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Can I use an external power supply and still communicate with nRF52840 over USB Serial?

Hello everyone,

I want to measure current of the whole board, I follow the instruction of nRF52840 DK , which suggest not to use the USB connector to power the board.

So I decide to use an external power supply. But I need the board to communicate with my computer through USB Serial(UART).

My question is :

Can I use an external power supply and still communicate with nRF52840 over USB Serial?

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