#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

String data_serial_receive;

const int relay = 13;

void setup() {

Serial.begin(57600);

pinMode(relay, OUTPUT);

digitalWrite(relay, HIGH);

lcd.init();

lcd.backlight();

lcd.setCursor(0, 0);

lcd.print("Face Recognition");

lcd.setCursor(5, 1);

lcd.print("System");

delay(2000);

}

void loop() {

if (Serial.available() > 0) {

data_serial_receive = Serial.readStringUntil('\n');

if(data_serial_receive == "1") {

digitalWrite(relay, LOW);

lcd.clear();

lcd.setCursor(1, 0);

lcd.print("WAJAH DIKENALI");

lcd.setCursor(1, 1);

lcd.print("Silahkan Masuk");

delay(100);

}

if(data_serial_receive == "0") {

digitalWrite(relay, HIGH);

lcd.clear();

lcd.setCursor(0, 0);

lcd.print("Memindai Wajah..");

lcd.setCursor(0, 1);

lcd.print("Hadap ke kamera");

delay(100);

}

}

}