Most of the escape room masters usually accompany their customers to the room, to tell the story and inform about the procedure. Then they should run fast back to their control room to activate the countdown timer. Forget this procedure. Remotely activate the countdown timer directly from your mobile phone.
Go on settings-> Connections and enable the “Incoming HTTP Requests”
Point your mobile browser on the given “Remotely Stat” URL. Please make sure that both, your mobile device and Houdini MC are connected on the same network/