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A battery is an electrical power source which is often portable.

-1 votes

Will Nodemcu support 4AAA

You don't have to connect any UART. This is done through USB serial communication. So, just copy the uf2 file to pico. Let it reboot. Then you should see a ttyS* or ttyACM* device shows up in /dev/ if …
adeel arshad's user avatar