I am looking into a research project that aims to track social interactions at events (e.g., a music festival). My idea is that this could be accomplished using wristbands worn by the attendees that can identify (and log) when they have been tapped together.
My initial hypothesis is that this could be achieved using RFID tags and readers embedded in the wristband. Interactions could be stored onboard (with the wristbands collected afterwards), or transmitted to a hub via Wi-Fi/Bluetooth.
I would love to leverage the collective wisdom of this community - is this is a feasible approach, is there a better approach, and what hardware would you recommend?