#include <DHT.h>

// Pin connections
#define DHTPIN 4
#define SERVO_PIN 18
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

// Servo positions
int closePos = 1638;   // Servo closed
int openPos  = 4915;   // Servo open

float limitTemp = 30.0;   // Temperature limit

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

  // Attach servo using ESP32 PWM
  ledcAttach(SERVO_PIN, 50, 16);

  // Servo start position
  ledcWrite(SERVO_PIN, closePos);

  Serial.println("Smart Agriculture Started");
}

void loop() {

  // Read DHT sensor
  float temp = dht.readTemperature();
  float hum  = dht.readHumidity();

  // Display values
  Serial.print("Temp: ");
  Serial.print(temp);
  Serial.println(" C");

  Serial.print("Humidity: ");
  Serial.print(hum);
  Serial.println(" %");

  // Servo control based on temperature
  if (temp > limitTemp) {
    ledcWrite(SERVO_PIN, openPos);
    Serial.println("Servo OPEN");
  } else {
    ledcWrite(SERVO_PIN, closePos);
    Serial.println("Servo CLOSED");
  }

  Serial.println("---------------");
  delay(2000);
}