Lejos RGB color sensor

Question

Does anyone have a code example of using the NXT RGB Color Sensor in the Lejos programming language. I have tried several different uses of setType() and setMode() but to no avail.

You may get a better response at chiphacker.com. – leppie Sep 28 '10 at 19:25 — leppie, Sep 28 '10 at 19:25

score 1 · Answer 1 · edited May 12 '13 at 01:59

Here is a simple example for monitoring the NXT 2 color sensor:

import lejos.nxt.*;
import lejos.robotics.*;

public class MyColorSensor {
    public static void main(String argv[]) {
        ColorSensor cs = new ColorSensor(SensorPort.S1);

        for(int i = 0; i < 10; i++) {
            Color color = cs.getColor();
            System.out.println("Color = " + cs.getColorID() + " " + color.getColor() +
                "(" + color.getRed() + "," + color.getGreen() + "," + color.getBlue() 
                +") " + color.getColor());
            Button.waitForAnyPress();
        }       
    }
}

score 1 · Accepted Answer · edited Feb 26 '11 at 21:42

Here is some working code:

ColorLightSensor cs = new ColorLightSensor(SensorPort.S1, SensorConstants.TYPE_LIGHT_ACTIVE);

for(int i = 0; i < 100 && !done; i++)
{
    cs.setFloodlight(lejos.robotics.Colors.Color.RED);

    sleep(1);

    LCD.clearDisplay();
    LCD.drawString("" + cs.getRedComponent(), 0,0);
    cs.setFloodlight(lejos.robotics.Colors.Color.GREEN);

    sleep(1);

    LCD.clearDisplay();
    LCD.drawString("" + cs.getGreenComponent(), 0,0);
    cs.setFloodlight(lejos.robotics.Colors.Color.BLUE);

    sleep(1);

    LCD.clearDisplay();
    LCD.drawString("" + cs.getBlueComponent(), 0,0);
}

Lejos RGB color sensor

2 Answers2