In the vein of finger dexterity, I fear it must be very low, otherwise I'd expect use of a small "joystick mouse" rather than (or at least as a supplement to) S

In the vein of finger dexterity, I fear it must be very low, otherwise I'd expect use of a small "joystick mouse" rather than (or at least as a supplement to) SwitchXS and a single-button switch. That said, I've heard of some quadriplegics with basic finger function using morse code-style inputs in various ways. I don't know details, but this[1] popped up in Google. It seems old but potentially interesting. I wonder how much work it would be to put together something like an Arduino-based device that takes morse-like input and simulates a USB or Bluetooth keyboard? [1] http://www.makoa.org/jlubin/morsecode.htm http://www.makoa.org/jlubin/morsecode.htm