HTTP Protocol for IOT Hub Device to Cloud connection

Visnu Sangar 6

Earlier, IoT Hub supported both MQTT and HTTP Protocol. But now, it is supporting only MQTT Protocol. But our requirement is to follow the HTTP Protocol. How to implement the HTTP Protocol in IoT Hub?
Earlier it was PROTOCOL= IoTHubTransportProvider.HTTP

AshokPeddakotla-MSFT 35,766 Reputation points

2022-05-05T12:00:50.617+00:00
@Visnu Sangar Welcome to Microsoft Q&A forum!

Azure IoT Hub allows devices to use the following protocols for device-side communications:

MQTT

MQTT over WebSockets

AMQP

AMQP over WebSockets

HTTPS

You have mentioned, you would like to use HTTP protocol. Could you please share more details on the scenario more to understand better? Why do you want to use HTTP instead of HTTPS?
Have you looked at Choose a device communication protocol documentation?
AshokPeddakotla-MSFT 35,766 Reputation points

2022-06-09T11:39:06.127+00:00

@Visnu Sangar Wanted to follow up with you to understand whether the below information helped. Please let us know if there are any other queries.
If below suggestions answers your query, do click Accept Answer and Up-Vote for the same. And, if you have any further query do let us know.

1 answer

Sander van de Velde | MVP 34,371 Reputation points MVP

2022-05-05T13:49:20.857+00:00

Hello @Visnu Sangar ,

I'm not sure if any of the programming language SDKs give this limitation... the list @AshokPeddakotla-MSFT provides is correct.

Can you explain what you mean by "But our requirement is to follow the HTTP Protocol"?

Are you only allowed to communicate over HTTP(S) / REST calls?

Or, are you only allowed to communicate over port 443?

If you only can use HTTP(S) / Rest calls, you have to use the REST API (like in this old blog post). Next to that, Cloud-to-device messages will probably arrive delayed (up to 20 minutes).

If only Port 443 is allowed, Check out the MQTT/AMQP over websockets.
Please sign in to rate this answer.

1 person found this answer helpful.
Visnu Sangar 6 Reputation points

2022-05-12T07:33:02.967+00:00

Thanks @Sander van de Velde | MVP and @AshokPeddakotla-MSFT for replying,

Yeah, we can use HTTPS protocol instead of HTTP.

The following version 1 codes were working properly for HTTP Protocol
Version 1 codes:
PROTOCOL = IoTHubTransportProvider.HTTP
client = IoTHubClient(CONNECTION_STRING, PROTOCOL)
return client

The following codes are used currently in Version 2:
client = IoTHubDeviceClient.create_from_connection_string(CONNECTION_STRING)
return client

Since the protocol is not dedicated in version 2, it is transmitting data in MQTT Protocol automatically.
Here I need a python code for Transmitting data in HTTPS Protocol

I am using python for the codes.

Sander van de Velde | MVP 34,371 Reputation points MVP

2022-05-12T21:23:32.02+00:00

Hello @Visnu Sangar ,

so you are using the Python SDK. Did you check the GitHub resources already?

I checked the samples and found WebSocket support:

client = IoTHubDeviceClient.create_from_connection_string( CONNECTION_STRING, websockets=True) # used for communication over websockets (port 443)

This will reflect probably MQTT over Websockets. So it uses HTTPS ports but has the agility of MQTT.
Sign in to comment

Use comments to ask for clarification, additional information, or improvements to the question.

Share via

HTTP Protocol for IOT Hub Device to Cloud connection

1 answer

Your answer