I think they’re just e-reader technology that accepts input by RF or something. Probably has an RFID on it, so a control node just (1) scans the RFID, (2) looks up price of product for that RFID, (3) send signal back to update the display.
Because I’ve looked at these things. I don’t see any modules for wireless communication over lan, Bluetooth, or anything like that.
See that window in the top left? It’s a combination photovoltaic cell and IR receiver, so the tag can be powered indefinitely from the shop lights and they can use ceiling-mounted IR blasters to update them. There’s no return path so the blasters just repeatedly transmit the entire inventory and price list, over and over.
IT DOESN’T NEED TO BE COMPUTER! IT IS A PRICE TAG! THERE IS NO REASON IT SHOULD BE ABLE TO RUN DOOM!
Technically, these digital tags are being developed to automatically update price from a database, so there is a computer somewhere.
I think they’re just e-reader technology that accepts input by RF or something. Probably has an RFID on it, so a control node just (1) scans the RFID, (2) looks up price of product for that RFID, (3) send signal back to update the display.
Because I’ve looked at these things. I don’t see any modules for wireless communication over lan, Bluetooth, or anything like that.
See that window in the top left? It’s a combination photovoltaic cell and IR receiver, so the tag can be powered indefinitely from the shop lights and they can use ceiling-mounted IR blasters to update them. There’s no return path so the blasters just repeatedly transmit the entire inventory and price list, over and over.