AmazonIoTClient class didn't have Subscribe functionality

[hussainamir]

Dear AWS Developer team

AmazonIoTClient library can get shadow things, update shadow, delete shadow and publish message to any topic by using MQTT protocol. But this class didn't have functionality to subscribe any other user topics(i.e. "mytopic", "/home/bulb"). Kindly add this functionality. and also didn't have functionality to connect with aws iot via websockets

Describe the Feature

AmazonIoTClient should have ability to subscribe any topic, and also have ability to communicate via websocket protocol

Is your Feature Request related to a problem?

Yes, Right now I am using third party Mqtt library to subscribe messages from aws iot by "user topics". But the third party library have limitation in term of credentials. For example when I generate credentials via cognito users then aws iot access denied via using these library.

• 👋 I may be able to implement this feature request
• ⚠️ This feature might incur a breaking change

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This is a 🚀 Feature Request

[hussainamir]

Dear @ashishdhingra @steveataws @normj
Please implement the subscribe/web socket functionality into AmazonIoTClient class (AWSSDK.IoTData). AmazonIoTClient class have publish, get shadow, update thing shadow functionalities. but if user want to subscribe the aws iot core topic data then he didn't have any option by using aws official libraries.

Amazon give this functionality for other programming language i.e. java, python ,JavaScript but it is not for .net language.

If amazon implement or provide any other third party library which can connect aws iot core by using cognito user pool authentication then it will save our time.

we are developing .net Desktop app to monitor/control smart device data remotely.

[adrianwright]

Agreed that this would be useful.

[ashishdhingra]

@hussainamir Apologies for the delay. If possible, could you please point to repository or documentation for this functionality available in Java, Python, JavaScript, etc.?

[erikkanderson]

I too would like to add my name to the request to add in a subscribe capability to the IoTData library.

Currently my company has a desktop application, using uPLibrary.Networking.M2Mqtt, to implement IoT Data operations, including both publish and subscribe. We wrote our classes to provide support for shadow operations, including listening for changes to a shadow (using subscribe). All of this works well when we authenticate using IoT certificates. However now we are trying to extend support to allow authentication for cognito users, which has proven extremely difficult to implement. If this IoT Data library could be extended to support subscribing to a topic, it would go a long way in it's usefulness.

[arlyxiao]

@hussainamir Apologies for the delay. If possible, could you please point to repository or documentation for this functionality available in Java, Python, JavaScript, etc.?

@ashishdhingra
Here is the subscribe example from javascript/react
https://github.com/aws/aws-iot-device-sdk-js-v2/blob/main/samples/browser/react_sample/src/PubSub5.tsx