uuid4

A tiny C library for generating uuid4 strings. This module has been adapted from the original author to instead use the hardware based random number generator in an ESP32 to generate the seed for the uuid4. The ESP32 RNG entropy source is enabled using the bootloader_random_enable() function. The ESP32 RNG API reference can be found here.

Usage

uuid4.c and uuid4.h should be dropped into an existing project. The library contains two functions: one to initialize the library and one to generate a uuid4 string and store it in a buffer of at least UUID4_LEN in size.

char buf[UUID4_LEN];
uuid4_init();
uuid4_generate(buf);
printf("%s\n", buf);

uuid4_generate() is not thread-safe.

License

This library is free software; you can redistribute it and/or modify it under the terms of the MIT license. See LICENSE for details.