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

#define DHTPIN 15
#define DHTTYPE DHT22
#define SOIL_MOISTURE_PIN 34
#define RELAY_PIN 2

const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";
const char* serverName = "your-server-address";

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  dht.begin();
  
  pinMode(SOIL_MOISTURE_PIN, INPUT);
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW);
  
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
}

void loop() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  int soilMoistureValue = analogRead(SOIL_MOISTURE_PIN);

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

  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.print("%  Temperature: ");
  Serial.print(temperature);
  Serial.print("°C  Soil Moisture: ");
  Serial.println(soilMoistureValue);

  // Decision to water the plants
  if (soilMoistureValue < 500) { // Adjust threshold as needed
    digitalWrite(RELAY_PIN, HIGH);
    Serial.println("Watering the plants...");
  } else {
    digitalWrite(RELAY_PIN, LOW);
    Serial.println("Soil moisture is sufficient, not watering.");
  }

  // Sending data to the server
  if (WiFi.status() == WL_CONNECTED) {
    WiFiClient client;
    const int httpPort = 80;
    if (!client.connect(serverName, httpPort)) {
      Serial.println("Connection to server failed");
      return;
    }

    String url = "/update";
    String data = "api_key=YOUR_API_KEY&temperature=" + String(temperature) + "&humidity=" + String(humidity) + "&soil_moisture=" + String(soilMoistureValue);

    client.print(String("POST ") + url + " HTTP/1.1\r\n" +
                 "Host: " + serverName + "\r\n" +
                 "Content-Type: application/x-www-form-urlencoded\r\n" +
                 "Content-Length: " + data.length() + "\r\n" +
                 "\r\n" +
                 data);

    unsigned long timeout = millis();
    while (client.available() == 0) {
      if (millis() - timeout > 5000) {
        Serial.println(">>> Client Timeout !");
        client.stop();
        return;
      }
    }

    while (client.available()) {
      String line = client.readStringUntil('\r');
      Serial.print(line);
    }

    client.stop();
  } else {
    Serial.println("WiFi Disconnected");
  }

  delay(60000); // Delay for 1 minute before next reading
}