Support for Aircon international Mini-Splits via ESPHome
This integration is still a little rough around the edges, but it works fully for controlling the AC and displays status info with only the occasional error. Most of those errors are related to less important things like outdoor unit temps, compressor speed, etc. It seems like some of the display errors may come from the unit itself reporting bad info.
I referenced the work of several others to make this happen:
- https://community.home-assistant.io/t/working-on-integration-for-hisense-aeh-w4a1-module/146243
- https://github.com/deiger/AirCon/
- https://github.com/simoneluconi/hisense-aeh-w4a1
This thread in particular was quite useful: deiger/AirCon#1
I'm using an ESP-12F (8266) with a serial to 485 adapter board and a generic adjustable DC-DC converter. I'll assume that if you're even thinking of replicating my results you're well capable of finding the necessary components on Amazon. Given how cheap PCBs are these days I may just spin a ESP-12F carrier board that can plug directly into the AC connector.
The pinout of the connector is:
- (Black wire) GND
- B-
- A+
- (Red wire) +5V