The ESP32 RF Spectrum Scanner is an open-source toolkit for real-time analysis and monitoring of the crowded 2.4 GHz ISM band. It provides a cost-effective solution for network administrators, security researchers, and wireless engineers to visualize RF traffic through a dynamic, self-hosted web interface. Its standout feature is audio sonification, a novel process that translates complex RF data into a structured soundscape. This allows for the intuitive identification of signal types, including frequency-hopping patterns from protocols like Bluetooth and Zigbee, through hearing alone. By combining accessible hardware with a sophisticated browser-based interface, this project democratizes RF analysis, creating an invaluable tool for debugging, interference hunting, and educational purposes.