I'm having trouble getting proper readings from a Parallax Ping. I've followed the tutorial on the Arduino site with no luck.
The problem I'm having is the readings in the serial monitor are mostly 0in or 4in. It never changes with different distance targets. The "active"LED flashes like units I've seen on YouTube.
It's a very simple set up, so I'm sure everything is hooked up and programmed correctly. Could this unit be defective?