Arduino Tellstick Co2 Sensor

Tellstick Air Quality Co2 Sensor

This prototype is based on Arduino Uno with a MQ135 Co2 Sensor and a FS1000A 433MHz module to send the measured data to a Tellstick DUO.
Power supply is a 5V USB 220V Power Plug

Arduino Tellstick Co2 Sensor
Arduino Tellstick Co2 Sensor

OpenHAB integration

Final solution will be built on base ATtiny85