I am doing a market search looking for a flow meter and I encountered this Posifa PMF 2000 series that uses I2C communication.
Out of curiosity, I decided to write some code to read the measured values despite not owning the device yet. Then I started looking through the application notes.
Reading it, I could understand the first byte is used as an integrity check, but couldn't understand the other four bytes. I think the first two bytes would be the payload, but I am not sure, and I don't have any guesses regarding the high and low coefficient bytes.
What are these other bytes?
EDIT: Sorry, I used the wrong model and link, it's Posifa PLF 2000 series. The correct application notes' link is this one : correct applications note