Leshan LwM2M client - server connection issue

Hi Team,

I am running one issue with the Leshan server. Please help.

I have downloaded the zephyr project from the below link to explore the LwM2M client-server scenario: https://github.com/zephyrproject-rtos/zephyr

Summary: I have compiled and run the lwm2m client sample for ‘x86’ and I was able to connect the Leshan demo server running locally in the same Linux host machine. But as soon as I add the URI of the Leshan LwM2M server in the client code which is running remotely, I am unable to connect it.

Working setup locally:

• Run the lwm2m client for x86 on a Linux machine.
• Run the Lwm2m server locally using "leshan-server-demo.jar and I can see the client connected locally at http://localhost:8080/

A problem in connection of remote server:

• In the client app, the URI of the lwm2m server “coap://leshan.eclipseprojects.io:5683” is added to connect.
• Compiled the app for x86 and tried to run.
• But I am unable to connect to the server, I am getting the below error: net_lwm2m_rd_client: Cannot init LWM2M engine (-22)

Also, I have tried other links too like the following but no success:

• coap://leshan.eclipse.org:5783
• coap://leshan.iot-lab.info
• coap://5.39.83.206

Can you please help me with what I am missing here? I am attaching the whole error log for more information. Lwm2m_server_connection_error.txt

Thanks, Hardik

[Hard1kPrajapat1]

Yeah that I know. The port 5783 for non-secure and 5784 for secure communication. I thought the IPv4 also would be different. Okay, thanks for all your help Simon, you can close this ticket.

[sbernard31]

same machine but different coap port. (look at README to know the port 😉)