I'm trying to monitor pulses from a Sensus Omni 3" Water meter. It should be fairly straightforward, but 3 hours of tinkering has left me frustrated.
Starting on Page 2-1 of this document: http://sensus.com/documents/10157/30922/OMNI%20Operation%20&%20Maintenance%20Manual.pdf
You can see the hookups necessary to obtain the pulse output. So I have a 12VDC power supply running my Arduino. I connect R to Vin. I connect B to GND. And I connect G to one of my digital input pins (D2). I have a pull-up resistor (10K) connected between +5V and Pin D2.
And I get nothing. I can see the pulse on the LCD screen on the meter, but can't detect anything on my Arduino, or even using a multimeter.
Any ideas? Any ideas on how to troubleshoot?