Control electric windows based on sensor data or time.
Hardware hooks in parallel to existing buttons used to control windows.
Preferences can be set from a menu. If device screen is off, press any keys to turn it on, then press any key again to open preferences. Navigate preferences with up and down buttons. Select for change with middle button. Change value with up and down. Confirm change with middle button. Save preferences by selecting Go Back which will bring you to the main screen.
WiFi and MQTT is configured using a computer or mobile device. If not connected before, an access point will be available. Connect to it and choose WiFi network the device should connect to.
Set MQTT details to have events logged. Tested with Adafruit IO.
ESP32.
240x240px IPS screen.
MH-Z19B CO2 reader.
DHT temperature and humidity sensor.
LED for signaling high CO2 level.
Simple voltage divider for reading 24v signal from existing system.
MOSFET for allowing 24v signal to pass trough, emulating button press.
Written in Arduino IDE 2.0.
Coded in C.
Extra Fonts
Modifying font
https://tchapi.github.io/Adafruit-GFX-Font-Customiser/
Boxes for installing the components are modelled in Fusion 360.
These libraries needs to be installed in Arduino IDE to be able to build.
EspSoftwareSerial by Dirk Kaar, Peter Lerup
https://github.com/plerup/espsoftwareserial/
MH-Z19 by Jonathan Dempsey
https://github.com/WifWaf/MH-Z19/blob/master/examples/RetrieveDeviceInfo/RetrieveDeviceInfo.ino
GFX Library for Arduino by Moon On Our Nation
https://github.com/moononournation/Arduino_GFX/blob/master/examples/HelloWorld/HelloWorld.ino
FTDebouncer by Ubi de Feo
https://github.com/ubidefeo/FTDebouncer
DHT sensor library by Adafruit
https://github.com/adafruit/DHT-sensor-library
WiFiManager by tzapu
https://github.com/tzapu/WiFiManager
PubSubClient by Nick O'Leary