Grrrrr.
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@Edent yo that looks really cool, is it something like this? https://www.aliexpress.com/item/1005007864502249.html
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@benjojo similar. That one has, I think, a built in NFC badge.
This is the one I've got https://www.mrbretail.com/hsn371-battery-powered-electronic-name-badge-product/
It has a battery in it, so it can work with Bluetooth rather than just NFC.
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Sara Joy :happy_pepper:replied to Terence Eden last edited by
@Edent gosh that's a lot of flickering - maybe to prevent stuck pixels on transition?
I feel like it needs to look like the moving pictures in the newspapers from Harry Potter.
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Terence Edenreplied to Sara Joy :happy_pepper: last edited by
@sarajw Yeah, black and white eInk can move pretty quickly - but colour still takes a lot of work.
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@Edent How much did they cost you?
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@andydavies ~£16ea + £3 for the battery. I had a free shipping coupon for AliBababa.
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Graphic Design Is My Passion etc - but there is only so much you can do with four colours
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@Edent Which four colours do you get?
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@billgoats all of them
Black, white, red, yellow. What more do you need?
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Trying to work out how best to reverse engineer this eInk badge.
I have a Windows app which communicates with a USB dongle. Could I sniff the communications from VirtualBox to my Linux host?
I have an Android app. I can decompile it, but I'm not really sure what to look for. Can I wireshark the Bluetooth LE connection it makes?
Thoughts gang?
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@Edent I’d start with BTLE packet sniffing if that’s something you can do. If it’s unencrypted, you’re off and running. If it is, then decompile the app and go look for the key. If you then get lucky and find commands in an easy to read format, great, but I avoid reading decompiled code at all costs.
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@benetherington which sniffer for Android do you recommend?
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@Edent No clue, sorry!
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@benetherington Have you ever done any BLE packet sniffing?
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@Edent No. As far as I know, you need dedicated hardware for it. Maybe there’s a way to convince an NRF chip into sniffing mode? I have an iOS app published by Nordic that shows advertising packets, but once devices are paired, I’m out of my depth.
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@benetherington I'm sorry, I'm struggling to understand why you bothered replying at all?
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@Edent Yes, Wireshark can sniff USB both on your Linux host and (I believe) the Windows guest.
On Linux you could also use the "usbmon" kernel module directly (which is what Wireshark's using).
https://wiki.wireshark.org/CaptureSetup/USB
https://docs.kernel.org/usb/usbmon.html -
@henryk aha! Thanks. For some reason, my laptop won't let me use usbmon. Trying to add it just gives
modprobe: ERROR: could not insert 'usbmon': Invalid argumentWill bash my head against the keyboard until it works
