#include <LiquidCrystal_I2C.h> // LCD librairy.h>


LiquidCrystal_I2C lcd(0x27,16,2);    // set the LCD address to 0x27 for a 16 chars and 2 line display
#define RELAYPIN 4  // The pin at which we want to connect the relay

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  lcd.init();                     // Initialize the LCD
  lcd.backlight();                // Turn On the back light of the LCD
  lcd.clear();                   // Clear everything form the display
  lcd.print("Relay started");
  lcd.setCursor(0, 1); 
  lcd.print("With Bluetooth!");
  pinMode(RELAYPIN, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(RELAYPIN, HIGH);
  if(digitalRead(RELAYPIN)==1){ Serial.println("ON");}
  delay(1000); // this speeds up the simulation
  digitalWrite(RELAYPIN, LOW);
  if(digitalRead(RELAYPIN)==0){ Serial.println("OFF");}
  delay(1000);
}