It’s this time of the year when everyone asks for donations.
Here’s how you make an EPC QR code for SEPA transfers in #ConTeXt #LMTX:

\startluacode
local sum = 50.0
local subject = "Donation"
local qrtext=string.format([[BCD
002
1
SCT
RABONL2U
ConTeXt Group
NL04RABO0163223726
EUR%.02f
CHAR
%s
]], sum, subject)
figures.qrcode(qrtext,"blue",tex.sp("5cm"))
\stopluacode

According to
https://en.wikipedia.org/wiki/EPC_QR_code
it works with banks in Austria, Belgium, Finland, Germany, and The Netherlands.