This piece of software is a thermostat, based on esphome / arduino, that drive airton AC's throught its available serial port.
"ESPAC" is available under two edition : "Wifi" (standalone webserver) and "Home assistant" with better integration.
It is a substitution to closed source "ACW02" wifi module / ref 409729, commonly sold with airton air conditioner, with my own QOL functionnalities added.
- Should Works with most Airton AC ( at least ref : 409934, 409935, 409936 )
- Automation : Automatic double setpoint thermostat
- Care : Timer protection - ensure compressor minimal runtime when kicked in.
- Controls : Modes (heat, cold...), flaps position, fan speed, screen on/off, beeper on/off
- Privacy : Lan communication through wifi (web server, home assistant api or both)
- Home Assistant thermostat card (Home Assistant edition)
- Customizable temperature sensor source (Home Assistant edition)
<proto
data-measurement="mm"
height="44"
width="36"
alt="9"
weigth="14" unit="g"
/>
It's small, light and easy to fit under the hood.
- Start Making your own
- Home Assistant edition
- Wifi edition
- Installation and first start
- Missing features to implement
- Support project
- Order wifi edition unit
| Hardware | ||
|---|---|---|
| ESP32 D1 mini | Required |  |
| JST connector - 4 pins - 2.54mm pitch | Required |  |
| 3D Printer | Optionnal |  |
That's it !
Of course, you also need a soldering iron and some tin to complete the job !
This is how to solder the jst connector's wires on the d1 mini.
| Wire | GPIO | Wire color D1 side | wire color AC side |
|---|---|---|---|
| 5V | VCC | Black | Red |
| Ground | GND | Yellow | Purple |
| TX | 16 | Red | Blue |
| RX | 17 | White | Green |
Small form factor case. Stl file avaiblable here
Home assistant edition has to be flashed on your own with your Home assistant api key.
- Configure a new esphome device with your api, ota, wifi informations.
- Add yaml configuration avaible here to your device configuration.
- Optional configuraion for an external temperature sensor. Please check yaml configuration.
- Compile and Flash firmware with usb cable.
- Plug device on indoor AC unit. see
- Device should be available in Home Assistant after soime time, then add it to you devices.
- Add a new card to your Home Assistant dashboard. Example thermostat configuration card is available here.
Home Assistant Thermostat Card
Wifi edition is web based thermostat, without esphome features, directly connected to your local network through your home wifi. You can configure your thermostat with any browser on any device connected to your local network.
- Download firmware from release page
- Flash firmware with usb cable
- Plug on ac unit ! see
- Connect to device temporary wifi Access Point, name "ESPAC", password "12345678".
- Open webpage http://192.168.1.4/, select your wifi network ssid, enter your wifi password, submit !
- Device will then connect to your network and get an internal ip adressfrom your DHCP.
- Connect to device with either mobile or desktop browser.
Standalone controls web interface
It's as simple as to plug 4 pin jst connector. Use some double tape to stick it to the main unit body. then :
- Red LED must light on immediatly. If not, press wifi button on your remote control.
- Wait until espac take control on device over serial. Blue light should blink at least once. If erverything is ok, it should kick in "fan_only" mode. ( can take up to 1 min )
Warning
Main voltage hazard. Please, security first ! if you dont know how to deal with main voltage and breaker, call an electrician.
- Eco mode
- Timer
- Humidity percent setting for "huimidity based" mode. (should be default 60% in actual state)
- Automatic profile switching ( ie day / night )
if you want to support hard work, you can buy me a beer
Thanks for your support !
You can order a "wifi edition" unit from buymeacoffee
All units are shipped "ready to plug" flashed with "wifi edition" firmware, also available on release page.
It can be flash with any edition you want though its usb-c port.
Thanks.
