For quick keyboard tests, I typically use Kyma Control on the iPad. That gives you a choice of multi-touch (for polyphony), continuous vs discrete pitch, rounded on key-down, "strum" modes and choice of standard keyboard or Tonnetz layout. (Also good for quick tests of pen & tablet-like controls, a multi-touch VCS, multigrid, and accelerometer controllers).
Another possibility is the free macOS app Keyboard Keyboard which could control the Pacamara via USB-C.