This project offers a simplified compressor that produces Gzip-compatible output with small resources for microcontrollers and edge computers. He uses the very basic LZ77 compression algorithm and static Deflate Huffman tree encoding to compress / decompress data into Gzip files.

He is based on a modified uzlib library to create a minimalist GNU GZIP Software clone to compress data into Gzip files under the FatFs File System and microcontrollers.

• Save energy and time when sending data.
• Data takes up less space, as a compression ratio can reach 50:1, but a ratio between 2:1 and 5:1 is common.
• Encapsulate data.
• Gzip file compatible with Multi-OS.

This example is written for an Arm Cortex-M0 processor of the Stm32 family with the FatFs file system (to simplify playing with files on SDcard or eMMC, for more information , you can see STM32-FatFs-FreeRtos ).

We compressed the data from 159 bytes to 84 bytes, and by adding additional information to build the structure of a GZIP file, we got 102 bytes.

https://github.com/pfalcon/uzlib

https://www.rfc-editor.org/rfc/rfc1952

https://docs.fileformat.com/compression/gz

https://www.gnu.org/software/gzip

Creative Commons Zero v1.0 Universal