CC2340R5: TX POWER UPDATION DYNAMICALLY

Hi Tarek,

Thanks a lot for the clarification. I have few more doubts.

I have my code as below:

void connectionEventHandler(uint32 event, BLEAppUtil_msgHdr_t *pMsgData)
{
gapCbData_t connEvtData = {0};
switch (event)
{
case BLEAPPUTIL_LINK_ESTABLISHED_EVENT:
{
connEvtData.evt = BT_EVT_CONNECT;
connEvtData.error = ERR_SUCCESS;
pfnGapCb(connEvtData);
BLEAppUtil_advStop(peripheralAdvHandle_1);
uint8_t txPower = 8;
GapAdv_setParam(GAP_ADV_PARAM_TX_POWER, &txPower);
break;
}
case BLEAPPUTIL_LINK_TERMINATED_EVENT:
{
Log_message(LOG_INFO, "device is disconnected");
BLEAppUtil_advStart(peripheralAdvHandle_1, &advSetStartParamsSet_1);
break;
}
default:
{
Log_message(LOG_ERROR,"unhandled peripheral event");
break;
}
}
}

When connection is established, I updated the tx power and when disconnection happens, it should take the updated tx power right but its not getting updated. It is still showing 0dBm in nRF connect app when I am checking it. Or tx power is changing but since I have set 0 in adv data section and scan response data section it still shows 0 dbM but actually it is increased?

In the documentation it is mentioned as

@warning In order to set this parameter, @ref GAP_ADV_PARAM_PROPS must
* be set to include @ref GAP_ADV_PROP_TX_POWER

I am not able to understand how to include tx power in the GAP_ADV_PARAM_PROPS. In the sysconfig, I am not able to do so. Please guide me on this.

Also, this is advertising TX power setting. After connection, if I want to maintain higher tx power for sometime, which API shall I use and how? Please guide me as I cannot understand.

In your documentation, I have seen HCI_EXT_SetTxPowerDbmCmd(int8 txPower, uint8 fraction). Please explain which API shall I use that will correctly change the tx power during advertisement and after connection. My usecase is, when I press a given button, the advertising tx power shall increase to maximum and after connection with central, it will transmit data with maximum tx power and after execution of the command, I will move back to default 0 dbM value at connection and advertisement time.

Also whichever API I use, I need to stop advertisement and restart it right?

I have the code below

Hi Tarek,

Can you please confirm if HCI_EXT_SetTxPowerDbmCmd(int8 txPower, uint8 fraction) API alone will change the TX power during advertisement and after connection both or I have to use both GapAdv_SetParam for changing tx power during advertisement and HCI_EXT_SetTxPowerDbmCmd(int8 txPower, uint8 fraction) during connection??

Hi Tarek,

Thanks for the clarification. Changing advertisement parameters is not an issue for me. It's working properly. I just want to confirm if the HCI command is used for changing tx power during an active connection or not as in the API documentation nothing is mentioned exclusively.

How should I change tx power during active connection?

Thanks in advance.

Hi Tarek,

Thanks for the clarification.