Hello, I created IoT central application and trying to implement device onboarding from IoT device source code. How could we register a device in IoT Central application with DPS Service from device source code.

There are some resources here that take you through the process of connecting a device to IoT Central and implementing the device code: https://learn.microsoft.com/en-us/azure/iot-central/core/tutorial-connect-device - this page has samples in multiple programming languages https://learn.microsoft.com/en-us/azure/iot-central/core/overview-iot-central-developer - this page is a conceptual overview of IoT Central device connectivity Please follow up with any additional questions :)

implementing IoT Central application

Accepted answer

Dom 1,631 Reputation points Microsoft Employee

2024-04-29T08:25:53.8566667+00:00
There are some resources here that take you through the process of connecting a device to IoT Central and implementing the device code:

https://learn.microsoft.com/en-us/azure/iot-central/core/tutorial-connect-device - this page has samples in multiple programming languages

https://learn.microsoft.com/en-us/azure/iot-central/core/overview-iot-central-developer - this page is a conceptual overview of IoT Central device connectivity

Please follow up with any additional questions :)
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Gorantla Srikanth 60 Reputation points

2024-04-29T08:56:42.3133333+00:00

I have created DPS Service, For that i need to connected to IoTHub or else is there any other process for IoT Central. And then where to get parameters like registartion_id and symmetrice key for connection.

Dom 1,631 Reputation points Microsoft Employee

2024-04-29T10:26:53.1133333+00:00

If you're using IoT Central, you don't need to create a DPS instance and you don't need an IoT Hub. IoT Central includes these services internally. If you follow the IoT Central guickstart (https://learn.microsoft.com/en-us/azure/iot-central/core/quick-deploy-iot-central), you'll see how to register a device and get the SAS key.

Gorantla Srikanth 60 Reputation points

2024-04-30T07:01:50.0266667+00:00

I need to register a device in iot central application from device source code using python. for getting the parameters like provisioning host,register_id, symmetrickey i need to do any configuration in iot central. How can communication happened between device source code and iot central application.

Dom 1,631 Reputation points Microsoft Employee

2024-04-30T08:56:46.5+00:00

There are three ways to register a device in IoT Central: automatically, bulk, or individually (see https://learn.microsoft.com/en-us/azure/iot-central/core/overview-iot-central-developer#register-a-device). For the automatic registration, all the device needs is the ID Scope value and a key or certificate derived from the enrollment group in your IoT Central application (see https://learn.microsoft.com/en-us/azure/iot-central/core/concepts-device-authentication#automatically-register-devices):

For bulk or individual registrations - you register the device in IoT Central before it connects - you can then find the device connection details in your IoT Central application:

Gorantla Srikanth 60 Reputation points

2024-04-30T11:12:55.34+00:00

can you please tell me how to request register a device in iot central application from device source code. I have used bellow code snippet. but i am getting 401 error even i put proper details.
provisioning_host = "global.azure-devices-provisioning.net"

registration_id1 = "3456" id_scope = "0ne*****" symmetric_key = "Sg*********" provisioning_device_client = ProvisioningDeviceClient.create_from_symmetric_key( provisioning_host=provisioning_host, registration_id=registration_id1, id_scope=id_scope, symmetric_key=symmetric_key, ) provisioning_device_client.provisioning_payload = {"modelId": "dtmi:azurecloudinterface:Customtemplate_3w7;1"} registration_result = await provisioning_device_client.register() print(registration_result) if registration_result.status == "assigned": print("Device registered successfully with DPS.") print("Assigned IoT Hub:", registration_result.registration_state.assigned_hub) print("The result",registration_result)

Dom 1,631 Reputation points Microsoft Employee

2024-04-30T13:03:41.8833333+00:00

I just tried your code and it works. I tried it in two scenarios:

I registered the device manually first by adding the device on Devices page in IoT Central - I then used the ID Scope, Device ID, and primary key from the Connect panel for the device.

I allowed the device to self-register. I used the ID scope from the "Device connection group" and generated a device key from the SAS in the enrollment group (see https://learn.microsoft.com/en-us/azure/iot-central/core/concepts-device-authentication#automatically-register-devices)

Gorantla Srikanth 60 Reputation points

2024-04-30T16:02:41.76+00:00

Is it possible to send files with this method? If yes is there any size limitations?

Dom 1,631 Reputation points Microsoft Employee

2024-05-01T11:47:33.6466667+00:00

I think you can attach a file to a comment here (click the paperclip) - there's a limit of 3 MB. I don't know what file types are allowed without trying.

Gorantla Srikanth 60 Reputation points

2024-05-02T06:18:42.2133333+00:00

Is there a size limitation on sending the file from device to cloud and vice versa, using IOT central. And how do I send the file using the same, if possible, any links could help.

Gorantla Srikanth 60 Reputation points

2024-05-02T06:31:47.09+00:00

hello again Dom,

I tried to run the code using in one of above-mentioned 2 scenarios by you, and I ended with the following error.

Unexpected failure azure.iot.device.exceptions.ServiceError: register request returned a service error status code 401 The above exception was the direct cause of the following exception: File"/home/yuvaraj/AzureIotEdgeModule/EdgeSolution/modules/EdgeSolution/modules/FileSent/main.py", line 91, in register_device_with_dps registration_result = await provisioning_device_client.register() File"/home/yuvaraj/AzureIotEdgeModule/EdgeSolution/modules/EdgeSolution/modules/FileSent/main.py", line 297, in <module> asyncio.run(register_device_with_dps()) azure.iot.device.exceptions.ClientError: Unexpected failure

Dom 1,631 Reputation points Microsoft Employee

2024-05-03T10:54:41.3266667+00:00

The most likely explanation for this error is that you're using the wrong SAS token - I get the same error if I deliberately send an incorrect token.

Dom 1,631 Reputation points Microsoft Employee

2024-05-03T10:56:32.86+00:00

You can send files from a device to IoT Central. See: https://learn.microsoft.com/en-us/azure/iot-central/core/howto-configure-file-uploads

Gorantla Srikanth 60 Reputation points

2024-05-08T03:57:19.85+00:00

Hello, how to send a file from iot central application to iot device. If possible attach sample code.
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