IoT Hub Direct Turn on/off devices

Umair Akhtar 41

Hi,

So I would like to know turn on/off commands for iot hub cloud to device communication. I have looked in to iot hub commands i.e. 'Reboot', 'SetTelemetryInterval' but I have not yet found commands to turn on/off devices. I have to describe code that sends commands to turn on/off the device. I am creating Azure function C# for this problem. Function will be called from PowerApps.

Thank you

AshokPeddakotla-MSFT 27,126 Reputation points

2022-11-10T16:24:49.537+00:00

@Umair Akhtar Welcome to Microsoft Q&A forum!

You can consider Direct methods which follows a request-response pattern and are meant for communications that require immediate confirmation of their result. For example, interactive control of the device, such as turning on a fan. Refer to Cloud-to-device communication guidance if in doubt between using desired properties, direct methods, or cloud-to-device messages.

I Suggest you check Understand and invoke direct methods from IoT Hub for more details.
AshokPeddakotla-MSFT 27,126 Reputation points

2022-11-15T14:11:39.05+00:00

@Umair Akhtar Did you get a chance to see my suggestions? Do let us know if that helps or have any further queries.
Umair Akhtar 41 Reputation points

2022-11-16T13:29:48.84+00:00

Well, I was able to create Azure function that can send direct method to turn on/off devices from power app. But what is the best way to do other C2D messages/direct method commands such as change device properties or run firmware update on the devices in bulk. Is doing it from PowerApp reliable? If not, what is the better way?
AshokPeddakotla-MSFT 27,126 Reputation points

2022-11-28T10:27:36.093+00:00

@Umair Akhtar Apologies for the delayed response.

I'm not familiar with Power Apps. Automatic device management in Azure IoT Hub automates many of the repetitive and complex tasks of managing large device fleets over the entirety of their lifecycles.

1 answer

Vishu Tyagi 1 Reputation point

2022-11-28T09:11:31.397+00:00

@Umair Akhtar
I think you should use the Device Update feature. It was in preview and recently added as GA.
https://learn.microsoft.com/en-us/azure/iot-hub-device-update/understand-device-update
You can run firmware updates with the help of this feature and combine it with automatic device management to categorize the devices and
run updates in batches.

and in case of running direct methods (giving and command device)you can use Jobs
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