> For the complete documentation index, see [llms.txt](https://www.hardbreak.wiki/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.hardbreak.wiki/hardware-hacking/basics/tools/hardware-tools/open-source-tools.md).

# Open-Source Tools

Open-source hardware tools, like the Bus Pirate and similar devices, are designed for probing, testing, and interacting with hardware systems at a low cost. These tools allow users to interface with various communication protocols, such as UART, SPI, or I2C. Open-source hardware tools are typically much cheaper than commercial devices. This affordability makes them accessible to a wider range of users, from beginners to professional security testers, without sacrificing functionality.