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   blinry (blinry@chaos.social)'s status on Monday, 22-Jan-2024 06:33:48 JST blinry

   • ​Piko

   Learn how QR codes work, and how to read them without a computer!

   @piko and I just released the interactive explainer that we used in our workshop at #37c3!

   ✨ https://qr.blinry.org ✨

   • Haelwenn /элвэн/ :triskell: repeated this.
   • Embed this notice
     HAMMER SMASHED FILESYSTEM 🇺🇦 (lkundrak@metalhead.club)'s status on Monday, 22-Jan-2024 06:33:47 JST HAMMER SMASHED FILESYSTEM 🇺🇦

     in reply to

     • ​Piko

     @blinry @piko thank you
     i can now finally throw away the fucking computer

   • Embed this notice
     blinry (blinry@chaos.social)'s status on Monday, 22-Jan-2024 06:39:05 JST blinry

     in reply to

     • ​Piko
     • lamitpObuS

     @lamitpObuS It wasn't, we added it today! :D @piko

     Haelwenn /элвэн/ :triskell: likes this.
   • Embed this notice
     lamitpobus@troet.cafe's status on Monday, 22-Jan-2024 06:39:14 JST lamitpObuS

     in reply to

     • ​Piko

     @blinry @piko Thanks for the answer. The “quiet zone” was the missing link.

     I now find it even on your page. Could swear it wasn't mentioned in December 2023. 🤔

   • Embed this notice
     blinry (blinry@chaos.social)'s status on Monday, 22-Jan-2024 06:39:16 JST blinry

     in reply to

     • ​Piko
     • lamitpObuS

     @lamitpObuS Yeah, the QR Code standard says that there's supposed to be a "quiet zone" around the code (which should be filled white). So that's probably what's happening there! If the quiet zone is not there, your reader doesn't recognize the code. @piko

   • Embed this notice
     lamitpobus@troet.cafe's status on Monday, 22-Jan-2024 06:39:17 JST lamitpObuS

     in reply to

     • ​Piko

     @blinry @piko To follow the talk was quite fun. Most probably I will never try to decode a QR code by hand.

     Regarding the separators. It's mentioned there need to be empty lines around the finder pattern, highlighted on two sides. When I place the QR code on a black background it cannot be scanned any more.

     * Has a QR code always to be placed on a white/light background?
     * Must empty lines surround the whole finder patterns?
     * Is it just a weakness in the QR code readers?
     * What do I miss?