RE: How to modify Tx Power and Mode of NRF52832 ?

awneil — Fri, 03 May 2019 07:40:18 GMT

[quote userid="7571" url="~/f/nordic-q-a/46835/how-to-modify-tx-power-and-mode-of-nrf52832/185046"]to adjust the TX output power you will need to use the sd_ble_gap_tx_power_set function in the SoftDevice API[/quote]

See: https://devzone.nordicsemi.com/f/nordic-q-a/37928/just-set-tx-power

RE: How to modify Tx Power and Mode of NRF52832 ?

bjorn-spockeli — Fri, 03 May 2019 07:28:04 GMT

Hi Saiteja,

the ble_app_uart_c example is a Bluetooth Low Energy Central example that uses the S132 SoftDevice. When the SoftDevice is enabled it takes control of several HW peripherals that are needed by the BLE protocol stack. The following peripherals are blocked from Application access

RADIO
TIMER0
RTC0
CCM
AAR
EGU4/SWI5
EGU5/SWI5

The SoftDevice also restricts access to certain peripherals, see Chapter 8System on Chip resource requirements in the S132 v3.0 SoftDevice Specification.

So in order to adjust the TX output power you will need to use the sd_ble_gap_tx_power_set function in the SoftDevice API. The SoftDevice is a BLE protocol stack so you can only switch between the BLE_1Mbit and BLE_2Mbit modulations. This is also done through the SoftDevice API. However, the S132 v3.x.x SoftDevicewhich is used in SDK v12.2.0 is a Bluetooth v4.2 stack, so it does not support the 2Mbit modulations, which is a Bluetooth 5 feature. If want to use this feature you need to migrate to a newer SDK and SoftDevice version, i.e. SDK v15.3.0 and S132 v6.1.1.

Best regards

Bjørn