CatSniffer is a versatile multiprotocol board designed for sniffing, communicating, and attacking IoT devices, featuring support for technologies like LoRa, Sub 1 GHz, and 2.4 GHz. It is a developer-friendly tool that integrates with various software options, allowing users to create custom applications for IoT security research. The project is open-source, with continuous support and updates for multiple board versions.