#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd1(0x27,16,2);
LiquidCrystal_I2C lcd2(0x27,16,2);

int LED1 = 8;
int LED2 = 7;
int LED3 = 6;
int LED4 = 5;

void setup()
{
  lcd1.init();
  lcd1.backlight();
  lcd2.init();
  lcd2.backlight();
  lcd1.setCursor(0,0);
  lcd1.print("hello everyone");
  lcd1.setCursor(0,1);
  lcd1.print("LCD 1");
  lcd2.setCursor(0,0);
  lcd2.print("hello everyone");
  lcd2.setCursor(0,1);
  lcd2.print("LCD 2");
  delay(2500);
  lcd1.clear();
  lcd2.clear();
  
  Serial.begin(9600);
  Serial.println("Masukkan Nilai LED:");
  Serial.println("(1 Ungu, 2 Biru, 3 Kuning, 4 Merah)");
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
}

void loop()
{
  if(Serial.available()>0){
    char ledPinState = Serial.read();
    if(ledPinState=='1'){
      Serial.println(ledPinState);
      Serial.println("Nilai : 49");
      int ungu = 49; 
      lcd1.clear();
      lcd1.setCursor(0,0);
      lcd1.print(ledPinState);
      lcd1.setCursor(0,1);
      lcd1.print(ungu);
      lcd2.clear();
      lcd2.setCursor(0,0);
      lcd2.print("Lampu 1");
      lcd2.setCursor(0,1);
      lcd2.print("ON :)");
     digitalWrite(LED1, HIGH);
  	 digitalWrite(LED2, LOW);
     digitalWrite(LED3, LOW);
  	 digitalWrite(LED4, LOW);
     delay(500);
     digitalWrite(LED1, LOW);
  	 digitalWrite(LED2, LOW);
     digitalWrite(LED3, LOW);
  	 digitalWrite(LED4, LOW);
      lcd2.clear();
      lcd2.setCursor(0,0);
      lcd2.print("Lampu 1");
      lcd2.setCursor(0,1);
      lcd2.print("OFF :(");
    }
  	else if(ledPinState=='2'){
      Serial.println(ledPinState);
      Serial.println("Nilai : 50");
      int biru = 50; 
      lcd1.clear();
      lcd1.setCursor(0,0);
      lcd1.print(ledPinState);
      lcd1.setCursor(0,1);
      lcd1.print(biru);
      lcd2.clear();
      lcd2.setCursor(0,0);
      lcd2.print("Lampu 2");
      lcd2.setCursor(0,1);
      lcd2.print("ON :)");
     digitalWrite(LED1, LOW);
  	 digitalWrite(LED2, HIGH);
     digitalWrite(LED3, LOW);
  	 digitalWrite(LED4, LOW);
     delay(500);
     digitalWrite(LED1, LOW);
  	 digitalWrite(LED2, LOW);
     digitalWrite(LED3, LOW);
  	 digitalWrite(LED4, LOW);
      lcd2.clear();
      lcd2.setCursor(0,0);
      lcd2.print("Lampu 2");
      lcd2.setCursor(0,1);
      lcd2.print("OFF :(");
    }   
    else if(ledPinState=='3'){
      Serial.println(ledPinState);
      Serial.println("Nilai : 51");
      int kuning = 51; 
      lcd1.clear();
      lcd1.setCursor(0,0);
      lcd1.print(ledPinState);
      lcd1.setCursor(0,1);
      lcd1.print(kuning);
      lcd2.clear();
      lcd2.setCursor(0,0);
      lcd2.print("Lampu 3");
      lcd2.setCursor(0,1);
      lcd2.print("ON :)");
     digitalWrite(LED1, LOW);
  	 digitalWrite(LED2, LOW);
     digitalWrite(LED3, HIGH);
  	 digitalWrite(LED4, LOW);
     delay(500);
     digitalWrite(LED1, LOW);
  	 digitalWrite(LED2, LOW);
     digitalWrite(LED3, LOW);
  	 digitalWrite(LED4, LOW);
      lcd2.clear();
      lcd2.setCursor(0,0);
      lcd2.print("Lampu 3");
      lcd2.setCursor(0,1);
      lcd2.print("ON :)");
    }
    else if(ledPinState=='4'){
      Serial.println(ledPinState);
      Serial.println("Nilai : 52");
      int merah = 52; 
      lcd1.clear();
      lcd1.setCursor(0,0);
      lcd1.print(ledPinState);
      lcd1.setCursor(0,1);
      lcd1.print(merah);
      lcd2.clear();
      lcd2.setCursor(0,0);
      lcd2.print("Lampu 4");
      lcd2.setCursor(0,1);
      lcd2.print("ON :)");
     digitalWrite(LED1, LOW);
  	 digitalWrite(LED2, LOW);
     digitalWrite(LED3, LOW);
  	 digitalWrite(LED4, HIGH);
     delay(500);
     digitalWrite(LED1, LOW);
  	 digitalWrite(LED2, LOW);
     digitalWrite(LED3, LOW);
  	 digitalWrite(LED4, LOW);
      lcd2.clear();
      lcd2.setCursor(0,0);
      lcd2.print("Lampu 4");
      lcd2.setCursor(0,1);
      lcd2.print("OFF :(");
    }
  }
}