xEM affected by temperature changes?

To reply more visually, this is the range of the ACM08Y reader I use at work, with the IAR EM4305 in my hand, and the xEM in my foot:

Kinda hard to achieve poor positioning on the reader :slight_smile:

And yes, sad ole me is at work today.

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Only rosco would see it as normal to be sat with feet on a high power reader and waving around his feet on camera :sweat_smile:

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Nothing terribly extraordinary to me…

On the other hand (pun), think what you will, but at least if someone wants a long-range reader, or an implant in the foot, or both, you gotta admit that’s pretty good documentation material right there :slight_smile:

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That’s a neat reader, but I can’t believe they’re charging €89 for it. Must have some excellent proprietary firmware.

That’s the price of laziness. You can do cheaper with an arduino, an NFC board and some time to put it all together. But I want plug and play. So I pay a premium for the privilege.

Amal: boss is okay. You can send stuff over to test if you’d like. There’s room for as many as you want of any kind in the 4 temperature chambers, and room for maybe 10 / 12 glassies on the drop tester’s carrier (fewer than that if you want to test flexies).

And if perchance you want to test crushing a few under the drop tester’s impactor, I can put 2 or 3 glassies, or 1 or 2 flexies there. But I suspect if they don’t shatter or get mashed into a pulp, they’ll quickly become embedded in the wood. So maybe it’s not such a great test. Still, if they survive, that’d be impressive :slight_smile:

Photos and videos of course.

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sweeeet!!

haha no way… the x-series would send glass shattering everywhere. the magic of x-series is that it’s slightly higher strength than your tissue so your tissue loses and squishes out of the way, absorbing energy as it does… it’s still just glass. the flexies… that’s another thing… but honestly, if a screwdriver being rammed into it with a hammer isn’t convincing… i mean… well hahah :slight_smile: the mob packaged chip though… that will definitely shatter too under an impactor… so meh… not worth testing.

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I was under the impression that they were filled to the brim with epoxy - thereby making them solid plastic objects with a glass coating, essentially. That’s why I thought a crushing test might be relevant - or at least a good stunt.

yeah there is resin inside but its not rock solid… and even if it was the glass itself is still going to be easily crushed and peel off like the candy shell of an M&M :wink:

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Tell you what: after I’m done running whatever you send me in the temp chambers and on the drop tester, I’ll pick one and put it underneath next to that crap DSruptive faux NeXT chip I have and I’ll hammer both down with the video rolling. If yours happen to survive, you’ll have your stunt video.

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Holy crap, I ordered those things on Nov 6 and they’ve only just landed at customs in Helsinki. 23 days to do 1,300 miles… The Serbian post must do international shipping on foot.

Aargh! What the hell possessed me to buy from the manufacturer direct outside of the EU. I’ve just been hit with 24% VAT + 15% import duty :frowning: Fuck a duck…

This is turning into an inordinately expensive purchase. Them readers had better work REALLY good.

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Satur9, to answer your remark: I’ve dived into Digital Logic’s documentation and software for their uFR series devices for a few hours. It’s fabulously well documented, down to the last protocol byte. If you don’t want to deal with low-level stuff, the API is simple and no-nonsense (it’s just a single DLL or .so file). The set of commands is impressively comprehensive - it even has a magic Mifare check command :slight_smile:

In the case of that particular reader, it’s clever actually: it’s essentially their basic serial uFR Nano reader with an additional board to redirect the serial comm over BLE, TCP, UDP, HTTP or Websocket or let it through transparently over USB serial. If you don’t use it in “cooked” mode, you can basically talk to the reader over any of those links using the documented serial protocol (or using the API DLL). Only drawback I can find is, the comm is in clear, so not great over insecure networks.

The documentation is a bit hard to find on their website, and a lot of it is what they call “hands-on, real-life implementation examples” (which means “read the code” :slight_smile:) Also, they supply a PC/SC driver for Windows, but no pcsclite support in Linux, which sucks for those who use Linux. Other than that, really I have no complaint. It’s hard to find better supported NFC hardware out there - and believe me, I’ve bought more than a few readers.

So, I’d say well worth the money.

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Any results so far from temp testing?

Curious for long term but I’m guessing you’ve already exceeded anything reasonable

Not yet. I’ve yet to find time to go and check on all them chips. Work isn’t letting up and that’s kind of low priority if I’m honest.

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