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

#define DHTPIN 5
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

const char* ssid = "Wokwi-GUEST";
const char* password = "";     

unsigned long channelID = 3063386;
const char* writeAPIKey = "NWUKYG9KIX67M6EB";

WiFiClient client;

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

  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi Connected.");

  // Initialize ThingSpeak
  ThingSpeak.begin(client);
}

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(" %");

  ThingSpeak.setField(1, temperature);
  ThingSpeak.setField(2, humidity);

  int statusCode = ThingSpeak.writeFields(channelID, writeAPIKey);

  if (statusCode == 200) {
    Serial.println("Data sent to ThingSpeak successfully.");
  } else {
    Serial.print("Error sending data. HTTP error code: ");
    Serial.println(statusCode);
  }

  delay(15000); // ThingSpeak minimum update time = 15 seconds
}