- Compatibility: This expansion board is fully compatible with the ESP8266 ESP-12E, ensuring seamless integration into your projects. - Reliable Double Layer PCB: Constructed with a two-layer PCB design, this board features pins wired on both sides. This configuration enhances circuit stability and reliability, eliminating issues with poor contact and unstable signal transmission. - Extended GPIO Functionality: The board extends a GPIO pin from your development board, making it easier to reuse pins for larger projects. This feature is ideal for developers working on complex applications that require additional GPIO support. - Versatile Connection Options: Choose between a pin header or a screw terminal for connections, allowing you to select the method that best suits your project needs. Use Cases: 1. IoT Projects: Ideal for Internet of Things applications where multiple sensors or modules need to be connected without sacrificing GPIO availability. 2. Prototyping: Perfect for rapid prototyping, enabling quick adjustments and expansions of your circuit design without the hassle of rewiring. 3. Educational Purposes: A great tool for students and hobbyists learning about electronics and programming, providing hands-on experience with GPIO management and circuit stability. This expansion board is designed to enhance your ESP8266 ESP-12E projects, providing reliability, flexibility, and ease of use in a compact form.