v21.1.0 - Print everything
In this release, the proxy now listens on the printer serial port at 9600bps, and interprets whatever arrives as ImageWriter II data. That's it: surl-server is now also an ImageWriter II!
After receiving a document, it will either be available on ftp://surl-server.local/prints/, or be sent to the printer of your choice.
Be sure to read the docs : https://www.colino.net/wordpress/en/surl-server-a-serial-proxy-for-8bit-computers/