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openmv的VCC、GND接电源以后，GND口怎么接到单片机上？
供电是供电，通信是通信。分开考虑。
供电需要VIN和GND，否则不会工作。
串口通信需要TX，RX，GND，否则通信数据是没有或者错的。
焊一排排针 电池的负极接到排针上 单片机和摄像头模块上上的地也接到排针上就行了吧