@russss Now that's next level tracking! Thanks for bringing this to our attention :)
@russss Wenn are you leaving? I'd like to check my gear.
@russss I cut it each time I bought something at Decathlon.
Can you tell me which frequency they use?
This will get very interesting. I heard people saying, that Decathlon deactivates the tags when you leave, and I thought them to be very short range. But both assumptions don't seem reliable now. oO
@bg 868MHz ISM band in the EU, 915MHz in the US.
The "deactivation" on purchase happens by setting a flag in a database rather than deactivating the tag.
@russss How do you recognize, remove them?
@russss Those tags still work after the product is bought? so they're not anti-theft devices which are deactivated when paid for?
@Hippolyte they are anti-theft but they're also used for inventory control. They are marked as purchased in a database once the product is checked out, rather than physically deactivated.
@russss I'd bet there's mine in these…
@russss I knew I've been keeping those for a reason!
@russss Holy shit this is ugly. Great work putting it to the test! I'd like to know if the range can be boosted akin to bluetooth sniping. How can affected customers find and disable these hidden beacons?
@mplammers the best commercial readers can read ~400 tags/sec at 25m range.
Tags can be cut out and they're usually quite obvious.
@russss do you have any recommendation for home use? i.e. if I wanted to scan my immediate surroundings from time to time to check for tags?
@russss emerging profession: RFID pest control.
@amenthes not really, the long range readers are quite expensive, although sometimes you can get a good deal on eBay
@russss *stands up, grabs a scissor and walks into the basement*. Awesome find there!
@ao yup, I actually borrowed it from someone but you can get Chinese USB reader/writers for £50 from AliExpress.
@russss just to clarify: these tags identify the individual item, not the product? So two of the same product (like, two pairs of socks) should have different, unique IDs?
@mmcm I'm still working my way though the monstrous EPC specifications but I believe the tag ID contains the manufacturer, product code, and product serial number
@mmcm so two pairs of socks will have the same product code but different serial numbers
@russss great, that means if I install a mid-range reader next to the river in Grenoble, I can generate workout/travel profiles for half the town. 🙈
@russss Thanks for letting us know!
A bag I've been travelling with a lot has such a tag inside and I never noticed.
Will never buy anything there again
Blurring isn't of much use if you provide a hint about the font, sadly.
@kaiyou yeah I know - I was tired and I'm fairly sure the tags displayed on screen are mine anyway :)
To be honest, there's a dashed line that shows where to cut. This tag makes clothing uncomfortable, so I always cut it out, without even knowing that it's an RFID tag... Good to know anyway, thanks! Now I know exactly, how the self service in Decathlon works, where you simply put the stuff in the bin without scanning it.
@sp6mr yeah, the self-checkout is what started me looking at this! (I don't go to physical stores much it turns out...)
With larger camping gear the tag is less noticeable/annoying. Clearly not everyone cuts them out if I found 145 tags!
Also apparently in shoes, the tags are hidden *under the insole*.
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