https://devzone.nordicsemi.com/f/nordic-q-a/47421/problems-with-zigbee-sdkHi, I am using nrf52840 module with a kit that i built by myself. The kit is working because i am able to flash and debug without problems. I am using Segger embedded studio. I am trying to understand the sdk, so i tried with light bulb exampleen-USTelligent Community 13Tue, 21 May 2019 10:03:21 GMThttps://devzone.nordicsemi.com/thread/188187?ContentTypeID=1Tue, 21 May 2019 10:03:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:36520300-9e1d-4e38-ad19-88b057e0281aMarjeris Romero<p>Hi,</p> <p>Yes, our Zigbee stack uses ZBOSS 3.0 stack which is closed source. All our examples use channel 16 as default, so you need a coordinator listening on that channel for the device to join a network. Most probably the Echo Plus has&nbsp;already created a network using another channel.</p> <p>If you have a nRF52840 dongle you can use it as a sniffer to check in which channel the network is located, and you can change ZIGBEE_CHANNEL in the example for the right one.</p> <p>Best regards,</p> <p>Marjeris</p><div style="clear:both;"></div>