Thanks for the logs! I don't see anything obvious to indicate your Thermostat is using Celsius. Oddly enough my Nest thermostats (using this driver) have an attribute tempScale: FAHRENHEIT.
Anyway, I think maybe I could just look at the setpoint values.. If the value is < 50 it's probably C and all I'd be doing anyway is making the up/down arrows increment by .5 instead of 1
