https://devzone.nordicsemi.com/f/nordic-q-a/52890/how-to-add-channel-hopping-in-802-15-4-exampleHi, I am a beginner in nRF52840. I want to add a channel hopping feature in the 802.15.4 example . As per my understanding of source code, we can set the channel number by defining value for the &quot;CONFIG_TEST_CHANNEL&quot; macro in 802_15_4_config.h fileen-USTelligent Community 13Fri, 04 Oct 2019 07:37:18 GMThttps://devzone.nordicsemi.com/thread/213318?ContentTypeID=1Fri, 04 Oct 2019 07:37:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fd205c36-2659-47b4-a001-cce8b5359172haakonsh<p>The 802.15.4 MAC layer does not specify a channel hopping feature, that means that you will have to implement that yourself.&nbsp;<br /><br />You can change the channel a device&#39;s radio operates on by calling&nbsp;<a title="nrf_802154_channel_set" href="https://infocenter.nordicsemi.com/topic/sdk_tz_v3.2.0/group__nrf__802154.html?cp=5_3_5_2_0_17#gadc60ad976f01c4548b92d9be8ea6927c">nrf_802154_channel_set</a>. Since both sides of a link need to change at the same time you need to&nbsp;synchronize the channel hopping sequence.&nbsp;<br /><br /><br /></p><div style="clear:both;"></div>