How to use it? 1. Prepare a computer and another device (mobile ok) and both of them are logged into an old scratch account 2. Select the host(2) on the computer, and press the space bar to restore the variables. 3. On another device, select a client(0) 4. Go back to the computer, press "start test", and do not press any key until ping is shown on the host site. 5. Look and get the ping value on the host site, not the client side as it's empty!
ping: milliseconds (ms) at least it works
