Yes, it used to calibrate to 400 ppm and it didn't drop below that. But now it drops to 0 ppm. It's been like that for weeks. Note that the values still vary in a meaningful manner, but the minimum value is now 0 ppm rather than 400 ppm.
Hi,
I have a tinkerforge weather station to which I added a CO2 bricklet, among other sensors. Recently, the CO2 bricklet has started displaying inaccurate values, sometimes dropping to 0 ppm, even though the minimum reading should be around 400 ppm. Do you have any idea what might be causing this issue? Should I consider replacing the bricklet?