Google Cloud IOT-通过 Firebase/云功能进行设备配置？

Question

I have been able to successfully receive state and telemetry from my iot device using mqtt->pubsub->firebase functions->FCM to an android app. My iot device is also registered to receive the config callback, and it successfully receives the current config mqtt message when the device connects.

Now, I would like to be able to use my android app to initiate a config message to send a run/stop command. I had thought I could accomplish this via an android api call or from within a cloud function. There don't seem to be any examples on the web for this.

This example appears to be intended to run on a 3rd party node.js server rather than from inside a cloud function or an android app: https://github.com/GoogleCloudPlatform/nodejs-docs-samples/blob/master/iot/manager/manager.js#L865

From within the cloud function it was very easy to use admin.firestore() and admin.messaging() to call functions and accomplish what I needed. However the IOT API's don't appear to work the same way. I'm clearly missing something.

So in short- How can I initiate an IOT config message from android or a cloud function? It would be great if I could access the other registry management functions as well.

Thanks in advance for any help.

Answer 1

You should be able to call a cloud function from the android app and then have that integrate with the IOT api's - you could also have the android client call the rest api's https://cloud.google.com/iot/docs/reference/rest/

DeviceManager also has a JAVA interface:

https://cloud.google.com/iot/docs/samples/device-manager-samples

Answer 2

Dazza5000 pointed me to the IOT Core API for Java:

https://developers.google.com/api-client-library/java/apis/cloudiot/v1

This will allow me to send config data to my IOT device from Android. I don't think this API can be called from a cloud function.

Answer 3

With Cloud Functions for Firebase , all you have to do to make a function you can directly invoke is create an HTTPS trigger . Then, when you have its URL that's shown after deployment, you can invoke that URL using whatever HTTP library is available on the device. For Android devices, URLConnection is the built-in option. There should be tons of examples of HTTP triggers (especially in the functions-samples repo) and URLConnection code that you can borrow to build this out.