A simple simulator for the VISCA protocol over a serial (COM) port. The orange box behaves like the camera view: it moves when pan/tilt commands arrive and resizes on zoom.
Shows every received packet as hex with the decoded name. Unknown packets are red.
No serial device handy? Click into the page and use ←↑↓→ to pan/tilt, +/− to zoom and P to toggle power. This injects the same VISCA packets locally.