testx.ino

void callRestAPI(String jsonString, String host, String url, String key) {
  WiFiClientSecure client;
  DynamicJsonBuffer jsonBuffer;
  Serial.print("Requesting URL: ");
  Serial.println(" ");
  if (client.connect(Host, 443)) {      //443
    Serial.println("Connected");
    client.println("POST " + url + key + " HTTP/1.1");
    client.println("Host: " + (String)Host);
    client.println("Connection: close");
    client.println("Content-Type: application/json");
    client.println("User-Agent: Arduino/1.0");
    client.print("Content-Length: ");
    client.println(jsonString.length());
    client.println();
    client.print(jsonString);
    delay(500);
  }
  //Read and parse all the lines of the reply from server
  while (client.available()) {
    String line = client.readStringUntil('\r');
    Serial.print(line);
    JsonObject& root = jsonBuffer.parseObject(line);
    if (root.success()) {
      latitude    = root["location"]["lat"];
      longitude   = root["location"]["lng"];
      accuracy   = root["accuracy"];
    }
  }
  Serial.println("closing connection");
  Serial.println();
  client.stop();
}