ESP32 Forum

Hi everyone,

I'm working on my first esp32 project with a NodeMCU at the moment. In my finalized prototype, the NodeMCU will be powered via the 5V Vin pin. However, I want to connect a Usb extension cable to the Usb port, to make it accessible to the outside of my prototype, so I dont have to disassemble the housing every time I want to debug or upload new code. This would mean that the Vin pin stays connected when I connect to the Usb port. Would this cause any problem?
Thanks for your help!

Anton

You'd have to check the schematic of the particular board ('NodeMCU' is quite generic by now) but most of them have a diode to prevent backflow, meaning this would work OK.