3rd-Party Libraries

QR Code

The QR-Code-generator library by nayuki is a 3rd-party library that generates QR-Code bitmaps.

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The QR-Code-generator library by 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.

Usage

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

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

If you need to re-modify the size and color, use lv_qrcode_set_size and lv_qrcode_set_dark_color or lv_qrcode_set_light_color respectively, and then call 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.

Example

Create a QR Code

lv_example_qrcode_1.c

API

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LVGL comes packaged with various tools that can help you debug problems you may encounter during development and testing.

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UsageNotesExampleCreate a QR CodeAPI