@fink I'm using Binary Eye (from FDroid) as a scanner app. Save the image and then use the "share to" function of your phone to send it to the app. Might work which other scanner apps as well. @Laempel@delta
@edi@fink@Laempel Delta Chat has an integrated QR code scanner for setup codes like this one :) Tap the QR Code icon on the Delta Chat mobile app main screen – on Desktop the QR Icon is in the left-side sandwich menu.