https://devzone.nordicsemi.com/f/nordic-q-a/81244/uart-0-access-in-openthread-cliI have successfully formed a mesh and sending data in the format as below &quot; udp send ff03::1 1234 $01 &quot; to udp &#39;1234&#39; socket &quot; udp send ff03::1 1234 $02 &quot; to udp &#39;1234&#39; socket &quot; udp send ff03::1 1234 $03 &quot; to udp &#39;1234&#39; socket &quot; udp send ff03en-USTelligent Community 13Wed, 03 Nov 2021 15:26:24 GMThttps://devzone.nordicsemi.com/thread/337325?ContentTypeID=1Wed, 03 Nov 2021 15:26:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:987f0264-e558-406b-bf15-010891cc7764Marjeris Romero<p>Hi,</p> <p>I see you are multicasting the messages, so you will need to have a node listening to the same UDP port. It could be another CLI node: <a title="https://github.com/openthread/openthread/blob/main/src/cli/readme_udp.md" href="https://github.com/openthread/openthread/blob/main/src/cli/README_UDP.md" rel="noopener noreferrer" target="_blank">https://github.com/openthread/openthread/blob/main/src/cli/README_UDP.md</a></p> <p>But if you want to toggle a GPIO, it would perhaps be easier to start from a normal application and then set up UDP: <a href="https://infocenter.nordicsemi.com/topic/sdk_tz_v4.1.0/group__api-udp.html?cp=8_3_5_0_0_2_3_0">https://infocenter.nordicsemi.com/topic/sdk_tz_v4.1.0/group__api-udp.html?cp=8_3_5_0_0_2_3_0</a></p> <p>Example of how this is done is in the CLI example: <a href="https://github.com/openthread/openthread/blob/main/src/cli/cli_udp.cpp">https://github.com/openthread/openthread/blob/main/src/cli/cli_udp.cpp</a></p> <p>Ex.: <a title="https://github.com/openthread/openthread/blob/main/src/cli/cli_udp.cpp#l122" href="https://github.com/openthread/openthread/blob/main/src/cli/cli_udp.cpp#L122" rel="noopener noreferrer" target="_blank">https://github.com/openthread/openthread/blob/main/src/cli/cli_udp.cpp#L122</a>&nbsp;og&nbsp;<a title="https://github.com/openthread/openthread/blob/main/src/cli/cli_udp.cpp#l87" href="https://github.com/openthread/openthread/blob/main/src/cli/cli_udp.cpp#L87" rel="noopener noreferrer" target="_blank">https://github.com/openthread/openthread/blob/main/src/cli/cli_udp.cpp#L87</a></p> <p>Best regards,</p> <p>Marjeris</p><div style="clear:both;"></div>