Re: QR Codes Message #3 Posted by Egan Ford on 27 July 2013, 5:25 p.m., in response to message #1 by jerome ibanes
Quote:
If so, it might be a nice way to backup a WP34+IR, HP-42 or else.
Dunno about "nice". E.g. 'A'. there's 7 or 8 bits of data. The equivalent in QR would be 8 blocks + redundant data (just in case part of the QR is lost--redundancy is tunable) + markers for mobile phones and other capturing devices.
The largest QR codes (which I doubt the 82240B could produce in readable form) have relatively little data. At best, you get a URL out of it for use online (to get even more data :-).
I'd think a program listing would be 'nice' and for data, some type of ASCII dump.
Now I can think of other uses for a QR code generator on the 34 or 42. E.g. a program or a game that needs to send out for more visual data for the user that then uses that info for a prompt. E.g. an adventure game. You could have 1000s of URLs with content like pictures, sounds, and text. But the logic on the 34/42. When the calc needs to tell you a story or give you more data, you get a QR code. You then scan that with your phone, review the website, and move forward with the game on the 34/42.
My version of something similar for the Apple IIe computer:
http://asciiexpress.net/gameserver/gameserverclient.mp4
I found it easier and faster to pre-compute the QR codes. Generating QR codes on the 42 may take a very long time. 34, no problem.
If you really wanted to be annoying you could create an ad-based program that from time to time requires that you print out a QR code, go the web site where you'll be greeted with an ad and a code to continue using the program.
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