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M5Stack PaperColor
4寸彩色电子墨水屏开发板，ESP32主控带音频I/O，适合DIY智能硬件原型。
4-inch color E-ink dev board with ESP32 and audio I/O Discussion | Link
4寸彩色电子墨水屏开发板，ESP32主控带音频I/O，适合DIY智能硬件原型。
4-inch color E-ink dev board with ESP32 and audio I/O Discussion | Link