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

// Replace these with your network credentials
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

// Replace this with the URL of your Flask server
const char* serverUrl = "192.168.1.15:5000/sensor-data";

// Define sensor pins
#define DHTPIN 4      // DHT11 data pin
#define MQ135PIN 34   // MQ-135 analog pin
#define MQ7PIN 35     // MQ-7 analog pin
#define SOILPIN 32    // Soil moisture analog pin

// DHT11 sensor setup
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

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

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    
    // Reading sensor values
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature();
    int soilMoisture = analogRead(SOILPIN);
    int mq135 = analogRead(MQ135PIN);
    int mq7 = analogRead(MQ7PIN);

    if (isnan(humidity) || isnan(temperature)) {
      Serial.println("Failed to read from DHT sensor!");
      return;
    }

    // Preparing the data to send
    String postData = "humidity=" + String(humidity) +
                      "&temperature=" + String(temperature) +
                      "&soilMoisture=" + String(soilMoisture) +
                      "&mq135=" + String(mq135) +
                      "&mq7=" + String(mq7);

    http.begin(serverUrl);
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");

    // Sending the data via POST
    int httpResponseCode = http.POST(postData);

    if (httpResponseCode > 0) {
      String response = http.getString();
      Serial.println(httpResponseCode);
      Serial.println(response);
    } else {
      Serial.print("Error on sending POST: ");
      Serial.println(httpResponseCode);
    }

    http.end();
  }

  // Wait before next reading
  delay(60000);  // 1 minute interval
}