What is it?

Everyone knows Daikin make some of the best air conditioners out there. But their implementation of IoT (remote control over the Internet) is now totally cloud based, and they are even limiting the use of the API access rates, and still needs Internet to work. If you are planning on integrating your air conditioners into something like an MQTT or Home Assistant in your home or office, or simply want very basic web control / status for your units, this unit provides these features. It plugs in where the old Daikin WiFi module goes.

More info

This is an open source project and so anyone can sell this (with trademarks removed). This is the original Faikin board from the designer and coder.

Source code, PCB design, support, discussions, list of known compatible devices

Simple set up

Appears as access point with web setup page on 2.4GHz WiFi. Local web page control over WiFi, no app needed, does not need external internet, nor any sort of cloud service/signup.

Automated control is possible using an MQTT broker if required. Can integrate with Home Assistant via MQTT. Can also integrate with some BLE temperature sensor as external reference in room.

This is an assembled PCB, a component. No housing or leads supplied, fits the same leads as Daikin WiFi module. 3D case design published on github. You will need a lead for S21 or X50 port. See faikin.revk.uk for details of cables people have made themselves. Take all safety precautions if opening your air-con - at your own risk.

You need lead to connect to air-con, and this is at your own risk (disconnect power first). 0.1" jumper leads can work well for this.

Why did you make it?

I have a Daikin air-con and the cloud stuff was crap.

What makes it special?

Small, neat, simple to use.

A key feature is no login, no sign-up, no account, no cloud, no snooping, no AI, or any such, just local control, and link to local Home Assistant if you want.

Some boards have badly printed silkscreen on the back, refer to images here for GPIO/pins. Sorry for any inconvenience.

Country of origin

The board is made in China. It is code flashed, packaged, and shipped from UK. I have no idea what that might mean for import tariffs. All I know is that if there are import tariffs, it is you that have to pay them, sorry. Do check with your government before ordering if you are concerned.