Sell Air Conditioner Control Module. Local & Fast

[dzungpv (Viet Dzung)]

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:

Log into Facebook

Or Telegram group: Telegram: View @gssmartgroup
Email us: [email protected]

[dzungpv (Viet Dzung)]

This is open source firmware for Mitsubishi Electric CN105 GitHub - dzungpv/mitsubishi2MQTT: Mitsubishi Electric CN105 to MQTT with ESP8266/ESP32 module

[dzungpv (Viet Dzung)]

Mitsubishi Heavy Industries VRF connect over XY port

[dzungpv (Viet Dzung)]

York/Hitachi/Hisense VRF: Two ways solution, you can read the sensor status and can control the AC same with wall remote

[dzungpv (Viet Dzung)]

Daikin Altherma 3 module HA screenshot.
Two ways solution, you can read the sensor status and can control the AC same with wall remote (EKRUCBL3, EKRUCx, MMI)
Demo video: https://www.youtube.com/watch?v=KCRc-m9PgUI

[Watcher1 (John)]

does it support LG split unit model Z12EM.NSH ?

[dzungpv (Viet Dzung)]

Does it has wall remote? you can send the picture of it, or you can find the CN_Remo port on the main board

[Watcher1 (John)]

it has only IR remote and i found a CN_Link port

[dzungpv (Viet Dzung)]

We are not support it for now

[dzungpv (Viet Dzung)]

Daikin ERV/HRV supported.

[Watcher1 (John)]

I bought your Daikin P1P2 controller but i couldnt get it to work consistently because of poor wifi connectivity. I even extended the wiring so that it was something like 3m from the Access Point, the signal was strong but after a while the connection was still broken. This continuous on and off pattern even caused problems with my AC, so i had to disconnect it. I am sorry but.. not happy,

[dzungpv (Viet Dzung)]

Do you contact us on the email, telegram or Messenger? Send me your tracking code we will support you, we can remote debug it, I search your name "John" but do not find your order.
We can debug it and find the real problem, it may cause by not proper install like place near metal, or like in a Faraday cage.