Hardware

Hardware output routes your input through a dedicated device — a Teensy 4.x microcontroller — so your scripts run on the device and leave as standard USB HID at up to 8,000 Hz, for deterministic timing and isolation from the host OS. Software mode needs none of this; How it works covers the software-vs-hardware split.

This page flashes a board and activates it.

What you need

• A Teensy 4.0 or 4.1 from PJRC, Amazon, or SparkFun. No soldering or wiring — just a USB cable.
• A Rebind license. You own the device; it keeps working without ongoing payment.
• The Rebind app, on the latest version — re-run the install command in the quickstart to update.

A pre-built device — pre-flashed, with a case and cable — is coming soon.

Flash your device

Plug the board in, open the Rebind app, and click the terminal icon in the lower-right corner. List connected devices — each is shown with its index:

$ devices list
  [0] bootloader  Teensy 4.1
    vid:pid    16c0:0478
    firmware   none

Flash the device at that index:

$ devices flash 0

The board reboots into the Rebind firmware once flashing completes. Re-run devices flash <#> any time to update a board. (The command is devices; device works too as an alias.)

Activate

Your Rebind license key is emailed when you purchase. Activation ties the key to the device and is done once per board:

$ activate REBIND-XXXX-XXXX-XXXX
license activated
status    active

(On failure the command prints activation failed: <message> instead.) The license then lives on the hardware and works offline.

Verify

$ devices info
active device:

  id         a1b2c3d4e5f6
  board      Teensy 4.1
  firmware   1.4.0
  bus        1-2
  vid:pid    16c0:0486

  interfaces:
    0  keyboard   usage_page=0x01  usage=0x06
    1  mouse      usage_page=0x01  usage=0x02
    2  rawhid     usage_page=0xFF00 usage=0x01

If devices info shows your board with its firmware version, hardware output is live. Run a script — its output now comes from the device.