using easy components a simple and small CO2 ampel could be assembled
- Adafruit Feather-HUZZAH32
- wing from Guido Burger (Prototype, availability unknown)
- CO2-Sensor from Sensirion SCD30
all components could be assembled via headers or soldered. without any power saving implementation (WiFi, sensor sleep, Neopixel on/off) the configuration runs on battery for about 18h
