QR Codes

georpo · Joined: 18 Nov 2008 Posts: 281 Location: Athens, Greece.

Hello friends!
Maybe this is s silly question but is there any way to generate QR code pixels from a string?

Thanks!
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George.

PrinceNai · Joined: 31 Oct 2016 Posts: 478 Location: Montenegro

With a Pic? Probably, if you know the rules on generation of QR codes. Otherwise there are countless websites that generate it from whatever you want.

georpo · Joined: 18 Nov 2008 Posts: 281 Location: Athens, Greece.

Yes with a PIC. I have epaper display connected to a PIC24 and I want to generate QR code and display it.

Thanks.
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George.

dyeatman · Joined: 06 Sep 2003 Posts: 1933 Location: Norman, OK

Here is Arduino src to create QR codes you can adapt to the PIC
https://www.arduino.cc/reference/en/libraries/esp-qrcode/
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PrinceNai · Joined: 31 Oct 2016 Posts: 478 Location: Montenegro

I'm looking through QR code generation pages, trying to narrow it down to actually how to make one from scratch. It looks like you'll have to decide on the size and version of it (I'd go with version 1, 21 x 21 pixels). So far this is the best site I 'we found:

https://www.keyence.com/ss/products/auto_id/codereader/basic_2d/qr.jsp

Ttelmah · Joined: 11 Mar 2010 Posts: 19504

Also the more correct library for the SSD displays is probably this one:
https://github.com/yoprogramo/QRcodeDisplay

However, this is only going to be translatable to relatively large PIC's.
The table sizes needed to generate the codes are quite large.