Wir haben #Aufsteller, die so aussehen -
https://hamburg-werbefrei.de/unterschriftenlisten-aufsteller
Es kann aber auch einfach ein auf dem Tresen plaziertes #Klemmbrett sein, wenn kein Platz für einen Aufsteller ist.
Wenn Unterschriftenlisten nicht gehen, hilft auch das Auslegen von #Flyern oder des #QR-Codes zum #Unterschreiben schon.
ach ich liebe es - so mein neuestes #plugin für #wordpress ist vorbei - ein #qr generator das wirklich nur das tut ohne kaffee kochen
jetzt habe ich 3 tage nach einem #qr #plugin für #wordpress gesucht und nichts gescheites gefunden....
also code ich halt was eigenes... ist ja nur plugin xxx bei mir
Selfhosted QR-Code-Generator
Gibt zwar reichlich Online-Angebote, aber ist mit docker compose in 5 Sekunden installiert. Hat eine Reihe von interessanten Features dabei - neben Design-Gestaltungen CSV-Import, Bulk-Export, PNG/JPG/SVG usw.
via @selfhst
#QR codes mit #Python und #uv generieren:
uvx --from qrcode --with pillow qr "https://example.com/?utm_source=print&utm_medium=flyer&utm_campaign=qr-march25" > example-qr-print-flyer-march25.png
Huh?
I keep forgetting that you can share a QR code. I'm going to print this out and turn it into stickers, and place them around town haha!
@alextecplayz I seem to have issues in reading #Codeberg's #QR code in #Aegis. It starts the camera all right but refuses to acknowledge the QR code on the screen. Weird.
@kuketzblog #Datensparsamkeit ist der erste Schritt fuer mehr #Datenschutz und erhoeht automatisch mit die #ITsicherheit in gewissen Maßen. Daher gebt nur dort Eure echten Daten /eMail-Adresse(n) / Anschrift an, wo unbedingt notwendig und prueft mehrfach auf welche Wedsite Ihr wirklich gelandet seid inkl. der zugehoehrigen Verschluesselung.und der Zertifizierungsstelle ! ...
...Einfach so #QR-Codes eingelesen oder #URLs von verlinkten Websites, insbesondere Kurzlinks folgt man nicht.
#IT Frage an das #Fediverse bez. #gesundheitswesen .
Auf der Medikamentenverordung meines Vaters ist ein #QR -Code, den man ganz normal auslesen kann und offensichtlich die Verordnungen enthält.
Wie heißt diese Kodierung und wie kann man diese Interpretieren?
blog! “A Recursive QR Code”
I've been thinking about fun little artistic things to do with QR codes. What if each individual pixel were a QR code?
There's two fundamental problems with that idea. Firstly, a QR code needs whitespace around it in order to be scanned properly.
So I focussed on the top left positional marker. There's plenty of whitespace there.
Secondly, because QR codes…
Read more: https://shkspr.mobi/blog/2025/03/a-recursive-qr-code/
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#art #qr #QRCodes
Did you know that you can invoke Siri Shortcuts by scanning a QR code? The shortcut has to exist on the device on which you scan the QR code, of course. The URL you have to encode is:
shortcuts://run-shortcut?name=<insert shortcut name here>
The shortcut name can even contain spaces and they don’t have to be encoded as %20, easy peasy.
One of my use cases: Enable/Disable the guest wifi by scanning a QR code that sticks on a door.
#qrcode #sirishortcuts #ios #iphone #automation #workflow #qr
Making easy-to-scan #QR codes is an under-appreciated skill.
Not using super long URLs from some verbose CMS is a good start, but there's more tricks:
blog! “Why are QR Codes with capital letters smaller than QR codes with lower-case letters?”
Take a look at these two QR codes. Scan them if you like, I promise there's nothing dodgy in them.
Read more: https://shkspr.mobi/blog/2025/02/why-are-qr-codes-with-capital-letters-smaller-than-qr-codes-with-lower-case-letters/
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#qr #QRCodes
Why are QR Codes with capital letters smaller than QR codes with lower-case letters?
Take a look at these two QR codes. Scan them if you like, I promise there's nothing dodgy in them.
Left is upper-case HTTPS://EDENT.TEL/ and right is lower-case https://edent.tel/
You can clearly see that the one on the left is a "smaller" QR as it has fewer bits of data in it. Both go to the same URl, the only difference is the casing.
What's going on?
Your first thought might be that there's a different level of error-correction. QR codes can have increasing levels of redundancy in order to make sure they can be scanned when damaged. But, in this case, they both have Low error correction.
The smaller code is "Type 1" - it is 21px * 21px. The larger is "Type 2" with 25px * 25px.
The official specification describes the versions in more details. The smaller code should be able to hold 25 alphanumeric character. But https://edent.tel/ is only 18 characters long. So why is it bumped into a larger code?
Using a decoder like ZXING it is possible to see the raw bytes of each code.
UPPER
2462 
20 93 1a a6 54 63 dd 28
35 1b 50 e9 3b dc 00 ec
11 ec 11lower:
41 26 87 47 47 07 33 a2
f2 f6 56 46 56 e7 42 e7
46 56 c2 f0 ec 11 ec 11
ec 11 ec 11 ec 11 ec 11
ec 11You might have noticed that they both end with the same sequence: ec 11 Those are "padding bytes" because the data needs to completely fill the QR code. But - hang on! - not only does the UPPER one safely contain the text, it also has some spare padding?
The answer lies in the first couple of bytes.
Once the raw bytes have been read, a QR scanner needs to know exactly what sort of code it is dealing with. The first four bits tell it the mode. Let's convert the hex to binary and then split after the first four bits:
TypeHEXBINSplitUPPER20 9300100000 100100110010 000010010011lower41 2601000001 001001100100 000100100110The UPPER code is 0010 which indicates it is Alphanumeric - the standard says the next 9 bits show the length of data.
The lower code is 0100 which indicates it is Byte mode - the standard says the next 8 bits show the length of data.
20 9300100000 100100110010 0000 10010lower41 2601000001 001001100100 000 10010Look at that! They both have a length of 10010 which, converted to binary, is 18 - the exact length of the text.
Alphanumeric users 11 bits for every two characters, Byte mode uses (you guessed it!) 8 bits per single character.
But why is the lower-case code pushed into Byte mode? Isn't it using letters and number?
Well, yes. But in order to store data efficiently, Alphanumeric mode only has a limited subset of characters available. Upper-case letters, and a handful of punctuation symbols: space $ % * + - . / :
Luckily, that's enough for a protocol, domain, and path. Sadly, no GET parameters.
So, there you have it. If you want the smallest possible physical size for a QR code which contains a URl, make sure the text is all in capital letters.
This blog post was exhibited at QR Show, NYC
Russian hackers target Signal accounts in growing #espionage effort
Google’s Threat Intelligence identified rise in #Russian state-backed #hacking aimed at compromising #Signal #messenger
Primary technique involves exploiting Signal’s linked devices feature, allowing users to connect additional devices to their accounts
Hackers create malicious #QR codes when scanned, link a victim’s Signal account to a hacker device
https://kyivindependent.com/russian-hackers-target-signal-accounts-in-growing-espionage-effort/
#Hackers explotan la función de dispositivos vinculados de #Signal para secuestrar cuentas por medio de códigos #QR maliciosos
https://blogs.masterhacks.net/noticias/hacking-y-ciberdelitos/hackers-explotan-la-funcion-de-dispositivos-vinculados-de-signal-para-secuestrar-cuentas-a-traves-de-codigos-qr-maliciosos/
