#include <DHT.h>
#include <ESP32Servo.h>

#define DHTPIN 4       // DHT22 sensor connected to ESP32 GPIO4
#define DHTTYPE DHT22  // DHT sensor type
#define LDR_PIN 34     // LDR sensor connected to analog pin 34
#define LED_PIN 5      // LED as streetlight on GPIO5
#define RELAY_PIN 18   // Relay module for fan on GPIO18
#define SERVO_PIN 19   // Servo motor for fan on GPIO19

DHT dht(DHTPIN, DHTTYPE);
Servo fan;  // Servo as a fan

void setup() {
    Serial.begin(115200);
    dht.begin();
    pinMode(LED_PIN, OUTPUT);
    pinMode(RELAY_PIN, OUTPUT);
    fan.attach(SERVO_PIN);
    fan.write(0); // Start fan in OFF position
}

void loop() {
    float temperature = dht.readTemperature();
    int ldrValue = analogRead(LDR_PIN);

    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.print("°C | LDR Value: ");
    Serial.println(ldrValue);

    // Automatic Street Light Logic
    if (ldrValue > 2000) {  // Adjust this threshold as per light conditions
        digitalWrite(LED_PIN, HIGH); // Turn ON light in darkness
    } else {
        digitalWrite(LED_PIN, LOW);  // Turn OFF light in daylight
    }

    // Smart Air Conditioning Logic
    if (temperature > 30) {
        digitalWrite(RELAY_PIN, HIGH);  // Turn ON fan
        fan.write(90);  // Rotate fan (servo position)
    } else {
        digitalWrite(RELAY_PIN, LOW);  // Turn OFF fan
        fan.write(0);  // Stop fan
    }

    delay(2000); // Delay to avoid excessive sensor reads
}