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

#define DHTPIN 4      // GPIO pin connected to the DHT11
#define DHTTYPE DHT11 // DHT 11

const char* ssid = "YOUR_SSID";
const char* password = "YOUR_PASSWORD";
const char* writeAPIKey = "YOUR_WRITE_API_KEY";

DHT dht(DHTPIN, DHTTYPE);
WiFiClient client;

unsigned long myChannelNumber = YOUR_CHANNEL_NUMBER;

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  
  Serial.println("Connected to WiFi");
  ThingSpeak.begin(client);
  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 ");
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  // Write to ThingSpeak
  ThingSpeak.setField(1, temperature);
  ThingSpeak.setField(2, humidity);

  int response = ThingSpeak.writeFields(myChannelNumber, writeAPIKey);
  
  if (response == 200) {
    Serial.println("Data sent to ThingSpeak successfully");
  } else {
    Serial.println("Failed to send data to ThingSpeak");
  }

  delay(20000); // Wait 20 seconds to avoid hitting ThingSpeak rate limits
}