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Fix detection range setting #3

merged 1 commit into from Jan 21, 2019


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commented Jan 21, 2019

Hi, I've tried to fix a problem with detection range setting on MH-Z19.

If you sent the original byte sequence for changing range to 0-2000ppm or 0-5000ppm to the sensor, range actually got set to 0-1000ppm. For some reason the bytes indicating the range have to be sent in an different order. I found out thaks to this analysis here:

Also, we need someone to test it on MH-Z19B too, I have only tested this with MH-Z19.

@UedaTakeyuki UedaTakeyuki merged commit a28b34a into UedaTakeyuki:master Jan 21, 2019


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commented Jan 21, 2019

Hi, David.

Thank you for your kindly help to test on MH-ZZ19 and fix.
Also the page you've indicated is so good informative for me. Thank you!

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