nRF52840 Steam Controller 2 puck reimplementation — WebUSB. Chrome/Edge only.
If nothing appears in the device picker, the copycat may be busy (quit any app holding it) or needs a replug.
Switching reboots the copycat and re-enumerates USB (~2 s). The RF link reconnects automatically. Desktop keyboard+mouse (lizard) is automatic in Steam mode whenever Steam is closed — no separate mode.
Microseconds between RF polls (×100). Lower = poll harder = more fresh reports/s (peaks ~60/s near 700 µs). Too aggressive can collapse the reply rate during heavy trackpad use — watch the “New reports” stat and trackpad feel as you tune.
Right-pad cursor in Steam-mode lizard (Steam closed) and in Xbox mode. Sensitivity is a divisor — lower = faster pointer. Glide = how long the cursor coasts after a flick.
Interpolation alpha. 100 = off (raw 46 Hz capsense), lower = smoother but slightly laggier.
Back-paddle → button, applied in Xbox & Switch modes.