#include <DHT.h>
#include <WiFi.h>
#

#define DHTPIN 2         // Pin where the DHT sensor is connected
#define DHTTYPE DHT22    // DHT 22 (AM2302)
#define Relay 3          // Pin for the relay
#define Buzzer 4         // Pin for the buzzer

DHT dht(DHTPIN, DHTTYPE);

// Wi-Fi credentials
const char* ssid = "your_SSID";         // Ganti dengan nama SSID Wi-Fi Anda
const char* password = "your_PASSWORD"; // Ganti dengan password Wi-Fi Anda

void setup() {
  Serial.begin(115200);
  Serial.println(F("DHT-On test"));
  
  dht.begin();
  
  pinMode(Relay, OUTPUT);  // Set relay pin as output
  pinMode(Buzzer, OUTPUT); // Set buzzer pin as output
  
  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
}

void loop() {
  delay(2000); // Wait for sensor to stabilize

  // Read humidity and temperature
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  float fahrenheit = dht.readTemperature(true);

  // Check if readings failed
  if (isnan(humidity) || isnan(temperature) || isnan(fahrenheit)) {
    Serial.println(F("Failed to read from DHT sensor"));
    return;
  }

  // Print humidity and temperature to Serial Monitor
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.print("%  Temperature: ");
  Serial.print(temperature);
  Serial.print("°C  ");
  Serial.print(fahrenheit);
  Serial.println("°F");

  // Send data to PHP script
  sendDataToPHP(humidity, temperature, fahrenheit);

  // Control relay and buzzer based on temperature
  if (temperature > 30.0) {
    digitalWrite(Relay, HIGH);  // Turn on relay
    digitalWrite(Buzzer, HIGH); // Turn on buzzer
  } else if (temperature < 25.0) {
    digitalWrite(Relay, LOW);   // Turn off relay
    digitalWrite(Buzzer, LOW);  // Turn off buzzer
  }

  delay(1000); // Delay before next loop
}

// Function to send data to PHP script
void sendDataToPHP(float humidity, float temperature, float fahrenheit) {
  HTTPClient http;
  
  String url = "http://localhost/dht/save_data.php";  // Ganti dengan path PHP Anda
  http.begin(url); // Specify the URL
  
  // Specify content type and HTTP method
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");

  // Create POST data
  String postData = "humidity=" + String(humidity) + "&temperature_celsius=" + String(temperature) + "&temperature_fahrenheit=" + String(fahrenheit);
  
  // Send HTTP POST request
  int httpResponseCode = http.POST(postData);

  if (httpResponseCode > 0) {
    Serial.println("Data sent successfully");
  } else {
    Serial.println("Error in sending data");
  }

  http.end();  // Close connection
}