[Bot190]

To elaborate on what Demosthenes2k8 said, The values you get are dependent on a couple things. First, the sensor has two outputs, one is normally high, while the other is normally low. Depending on which wire you hooked up to your Digital Sidecar will affect what you read in the code. Also, the sensors have an adjustment knob on them. The sensors will most likely have to be calibrated to work on what ever test surface you are using. Just make sure it has a good contrast.