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Features & Specifications | Openterface KeyMod Series

Current Status

KeyMod is in active development with a public beta available for Android. Subscribe on the product page to stay updated on launch notifications.

Note: Features, specifications, and design are still subject to change as development continues.

Product Variants

  • 2-in-1 Connector Version — Combined USB A + USB C plug design for broad compatibility with laptops, tablets, and phones
  • USB C Version — Dedicated USB C plug for modern devices and clean cable management

Core Features

Phone as Keyboard and Trackpad

KeyMod turns your phone into a portable keyboard and trackpad console. Use it when a full keyboard and mouse are not available, or when you want a faster workflow than switching devices. Ideal for outdoor display computers, LED signage players, kiosks, smart TVs, and set top boxes.

Dual Connection: USB + Bluetooth

  • USB — Plug-and-play wired connection for reliable, low-latency input
  • Bluetooth — Cable-free setup when the scenario allows; keep your setup light and portable

KeyMod is built for practical everyday local device control, not as a remote desktop replacement.

Open Source Mobile App

With our open source mobile app, you can:

  • Keyboard & Mouse (Basic) — Full-screen keyboard with long-press repeat, key preview, and numpad
  • Keyboard & Mouse Pro — Composite layout with Shortcut Hub strips, split keyboard, and IME
  • Presentation mode — Slide remote control with timer for Google Slides and other apps
  • Gamepad — Virtual controller with customizable preset layouts, multi-touchpad support
  • Shortcut Hub — Profile-based keyboard shortcuts for creative and dev tools (Blender, KiCAD, Photoshop, VS Code), with create, import, and export
  • Macros — Programmable key sequences with delays
  • Voice input — Speech-to-keyboard with AI (Whisper API)

The KeyMod controller app focuses on Android and iPadOS. We are also expanding desktop control with Windows and macOS software in our broader Openterface ecosystem.

True Hardware HID

Built on the proven HID core from Openterface Mini-KVM. Hardware-based keyboard and mouse emulation—no software installation required on the target device.

Open Source

KeyMod is open hardware and open software. We will publish schematics, PCB files, firmware, software, and BOM as the project evolves. Join our community to contribute and stay updated.

Technical Specifications

Connectivity

  • USB: USB C port (2-in-1 variant: USB A + USB C combined plug)
  • Bluetooth: HID keyboard and mouse
  • Target: No software installation required

Key Hardware

  • CH9329 HID emulator chip
  • Bluetooth module
  • USB C port
  • MCU
  • Programmable button(s)

Input Features

  • Full keyboard and mouse emulation (HID)
  • Custom input profiles (Basic and Pro tiers)
  • Macros and hotkeys
  • Shortcut Hub with app-specific profiles
  • Gamepad with preset-based layouts (schema v7)
  • Presentation controls with slide timer
  • Voice-to-keyboard with AI