https://devzone.nordicsemi.com/f/nordic-q-a/127871/ble-connect-distance-at-nrf51822-vs-nrf52832-using-sdk12-3-with-s132Dear: I am using SDK12.3 with S132 write application using BLE+DFU+UART+I2C, The device connects and communicates with mobile devices through our own application(ONF Link). 1.device follow example setting and producted at nRF51822 PCB ANT with deviceen-USTelligent Community 13Tue, 21 Apr 2026 13:43:06 GMThttps://devzone.nordicsemi.com/thread/565250?ContentTypeID=1Tue, 21 Apr 2026 13:43:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:52505174-843c-41af-b509-89bce5a2e4bbEinar Thorsrud<p>Hi,</p> <p>To set maximum Tx power for nRF51 in nRF5 SDK 12.3.0, you can use this snippet after initializing the SoftDevice BLE stack, but before you start to advertise:</p> <p><pre class="ui-code" data-mode="c_cpp">#define TX_POWER_LEVEL (4) // Maximum for nRF51 // In your initialization code err_code = sd_ble_gap_tx_power_set(TX_POWER_LEVEL); APP_ERROR_CHECK(err_code);</pre></p> <p>You can see something similar to this done in the ble_app_proximity example (examples/ble_peripheral/ble_app_proximity/main.c).</p><div style="clear:both;"></div>