// Load Wi-Fi library
#include <WiFi.h>
#include <HTTPClient.h>

const char* WIFI_SSID = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";

const int LM35Pin = 34;



void setup() {
  Serial.begin(115200);
  Serial.print("Connecting to ");
  Serial.println(WIFI_SSID);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  // Print local IP address
  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  
}

void sendDataToThingsBoard(String device, String value) {
  HTTPClient http;
  String url = "http://thingsboard.cloud/api/v1/slFmIBsxbfLHcIzOeUxH/telemetry";
  String payload = "{"+device+":" + value + "}";

  http.begin(url);
  http.addHeader("Content-Type", "application/json");

  int httpResponseCode = http.POST(payload);

  if (httpResponseCode > 0) {
    Serial.println("Data sent to ThingsBoard successfully");
  } else {
    Serial.println("Error sending data to ThingsBoard");
  }

  http.end();
}


void loop(){

    int sensorValue = analogRead(LM35Pin);
    float temperatureC = (sensorValue / 4095.0) * 330.0;

   Serial.println("Temperature : "+String(temperatureC)+"°C"); 
  // Send data to IOT Website
  sendDataToThingsBoard("Temperature",String(temperatureC));
  
	
  delay(2000);
}