Hello,
I am using nRF52840, SDK_16.0.0, S140 SoftDevice and Segger 4.16 for flashing the image. I am using ‘ble_app_blinky’.
I have few queries on setting Tx power level. I am using sd_ble_gap_tx_power_set() to change power level.
1) In example code what will be the default Tx power level.
2) To increase Tx power level during Advertisement I am adding below code within advertising_init(). Is this fine.
err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &adv_params);
APP_ERROR_CHECK(err_code);
err_code = sd_ble_gap_tx_power_set( BLE_GAP_TX_POWER_ROLE_ADV, m_adv_handle, 8); // Set to +8 dBm
APP_ERROR_CHECK(err_code);
3) Similarly, I want to increase Tx power during Connection established. For this, where can I call sd_ble_gap_tx_power_set(). Whether as part of conn_params_init() after ble_conn_params_init() or under BLE_GAP_EVT_CONNECTED case of ble_evt_handler().
sd_ble_gap_tx_power_set( BLE_GAP_TX_POWER_ROLE_CONN, m_conn_handle, 8); // Set to 8 dBm
4) Once after disconnection we need Advertisement packets to be stared. Once again do we need to call sd_ble_gap_tx_power_set() as part of advertising_start() to set power level of Advertisement packet.
5) Need more inputs on below statement in ble_gap.h. Assume my Central / Initiator has 0 dBm and my Peripheral / Advertiser has 8 dBm. Once Connection request is received whether Peripheral Tx power will be changed from 8 dBm to 0 dBm.
“When a connection is created it will inherit the transmit power from the initiator or advertiser leading to the connection. “
6) In Advertisement or Connection mode whether can I change Tx power level dynamically. Use case is, when my battery is getting depleted I want to reduce Tx power level so that I can maintain better battery life. advertising_init() is called only once. Whether can I call sd_ble_gap_tx_power_set() as part of advertising_start().
Thanks & Regards
Vishnu Beema
