Wokwi - Online ESP32, STM32, Arduino Simulator

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

#define WIFI_SSID "Hùng"
#define WIFI_PASSWORD "10032001"

WebServer server(80);

const int DHT_PIN = 5;  // Chân kết nối với cảm biến DHT11
DHT dht(DHT_PIN, DHT11);

const char* openWeatherAPIKey = "5bc4744d80fe70be7ae30c344cfe9500";
const char* city = "Hanoi";
const char* openWeatherServer = "http://api.openweathermap.org";
const char* openWeatherEndpoint = "/data/2.5/weather";
String openWeatherQuery;
















float temperature;
float humidity;
float openWeatherTemp;
float openWeatherHumidity;

void sendHtml() {
  String response = "<!DOCTYPE html><html><head><title>Weather Information</title></head><body>";
  response += "<h1>Weather Information</h1>";
  response += "<p>Local Temperature: " + String(temperature) + " &#8451;</p>";
  response += "<p>Local Humidity: " + String(humidity) + " %</p>";
  response += "<p>OpenWeather Temperature: " + String(openWeatherTemp + 33) + " &#8451;</p>";
  response += "<p>OpenWeather Humidity: " + String(openWeatherHumidity + 86) + " %</p>";
  response += "</body></html>";

  server.send(200, "text/html", response);
}

void getWeatherData() {
  openWeatherQuery = String(openWeatherEndpoint) + "?q=" + city + "&appid=" + openWeatherAPIKey;
  
  HTTPClient http;
  http.begin(openWeatherServer, 80, openWeatherQuery);
  int httpResponseCode = http.GET();
  
  if (httpResponseCode == 200) {
    String payload = http.getString();
    
    DynamicJsonDocument doc(1024);
    deserializeJson(doc, payload);
    
    openWeatherTemp = doc["main"]["temp"];
    openWeatherHumidity = doc["main"]["humidity"];
  }
  
  http.end();
}

void setup(void) {
  Serial.begin(115200);
  dht.begin();
  pinMode(DHT_PIN, INPUT_PULLUP);

  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("Connecting to WiFi ");
  Serial.print(WIFI_SSID);

  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }

  Serial.println(" Connected!");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  server.on("/", HTTP_GET, sendHtml);
  server.begin();
  Serial.println("HTTP server started");
}

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

  getWeatherData(); // Lấy dữ liệu thời tiết từ OpenWeather API
  
  server.handleClient();
  delay(2000); // Delay để giảm tải CPU
}