Coincidentally, I just noticed a limited sale of the Kiwi3 ODB2 Bluetooth dongle thingy. If you have an odb2 port, this thing will hook up with your Harry LapTimer app and provide heaps more cool racing info like revs, gear, economy (hah!), etc that maps into your lap data. And this price is pretty good.
https://www.massdrop.com/buy/kiwi-3-...referer=YB6RD3