The wolfMQTT client library has a Microsoft Azure IoT Hub example that demonstrates securely connecting over TLS provided by the wolfSSL embedded SSL/TLS library.
We setup a wolfMQTT IoT Hub on the Azure server for testing. We added a device called `demoDevice`, which you can connect and publish to. The example demonstrates the creation of a SasToken, which is used as the password for the MQTT connect packet. It also shows the topic names for publishing events and listening to `devicebound` messages.
Everyone deserves to have their IoT data secure, and wolfSSL provides the best libraries to accomplish that! Secure-IoT-Love from the wolfSSL team!
You can download the latest release here: https://www.wolfssl.com/download/
Or clone directly from our GitHub repository: https://github.com/wolfSSL/wolfMQTT
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If you have any questions or run into any issues, contact us at facts@wolfssl.com, or call us at +1 425 245 8247.