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..
Any thoughts?
Search found 4 matches
- 26 Mar 2019, 17:51
- Forum: ESP Easy: Hardware
- Topic: MH-Z19 calibration issues
- Replies: 15
- Views: 18313
- 22 Mar 2019, 11:24
- Forum: ESP Easy: Hardware
- Topic: MH-Z19 calibration issues
- Replies: 15
- Views: 18313
Re: MH-Z19 calibration issues
Thanks, i will try this one!
- 16 Mar 2019, 13:28
- Forum: ESP Easy: Hardware
- Topic: MH-Z19 calibration issues
- Replies: 15
- Views: 18313
Re: MH-Z19 calibration issues
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...
- 13 Mar 2019, 12:49
- Forum: ESP Easy: Hardware
- Topic: MH-Z19 calibration issues
- Replies: 15
- Views: 18313
MH-Z19 calibration issues
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...