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Features & Specifications | Openterface KeyMod Series

Pre-Launch Status

KeyMod is currently in pre-launch development. We're refining the hardware and software. Subscribe on the product page to stay updated on progress and 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:

  • Build custom input profiles
  • Launch macros and configure hotkeys
  • Extend to advanced modes: keypad and gamepad
  • Create workflow shortcuts

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.

Virtual Game Controller

KeyMod can act as a virtual game controller with familiar layouts:

  • Xbox layout
  • PlayStation layout
  • NES layout

Programmable Hardware Buttons

KeyMod includes programmable hardware buttons for on-device actions like quick triggers and simple macro-style workflows. This capability is still experimental and will be refined through prototyping, testing, and community feedback.

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
  • Macros and hotkeys
  • Keypad and gamepad modes
  • Virtual game controller layouts (Xbox, PlayStation, NES)