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WifWaf / MH-Z19

For Arduino Boards (&ESP32). Additional Examples/Commands., Hardware/Software Serial
GNU Lesser General Public License v3.0
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Temperature values among different sensors #41

Closed homuhumushomu closed 2 years ago

homuhumushomu commented 3 years ago

I built 4 devices, all with the same components including a CO2 sensor, all running the same arduino software. I put them side by side and they report wildy different temperature values (14, 24, 38, 45). Have you seen this problem? What should be this value?

WifWaf commented 3 years ago

It's a compatibility issue with the newer sensor firmware changes - hope to have it fixed soon.

homuhumushomu commented 3 years ago

Is there any information I can provide to help you?

homuhumushomu commented 3 years ago

Does this affects the CO2 measurement? Because I am seeing a large variance among them a few days after calibration (around 370, 410, 430, 445) but a rather small standard deviation within each (around 5 ppm, 1000 measurements over from 0 to 3AM)

WifWaf commented 2 years ago

Only a year late, but this should have been fixed in 04a6f85f980cae100f6c9472a1bbe484cc10dd3c.