[GNC-dev] EPC QR code

[Rainer Dorsch]

Am Sonntag, 16. Januar 2022, 18:07:31 CET schrieb john:
> > On Jan 16, 2022, at 8:37 AM, Rainer Dorsch via gnucash-devel
> > <gnucash-devel at gnucash.org> wrote:
> > 
> > Hello,
> > 
> > many thanks for all the effort you put in gnucash. It is a really useful
> > and very stable tool and that for many years (even decades!)
> > 
> > I recent times I often see QR codes on invoices. I quick search revealed
> > that they are standardized by the European Payments Council
> > 
> > https://en.wikipedia.org/wiki/EPC_QR_code
> > 
> > Is there any plan to support reading these QR codes with e.g. the laptop
> > camera and extract the data required for the  SEPA credit transfer?
> 
> There isn't, and adding the ability to access the camera would involve
> adding GStreamer as a dependency, not an easy task.

Thanks for you quick reply.

I dug somewhat more:

There is a tool QtQR which e.g. produces

BCD
001
1
SCT
SOLADES1TUB
Landkreis T羹bingen - Kreiskasse
DE43641500200000000048
EUR693.00


5.1099.220039.0
Geb羹hrenbescheid-Nr. 20220039 vom 12.01.2022

(the "Asian" letters should be the German umlaut ü, not sure what is going 
wrong there)

So calling an external tool would probably be sufficient and using the response.


QtQR is using python3-qrtools under the hood, which are less then 300 lines of 
code.

python-qrtools has a 

    def decode_webcam(self, callback=lambda s:None, device='/dev/video0'):

function.

Since I scan the invoices with the qrcode anyways using a pdf file as data 
source would also be a good approach, though it seems with python3-qrtools the 
webcam approach is more straight forward.

I can do more experimenting with python3-qrtools if you think the approach is 
viable and somebody is willing to do the gnucash integration:
- Add a button in the SEPA transfer dialog
- Call an external tool
- Process the data as defined by the EPC QR code
- Fill them in the fields of the SEPA transfer form

Many thanks
Rainer

-- 
Rainer Dorsch
http://bokomoko.de/