USB shielded Power blocker cable (about 18CM long) the best adapter for use with your OctoPrint setup. This adapter is designed specifically for 3D printers used with OctoPrint. It prevents the 5V from your Pi or PC from keeping the printer LCD on when your printer is off. It can also correct issues with communications for some printers.

Its best practice to use a cable like this when connecting peripherals that have their own power to your Raspberry Pi or PC. For a devices like 3d Printers, it is essential to good communications. It connects ground, data+ and data- but not the 5v line. Thus isolating the positive power sources and giving a common ground point. It is shielded to keep out any noise your printer or other electronics might produce. Be sure to use it with a shielded cable.

Why use this instead of alternative Power block modules?

• No bulky block sticking out of your PC/Pi.
• It does not get in the way of other ports.
• Works like a small extension to your existing standard cable.
• Its Shielded.

Other products that do this are typically ridged and stick out in a way that is not stable or reliable. They block other ports and tend to make it hard to mount your device where you want. This is a small extension cable. Allowing for easy cable routing. It can replace your cable or be a small extension of your existing cable run.