Thank you. I was trying to find an example with CoAP over DTLS (client and server) in the zephyr tree. However, I can not find any tutorial or any discussion about that. Also, in 1.9.2 zephyr docs there is a sample named "CoAP over DTLS sample server" which does not exist in the latest release of zephyr (after 1.13 is gone). Any help on that? I am really confused