UI3-217
Version 217
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Each UI3 MQTT client now publishes a randomly-named retained subtopic to
ui3/instance_id/online
indicating that it is online and configured to publish, subscribe, or both. This topic is cleared when the client disconnects. 3rd-party applications may use this information to learn how many UI3 instances are currently connected to MQTT at any given time. -
Improved behavior when rapidly toggling the MQTT client on and off.