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+---
+layout: mini
+comments: true
+title: "QR CODE MAKING: BIGGER IS SMALLER"
+permalink: /n/qr.html
+sitemap: true
+excerpt:
+  WHEN YOU MAKE QR CODES, CAPITAL LETTERS MEAN SMALLER QR CODE AND OTHER NOTES
+  ON MAKING THEM.
+---
+
+# QR CODE MAKING: BIGGER IS SMALLER
+
+_{{ page.excerpt }}_
+
+That is a neat trick
+[from Terence Eden's blog where the cause is also explained](https://shkspr.mobi/blog/2025/02/why-are-qr-codes-with-capital-letters-smaller-than-qr-codes-with-lower-case-letters/).
+
+<!-- editorconfig-checker-disable -->
+<!-- prettier-ignore-start -->
+
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+<em lang="fi">Automaattinen sisällysluettelo</em> / <em lang="en">Automatically generated Table of Contents</em>
+
+- [qrencode](#qrencode)
+- [WiFi QR codes](#wifi-qr-codes)
+  - [iwd Device Provisioning Protocol](#iwd-device-provisioning-protocol)
+- [Other methods of generating QR codes](#other-methods-of-generating-qr-codes)
+- [QR code readers](#qr-code-readers)
+  - [See also](#see-also)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+<!-- prettier-ignore-end -->
+<!-- editorconfig-checker-enable -->
+
+## qrencode
+
+`qrencode` is my favourite method of creating QR codes, with the above fact a
+small QR pointing to my website would be:
+
+- `qrencode -t utf8 -i https://aminda.eu`
+  - `-t utf8` outputs to terminal as unicode and `-i` ignores case turning input
+    UPPERCASE.
+
+However my former goto was:
+
+- `qrencode -l H -t utf8 https://aminda.eu` which would feature higher error
+  correction allowing more damage (including art) while still working.
+
+Storage:
+
+- `qrencode -i -s 6 -l H -o aminda.eu https://aminda.eu`
+  - This `-s 6` doubles the pixel size, `-l H` uses highest error correction and
+    `-o aminda.eu` outputs the image to `aminda.eu.png`. This could be converted
+    through `magick aminda.eu.png aminda.eu.jpg`
+
+However usually I end up to
+[qr.bash](https://gitea.blesmrt.net/mikaela/scripts/src/branch/master/bash/qr.bash).
+
+## WiFi QR codes
+
+For details on the specification, please refer to
+[Barcode Contents on zxing wiki instead](https://github.com/zxing/zxing/wiki/Barcode-Contents#wi-fi-network-config-android-ios-11).
+
+- Open network with SSID `openwireless.org_nomap`:
+  `qrencode -t utf8 "WIFI:T:nopass;S:openwireless.org_nomap;;"`
+  ([wifiqr-open.bash](https://gitea.blesmrt.net/mikaela/scripts/src/branch/master/bash/wifiqr-open.bash))
+- WPAX protected network with SSID `Hollow` and key `Bastion`:
+  `qrencode -t utf8 "WIFI:T:WPA;S:Hollow;P:Bastion;H:false;"`
+  ([wifiqr.bash](https://gitea.blesmrt.net/mikaela/scripts/src/branch/master/bash/wifiqr.bash))
+- Hidden networks? Change the `H:false` to `H:true`.
+
+### iwd Device Provisioning Protocol
+
+If you are using iwd for WiFi management, forget the above and to add a new dpp
+capable device onto your network, instead `iwctl dpp wlan0 start-configurator`
+which requires `qrencode`.
+
+To stop provisioning new devices `iwctl dpp wlan0 stop`.
+
+Obviously don't include the dots and replace `wlan0` with your actual interface.
+
+## Other methods of generating QR codes
+
+- [DuckDuckGo search beginning with qrcode](https://start.duckduckgo.com/?q=qrcode+HELLO+WORLD)
+- [Firefox add-on: Offline QR Code Generator](https://addons.mozilla.org/firefox/addon/offline-qr-code-generator/)
+  - This has spared me headache countless times on school computers for getting
+    URL stored to my browser from school computers or virtual machines without
+    complicated setups.
+- [Chrome Web Store: QR Code](https://chromewebstore.google.com/detail/qr-code/cbimgpnbgalffiohilfglgkkhpegpjlo)
+- BinaryEye & SecUSo for Android below
+
+## QR code readers
+
+- The stock Camera app.
+  - At least on iOS and SailfishOS.
+- [BinaryEye](https://github.com/markusfisch/BinaryEye) is my go-to app for QR
+  codes and will tell you more than you might want to know about them.
+  [Google Play](https://play.google.com/store/apps/details?id=de.markusfisch.android.binaryeye)
+  [F-Droid](https://f-droid.org/en/packages/de.markusfisch.android.binaryeye/)
+- [SecUSo: Privacy Friendly QR Code Scanner for Android ](https://github.com/SecUSo/privacy-friendly-qr-scanner)
+  [Google Play](https://play.google.com/store/apps/details?id=com.secuso.privacyFriendlyCodeScanner)
+  [F-Droid](https://f-droid.org/repository/browse/?fdid=com.secuso.privacyFriendlyCodeScanner)
+
+### See also
+
+- [Mikaela/gist directory vcard](https://gitea.blesmrt.net/mikaela/gist/src/branch/master/vcard)