C# How to update desired twin property of an Azure IoT Hub device

Question

I have registered the devices in IoT and the client application (device) can update reported twin properties. Now, I have to update desired twin properties from back end applica

Answer 1

Here's a sample on GitHub. And here's a tutorial.

Here is the relevant piece of code:

public async Task UpdateDesiredProperties(string deviceId)
{
    var twin = await _registryManager.GetTwinAsync(deviceId);

    var patch =
        @"{
        properties: {
            desired: {
              customKey: 'customValue'
            }
        }
    }";

    await _registryManager.UpdateTwinAsync(twin.DeviceId, patch, twin.ETag);
}