Ask HN: Ideas for high speed one-to-many communication between smartphones

  • One could possibly expose a wifi network who's SSID will act as a boarding id. So a driver's phone only needs to scan for wifi networks frequently enough, and when it recognizes one that can be a boarding id, connect to that network and supply a password which can be interpreted as a success reply? Connection may fail then, it's ok - all that's needed is knowing a SSID and trying to connect, thus supplying a password.

    Idk how difficult it is for the mobile apps to create wifi hotspots from phones, but should be doable.

  • Already solved with QR codes