Azure IoT Development Cookbook

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The Azure function application has the advantage of being simple and flexible; it also provides a way to output triggers similar to the input trigger that we configured with IoT Hub.

Consider the scenario of raising a critical alarm once the temperature goes outside the permitted range. We can identify if the threshold is missed by the current temperature reading and we can send a command, cloud-to-device and back to the IoT Hub. We can even make use of custom endpoints and route the message to a new endpoint that a will have a different processing.

You can use the Microsoft Azure documentation to take function application to the next level, and build some interesting solutions using advance integrations of the IoT Hub.