I don’t think that post was incorrect, but I’m open to correction.
I expressed surprise that the purpleair would output decimal values, I didn’t state that it did not do so.
I suggested that if it did output decimal values then it must be averaging since the sensors used in the purpleair do not output decimal values. The purpleair uses the PMS5003 sensor, the datasheet is here. I am using a PMS5003. If there is any provision for decimal values in the data protocol then I have missed it :dontknow: