Water meter monitor with imp

water meter monitor

Just count the pulses from the water meter to one of the imp pins. Make sure the pulse voltage is less than 3.3 volts (you can use a simple voltage divider made by 2 resistors) You will have to calibrate the meter to find out the volume of liquid per pulse.

Basic use is described here or here.

It is designed for power rail of 5 to 24 vdc, so you cannot just use the 3v3 from the imp. The ouput seems to act as open collector, so you can use it with the imp by having a 10k pullup resistor to 3v3 which should give nice 3v3 pulses to read on an imp digital input.

Thank you so much. the 10k resistor worked :slight_smile: