Protocol Buffers with small code size

Small portable AES128/192/256 in C

A fast and compact QR Code encoding library

🛡 Make safest code in Android. (基于libsodium实现chacha20算法,key在native中,防止被二次打包){长期维护,请star,勿fork}

Customizable Bootloader for STM32 microcontrollers. This example demonstrates how to perform in-application-programming of a firmware located on an external SD card with FAT32 file system.

STM32 HAL-based library for ST7735 displays

USB over IP

Small GUI Library of MCUs

AES, CMAC, SHA256, HMAC and RSA written in C.

PWM library with examples for the nRF51x22. Supports up to 4 PWM channels, and can be used with or without a SoftDevice.

NRF52 audio player with PWM & opus