Sorry for digging up this old thread, but a few Qs:
1) did +/- relative adjustments ever get implemented? it doesn't work on my unit, so I assume not, but I also don't see a trac ticket.
2) Is there an event that triggers correctly when measured temperature changes? I see one in the advanced event editor, but it never triggers.
3) Is there a console command (MessageSend?) which will return the current thermostat measured temperature?
4) Is there a console command (MessageSend?) which will return the current thermostat set-temperature?
I'd like write a script to poll these values and log my furnace's duty cycle.