HN is awesome sometimes, I actually just installed 3 of your devices in my ACs to get them all wifi enabled. Worked perfectly, thank you!

Is it possible to flash them from Google home firmware to esphome without USB? I might move away from Google home soon but I'd hate to have to reopen up my ACs again.

Awesome. I'm glad to hear that.

It's not possible to cross-flash a different firmware track over the air but since you're already using the Matter-compatible firmware, you can pair it directly with Home Assistant, fully local. It won't be as configurable as the ESPHome firmware, but it'll get you the controls you need.