Build a simple device that warns if CO₂ concentration in a room becomes a risk for COVID-19 aerosol infections.

CO2-Ampel / CO2-Traffic-Light to measure and show the carbon dioxide concentration in a room, based on Sensirion SCD30/SCD4x sensor and Microchip SAMD21 microcontroller

The CO2-Ampel detects the CO2 level in the surrounding air.

Measures the CO2 level in the room and gives a warning when to ventilate. All values are also distributed via MQTT.

Eine CO2 Ampel auf Basis von ESP/MHZ-19b/BME680

Simple CO₂ LED Meter

Build a simple device that warns if CO₂ concentration in a room becomes a risk for COVID-19 aerosol infections.