Azure IoT Development Cookbook

How it works...

This IoT backend solution has created a connection to call a direct method on the device side. It creates a connection using the ServiceClient object to invoke the firmwareUpdate method on the device side.

The firmwareUpdate method downloads the update image file and then applies it on the device to update the firmware. As soon as the firmware is updated, the device twin properties are updated, so the IoT backend application can query to it and check the reported properties, thus validating the updated status.