Google Cloud announced that it’s shutting down its IoT Core service on August 16, 2023. The alternative for exchanging the data with the Google ecosystem is the Google Pub/Sub service destined to establish asynchronous communication between applications and solutions. With flespi you can publish telemetry data to Google Pub/Sub and then subscribe to the appropriate topics to get that data in the desired destinations.
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Create a project in Google Console. You will need to paste the project ID into the stream configuration later.
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Create appropriate topics.
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Create a flespi stream to publish messages to these topics. Specify your Google project ID (from step 1), service email (learn how to create a service account), and the private key for IAM authorization in the stream configuration:
Note: you can also specify a list of parameters (or all parameters) to be added as message attributes into the message.
Find more details on access control, authorization, and required permissions here. -
Subscribe the stream to devices to forward data from:
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Make sure the stream started sending messages:
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Subscribe to the topics from your target applications to get the updates instantly.
Troubleshooting
Stream will skip messages that do not confirm to the Google Pub/Sub service message limits. You can detect such messages under the non-zero skipped column in stream Logs. Currently we skip messages which:
- size is above 10MB;
- contain 101 or more attributes per message;
- size of any attribute key exceeds 256 bytes;
- size of any attribute value exceeds 1024 bytes;
To confirm to this limitations you may pass to Google only certain messages using validate_message option with some expression or leave in message certain parameters only using convert_message option.
Change log
To stay in sync with all improvements and changes to the Google Pub/Sub stream, subscribe to the change log on the forum.