https://devzone.nordicsemi.com/f/nordic-q-a/44703/sending-a-coap-request-using-esp32-connected-to-the-kitHello everyone, For simpilicity,assume i have a node that is connected to an esp32, that node is configured as a coap client(actually its a node that gathers coap requests from a lot of ble nodes), it forms the packets, sends it to esp32 over uart,en-USTelligent Community 13Tue, 12 Mar 2019 15:38:11 GMThttps://devzone.nordicsemi.com/thread/175737?ContentTypeID=1Tue, 12 Mar 2019 15:38:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4a3b7866-a8e0-404d-b623-419c908352dbHung Bui<p>Hi Jakes,&nbsp;</p> <p>Hope you will get help from others here. We (Nordic) are not very familiar with the ESP32 platform to help you on this.&nbsp;</p> <p>But just to clarify, which protocol you used to send packets from the coap client to esp32 via UART ? did you follow the <a href="https://openthread.io/guides/border-router">Thread Border Router</a> spinel protocol ?&nbsp;</p> <p>Or you make your own proprietary protocol on the esp32 ?&nbsp;</p> <p>The CoAP packet sending from ESP32 should be a normal COAP packet over UDP. I would assume these libraries should be able to do that :&nbsp;</p> <p><a href="https://github.com/espressif/esp-idf/tree/master/examples/protocols">https://github.com/espressif/esp-idf/tree/master/examples/protocols</a></p> <p><a href="https://github.com/hirotakaster/CoAP-simple-library">https://github.com/hirotakaster/CoAP-simple-library</a></p><div style="clear:both;"></div>