[jajabinx124]

Originally Posted by rich2202

If the sensors are not reading, some problems may be:
1) Sensor is not wired correctly
2) Sensor not connected to roborio correctly
3) Sensor class not properly created
4) Provided wrong port number to the sensor class
5) Not using the sensor class correctly to read the value.
6) Sensor is broken

Improper voltage to distance calculations may also cause that.. you never know some simple math could be the problem.