CODESYS - the IEC 61131-3 automation software

QR-code generation
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Author:  e.kislov [ Fri May 17, 2019 5:25 pm ]
Post subject:  QR-code generation

There is a simple example how to generate a QR-code and show it in web-visu: Example_QrCode_RPI.projectarchive

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1. You need to install qrencode:

sudo apt-get install qrencode

2. You need to install OwenStringUtils library. It included in projectarchive or you can install it separately: download
It's nice lib with additional string functions like ASCII/Unicode conversion, formatting and parsing.

3. In example used SysProcess library.
So you need to add in /etc/CODESYSControl_User.cfg next lines:


Keep in mind that you need to have write access rights:

sudo chmod 0666 /etc/CODESYSControl_User.cfg

4. You need to set write access rights for /visu directory:

sudo chmod 0666 /var/opt/codesys/PlcLogic/visu

5. You can see qr-code in web-visu, but not in service-visu (CODESYS IDE-visu).

Author:  Majabuc [ Mon Aug 26, 2019 11:35 am ]
Post subject:  Re: QR-code generation

Hello, I tried to install it on SoMachine 4.3 from Scheider, but it returned several errrors.
I'm looking for an example that generates qr code to print from a Modicon PLC programmed with CoDeSys.

Could you help me please?

Thank you very much!


Author:  e.kislov [ Mon Aug 26, 2019 11:59 am ]
Post subject:  Re: QR-code generation

Not sure that it's possible with SoMachine...
I think you should to connect with Schneider support

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