Drop CTRL Auto Lock on USB Switch

This cross-platform project locks keyboard input when a Drop CTRL V1 keyboard is reconnected via USB switch.

🧠 Use case: When switching your keyboard between a work and home computer, this script blocks all input until you press a specific key (Pause or Scroll Lock) or wait 30 seconds.

🖥 Supported Platforms

• ✅ Windows 10/11
• ✅ macOS (via Hammerspoon)

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🔐 Behavior

• Locks input when the Drop CTRL is plugged in.
• Unlocks on specific key press (Pause on Windows, F19/Scroll Lock on macOS).
• Or auto-unlocks after 30 seconds.
• Detects keyboard reconnect via USB (not based on system idle or app focus).

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📂 Folder Contents

windows/

• lock_until_layer_key_once.py — Python script that uses pywinusb and keyboard modules.
• task_scheduler_setup.md — Instructions for setting up as a background task using Task Scheduler.

macos/

• init.lua — Hammerspoon config file.
• install_instructions.md — Instructions for configuring Hammerspoon and Karabiner-Elements.

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🚀 Setup Instructions

See individual platform folders for setup steps.

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🧪 Compatibility

• Designed specifically for Drop CTRL V1 keyboard:
  • Vendor ID: 0x04D8
  • Product ID: 0xEED2

You can modify the script to support other keyboards by changing those values.

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📄 License

MIT License — use freely and modify as needed.