Your Dragy times every lap and sends it to your team's pit wall. Get it ready here, then go to the wheel.
Chrome on Android. Turn the Dragy on first. Indoors it connects, but it needs the open sky to find satellites. Test page
Use the code and PIN from your team's pit wall. Without one, it just times your laps.
Waiting for a GPS position.
At a track in the track library, the line sets itself. Anywhere else, drive (or push the kart) over the line and tap Set the line here as you cross it.