Samsung SHS-2920 *DOES NOT WORK*
Thanks for sharing that, the entire post was a very good bit of info from Amal who certainly knows NFC.
The section I've quoted is the assumption I've been operating under (bad form to assume, I know, but still) - the Samsung door lock I've received will read mifare tags and register them but is rejecting or failing to read NTAG203.
The part about them only registering the UID is why I felt safe ordering one and why I would prefer a door lock that only reads UID - it means that no matter what I do with the tag it will still open the door once it's registered to it, even if I later on change the info stored on the tag as I've been doing at random moments.
That this lock is reading the mifare tags but not the NTAG203 (I've tested quite a few) possibly means that it's also checking something else whether it's total storage available or tag type or whatever it may be.
The tags once registered still work after I have re-written the storage space so it can't be writing a key or password of some sort and must still be operating off a list of allowed UIDs, just perhaps also checking tag type in some manner.
All in all, bloody infuriating. I've been regularly using far worse words than that.
I also bought a 2920 to test this and it doesn't support any ISO 14443 A cards so this is basically a unit we would[b:2uo0tlou] strongly recommend ring barers avoid purchasing a SHS-2920![/b:2uo0tlou]
What a joke!
Quite a surprise isn't it... the write up touts it's ISO14443A compatibility, then doesn't deliver.
Could we get some verification of which units you've tried and successfully used, John?
SHS- the red one
Ordered to test:
Should have some more results within a few weeks, wish someone else would be doing this though, I really don't have a lot of time to do thorough tests!
Cool, thanks for that John!
The red one is the 2420/2421 I reckon.
I think the majority are sitting back and waiting to hear which ones work...
[quote:zazyja4v]I think the majority are sitting back and waiting to hear which ones work...[/quote:zazyja4v]
Don't wait for me on this!
It'll be another month before I can spring for another.
Everyone reading this, c'mon and take a punt, grab a lock and test it and report how you go here.
We'll get through them all a lot quicker and have a decent list of what works and what doesn't!
What about the 1521 which seems to be the latest model? We use 2 of these at work and they are very good - they are the only reason why I have ordered the ring! I guess if it works most of our 25 staff will buy a ring as currently we make 20 of them use a code and not the tags.
Am happy to test but it looks like a couple of months before I'll get the ring!
To be honest I don't think we will know until you try it, all I can offer is to be persistent and test it thoroughly before letting us know how you go.
Samsung have taken a slightly liberal approach to interpreting the standards which is quite frankly pissing me off.
...because of following the NFC forum for sooooo long whilst still awaiting the shipment of my original kickstarter order... I have purchased the Samsung door lock and LOVE IT! Turns out the NFC ring can merely hold either - the unlock code or personal info - not two info-bits... Mmmmh Well, I keep snooping around in the blogs for more info, feeling like a well inforemd NFC ring geek without the very item that would make me a "fully respected" member... Until soon!
Hi @chefraphael, which model did you end up buying? The NFC ring should be good on a doorlock regardless of what is programmed onto the inlay, most doorlocks will only bother reading the UID (which is fine by me!)
I got the 2920 - looks snazy and everyone around me is now pondering to purchase one too! ha hhere is one oddity with the door lock - when programming a new NFC tag you have to "re-program" all the older ones too... hence I figgured it does not just "read" the UID...
Ah. You may have issues with the 2920 reading NTAG203. The one I have here simply does not like NTAG chips and will only function with mifare cards/fobs.
I found it's key storage design to be ridiculous, every time you enter programming mode it dumps its memory and you have to enter each key again.
You can prove to yourself that it uses UID by programming the cards into the door lock, then re-writing what's on one of the cards - it should still work with the lock fine regardless of what you've personally got stored on it.
Now for the kicker, as I figured out (I still stare at the 2920 sitting half in and half out of it's box in the dunce corner of the lounge room) the 2920 doesn't like the NFC Ring.
This would be due to it's refusal to work with NTAG203, the NFC chip which the NFC Ring is based on.