Unishox2

Abstract

1. Introduction

Unishox2 will still be supported for cases where space for storing static dictionaries is an issue.

In general compression utilities such as zip, gzip do not compress short strings well and often expand them. They also use lots of memory which makes them unusable in constrained environments like Arduino. So Unishox algorithm was developed for individually compressing (and decompressing) short strings.

The contenders for Unishox are Smaz, Shoco, Unicode.org's SCSU and BOCU (implementations here and here) and AIMCS (Implementation here).

2. Objective

Compression for Unicode short strings (works on arduino)

This project demonstrates how C, Arduino can be applied to a real-world Internet of Things (IoT) problem.

4. Technology Stack

5. System Requirements

General requirements for this technology stack — check the README for exact versions.

• Arduino IDE / PlatformIO or a C compiler (gcc)
• Target board where applicable
• Git (to clone the repository)

6. Installation & Setup

git clone https://github.com/siara-cc/Unishox2.git
cd Unishox2

./test_unishox2 "Hello World"

./test_unishox2 -c <input_file> <compressed_file>
./test_unishox2 -d <compressed_file> <decompressed_file>

Full setup instructions are in the project README.

7. Future Enhancements

Suggested extensions you can add to make this your own project.

• Add a mobile dashboard using Blynk or Firebase
• Store readings in a cloud database for history charts
• Add alerts via SMS / Telegram when thresholds are crossed

8. Viva / Review Questions

Common questions examiners ask for projects in this domain.

1. Which microcontroller / board and sensors are used and why?
2. How does the device send data (Wi-Fi, MQTT, HTTP, Bluetooth)?
3. Where is the sensor data stored and visualised?
4. How is power consumption managed?
5. How would you secure the device and its communication?

9. Source Code & License

This project is developed by siara-cc and published on GitHub under the Apache License 2.0. Please follow the license terms and credit the original author when you use or modify this code.