NodeMCU VIN Power with USB Comms

[Paul_B]

@MadMacks

When I want to update code I need to disconnect the project box from the 12V DC power source

Why?

@MadMacks

I believe it’s risky (or flat-out dangerous) to have NodeMCU connected to power using the VIN pin and USB port simultaneously, even if there is a diode intended to prevent power feedback.

Why do you believe that?