What is the Pi-Star Project:

Pi-Star is a software solution used in amateur radio, specifically designed for digital voice hotspots and repeaters. It supports various digital modes such as DMR (Digital Mobile Radio), D-STAR (Digital Smart Technologies for Amateur Radio), System Fusion (C4FM), and P25 (Project 25). The new open source digital mode M17 is being implemented in a soon to be released update.

Pi-Star provides an easy-to-use interface and is often used with Raspberry Pi hardware, although it can run on other platforms as well. The software enables hams (amateur radio operators) to connect their radios to internet-linked networks, extending their communication capabilities far beyond local coverage.