<!DOCTYPE html> <!-- This Source Code Form is subject to the terms of the Mozilla Public - License, v. 2.0. If a copy of the MPL was not distributed with this - file, You can obtain one at https://mozilla.org/MPL/2.0/. --> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>iot-contact</title> <script type="text/javascript" src="/iot-contact.js"></script> </head> <body> <h4>iot-contact</h4> <p> <label for="heartbeat">Heartbeat</label> <meter id="heartbeat" min="0" max="1" value="0"></meter> </p> </body> </html>