From entering and leaving the system, that is, access control, to punching in and signing in for class, and then to the locker, it has been realized.
The bracelet is the most popular on the market now, which is too complicated. What we use here is the overall scheme of Qin bird finger pulse.
Because our locker is in the bathroom, we can't do face recognition, but we can't do a whole set of fingerprints. Members' fingers are wrinkled after taking a shower, so they can't use them. But finger veins don't seem to have this problem, at least we haven't encountered it yet
You can also try to solve the whole finger vein.