topic_spec.md

Publisher's Topics config file

This JSON structure is a configuration file defines how every publisher publishs more than one topics.

It defines topics and their associated properties.

Fields and Their Meanings

topics array:

Contains a list of topic definitions. name string:

The unique identifier or name of the MQTT topic.

interval_ms string:

The interval in milliseconds between message injections for the topic. inject_timestamp boolean or string:

Controls whether a timestamp should be injected into the payload. If true, a timestamp is injected. If a string (e.g., "ms"), the timestamp format is specified.

QoS integer:

The Quality of Service level for the topic.

payload_encoding string:

The encoding format for the payload data.

"eterm" for Erlang Term Format.

"json" for json.

payload object:

The data payload for the topic, containing key-value pairs.

timestamp:

The initial timestamp or a placeholder.

Data: The actual data template to be transmitted.

Other fields (e.g., foo1, foo2, VIN) might have specific meanings depending on the application.

stream integer:

A logical stream identifier,

stream_priority integer:

The priority of the stream for the topic. Higher values indicate higher importance.

render string (optional):

how the data should be rendered with placeholder