ESP32 Forum

Hello,

is there a library for compression algorithm? I want to use huffman (or any other) kind of algorithm to compress my data.
I have a lot of hex values like These values should be compressed, before storing them, so the file size is way less.

- Saskia

ESP32 ROM code contains some functions from miniz compression library: rom/miniz.h.

Miniz has a number of APIs, but the ones which are available in the ROM are the low-level tdefl_*/tinfl_* compression and decompression functions.

You can use zlib library (https://github.com/madler/zlib).
Copy only the *.c & *.h files from root directory. I't compiles without problems.
You can find an example in https://github.com/loboris/ESP32_curl_example, components/zlib directory.

Hello,

thanks. I will try the zlib library.

- Saskia

https://github.com/madler/zlib is not building on esp32

Have any one manage to uncompress any zip format file include all sub folder into folder on esp32.

Thanks,
Naeem

I had to add #include <unistd.h> to gzread and gzwrite. Also, I added #include <unistd.h> and #include <sys/types.h> to gzlib.c

It compiled afterwards. Don't forget to put header files in components/zlib/include and c files in components/zlib/