OK so i set up my device with:
STATE TOPIC: stat/sonoff_owl_lamp/POWER
COMMAND TOPIC: cmnd/sonoff_owl_lamp/power
ON PAYLOD: On
OFF PAYLOAD: Off
QOS: 0
I then fired up the application MQQT.fx on my mac, connected to my broker using MQTT.fx and subscribed to "#" (with out the quotes) which seems to be a wildcard for all topics.
From there i could see what topics changed by hitting "scan" on Topics Collector.
See if that gets you any further...
http://mqttfx.jensd.de[/quote]
I tried this early on, MQTT.FX does not see any messages being sent from Indigo. I tested both with a local MQTT broker and one on my Pi, both with and without authentication. In all four variations I do not see any messages being sent on any topic from the plugin (indigo). But if I manually send a message via the terminal, or from HASSIO it shows up in MQTT.FX so I know the broker is working properly.