Setting advertising transmission power

[Ridhi]

i have nrf52832 sdk vr 17.0.2. i want to set transmission power of advertising packet. pls assist

[Karl Ylvisaker]

Hello,

You can set this using the sd_ble_gap_tx_power_set function directly.
As mentioned in the function API Reference you will need to enable include_tx_power for it to be included in your advertising packet.

Best regards,
Karl

[Ridhi]

 */
static void advertising_init(){
    ret_code_t             err_code;
    ble_advertising_init_t init;

    memset(&init, 0, sizeof(init));

    init.advdata.name_type                = BLE_ADVDATA_FULL_NAME;
    init.advdata.include_appearance       = true;
    init.advdata.flags                    = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
   
		init.srdata.uuids_more_available.uuid_cnt=sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
		init.srdata.uuids_more_available.p_uuids =m_adv_uuids;
    init.config.ble_adv_whitelist_enabled = false;
    init.config.ble_adv_fast_enabled      = true;
    init.config.ble_adv_fast_interval     = APP_ADV_INTERVAL;
    init.config.ble_adv_fast_timeout      = APP_ADV_DURATION;
    
    init.evt_handler = on_adv_evt;

    err_code = ble_advertising_init(&m_advertising, &init);
    APP_ERROR_CHECK(err_code);

    ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
		
		
		
		
		
}

where to add and what to add pls help

[Karl Ylvisaker]

The advertising handle needs to be initialized before the sd_ble_gap_tx_power_set call.

Add the following at the end of the advertising_init function:

    ..
    int8_t tx_power_level = 4;

    err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, tx_power_level);
    APP_ERROR_CHECK(err_code);
    ..

You can check to see that the RSSI changes accordingly with any advertising scanner.

You might also read the answer by my colleague in this ticket for further detail.

Best regards,
Karl