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UDMI / Docs / Specs / MQTT Client

MQTT Client

Connectivity

The client should implement exponential backoff in the event of a loss of connection to the broker up to a maximum interval period of 120 seconds between connection attempts, and then should continue connection attempts indefinitely.

Authentication

When connecting to the MQTT broker using simple username/password authentication (e.g. for local testing or when JWTs are not being used), the credentials are derived as follows:

• Username: The username is formatted as the path to the device, e.g. /r/{registry}/d/{device}.
• Password: The password is the first 8 characters of the sha256sum of the private pkcs8 file.

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