Flipper Zero Episode 3: Getting Started with GPIO and 3-in-1 Board Setup

GPIO (General Purpose Input/Output) enables Flipper Zero to interface with external modules and sensors through its pin header. The guide covers connecting ESP32, NRF24, and CC1101 modules to expand wireless capabilities, with a focus on a compact 3-in-1 board that combines all three. Using Momentum firmware unlocks additional tools like ESP32 Marauder for Wi-Fi testing, including harmless demonstrations like broadcasting fake network names. The setup provides a foundation for wireless security research and hardware experimentation.