luban-lite-t3e-pro/packages/third-party/lvgl/lvgl-8.3.2/docs/libs/qrcode.md

QR code

QR code generation with LVGL. Uses QR-Code-generator by nayuki.

Get started

• Download or clone this repository
  • Download from GitHub
  • Clone: git clone https://github.com/lvgl/lv_lib_qrcode.git
• Include the library: #include "lv_lib_qrcode/lv_qrcode.h"
• Test with the following code:

const char * data = "Hello world";

/*Create a 100x100 QR code*/
lv_obj_t * qr = lv_qrcode_create(lv_scr_act(), 100, lv_color_hex3(0x33f), lv_color_hex3(0xeef));

/*Set data*/
lv_qrcode_update(qr, data, strlen(data));

Notes

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

Example

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

API

.. doxygenfile:: lv_qrcode.h
  :project: lvgl