Benlink Radio Guide
Premium Feature: Benlink radio connections require an APRS Chat Premium subscription.
Connect APRS Chat directly to a compatible Benlink radio for RF APRS communication over Bluetooth Low Energy (BLE). No TNC required — the radio handles packet encoding and decoding natively.
What is Benlink?
Benlink is a BLE protocol used by several amateur radio manufacturers that allows smartphones to control the radio and exchange APRS data directly over RF. Unlike a traditional TNC setup, Benlink-capable radios handle all the AX.25 packet framing internally — APRS Chat simply sends and receives message content over the BLE connection.
This means you can operate APRS on RF with just your phone and a compatible radio — no computer, no TNC, no internet required.
Supported Radios
APRS Chat supports the following Benlink-compatible radios:
Dual-band mobile transceiver with built-in APRS and Bluetooth. Full-featured with GPS and a large display. Excellent choice for mobile APRS.
Handheld transceiver with APRS and Bluetooth connectivity. Compact and portable, ideal for hiking, events, and portable APRS.
Mobile transceiver similar to the VR-N7600. Supports Benlink BLE for APRS data.
Handheld with Benlink BLE protocol support. Should work but has not been extensively tested by the development team. Community reports welcome.
GMRS radio with Benlink protocol. Note: GMRS operation requires a separate GMRS license and APRS is typically used on amateur radio frequencies.
Budget-friendly handheld with Benlink BLE support. Should work but not extensively tested.
Setup Instructions
Step 1: Pair Your Radio
- Turn on your Benlink radio and ensure Bluetooth is enabled on it (refer to your radio's manual)
- On your phone, go to Settings > Bluetooth
- Scan for devices and tap your radio's name (e.g., "VR-N7600" or "UV-Pro")
- Accept the pairing request on both devices
Important: Always pair in your phone's system Bluetooth settings first. APRS Chat will only show devices that have been previously paired.
Step 2: Configure APRS Chat
- Open APRS Chat and go to Settings
- Under Connection Type, select "Benlink Radio"
- In the Bluetooth device picker, select your radio
Benlink-compatible radios are automatically detected and shown at the top of the list with a radio icon.
- Tap Save to connect
Step 3: Verify Connection
Once connected, APRS Chat will show a green connection indicator. The app automatically:
- Queries the radio for device info (model, firmware version)
- Verifies the radio is powered on and ready
- Registers for incoming data notifications
- Begins monitoring radio status
You can now send and receive APRS messages directly over RF!
How It Works
When you send a message in APRS Chat with a Benlink connection:
- APRS Chat encodes your message as an AX.25/APRS packet
- The packet is sent over BLE to your radio as TNC data fragments
- Your radio transmits the packet over RF on the configured APRS frequency
- Nearby digipeaters and IGates relay your packet to the wider APRS network
Incoming packets work in reverse — your radio receives RF packets and relays them to APRS Chat over BLE.
Radio Control Features
Beyond basic APRS messaging, APRS Chat can control certain aspects of your Benlink radio:
- Channel management: View and edit radio channels (frequency, CTCSS/DCS tones, power, bandwidth)
- Radio status: Monitor current frequency, signal, and power-on state
- Beacon settings: Configure the radio's built-in APRS beacon parameters
- Tune to Repeater: Use the Repeater Finder feature to automatically program a repeater into your radio with the correct frequency offset and tone
Troubleshooting
Radio not appearing in device list
- Ensure the radio is paired in your phone's system Bluetooth settings
- Make sure the radio's Bluetooth is enabled
- Try turning the radio off and on again
- On some radios, you may need to enable "BLE" mode specifically (not classic Bluetooth)
Connection drops or fails to connect
- Only one device can be connected to the radio's BLE at a time. Disconnect any other apps (like the manufacturer's app)
- Move your phone closer to the radio (BLE range is typically 10–30 feet)
- If you see repeated failures, try "forgetting" the device in Bluetooth settings and re-pairing
- Restart the APRS Chat app after re-pairing
Connected but not receiving messages
- Verify your radio is tuned to an active APRS frequency (e.g., 144.390 MHz in North America)
- Check that the radio volume is not muted (some radios disable data when muted)
- Ensure squelch is set appropriately — too tight and weak signals won't trigger decoding
- Try transmitting a beacon and checking if it appears on aprs.fi
"Bond error" or connection rejected
- Go to your phone's Bluetooth settings
- Tap the gear/info icon next to the radio's name
- Select "Forget" or "Unpair"
- Re-pair the device and try connecting again in APRS Chat
Benlink vs. Bluetooth TNC
Not sure which connection type to use? Here's a comparison:
| Feature | Benlink Radio | Bluetooth TNC |
|---|---|---|
| Equipment needed | Phone + compatible radio | Phone + TNC + any radio |
| Connection type | Bluetooth Low Energy (BLE) | Classic Bluetooth (SPP) |
| Radio control | Yes — frequency, channels, beacon | No — TNC only |
| Battery usage | Lower (BLE is efficient) | Higher (classic BT) |
| Radio compatibility | Limited to Benlink radios | Any radio + KISS TNC |
| Portability | Excellent — all-in-one | Good — extra TNC device needed |
Platform Support
Benlink radio connections are available on both Android and iOS. The iOS version includes additional radio control features including a channel editor and radio settings dashboard.