The original CO2-Ampel was developed by purecrea GmbH and is available via Bastelgarage.ch and co2ampel.ch. The official firmware is open source and available on GitHub.
Specifications:
- ESP8266 micro controller
- Sensirion SDC30 CO2 sensor, additionally measuring temperature and relative humidity.
- WS2812B strip with 12 LED
- Photo resistor as ambient light sensor
- Push button