/* Hello Wokwi! */

#include <LiquidCrystal_I2C.h>
#define LDR_PIN 2

//Seting LDR
const float GAMMA = 0.7;
const float RL10 = 50;

LiquidCrystal_I2C lcd(0x27, 20, 4);

int ledPin = 2;
int inputPin = 3;
int pirState = LOW;
int val = 0;

void setup() {
  pinMode(inputPin, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(LDR_PIN, INPUT);

  Serial.begin(115200);

  //Inisiasi
  lcd.init();
  lcd.backlight();
}

void loop() {
  //LDR
int analogValue = analogRead(A0);
float voltage = analogValue / 1024. * 5;
float resistance = 2000 * voltage / (1 - voltage / 5);
float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

//PIR
val = digitalRead(inputPin);  // baca input
  if (val == HIGH) {            // Periksa jika input HIGH
    digitalWrite(ledPin, HIGH);  // Menyalakan LED
    if (pirState == LOW && lux < 50) {
      // PIR MENYALA
      Serial.println("Terdeteksi! Cahaya Gelap");
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("GERAKAN : ADA!");
      lcd.setCursor(0, 1);
      lcd.print("CAHAYA: GELAP");
      pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, LOW); // Mematikan LED
    if (pirState == HIGH) {
      // PIR MATI
      Serial.println("Tidak Terdeteksi! Cahaya Gelap");
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("GERAKAN : TIDAK!");
      lcd.setCursor(0, 1);
      lcd.print("CAHAYA: GELAP");
      pirState = LOW;
    }
  }
    if(lux > 50){
      digitalWrite(ledPin, LOW); // Mematikan LED
      Serial.println("Tidak Terdeteksi! Cahaya Terang");
      
      lcd.setCursor(0, 0);
      lcd.print("GERAKAN : TIDAK!");
      lcd.setCursor(0, 1);
      lcd.print("CAHAYA: TERANG");
      pirState = LOW;
    }
    
  }