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1. Bernie (codewiz@mstdn.io)'s status on Sunday, 18-Jun-2023 01:37:02 UTC Bernie

   Uniqlo has a magical self-checkout system where you simply put the shopping basket full of clothes into a cradle, and it will instantly scan all the items. It detects multiple instances of the same SKU.

   Of course there are NFC antennas hidden in the tag, but how do they communicate all at once without interfering? 🤔

   • Soh Kam Yung (sohkamyung@mstdn.io)'s status on Sunday, 18-Jun-2023 02:25:05 UTC Soh Kam Yung

     in reply to

     @codewiz I'm not certain how Uniqlo does it, but in Singapore, the local library system uses large NFC based open gantries at its entrances. These can automatically detect library books passing through them and sound an alert if it detects library books that have not been borrowed.

     Possible Uniqlo has a similar, or more advanced system.

   • Bernie (codewiz@mstdn.io)'s status on Sunday, 18-Jun-2023 04:19:48 UTC Bernie

     in reply to

     • Soh Kam Yung

     @sohkamyung I'll keep one of those Uniqlo tags in my wallet to check if it triggers an alarm anywhere else 😄

   • Tagomago (tagomago@mastodon.social)'s status on Sunday, 18-Jun-2023 08:59:41 UTC Tagomago

     in reply to

     @codewiz Maybe they have unique IDs in their signal? 🤔🤔

   • Bernie (codewiz@mstdn.io)'s status on Sunday, 18-Jun-2023 08:59:41 UTC Bernie

     in reply to

     • Tagomago

     @tagomago but how do they not interfere with each other?

     Maybe it's just random back-off? Doesn't have to scale much beyond 15-20 items...