Hi, I have a Grove Pi attached to a Raspberry Pi running sensors for a robot. Recently I added two Grove Line Finder sensors attached to two digital ports on the Grove Pi. The data read back from the sensors does not correlate to the sensor output at all. For example I attached a voltmeter between sig and gnd on the sensors and I get 5V over a black background and OV over a white background as expected. However, using the code grove_line_finder.py to test the sensors the reported data does not match the sensor ouput. The reported output is mostly stuck at 0 while the sensor sig pin toggles between 0V and 5V.
I would really appreciate any feedback on what issues can occur with the digital ports on GrovePI or the Grove Line Finder.