I’m testing the flow rate measurement capability of OSPI 2.2.0 on a raspberry pi zero 2w. I’ve attached a pulse generator to pin 8 (GPIO14) and set the pulse rate to 1. Per your comment stating, 10 clicks per second max pulse rate, I set the rate to 4hz 50% duty cycle ( 4 pulses per second). I manually ran a zone for 15 minutes. The reported flow rate on the UI during the on time ranged from 190 to 224. Each UI update was different.
I next reduced the pulse rate down to 0.5hz ( 1 pulse per 2 seconds). The reported flow rate on the UI ranged from 26 to 78. Approximately every other UI update was different. The magnitude of the flow rate variance limits the usefulness of this measurement capability. Is there a way to improve the measurement accuracy ?