In BLE, does the master device keeps on performing channel sensing to identify which are used and which are unused?https://devzone.nordicsemi.com/f/nordic-q-a/53954/in-ble-does-the-master-device-keeps-on-performing-channel-sensing-to-identify-which-are-used-and-which-are-unusedI know that master sents &quot;LL_CHANNEL_MAP_REQ&quot; to slave to indicate that there is a new channel map. I want to know does master keeps on doing channel sensing to know which channels are currently free and which are not. Or does master perform channelen-USTelligent Community 13Mon, 04 Nov 2019 12:37:18 GMTRE: In BLE, does the master device keeps on performing channel sensing to identify which are used and which are unused?https://devzone.nordicsemi.com/thread/218204?ContentTypeID=1Mon, 04 Nov 2019 12:37:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7cb79fef-77cc-4a58-b36a-68b799f9cb8ehaakonsh<p>&quot;<span>I want to know does master keeps on doing channel sensing to know which channels are currently free and which are not.&quot;</span></p> <p><span>A master does not need to do this according to BT spec, it is an optional feature. None of the Softdevices for the nRF51 series have this functionality.&nbsp;<br /><br /><br /><br /></span></p><div style="clear:both;"></div>