/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
	}
}

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#include <ESP8266WiFi.h>
#include <DHT.h>

// WiFi & ThingSpeak Credentials
const char* ssid = "Your_WiFi_Name";  
const char* password = "Your_WiFi_Password";
const char* server = "api.thingspeak.com";
String apiKey = "Your_ThingSpeak_API_Key";

// DHT11 Sensor Settings
#define DHTPIN D4  // DHT11 connected to GPIO2
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

WiFiClient client;

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("\nConnected to WiFi");
  dht.begin();
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

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

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

  if (client.connect(server, 80)) {
    String url = "/update?api_key=" + apiKey +
                 "&field1=" + String(temperature) +
                 "&field2=" + String(humidity);
    
    client.print(String("GET ") + url + " HTTP/1.1\r\n" +
                 "Host: " + server + "\r\n" +
                 "Connection: close\r\n\r\n");
    client.stop();
  }
  delay(15000);  // Send data every 15 seconds
}