SpenWindows

S Pen input bridge for Windows. Maps S Pen events from a Samsung tablet to the Windows mouse.

Requirements

• Windows with Python
• Android adb in path
• NDK if you want use it wirelessly

Files

• spen_windows.py — Main injector that moves the Windows cursor.
• spen_adb.py — Reads and parses S Pen events from the tablet via ADB.
• spen_listener.py — UDP listener for events emitted by the spen_daemon on the tablet.
• spen_daemon.c — Small C daemon (for Android) that reads the tablet event device and sends events over UDP.
• launch.pwa.py — Launches the fullscreen blackscreen PWA in Chrome on the tablet and lowers brightness to 0%.
• build-push-run-spen-daemon.ps1 — Helper to build the daemon, push it to the tablet, and run it.

Quick usage

Run with ADB (USB) — auto-detect S Pen device:

python spen_windows.py

If auto-detection fails, discover the event device on the tablet and supply it:

# On your PC
python spen_windows.py --event 4

# Or to list devices from the tablet (useful to find correct event number)
python spen_adb.py --list

Run wirelessly (daemon running on tablet; see next section):

python spen_windows.py --wireless

Common useful options:

• --swap-axes : Swap tablet X/Y axes.
• --invert-x / --invert-y : Invert axes before mapping.
• --scale <factor> : Scale the active area (e.g. --scale 3.0 makes the active area 1/3
• --offset-x <val> / --offset-y <val> : Offset the active area (0.0–1.0).
• --deadzone <val> : Pressure threshold to register a click (default 0.005).
• --verbose or -v : Print more event information.

Example (wireless with axis tweaks):

python spen_windows.py --wireless --swap-axes --invert-y --scale 3.1

After the daemon is running on the tablet, run spen_windows.py --wireless on the PC.

Blackscreen PWA launcher

If you want a simple fullscreen blackscreen setup on the tablet, run:

python launch.pwa.py

Troubleshooting

• Idk bru, check if adb is running and dev options are enabled.

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