https://devzone.nordicsemi.com/f/nordic-q-a/791/how-to-set-the-transmission-power-levelHi, We have a custom board with nrf51822 and we use chip antenna from ST BAL-NRF01D3, now the distance it support is very very short (less than 20 cm). So, please tell me, changing the transmission power level will increase the distance it support oren-USTelligent Community 13Wed, 30 Oct 2013 15:24:11 GMThttps://devzone.nordicsemi.com/thread/3972?ContentTypeID=1Wed, 30 Oct 2013 15:24:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:601d54d1-2f23-44d9-aa27-2b5dc2a44d29H&#229;kon Alseth<p>Hi,</p> <p>20 cm of range is very short. Normal range in 0 dBm is usually 10-15 meters in an office environment. Can you post your gerber files, so I can have a look at your layout?</p> <p>If you do not want to disclose your design to everyone, I would recommend that you create a case in the technical support page (&quot;My Page&quot; ) on our main site.</p> <p>To answer your original question: If you&#39;re using the S110 API, its the function call &quot;sd_ble_gap_tx_power_set()&quot; (defined in ble_gap.h). If not, then it&#39;s NRF_RADIO-&gt;TXPOWER = (int8_t) x;</p> <p>Best regards Håkon</p><div style="clear:both;"></div>