Problem Reading UltrasonicSensor

[brian3f]

I'm new to using the Lejos NXJ software but have had some initial success. I'm stuck right now trying to get the UltrasonicSensor working. I'm unable to get readings off the sensor. I wrote a test program and no matter what the sensor is pointing at it reads 255. Below is my code:

Code: Select all

import lejos.nxt.*;

public class HelloWorld
{
  static UltrasonicSensor us = new UltrasonicSensor(SensorPort.S4);
  public static void main (String[] aArg)
  throws Exception
  {
     for (int i = 0; i < 100; i++) {
        LCD.drawString("count: " + new Integer(
              us.getDistance()).toString(),3,4);
        LCD.refresh();
        Thread.sleep(1000);
     }
   
  }
}


I'm using the win32 leJOS NXJ version 0.2.0 software.

Any help would be greatly appreciated,

Brian Fisher

[andren]

You can only connect the UltrasonicSensor to port S1

[lawrie]

I2C sensors including the Ultrasonic sensor currently work on ports S1, S2 and S3, but not S4.