How to find out the speed of rotation of the wheel on the exercise bike?

Question

C++ / C#

The task is to connect an ordinary exercise bike (it does not yet have electronics on board) with Unity in order to ride in VR.
Where to dig?

Answer 1

You need to dig in the direction of standards, and not engage in bicycle building)
tyts and tyts

Answer 2

How to find out the speed of rotation of the wheel on the exercise bike?

Much more expensive in terms of resources.
Take photos of the pedals with a webcam, recognize the position and calculate the angular velocity (from the time between the photos).

Answer 3

The most primitive option, which is used on all bike computers of the middle and lower price ranges, is a wheel magnet and a reed sensor on the frame.
The price of the issue is a dollar, the arduino is another two dollars.

Answer 4

Arduino (I recommend esp32)
Hall sensor

Answer 5

Take the "speaker" from the bike, put it on the wheel and relieve tension.
Well, then - a matter of technology. Sampler -> port -> software.