Currently there are 2 detection ranges you can select/set 2000ppm and 5000ppm see
https://github.com/UedaTakeyuki/mh-z19/wiki/CALIBRATION-&-detection-range
in the datasheet v1.5 in chapter 5 on page 5 there are 3 ranges indicated 2000, 5000 and 10.000.
Would it be possible to add the 10.000ppm range as a "detection_range_10000()" command to the code?
on page 8 of the datasheet the details are given.
Set 0~10000ppm detection range, send command: FF 01 99 00 00 00 27 10 2F