NullPointerException occurs in running a tutorial code building a simple LwM2M Client about leshan

[sbernard31]

Is the tutorial code incomplete? or did I miss something?

Not really the turorial says : "To develop your client you need to use the leshan-client-cf module. To know the last 1.x version."

👆 it is about Leshan version 1.x

For now there is no tutorial for version 2.x. 😞

So

• either you can live with LWM2M v1.0.x and you can use Leshan v1.x and use the tutorial as it.
• or if you need LWM2M v1.1.x, you need to go with the in-developement version of Leshan v2.x. and there is no tutorial for now, but you could look at leshan-client-demo as example to fix the tutorial OR look at #1323 (for client API).

To learn more about new endpoint provider API (client, server, bootstrap server) : #1025 (comment)

[JeonghyunJoo]

Thanks @sbernard31

You are right! I could make it run by modifying the Leshan version from 2.0.0-m14 to 1.5.0