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==== Thread ====

<code c>
#include <WiFi.h>
#include <WebServer.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>
#include <Thread.h>

const char *ssid = ".....";
const char *password = ".....";

float btc;

Thread myThread = Thread();

void getBtcFromKraken() {

  HTTPClient http;
  
  http.begin("https://api.kraken.com/0/public/Ticker?pair=XXBTZEUR");

  int httpCode = http.GET();
  
  if (httpCode == HTTP_CODE_OK) {
    String response = http.getString();

    JsonDocument doc;
    DeserializationError error = deserializeJson(doc, response);
    if (!error) {
      btc = doc["result"]["XXBTZEUR"]["c"][0].as<float>();
      Serial.print("BTC: ");
      Serial.println(btc);
    }
    
  }

  http.end();
}


WebServer server(80);



void handleRoot() {
  String html = "BTC = " + String(btc);
  server.send(200, "text/plain", html);
}

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

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) delay(500);

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

  //if (MDNS.begin("esp32")) {
  //  Serial.println("MDNS responder started");
  //}


  myThread.onRun(getBtcFromKraken);
  myThread.setInterval(10000);
  myThread.run();

  server.on("/", handleRoot);

  server.onNotFound([]() {
    server.send(404, "text/plain", "Not Found");
  });

  server.begin();
  Serial.println("HTTP server started");
}

void loop(void) {
  if (myThread.shouldRun()) myThread.run();
  Serial.print(".");
  server.handleClient();
  delay(500);  //allow the cpu to switch to other tasks
}

</code>