#include <LCD_I2C.h>
LCD_I2C lcd(0x27, 16, 2);
void setup() {
  lcd.begin();
  lcd.backlight();
  pinMode(2, INPUT_PULLUP);
  pinMode(4, INPUT_PULLUP);
  pinMode(5, INPUT_PULLUP);
  pinMode(16, HIGH);
  pinMode(17, HIGH);
}

void loop() {
  if (digitalRead(2)==0){
    lcd.clear();
    digitalWrite(16, LOW);
    digitalWrite(17, HIGH);
    lcd.setCursor(0,0);
    lcd.print("Relay 1 ON");
  }
  if (digitalRead(4)==0){
    lcd.clear();
    digitalWrite(16, HIGH);
    digitalWrite(17, LOW);
    lcd.setCursor(0,1);
    lcd.print("Relay 2 ON");
  }
  if (digitalRead(5)==0){
    lcd.clear();
    digitalWrite(16, LOW);
    digitalWrite(17, LOW);
    lcd.setCursor(0,0);
    lcd.print("Relay 1 & 2 OFF");
  }

}
NOCOMNCVCCGNDINLED1PWRRelay Module
NOCOMNCVCCGNDINLED1PWRRelay Module