I am controlling an IRobot Create 2 with a raspberry pi, which I am powering with one of these:
(I know, I know, I should have just gotten power from the battery thats already in the roomba)
Anyways. I am trying to read electric current values flowing through the roomba as it cleans. I should be getting negative values (which I did previous to using the battery). My code was working, although I know that doesn't mean much.
After much thought, I was wondering if maybe the roomba is drawing power through the serial port from the raspberry pi, giving it a slight charge even though it is not on the charger.
Is this possible, and is there a way to confirm or deny my suspicions?
Any help is appreciated.