Got my new MH-Z19B today and replaced it.
Now i got the problem, that the ppm value stucks at 5000. Initially it shows 410ppm and (i guess after the boot process) it switches to 5000..
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Ok.. Thanks for your answer In the datasheet of the sensor, there is an explicit explanation under which conditions the sensor has to be calibrated. So i put it into an environment with 400ppm (~air outside) for 20 minutes after (and to be sure also before) i sent the calibration command. So basical...
Hi. I am already really frustrated with this and can't get it work properly, so i would thankful if someone could help me out here! That you can understand the issue i have with my MH-Z19, i'll describe the steps i did so far: I disabled ABC on my ESPEasy instance (version mega-20190305) I put the s...