I ask this because I've been confused by several sketches I've seen that suggest you do not need to ground ESCs, or at least that you do not need to ground ESCs that are not supplying power.
I want to have one ESC supplying power to an Arduino Uno and the remainder simply being controlled. It is unclear to me based on the sketches I've seen whether or not the ESCs connected only for control purposes need to be grounded to the board. All the ESCs will have one power source.
As a follow up, is there a convenient way to connect all the ground wires to the arduino?