Feature: message notification

[proddy]

Discussed in #1848

^{Originally posted by proddy July 6, 2024}
Thinking of adding a small new feature to output notifications.

The command would be called message, and the data would be any string. When invoked, it writes it to the log (so also syslog) and publishes an MQTT Topic called message.

Combined with the new powerful condition logic in the Scheduler this could be used to trigger other events. For example Home Assistant or NodeRed would respond to an incoming MQTT message.

[proddy]

new command called system/message

[proddy]

This is in 3.7.0. We can extend later if needed or merge with the upcoming email service.