QRCode

A simple library for generating QR codes in C, optimized for processing and memory constrained systems. Features:

• Stack-based (no heap necessary; but you can use heap if you want)
• Low-memory foot print (relatively)
• Compile-time stripping of unecessary logic and constants
• MIT License; do with this as you please

这个 QRCode 很适合在 MCU 上，就一个 .c 和 .h 文件。