we are trying to zip the data which we received from sensor and send to the server, i want know any data compression library are there for STM322f423 ?

[Shreyas H]

we are design the iot based environmental parameter data logger where the data received from the sensor & same data should be zipped and transmit to server , am struggling to do zipping the data , please suggest any library which will do zipping data.

[S.Ma]

As I recall, Zip uses significant RAM for dictionary. Better stay with data in binary (and not ascii text) form and find out a way to compress it. For example, store the information with one absolute followed by relative more compact format. (store the delta)

Zip will be difficult to implement I guess.

Otherwise, few years back, bumped into string compressor here:

lz-string

=========

LZ-based compression algorithm for JavaScript

## Install via [npm](https://npmjs.org/)

```shell

$ npm install lz-string

```

## Home page

Home page for this program with examples, documentation and a live demo: http://pieroxy.net/blog/pages/lz-string/index.html

[Tesla DeLorean]

Problem is ZIP is ubiquitous

I can do CAB files

[Tesla DeLorean]

zlib and more generically deflate and inflate should be usable.

miniz

[James Murray]

Although far less efficient than newer compression algorithms, you may want to consider ncompress. The source is public domain. I have adapted it successfully for use on a microcontroller with only 64K RAM.

http://ncompress.sourceforge.net/

James