Honeywell Particulate Matter Sensor

https://sensing.honeywell.com/honeywell-sensing-particulate-hpm-series-datasheet-32322550

example byte-array of sent packets during auto-send mode:

[ 66, 77, 0, 28, 0, 0, 0, 2, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 81, 0, 1, 1 ]