Hey everyone!
I’ve been working on this project for a long time, and I’m excited to finally share it with the community. My new Smart AC Module gives you complete control of your air conditioner locally, with zero reliance on the cloud.
What I Built
• 100% Local Control – Works offline, no cloud delays, no outages.
• Home Assistant Native – Integrates smoothly via MQTT or Matter, perfect for real-time automations.
• Supports Many Brands including:
Daikin (VRV/Skyair), Mitsubishi Electric, Mitsubishi Heavy (VRF XY), Panasonic, LG, Toshiba (VRF AB), Fujitsu, Hitachi, Midea, and more.
• Deep Monitoring – Status, temperature, fan speed, vane position, sensor data, and even AC error codes (P1P2 only) when you’re away.
• Easy Installation – Connect directly to AC communication ports such as CN105, P1P2, AB, S21, S403, etc.
• Open-source Friendly – Supports open-source code or ESPHome DIY firmware, or you can use my closed-source optimized firmware for better stability.
• Connection support: Wifi, Ethernet, RS485 and KNX
• Wall mount, cassette or multi systems support.
• Tested on many systems and actively maintained.
I’m a Home Assistant user for 7 years, and I’ve been using these AC modules in my own home during that entire time. I shared the early version of this project here long ago:
https://community.home-assistant.io/t/mitsubishi-electric-aircon-support-home-assistant-and-web-control-diy-esp-chip-over-cn105/
If anyone is interested in my module, I can ship to nearly anywhere in the world. I’m not listing prices here since it depends on the AC model and the shipping country.
You can find more details and community discussions in this Facebook group:
Or Telegram group: Telegram: View @gssmartgroup
Email us: [email protected]
