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This ESP32 core expansion board is built with WROOM-32 integrated module, combining dual-core processing, WiFi and Bluetooth functions in one unit. All common interface pins are fully extended with clear layout, convenient for peripheral connection and secondary development. The onboard optimized power supply and download circuit ensure stable operation and simple program uploading. Compact and practical design, perfectly suitable for embedded development, IoT terminal making, wireless control projects and maker experimental learning.