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OctoPrint – power sent via USB from RaspberryPi to Ender 3 Pro – ‘low voltage detected’

When I connected my Ender 3 Pro to my RaspberryPi running OctoPrint this would turn on the display (and the board?) of the Ender 3 Pro printer – the printer itself is turned off. OctoPrint would also display a warning, that the RaspberryPi is detecting low voltage. That is not ideal.

How to stop sending power through USB? 

Multiple ways of doing it:

tbh, I chose option 1: fast, no fiddling around, was done in 5 seconds and problem is solved.

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