https://devzone.nordicsemi.com/f/nordic-q-a/1618/nrf8001-settxpower-ends-with-device_state_invalidHi, I&#39;ve started developing some test applications for the nRF8001 to better understand all the ACI libraries and improve my knowledge of the chip. I&#39;m experiencing some problems with the SetTxPower command. Basically I would like to build a programen-USTelligent Community 13Thu, 06 Mar 2014 04:31:15 GMThttps://devzone.nordicsemi.com/thread/7122?ContentTypeID=1Thu, 06 Mar 2014 04:31:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:14364cb4-c393-4e17-9851-1f3d9c4059b8Soren<p>Table 31 illustrates the commands and events that are usable/accessible in each mode. The corresponding states are marked with an X. So <em>SetTxPower</em> only works in the Standby and Active modes.</p> <p>Since your Setup has been completed, my guess is that you must be in the Sleep mode. In that case, send a Wakeup (0x05) command before SetTxPower.</p><div style="clear:both;"></div>