What is the default tx power in nrf52 and How can we change it to other value?

RE: What is the default tx power in nrf52 and How can we change it to other value?

Sravanakumar — Wed, 29 Jul 2020 18:14:22 GMT

// SET HIGH TX POWER FOR ADVERTISING
uint32_t err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, -40);
APP_ERROR_CHECK(err_code);

RE: What is the default tx power in nrf52 and How can we change it to other value?

Jørgen Holmefjord — Mon, 11 Feb 2019 09:38:38 GMT

What source code? If you are using softdevice, changing TX power is a single function call, with a single parameter.

RE: What is the default tx power in nrf52 and How can we change it to other value?

Prarthana — Sat, 09 Feb 2019 19:02:06 GMT

Could you please share the source code for changing the TX power? for I'll be very grateful.

RE: What is the default tx power in nrf52 and How can we change it to other value?

Martin Muhady — Fri, 25 Jan 2019 19:33:36 GMT

Hi, good sample with description how to change TX power can find here https://github.com/NordicPlayground/nrf52-ble-multi-link-multi-role. I've learnt a lot from this sample about power consumption and coverage range.

RE: What is the default tx power in nrf52 and How can we change it to other value?

Jørgen Holmefjord — Wed, 02 Jan 2019 12:33:14 GMT

TX power configuration will not affect scannable range. You can use the RSSI that is present in the advertising packet struct to get an indication of the strength of the received signal, but note that RSSI is not a good indication of range. Beacons can transmit with different output powers, and interference/objects can reduce signal strength.

RE: What is the default tx power in nrf52 and How can we change it to other value?

shariq — Wed, 02 Jan 2019 12:16:41 GMT

Hi,

I have a similar application wherein I need to scan for beacons within a particular range(say 10m, 20m etc). Will the above answer help?

RE: What is the default tx power in nrf52 and How can we change it to other value?

Jørgen Holmefjord — Mon, 09 Jan 2017 08:57:55 GMT

Hi,

The default TX power with the softdevice is 0dbm. You can change the TX power using the softdevice function sd_ble_gap_tx_power_set().

Best regards, Jørgen