CODEWITHSUNDEEP
google-cloud-platformgoogle-cloud-functionsmqtt
Tiffany Choe
Tiffany Choe

Reputation: 11

Can a Google cloud function subscribe to an MQTT topic?

I am trying to listen to the MQTT commands topic. I am publishing messages to the MQTT commands topic through the Google IoT Core function sendCommandToDevice. Is there a way to use a Google cloud function to listen to the MQTT commands topic?

Here is the link to the documentation for the sendCommandToDevice function https://cloud.google.com/iot/docs/reference/cloudiot/rest/v1/projects.locations.registries.devices/sendCommandToDevice

Upvotes: 1

Views: 1071

Answers (1)

Gari Singh
Gari Singh

Reputation: 12053

You can trigger a Cloud Function from a message published to the IoT Core MQTT bridge.

Cloud Functions can be triggered via Google Cloud Pub/Sub Triggers. The IoT Core MQTT bridge actually forwards messages to Cloud Pub/Sub. By default, it forwards messages to the default telemetry topic specified when creating a device registry. Note: it is possible to configure multiple topics as well.

Putting this together, when you create a Cloud Function, you will then configure a the Cloud Pub/Sub trigger using the Pub/Sub topic associated with your device registry as described above.

Upvotes: 1

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