[HN Gopher] OpenEPaperLink: Alternative Firmware for ZBS243-Base...
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       OpenEPaperLink: Alternative Firmware for ZBS243-Based eInk Shelf
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       Author : zdw
       Score  : 62 points
       Date   : 2023-05-20 04:53 UTC (1 days ago)
        
 (HTM) web link (github.com)
 (TXT) w3m dump (github.com)
        
       | vanburen wrote:
       | It would be awesome if smart shelf labels could be used to help
       | customers to search for and locate specific items in a store.
       | 
       | Something ultra wideband based, like air tags, would be great.
        
         | CartenLoor wrote:
         | Retailers are already implementing something alike where the
         | shelf labels will light up with an onboard LED when searching
         | for products
        
           | tetris11 wrote:
           | Oh ffs. This is just going to be an excuse to roll out
           | consumer-specific prices when a customer is alone in an
           | aisle. No one wins here.
        
             | smilespray wrote:
             | I can just imagine the tags going "Rich man walking!" as a
             | customer comes down the aisle.
        
       | yjftsjthsd-h wrote:
       | > Aims
       | 
       | > Low power (currently around 9uA with a minimum of 40 second
       | latency)
       | 
       | > Even lower power when there's no AP around
       | 
       | > Low latency (tags can check for new data every 40 seconds)
       | 
       | I wonder how hard it would be to tune it for lower power
       | consumption by intentionally making it sleep longer between
       | updates - if I know I only want it to update every hour, can I
       | set a schedule or at least have it only check every, say, 30m?
       | Seems like an easy win.
        
         | tecleandor wrote:
         | I'd say you can play with intervals around here...
         | 
         | https://github.com/jjwbruijn/OpenEPaperLink/blob/a2aea16de83...
        
       | wiml wrote:
       | It's a neat hack that the AP is just a repurposed tag, but since
       | they use 802.15.4 could the AP run on other arbitrary hardware?
       | Like the common nRF52840 based boards.
        
         | dmitrygr wrote:
         | Yes and I published firmware to do that a few years back. It
         | was featured on this site even. Everyone doing anything for
         | ZBS243 is building on my work since I was the only one to ever
         | reverse engineer that chip.
        
       | qingcharles wrote:
       | What's the best source to buy these tags on the cheap?
        
         | detaro wrote:
         | commercial liquidation sales/auctions, eBay
        
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       (page generated 2023-05-21 23:00 UTC)