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NXT Ultrasonic Sensor values not correct 
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Joined: Sat Jan 10, 2015 12:16 am
Posts: 5
Post NXT Ultrasonic Sensor values not correct
I have an NXT 2.0 system, that I haven't touched in months.

Today, I decided to tinker with it. I downloaded and installed Robot C 4.55. I applied the included firmware to the NXT.

But, the ultrasonic sensors are returning a value of 253 -- no matter how far away a solid object is.

Running "Try Me" shows a value of 253 too.

I tried reverting the firmware back to the stock Lego firmware and running "Try Me" again. With the Lego firmware I get a value of ???????

I tried switching wires, ports, sensors. I keep getting the same behavior.

Any ideas?


Thu Aug 10, 2017 5:32 pm
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