Compatibility (Important) - Only suitable for the 38-pin narrow version ESP32 boards without mounting holes. Not compatible with other ESP32 versions. Key benefits and features - GPIO expansion to two access points - Expands one ESP32 GPIO pin to two connection points, making it easier to wire multiple components that respond to the same signal and to reuse pins in smart home projects. - Provides a convenient breadboard friendly alternative for rapid prototyping. - Reliable, double-layer PCB construction - Double-layer PCB with one pin wired on both sides for each connection. - Designed to improve circuit stability and signal reliability, reducing risk of poor contacts and unstable transmission. - Flexible connection options - Two connection types available: Pin Header and Screw Terminal. - Choose the version that best fits your wiring style and project needs. Use scenarios - Smart home prototyping and testing - Use a single ESP32 GPIO to drive two indicators or modules, while preserving pins for future expansion. This simplifies wiring in compact smart home setups. - Breadboard friendly prototyping - Branch a GPIO signal to two convenient points on a breadboard, making it easier to build and test circuits without complex junctions or jumper routing. - Quick wiring for modular projects - When creating modular sensor or actuator blocks, this board provides two access points for the same GPIO, aiding organization and layout while keeping pin usage efficient. Technical notes - Compatible only with the 38-pin narrow ESP32 variant without mounting holes. - Double-layer design emphasizes reliability and stable signal transmission. - Two connection options (Pin Header or Screw Terminal) to suit different assembly preferences.