My expectation is that updating the adv data should not affect to GAP state.

[zerosensei]

Hi brain112,

GAPRole_SetParameter(GAPROLE_ADVERT_DATA, sizeof(advertData), advertData); This function is designed to be called in the initialization state，so it may cause status errors when called in other stages.

You can use this function to update the advertising data:

/**
 * @brief   Setup or change advertising and scan response data.
 *
 * @note    if the return status from this function is SUCCESS,the task isn't complete
 *          until the GAP_ADV_DATA_UPDATE_DONE_EVENT is sent to the calling application task.
 *
 * @param   taskID - task ID of the app requesting the change
 * @param   adType - TRUE - advertisement data, FALSE  - scan response data
 * @param   dataLen - Octet length of advertData
 * @param   pAdvertData - advertising or scan response data
 *
 * @return  SUCCESS: data accepted
 *          bleIncorrectMode: invalid profile role
 */
extern bStatus_t GAP_UpdateAdvertisingData( uint8_t taskID, uint8_t adType, uint16_t dataLen, uint8_t *pAdvertData );

This function wiil send a message to a valid taskID, if you use the Peripheral_TaskID, you can handle the message here:

static void Peripheral_ProcessGAPMsg(gapRoleEvent_t *pEvent)
{
    switch(pEvent->gap.opcode)
    {
        case GAP_ADV_DATA_UPDATE_DONE_EVENT:
            PRINT("%s data update status: %#x\n",
                       pEvent->dataUpdate.adType ? "adv" : "scan", pEvent->dataUpdate.hdr.status);
            break;
        ...

[brain113]

Hi zerosensei, This works! Thank you!