Working with Color Sensor V3

Technical Programming
1

I am trying to code the Color Sensor V3 by Rev Robotics in java. I am using the exact same code from this github except I changed my color values a bit. The issue is that the color sensor is not reading perfect values. For each color, I am getting around .5 with or without the modified code. It does change from color to color so the sensor is working.

private final Color kBlueTarget = ColorMatch.makeColor(0.142, 0.437, 0.421);
private final Color kGreenTarget = ColorMatch.makeColor(0.177, 0.577, 0.253);
private final Color kRedTarget = ColorMatch.makeColor(0.482, 0.369, 0.149);
private final Color kYellowTarget = ColorMatch.makeColor(0.314, 0.552, 0.134);

What should these values be? I tried setting them to the color value that the sensor was reading without any modifications and this still doesn’t seem to help the sensor.

2

Have you tried using the colorMatcher. This should fix the slight imbalances that the color sensor should give

3

Yes. I have a function that .addsColorMatch(kColor) to colorMatcher

4

Have you tried it with / without the LED?

5

Try a method that just prints out what the colorSensor sees and then add sys.outs to see how far your code gets. I.e. debug it

6

What’s the distance between the sensor to the color you’re reading? The sensor’s datasheet says that “Color data is best collected within 2cm of the target for
the strongest color differentiation”.

7

Yes

8

Anywhere from 1 inch to right up on it

9

The color value itself is a bunch of numbers and strings combined. When I get the value of getColor().red, I typically get anywhere from .1 to .6 depending on the color.

10

Very helpfull.

1 Like
11

I had to rewrite the code from the website into my program and with a bit of adjustments, I was able to get our color sensor working. I must’ve added or deleted something when I wrote my code the first time.

12

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