#include <DHT.h>

#define PIR_PIN 23
#define LDR_PIN 34
#define DHT_PIN 4
#define DHTTYPE DHT22

#define UV_RELAY 25
#define ULTRASONIC_RELAY 26

DHT dht(DHT_PIN, DHTTYPE);

void setup() {
  Serial.begin(115200);

  pinMode(PIR_PIN, INPUT);
  pinMode(UV_RELAY, OUTPUT);
  pinMode(ULTRASONIC_RELAY, OUTPUT);

  digitalWrite(UV_RELAY, LOW);
  digitalWrite(ULTRASONIC_RELAY, LOW);

  dht.begin();
}

void loop() {
  int pirState = digitalRead(PIR_PIN);
  int ldrValue = analogRead(LDR_PIN);
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  Serial.print("PIR: ");
  Serial.print(pirState);
  Serial.print(" | LDR: ");
  Serial.print(ldrValue);
  Serial.print(" | Temp: ");
  Serial.print(t);
  Serial.print(" °C | Humidity: ");
  Serial.println(h);

  // Example logic: turn on UV lamp if night (low LDR)
  if (ldrValue < 2000) {
    digitalWrite(UV_RELAY, HIGH);
  } else {
    digitalWrite(UV_RELAY, LOW);
  }

  // Example logic: turn on Ultrasonic if PIR detects motion
  if (pirState == HIGH) {
    digitalWrite(ULTRASONIC_RELAY, HIGH);
  } else {
    digitalWrite(ULTRASONIC_RELAY, LOW);
  }

  delay(2000);
}