xhc-hbo4 standalone tests

Imortant Note: This only works with 'XTerm'

Use to test button layouts for a USB wireless xhc-hb04 pendant.

xhc-hb04-layout1.demo  -- test with layout1 (16 buttons)

xhc-hb04-layout2.demo  -- test with layout2 (18 buttons)

xhc-hb04.demo  -test with no predefined button layout

(Connect a xhc-hb04 pendant and turn it on to use these programs)
