How to run a virtual plotter in software

In virtual mode, a Plotter behaves as though it had hardware attached, but doesn’t actually attempt to set pulse-widths on the servo motors.

If a Plotter is unable to connect to pigpiod to communicate with the hardware, it will revert to virtual mode automatically.

It’s also possible to force a plotter to run in virtual mode, by instantiating it with the virtual argument, for example:

bg = BrachioGraph(virtual=True)

Whether or not the plotter runs in virtual mode, it’s also possible to use Python’s turtle graphics to run a graphical turtle on-screen to represent the physical behaviour, with the turtle argument:

bg = BrachioGraph(turtle=True)