Send COAP messages from a computer to the nrf5340 CoAP server via my border router. Is that possible? And if So, How?

RE: Send COAP messages from a computer to the nrf5340 CoAP server via my border router. Is that possible? And if So, How?

JONATHAN LL — Thu, 28 Oct 2021 14:37:17 GMT

Can you share ipconfig from the border router? Since this is a public ticket I recommend that you send me a DM with the ipconfig info, so that you don't share anything you don't want to to the public.

It might be that the router you is the cause of the issue.
Older case with related issue: https://devzone.nordicsemi.com/f/nordic-q-a/29063/how-do-i-forward-ipv6-prefix-into-thread-network-to-reach-coap-server

Regards,
Jonathan

RE: Send COAP messages from a computer to the nrf5340 CoAP server via my border router. Is that possible? And if So, How?

kakadua — Thu, 28 Oct 2021 14:12:06 GMT

Thanks! There is only one problem with the coap server example of the nrf SDK. If I add it to the thread network, it doesn't get an IP address with the OMR prefix (a normal CLI example get the OMR prefix, and I could ping it from my local PC). I do not know if you have already answered this question with the links you sent. If so, can you explain what is causing this problem?
Many thanks for considering my request.

RE: Send COAP messages from a computer to the nrf5340 CoAP server via my border router. Is that possible? And if So, How?

JONATHAN LL — Thu, 28 Oct 2021 13:51:56 GMT

Have a update for you, I might not have the perfect answer but should be able to help you along the way.

If wat you want is to send a CoAP message from a local PC on the same network or a cloud server?
If you have IPv6 connection to the Thread node and the CoAP server then you can just use IPv6 address directly, If you don't have a global IPv6 then you have to use IPv4, here is a link to a previous answer here on Devzone: https://devzone.nordicsemi.com/f/nordic-q-a/61283/how-to-ping-host-pc-from-thread-ftd/249798#249798

So you need the IP of your DK, you might be able to look it up from the border router. When it comes to the internet application then that is not relay our expertise, but feel free to ask about anything.

Adding som linke at the bottom here;
https://www.javacodegeeks.com/2018/11/coap-protocol-step-step-guide.html
https://docs.zephyrproject.org/latest/reference/networking/coap.html#coap-server
https://devzone.nordicsemi.com/f/nordic-q-a/29063/how-do-i-forward-ipv6-prefix-into-thread-network-to-reach-coap-server
https://devzone.nordicsemi.com/f/nordic-q-a/27543/how-to-control-coap-client-led-using-coap-server
https://devzone.nordicsemi.com/f/nordic-q-a/19100/no-ping-between-nrf52-coap-server-and-pc
https://devzone.nordicsemi.com/f/nordic-q-a/48493/coap-client-application-can-t-reach-nrf52840-coap-server-whereas-ipv6-pings-work

Regards,
Jonathan

RE: Send COAP messages from a computer to the nrf5340 CoAP server via my border router. Is that possible? And if So, How?

kakadua — Wed, 27 Oct 2021 14:45:34 GMT

Thanks for already updating me about this update! I will look forward to your answer friday

RE: Send COAP messages from a computer to the nrf5340 CoAP server via my border router. Is that possible? And if So, How?

JONATHAN LL — Wed, 27 Oct 2021 14:18:57 GMT

Hi, will look in to this an update you on Friday.

Regards,
Jonathan