How to print QR code generated in the Canvas to thermal printer in MIT APP Inventor 2?

[ABG]

(added to FAQ)

FAQ Section: Printing

ESC/POS Simple Converter Extension - Daniel K. Experiences with the Jimdo.com ESC/POS Converter - @Bob_Holden [PAID] Thermal Printing extension (Bluetooth/Network) - mmnettime Printing in ZPL from text blocks - David_S, Juan_Antonio, Peter, ChrisWard Reference Material Epson ESC/POS(R) Reference Manual Defunct Image Print Extension - ILoveThunkable (missing)