| .. _coap-client-sample: |
| |
| 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 :ref:`networking_with_qemu`. |
| |
| Run the server application at samples/net/coaps_server, with the following |
| command: |
| |
| .. code-block:: console |
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| make server |
| |
| In other terminal window, run this client application at samples/net/coaps_client: |
| |
| .. code-block:: console |
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| make client |
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| You will get the following output: |
| |
| .. code-block:: console |
| |
| 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 |
| |
| .. code-block:: console |
| |
| ******* |
| 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. |
| |