#include <WiFi.h> // Thêm thư viện wifi
#include <HTTPClient.h>

WiFiClient client;
String thingsboardAddress = "http://demo.thingsboard.io:80";  // Replace with your ThingsBoard server address
String accessToken = "MZYqo7bsN4bG76hBFjUQ";  // Replace with your ThingsBoard device access token
String telemetryEndpoint = "/api/v1/" + accessToken + "/telemetry";

HTTPClient http;

void setup() {
  Serial.begin(115200);
  WiFi.disconnect();
  WiFi.begin("Wokwi-GUEST");  // Replace with your WiFi credentials

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }

  Serial.println("Connected to WiFi");
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    if (client.connect("demo.thingsboard.io", 80)) {  // Replace with your ThingsBoard server address
      float temperature = random(20, 25);
      float humidity = random(55, 70);
      float light = random(0, 1000);
      float ph = random(0, 14);
      
      String payload = "{\"temperature\":" + String(temperature) + ",\"humidity\":" + String(humidity) + ",\"light\":" + String(light) + ",\"ph\":" + String(ph)+"}";

      Serial.println("Sending data to ThingsBoard: " + payload);

      http.begin(thingsboardAddress + telemetryEndpoint);
      http.addHeader("Content-Type", "application/json");

      int httpCode = http.POST(payload);

      if (httpCode > 0) {
        String response = http.getString();
        Serial.println("Server response: " + response);
      } else {
        Serial.println("HTTP request failed");
      }

      http.end();

      delay(1000);
    }
  }
}