Get KeyUp

Beta Radio Bridge gateway 0.3.0 beta

Download the gateway.

The gateway is the small program that runs next to your radio. It joins a KeyUp room like a person and talks to the radio through a USB interface. The download is free; Radio Bridge itself is $59 a month per bridge. About Radio Bridge

Choose your computer.

  • Windows 10 or 11

    A Windows PC next to the radio. Python 3.10 or newer is needed; the installer looks for it and tells you if it is missing.

    Version 0.3.0 beta · 52 KB

    SHA-256 82dadecc52d4f2362f76e8c014e27e63c3cd7f00a01348e3f33a8dddcd0f3afb

    Download for Windows 10 or 11

  • Raspberry Pi 4 or 5

    Raspberry Pi OS Bookworm or newer. The install script sets up everything under ~/keyup-radio.

    Version 0.3.0 beta · 41 KB

    SHA-256 188d54561e0cbccecae82289a3404e78c1cfcd70e8ad7c00ec7211b264c5f805

    Download for Raspberry Pi 4 or 5

Check a download: on Windows, run Get-FileHash -Algorithm SHA256 <file> in PowerShell. On a Pi or Linux, run sha256sum -c SHA256SUMS.txt in the folder with both files. The numbers must match. All files: SHA256SUMS.txt.

What has been tested.

Tested so far: real radio audio from public scanner channels through the gateway into a room, with the squelch opening and closing on voice. Not yet tested: a radio wired to a USB interface (AIOC, Digirig or CM108), a Raspberry Pi, and talking out to the radio.

So start with a listen-only bridge, and tell us what you find at [email protected]. Listen-only needs no FCC license. Talking out to the radio needs an approved FCC Part 90 (Industrial/Business) license in the United States; GMRS, FRS, MURS, CB and amateur radios stay listen-only. Only bridge a channel you are licensed or authorized to use. See Radio Bridge licenses.

What you need.

  1. A business radio

    A handheld or mobile radio you are licensed or authorized to use, with an audio and push-to-talk connection.

  2. A USB radio interface

    An AIOC (about $25) for handhelds with a 2-pin jack, a Digirig with the cable for your radio, or another CM108-style interface.

  3. A computer next to the radio

    A Windows 10 or 11 PC with Python 3.10 or newer, or a Raspberry Pi 4 or 5. It stays on and online.

  4. KeyUp Crew or Business

    With Radio Bridge added ($59 a month per bridge). The Space owner buys it in the KeyUp web app: open Plans, find Radio Bridge, enter how many bridges and press Add Radio Bridge. It is not sold in the Android app. A computer browser is needed to make the bridge in the dispatch console.

Set up in short.

  1. Make the bridge. The Space owner or an admin opens the dispatch console in a computer browser, picks the Space, opens Radio bridges, presses Add, picks the room and presses Create bridge. Copy the bridge token. It is shown once and starts with krb_. Treat it like a password.
  2. Unzip and install. Windows: unzip to a folder such as C:\KeyUp-Radio and double-click install.bat. Raspberry Pi: tar xzf keyup-radio-bridge-0.3.0-beta-pi.tar.gz, then cd keyup-radio-bridge-0.3.0-beta-pi and bash install-pi.sh, then log out and back in once.
  3. Answer the setup questions. The installer asks for the KeyUp address, the bridge token (it is not shown while you paste), your sound device, how the radio is keyed and your call sign.
  4. Test in order. Device list, key test, test tone, level check and station ID test. Do the transmit tests only on your licensed channel.
  5. Start it. Run start.bat on Windows or ./kr.sh run on a Pi. The console shows the bridge Online. Begin listen-only.

Squelch tip

Keep the radio's own squelch on. The gateway's level squelch is a second gate, not a replacement: an open receiver's hiss is loud enough to pass as talk and keeps the room busy. Set the level about 10 dB above the quiet noise with the levels tool (levels.bat or ./kr.sh levels), and use the radio's carrier line (COS) if your interface has one.

The full steps, wiring, audio levels and fixes are in the Help article Set up a radio bridge (Beta), and in PILOT_SETUP_GUIDE.md inside each download.

No Radio Bridge yet?

The Space owner buys it in the KeyUp web app: open Plans, find Radio Bridge, enter how many bridges and press Add Radio Bridge. It is not sold in the Android app. Want to try it first? Ask for a free 30-day start: up to five teams at a time, nothing is charged, and it ends by itself. To ask, write to [email protected].

Radio Bridge is not an emergency or public safety system. You are responsible for your radio license and for following its rules. We can’t give legal advice.

See pricing About Radio Bridge