esphome-panasonic-ac VS esphome-mitsubishiheatpump

If you're handy with a soldering iron you could make a device to control most Panasonic inverters using this project https://github.com/DomiStyle/esphome-panasonic-ac

You didn't share the model number, but something like this should work: https://github.com/DomiStyle/esphome-panasonic-ac

Controlling Mitsubishi mini split heat pumps instead of paying hundreds for Mitsubishis solution: https://github.com/geoffdavis/esphome-mitsubishiheatpump

DIY Plug in: this Github Project describes a way to diy a plug in connection running on ESPhome for a few $ of parts, but I'm a bit of a novice and don't know how I would connect this to Homekit.

If you Home Assistant or ESPHome, this is the jam. https://github.com/geoffdavis/esphome-mitsubishiheatpump

Highly likely you're experiencing a watchdog error on an idle core. The only way to know for sure is to enable logger, which will be a challenge here. You can see an example here., but this is a widely reported and poorly understood issue.

If you can add homeassistant, you should look at https://github.com/geoffdavis/esphome-mitsubishiheatpump -- we're using it with 5 split units. It works great, is faster than infrared, and cheaper than the wired or wireless control options from Mitsubishi.

If your Mitsubishi uses IR for it's remote, this probably would work: https://github.com/geoffdavis/esphome-mitsubishiheatpump

Or, you can use a Broadlink IR blaster to clone the remote.

If your heat pump talks to MEL cloud (Mitsubishi's cloud thingy) then this should work: https://www.home-assistant.io/integrations/melcloud/

I have yet to buy a "smart" device that I haven't been able to control through HA. The Broadlink RF/IR bridges even makes anything with a remote automatable.

Seriously, If it wasn't for Home Assistant, the "smartness" of smart devices would be next to useless.