Also I would label the ports as probe, power, and fan.
I would change the PV to Pit Temp, and SV to Set Temp.
It would make more sense to English users.
And set default temp to F for American users.
Homemade Offset Reverse Flow Smoker.
Horizon 16" Classic
Homemade Cold Smoker from old IceBox
Cameron Stovetop smoker