Barcode input to knack

Hello All,

I want to build an application that does the following function.

Each person entering my office will be given a barcoded wristband at the front office. This wristband would be tagged to the demographics of each individual. Now, as the individual moves from one stall to another, his/her barcode would be scanned. This is to know 2 main things,

1. That the individual have been to that stall and

2. The time the individual spent at that stall

As the person is scanned each time, I want it to populate the stall location and time within knack DB.

How do I manage to do this in knack?

any help is appreciated. Thank you