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Packet decoder

The packet decoder shows every field a raw APRS line carries. It is for operators who want to read a packet field by field; it decodes in the browser, with no network.

What it does

You paste a TNC2 monitor line or an APRS-IS line. The decoder answers with a one-line summary, and its panel shows:

  • the sender, the destination and the path;
  • how the line arrived: heard on RF, or entered over APRS-IS, and through which IGate;
  • the packet type;
  • every APRS field: position (plain, compressed or Mic-E), course, speed, altitude, objects and items, messages with acknowledgements, bulletins, status, weather and telemetry.

It runs the same parser the APRScaching gateway ingests with: the MIT APRS library at the commit lib.lock pins.

Use it

  1. In Tools → Decode, pick APRS packet.

  2. Paste a line, or select Use a sample:

    OE8APR-9>APRS,WIDE1-1,qAR,OE8XXX:!4704.41N/01526.27E>088/036/A=001234Mobile

  3. Select Decode.

In the sample, qAR,OE8XXX is the q-construct: the station OE8XXX heard the packet on RF and passed it to APRS-IS.

Permissions

Permission Why
decoder Adds the APRS packet decoder
panel Shows the decoded fields

Version and tool API
Manifest name packet-decoder
Version 1.1.0
Tool API 1.0, the minimum it needs
Author OE8APR
Shows on web
Commands The operator's alone
Licence MIT
In the project registry Listed, as version 1.1.0
Source tools/packet-decoder/

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