Today I was in Tesco in my city and I saw something quite interesting, that was electronic price tag:
I don't know how it happend, but on a parking I found this price tag in my basket beneath some old papers and leaflets... It was very late, so I decided to take it home and give them back to Tesco tomorrow or the day after tomorrow...
Now it lays on my desk and I'm wondering how this device works?
There are some printings on a sticker. A producer: Samsung, model SLT-EM005 and something very interesting: a MAC address.
When opened, there's a battery and PCB with two integrated circuits.
Larger one SSD1623L2/W232BU and smaller SAMSUNG ZBS242QRF/1234 (or Z8S242QRF... very small printings).
On PCB there's also a DYnamic NDO-VO text, a QR code and display that looks for me like E-INK, still displays price even when battery is away...
The problem is, that I couldn't found any datasheet of that IC. That are only my thoughts, but there must be some wireless network of this devices around the store. Does someone know anything more about this interesting thing?