Hi everyone!
I’m glad to share an ESPHome component I’ve been working on for controlling Hitachi AC units through their proprietary serial protocol H-Link, making them fully integrated with Home Assistant - completely local and cloud-free!
This solution works similarly to Midea ESP dongles but with a few differences. It requires a step-down converter (12V → 5V) to power on the ESP board and uses the H-Link protocol, which is different from Midea’s.
I’ve also included basic technical details about the hardware in the README file, so feel free to check it out. I hope this helps anyone looking for reliable local control of their Hitachi AC units!
Cheers,
Max