NodeMCU Usb connection while Vin at 5V

[AntonG99]

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

[ESP_Sprite]

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.