Im trying to make a on/off switch for my Imito MX1. Im using a switch normally used for lamps. I googled a pinout picture for micro usb and what i could understand was that the red wire is +5V. But even if i switch this wire off i still have power on my Imito, the only way working is to switch off the signal ground cable(black). Anyone who can explain why this is the wire that needs to be switch off instead of the red wire?