Does anybody know what thermostat property is used for this?

[martijnt 3]

Today I noticed something in the Event Panel that I had not noticed before - and I would like to know what device "property" this data is coming from...

 

The image shows events that are generated for a Horstmann HRT4-ZW (a.k.a. Secure SRT321). Normally I would see the changes to the "value" property in the event panel and it would show something like "16.00 > 21.00" to indicate that the desired room temperature as set on the thermostat has changed from 16 to 21 degrees Celcius.

 

What I noticed now is updates like "0.00 > 1.00" and "1.00 > 0.00". These appear to represent the independent state-changes of the thermostat where "0.00 > 1.00" means that the thermostat is asking for heat (it wants to turn the boiler on) and "1.00 > 0.00" means that the thermostat is no longer asking for heat (it wants to turn the boiler off). These events started to show up whilst the heating zone was set to "away" mode with a fixed temperature. At some point the actual room temperature dropped below the configured temperature and therefore the thermostat started to ask for heat...

 

I have not been able to find out what device property is used for these signals. I would like to detect these changes using a scene - but in order to do that I need to know where it is coming from. Does anybody know?

 

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