"I'm doing some fll stuff and I need an ultrasonic sensor but when my parents purchased it I tried programing it and used online tutorials and stuff but IT DOESN'T WORK!! They even shipped me a brick from a totally different series! WHAT?! When I put my hand near it the thing reads 255 cm!! I try having it stop when it reaches a place but as long as its a tiny bit off it doesn't work. Both "eyes" have to detect the thing so you have to be crystal clear. Also, the gyro sensor turns 90 degrees when you set it to 80."