Using just a webcam, this program allows the uArm Metal to mirror the movement of your hand. The state of the pump is also controlled by the closing and opening of your hand.
Open hand -> pump off
Closed hand -> pump on
https://drive.google.com/file/d/12o6z9JN9lfFadLSnMwN3iXkRCTX_Xhpb/view?usp=sharing