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:
- Put tape on the 5V pin: https://community.octoprint.org/t/put-tape-on-the-5v-pin-why-and-how/13574 or https://community.octoprint.org/t/led-panel-stays-lit-when-i-turn-off-printer/5707/9
- Turn USB power off via uhubctl: https://community.octoprint.org/t/usb-power-control-via-octoprint/1535/11?u=outsourcedguru
- Cut the 5V wire in the USB cable
tbh, I chose option 1: fast, no fiddling around, was done in 5 seconds and problem is solved.