The feature support page shows Bluetooth as working in the M2 Airs. Is there a particular feature or compatibility issue that you’re waiting on?

Well now, wait just a minute…

Do you need to control the temperature remotely, or just switch it on? If the latter, could you just leave the existing potentiometer / power switch always in the on position and add a new zigbee relay to cut power to the whole works on & off?

Why buy new, when you can just trade it in for a new model in a few millennia? You know a solar system loses 20% of its initial value just by driving it off the lot?

This personal inventory project hasn’t been updated in a couple years, but looks Ike it could work for what you’re describing.