/*

‍Voltaat learn (http://learn.voltaat.com)

Tutorial: Color Detection with Arduino!

Connections from the Arduino to the breadboard:

• Arduino 5v pin → breadboard 5v line

• Arduino GND pin → breadboard GND line

Connections from the color sensor:

• Positive pin of the color sensor → breadboard 5v line

• Negative pin of the color sensor → breadboard GND line

• S1 pin of the color sensor → Arduino pin 9

• S0 pin of the color sensor → Arduino pin 8

• OUT pin of the color sensor → Arduino pin 12

• S2 pin of the color sensor → Arduino pin 10

• S3 pin of the color sensor → Arduino pin 11

Connections from the RGB LED:

• Red led pin→220-ohm resistor→ Arduino pin 3

• Negative pin→ Breadboard ground line

• Green led pin→ 220-ohm resistor → Arduino pin 5

• Blue led pin→ 220-ohm resistor → Arduino pin 6

Connections from the LCD:

• I2C module GND pin → Breadboard GND line

• I2C module 5V pin → breadboard GND line

• I2C module SDA pin → Arduino pin A4

• I2C module SCL pin → Arduino pin A5

*/

#include <LiquidCrystal_I2C.h>

#include <tcs3200.h>

int red, green, blue, white;

tcs3200 tcs(8, 9, 10, 11, 12);  // (S0, S1, S2, S3, output pin)

// Define RGB LED pins

#define LED_R 3

#define LED_G 5

#define LED_B 6

LiquidCrystal_I2C lcd(0x27, 16, 2); // LCD I2C address may vary; adjust if needed

void setup() {

  // Initialize RGB LED pins as outputs

  pinMode(LED_R, OUTPUT);

  pinMode(LED_G, OUTPUT);

  pinMode(LED_B, OUTPUT);

  // Initialize LCD

  lcd.begin(16, 2);

  lcd.backlight(); // Turn on the LCD backlight

}

void loop() {

  // Read color values from the sensor

  red = tcs.colorRead('r');

  green = tcs.colorRead('g');

  blue = tcs.colorRead('b');

  white = tcs.colorRead('c'); // reads color value for white (clear)

  // Clear LCD for each loop iteration

  lcd.clear();

  // Check which color value is the largest and illuminate that color

  if (red > green && red > blue) {

    // Illuminate red

    analogWrite(LED_R, 255);

    analogWrite(LED_G, 0);

    analogWrite(LED_B, 0);

    // Display color on LCD

    lcd.setCursor(0, 0);

    lcd.print("Color: Red");

  } else if (green > red && green > blue) {

    // Illuminate green

    analogWrite(LED_R, 0);

    analogWrite(LED_G, 255);

    analogWrite(LED_B, 0);

    // Display color on LCD

    lcd.setCursor(0, 0);

    lcd.print("Color: Green");

  }

    else if (blue > red && blue > green) {

    // Illuminate blue

    analogWrite(LED_R, 0);

    analogWrite(LED_G, 0);

    analogWrite(LED_B, 255);

    // Display color on LCD

    lcd.setCursor(0, 0);

    lcd.print("Color: Blue");

  } else {

    // If colors are close or undefined, turn off all LEDs

    analogWrite(LED_R, 0);

    analogWrite(LED_G, 0);

    analogWrite(LED_B, 0);

    // Display mixed color on LCD

    lcd.setCursor(0, 0);

    lcd.print("Color: Mixed");

  }

  delay(200); // Delay to avoid rapid updates

}

‍