RGB/ FSR pressure sensor, code not doing what it says.

Other Hardware Sensors
2 
  if (bluVal == 255) {            // if blue is at maximum, continue to light it up
    analogWrite(bluPin, bluVal);
  } else {                    // else fade in the blue color
    bluVal ++;
    analogWrite(bluPin, bluVal);
  }

can be shorter ==>

  if (bluVal < 255) bluVal ++;
  analogWrite(bluPin, bluVal);
  }

also other colors :slight_smile:

I would rethink the code,

you have 3 leds that should overlap

RED [0..512] => 0..255..0
GREEN [256-768] ==> 0..255..0
BLUE [512-768] ==> 0..255

That would give something like the following code - give it a try

//Setup all pins
int sensPin = 2;    // set the touch sensor (analog) input pin on Arduino
int redPin = 3;    // set the PWM (analog) output pin on Arduino controlling the red anode
int grnPin = 5;        // set the PWM (analog) output pin on Arduino controlling the green anode
int bluPin = 6;    // set the PWM (analog) output pin on Arduino controlling the blue anode

//Initialize variables
int redVal;         // pulse width variable for red anode
int grnVal;         // pulse width variable for green anode
int bluVal;         // pulse width variable for blue anode

void setup() 
{
  pinMode(redPin, OUTPUT);   // set the LED pins as output
  pinMode(grnPin, OUTPUT);
  pinMode(bluPin, OUTPUT);
  Serial.begin(9600);
}

void loop() 
{
  int val = analogRead(sensPin);           // read touch sensor values

  if (val < 256)
  {
    redVal = val;
	greenVal = 0;
	blueVal = 0;
  }
  else if (val < 512)
  {
    redVal = 512 - val;
	greenVal = val-256;
	blueVal = 0;
  }
  else if (val < 768)
  {
    redVal = 0;
	greenVal = 768-val;
	blueVal = val-512;
  }
  else
  {
    redVal = 1023-val;
	greenVal = 1023-val;
	blueVal = 255;
  }
  display(redVal, greenVal, blueVal);
}

void display(int r, int g, int b) 
{
  analogWrite(redPin, r);
  analogWrite(grnPin, g);
  analogWrite(bluPin, b);
}