https://devzone.nordicsemi.com/f/nordic-q-a/5163/problem-in-changing-transmitter-power-settingWe are looking to change tx_power setting to Neg30 dBm and for this we have accessed NRF_RADIO-&gt;TXPOWER = (RADIO_TXPOWER_TXPOWER_Neg30dBm &lt;&lt; RADIO_TXPOWER_TXPOWER_Pos); When we put this code in BLE project, this line of code gets hang. Please leten-USTelligent Community 13Fri, 06 Mar 2015 21:54:55 GMThttps://devzone.nordicsemi.com/thread/18094?ContentTypeID=1Fri, 06 Mar 2015 21:54:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:857df123-4f11-458c-b6e8-7b3afd239e4dcece<p>Thank you Audun, it helped me resolve my issue.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/18093?ContentTypeID=1Thu, 15 Jan 2015 04:48:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ef2d0cc6-ca89-43a8-ab9b-d1bb634fac47Audun<p>Hi Cece,</p> <p>when you&#39;re running BLE (SoftDevice is enabled), you cannot access the radio peripheral directly. The SoftDevice will block direct access to the radio among other hardware. To change the tx power you should use the <a href="http://developer.nordicsemi.com/nRF51_SDK/doc/7.1.0/s110/html/a01049.html#ga0f1931af876bef39520c58de5ac060ca">sd_ble_gap_tx_power_set()</a> function instead.</p> <p>Audun</p><div style="clear:both;"></div>