Reviews of Gravity: Analog Infrared CO2 Sensor For Arduino (0~5000 ppm)

Was very quick to get working following the instructions from from https://wiki.dfrobot.com/ It's an extremely simple device to interact with assuming you have an ADC on your microcontroller. The readings fluctuate on startup and then become stable after after a few minutes. Some smoothing function applied to the output might be a good idea. Haven't calibrated yet or compared against a reference so can't comment on accuracy, calibration sounds easy (short 2 pins @ 400ppm CO2, which is roughly atmospheric levels). Absolute accuracy isn't all that important to me, I was curious as to if closing the door while sleeping was causing the room air to become to measurably stagnant.