String esp32get() {
  HTTPClient http;
  String response;
  String urlstr="http://jyan.nobiggie.cn/query/version?version=123456";
  http.begin(wificlient, urlstr);
  http.setTimeout(3000);
  int httpCode = http.GET();
  // httpCode will be negative on error
  if (httpCode == 200) {
    response = http.getString();
    return response;
  } else {
    return "";
  }
  http.end();
}
String esp32post() {
  HTTPClient http;
  String url = "http://jyan.nobiggie.cn/query/version";  // 替换为你的POST接口地址
  http.begin(wificlient, url);
  http.setTimeout(3000);
  String postStr = "version=esp32test10";
  char dataBuff[postStr.length()];
  strcpy(dataBuff, postStr.c_str());
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");
  int httpResponseCode = http.POST(dataBuff);
  if (httpResponseCode > 0) {
    String response = http.getString();
    return response;
  }
  return "";
}