https://github.com/thenickdude/steal-chads-password

Code to brute-force a specific incomplete QR code

Crack Chad's WiFi password

Compile with:

javac Main.java -classpath core-3.3.1.jar

Run with:

java -classpath core-3.3.1.jar:. Main qr.rgb

"core-3.3.1.jar" is the barcode decoder from zxing.

https://np.reddit.com/r/3Dprinting/comments/7ibqn3/made_a_qr_code_coaster_for_when_i_have_guest_and/dqy0yrx/