OpenTracker+ | Argent Data Systems

By: Argent Data Systems  11-11-2011

The OpenTracker+ is an APRS tracker that can also receive data from other stations and has waypoint output capability. Use the OT1+ to report position, course and speed, time, and altitude when connected to a GPS -- not just from a vehicle, but anything, including a bicycle, weather balloon, or backpack. Or, use the OT1+ to encode and transmit data from a supported weather station. The tracker will also report telemetry from its onboard temperature and voltage sensors, and an external counter input can report a cumulative total of counter events or the number of events since last transmission. The OpenTracker+ replaces the OT1x and OT1m series. The OT1+ added waypoint output capability, increased program space and RAM, and a simplified hardware design. Available as a kit or fully assembled.

The OpenTracker+ SMT is a surface-mount version of the OT1+, with a 24-pin DIP form factor. This board has the same features as the OT1+, except it does not include a built-in temperature sensor or LEDs. Only available assembled.

Major features include:

  • APRS telemetry output
  • Fixed location operation for telemetry with no GPS
  • NMEA waypoint output
  • Dual configuration profiles with flexible selection
  • On-board temperature and voltage sensors
  • Supports 1-wire and Peet Bros WX stations
  • Drive an external relay for radio power control
  • Supports 1200 and 300 baud AFSK operation
  • PSK31 support for PropNet^31 Operation
  • Base91 compressed positions with 1-foot resolution
  • SmartBeaconing™ for adaptive beacon rates
  • Digital event counter, cumulative or since last transmission
  • Free firmware upgrades directly from the website, no special hardware needed
  • Source code released under Modified BSD license


  OpenTracker+ OpenTracker+ SMT
Voltage DC 6.5 to 28V DC 6.5 to 28V unregulated or
5V DC regulated
Modes 1200 bps AFSK (send and receive)
300 bps AFSK, PSK31 (send only)
1200 bps AFSK (send and receive)
300 bps AFSK, PSK31 (send only)
Radio Connector DB9 female (Kantronics pinout) pin header
Serial Connector DB9 male (RS-232 DTE configuration) pin header
Dimensions 2.5" x 1.6" x 0.75" 1.22" x 0.72" x 0.2"(excluding pins)
31mm x 18mm x 5mm
GPS Interface NMEA in/out NMEA in/out




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We are currently expanding our product line to include innovative and low cost voice and data radios for hobbyists and professionals. Our main products are the OpenTracker+ and Tracker2 series of APRS and packet radio devices designed by Scott Miller, N1VG.


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