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APRS-IS Connection Guide

APRS-IS (APRS Internet System) allows you to send and receive APRS messages over the internet, connecting you to the worldwide APRS network without requiring RF equipment.

Important: APRS-IS is receive-only unless you have a verified amateur radio license. Messages sent via APRS-IS will reach RF-gated stations worldwide.

Configuration Settings

Setting Value
Server rotate.aprs2.net
Port 14580
Filter r/LAT/LON/100

Step-by-Step Setup

  1. 1. Open Connection Settings

    Navigate to Settings → Connection → APRS-IS

  2. 2. Enter Server Details

    • Server: rotate.aprs2.net
    • Port: 14580

  3. 3. Configure Your Filter

    The filter determines what traffic you receive. Common filter options:

    • r/LAT/LON/100 - Stations within 100km of your location
    • b/N0CALL* - Traffic from specific callsigns
    • g/N0CALL - Messages addressed to you

  4. 4. Enter Your Passcode

    To transmit messages, you need an APRS-IS passcode. This is calculated from your callsign.

    Your passcode is automatically calculated when you enter your callsign in the app settings.

  5. 5. Connect

    Tap Connect to establish your APRS-IS connection. You should see connection status change to "Connected" within a few seconds.

Regional Servers

For better performance, you can connect to a regional server instead of the rotating server:

North America

noam.aprs2.net

Europe

euro.aprs2.net

Asia

asia.aprs2.net

Oceania

aunz.aprs2.net

Troubleshooting

  • Connection refused: Check that port 14580 is not blocked by your network/firewall
  • Authentication failed: Verify your callsign and passcode are correct
  • Not receiving traffic: Check your filter settings - you may need to widen the range

Still having issues? Submit a support ticket