A web based connection monitor.
It includes a live HTTP ping graph and error counter.
You need a web server such as nginx for serving the page.
PHP is used for displaying the client IP, timestamp and for writing no-cache headers.
If you don't have PHP, please delete the PHP code (<?php ... ?>) at the beginning of index.php and change the file extension from php to html.
npm is used to install Javascript libraries (please see below).
Upload it to the www folder, then run the following to install javascript dependencies:
npm install