.. _qrcode:

======= QR Code

The QR-Code-generator library <https://github.com/nayuki/QR-Code-generator>__ by nayuki <https://github.com/nayuki>__ is a 3rd-party library that generates QR-Code bitmaps.

The lv_qrcode LVGL extension is an interface to that library which implements a custom Widget that generates and displays QR Codes using the library.

.. _qrcode_usage:

Usage

Enable :c:macro:LV_USE_QRCODE in lv_conf.h by setting its value to 1.

Use :cpp:func:lv_qrcode_create to create the QR-Code Widget. Then use :cpp:func:lv_qrcode_update to generate the QR Code on it.

If you need to re-modify the size and color, use :cpp:func:lv_qrcode_set_size and :cpp:func:lv_qrcode_set_dark_color or :cpp:func:lv_qrcode_set_light_color respectively, and then call :cpp:func:lv_qrcode_update again to update the QR Code.

Notes

QR Codes with less data are smaller, but they are scaled by an integer value to best fit to the given size.

.. _qrcode_example:

Example

.. include:: /examples/libs/qrcode/index.rst

.. _qrcode_api:

API

.. API startswith: lv_qrcode_