My guess would be either they have some serialization thing with a lock bit (There's a fuse baked into the chip that you can blow to keep it from being written to again) or use a combination of the UID that they validate online and a counter to track if the Program should lock out that UID so you can't do what OP suggestedĬonfirmed, the value gets written to the C0 and C1 protected bits in the RFID tag when the label is printed or a blank label advanced which is what I just tried. Rather, they store a NDEF record, which is a data record that can be manipulated (If they decide to use the tag to make sure you can't tape it to the side, and is only good for X number of labels, they'd have a counter record or some such) (I haven't had a chance to look at one yet, but hpefully can dig into a tag next week) as mentioned, NFC tags (Which I believe is what Dymo's using for these) do not have rewritable UID's in most cases. How hard is it to rewrite the chip: That depends on the chip in the label, and how Dymo is choosing to deal with the DRM stuff. You also have UHF, which depending on if it's an active or passive tag, can range from between 300 to 1000 MHz, but the passive tags (Like the toll booth stickers for your car) are generally at 900Mhz. There are other standardized fequencies between the two, such as 134kHz, which is used for things like pet chipping and whatnot. This frequency has other applications and has been used for wireless temperature and glucose level monitoring. The majority of NFC tags have a data capacity however, and can store many kinds of information (This is what Amiibos and more modern work badges use) The use tags generally have a UID that cannot be rewritten, though there are some exceptions. "NFC" is a High Frquency RFID, at 12.56MHz, and is used for mostly the same things as the old Low frequency tags.
it's an older thing, and isn't as used as it used to be. RFID is _generally_ used to refer to 125 kHz, but just means RadioFrequencyIDentification and covers a wide range of standards.Īs mentioned above "RFID" generally is attached to 125khz, and is mostly used for things like work badges and inventory tracking. But that rant should go to an HP subreddit probably, sorry. That worked for a few months I guess, but NOW HP is molding/gluing the chips in to the cartridges. There are kits to help you transplant the old chip to new toner cartridge.
HP has also drank this Kool-Aid and is using chip detection for "genuine" HP toner cartridges. Proving once again, there a subreddit for EVERYTHING (or there will be!). THIS is the exact discussion I've been looking for. Kudos to the OP here and everyone else participating in this discussion. I am always in proximity to the printer so I know when it's running low (old school style!?!). How easy/hard would it be to read/write (edit) the "chip" on the fly weekend you change labels?Īm I wrong to think editing to say there's "999" labels on a roll or whatever would be a quick & dirty fix for the count aspect? Label type itself would be different. What's the difference between RFID or NFC? So I have a bit of a tech background (about 4 years of data communications + ~30 years of IT experience), I tried last month and have a little time to play now.
As I understand it, "green" labeled boxes = "Automatic Label Recognition" (RFID/NFC) compatible. One site forum said if you had any old "blue" labeled Dymo boxes that Dymo would cheerfully exchange them for newer "green" labeled boxes. Tons of stuff via Google bitching about it (Dymo's brilliant idea) but no remotely viable solutions until I read this. I had no idea they had instituted "Automatic Label Recognition" crapola. I had a Dymo 400 that crapped out after years of reliable use. Guys, I can't thank you enough for this very valuable info!
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