Expansion board for ESP32 (38PIN narrow version, no mounting holes) Key features and benefits - Compatibility: Designed only for the 38PIN narrow version ESP32 without mounting holes. Not compatible with other versions. - Two connector options: Choose pin header or screw terminal to match your wiring preference and project needs. - Double-layer PCB design: One pin is wired on both sides, improving circuit stability and reducing bad contacts and unstable signal transmission. - GPIO extension to breadboard: Extends a GPIO pin from the ESP32 development board to a breadboard, making it easy to reuse pins in various projects. Applications and use scenarios - Breadboard prototyping: Connect sensors, LEDs, and other modules to ESP32 GPIOs on a breadboard for quick testing and iteration. - Educational projects and workshops: Simple, solder-free GPIO access enables students to explore wiring and circuitry safely and efficiently. - Development and debugging: Map ESP32 GPIOs to external hardware for signal verification, testing, and rapid development cycles. Notes - Without mounting holes, this board is tailored for the specified ESP32 38PIN narrow version and is not suitable for other ESP32 variants.