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

#define DHTPIN 4 // GPIO pin for DHT11
#define DHTTYPE DHT11 // DHT11 sensor

DHT dht(DHTPIN, DHTTYPE);

// Replace with your WiFi credentials

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

// Replace with your ThingSpeak API key

String apiKey = "1D7BB11DLXH4UQ3Z";
String server = "https://api.thingspeak.com";

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

 // Connect to Wi-Fi
 WiFi.begin(ssid, password);
 Serial.print("Connecting to WiFi");
 while (WiFi.status() != WL_CONNECTED) {
 delay(1000);
 Serial.print(".");
 }
 Serial.println("\nWiFi connected");
}

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.println(" °C");
 Serial.print("Humidity: ");
 Serial.print(humidity);
 Serial.println(" %");
 if (WiFi.status() == WL_CONNECTED) {
 HTTPClient http;
 String url = server + "/update?api_key=" + apiKey +
 "&field1=" + String(temperature) +
 "&field2=" + String(humidity);
 http.begin(url);
 int httpCode = http.GET();
 if (httpCode > 0) {
 Serial.println("Data sent to ThingSpeak");
 } else {
 Serial.println("Error sending data");
 }
 http.end();
 }
 delay(20000); // Wait 20 seconds before sending the next data
}