Actually, I am just using this sample sketch from adafruit: adafruit/Adafruit-Flow-Meter · GitHub
I don't have common ground between the two microcontrollers… could that be the only issue?
Actually, I am just using this sample sketch from adafruit: adafruit/Adafruit-Flow-Meter · GitHub
I don't have common ground between the two microcontrollers… could that be the only issue?