CoAP over DTLS sample client

Overview

This sample code shows a CoAP over DTLS client using mbedTLS on top of Zephyr.

Building and Running

Follow the steps for testing networking with Qemu.

Run the server application at samples/net/coaps_server, with the following command:

make server

In other terminal window, run this client application at samples/net/coaps_client:

make client

You will get the following output:

reply: 60 45 00 01 ff 54 79 70 65 3a 20 30 0a 43 6f 64 65 3a 20 31 0a 4d
49 44 3a 20 31 0a 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 (123 bytes)

From the server application directory the screen should display

*******
type: 0 code 1 id 1
*******
connection was closed gracefully
done

If the server does not receive the messages, restart the app and try to connect the client again.