https://dzone.com/articles/virtually-cycling-the-alps-with-a...
I ended up using the ant+ dongle and connected straight to my laptop. Using the GPL code from GoldenCheetah for the handshakes -
https://code.google.com/archive/p/routeviewer-antplus-bike-c...
It was a nice project but refresh rates were too slow - i should have built trainerroad!
I keep thinking about doing the same with rasp pi and retropi, then use hr, or speed to control a game. but dont have time at the moment