#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,4); 

int PinR = 14;
int PinY = 15;
int PinG = 16;
String data;

void setup() {
  Serial.begin(9600);
  pinMode(PinR, OUTPUT);
  pinMode(PinY, OUTPUT);
  pinMode(PinG, OUTPUT);
  digitalWrite(PinR, LOW);
  digitalWrite(PinY, LOW);
  digitalWrite(PinG, LOW);

  lcd.init();                      // initialize the lcd 
  lcd.backlight();
  
  delay(500);
}
void loop() {
  while (Serial.available() > 0) {
    delay(100);
    char data = Serial.read();
    //   data+=c;
    Serial.println(data);
    if (data == '1') {
      digitalWrite(PinR, HIGH);
      lcd.setCursor(3,0);
  lcd.print("Lamp R: ON ");
    }
    else if (data == '2') {
      digitalWrite(PinR, LOW);
          lcd.setCursor(3,0);
  lcd.print("Lamp R: OFF");
    }
    else if (data == '3') {
      digitalWrite(PinY, HIGH);
          lcd.setCursor(3,0);
  lcd.print("Lamp Y: ON ");
    }
    else if (data == '4') {
      digitalWrite(PinY, LOW);
          lcd.setCursor(3,0);
  lcd.print("Lamp Y: OFF");
    }
    else if (data == '5') {
      digitalWrite(PinG, HIGH);
          lcd.setCursor(3,0);
  lcd.print("Lamp G: ON ");
    }
    else if (data == '6') {
      digitalWrite(PinG, LOW);
          lcd.setCursor(3,0);
  lcd.print("Lamp G: OFF");

    }
  }
}