OpenTracker+ is a simple and low-cost amateur radio data communication encoding device that can generate AX.25 packets based on the APRS™ protocol at two speeds: 1200bps or 300bps. It can also serve as a text beacon in PSK31 communication mode. It can be connected to a GPS receiver to report position, heading, speed, time, and altitude, as well as encode and transmit data from compatible weather stations. It can also report data from its on-board temperature and voltage sensors, and external counter inputs can be used for event accumulation. With its scalability and ease of reprogramming, the device can adapt to a variety of tasks.
OpenTracker+ is a low‑cost amateur radio data‑communication device that can generate APRS AX.25 packets at 1200 bps or 300 bps and act as a PSK31 beacon. It can report GPS position, heading, speed, altitude, as well as temperature and voltage sensor data, and supports external counter inputs.
The manual covers kit assembly, serial connector pin definitions, configuration software usage, firmware updates, weather‑station and telemetry operation, beacon settings, power options, LED status indicators, and troubleshooting procedures. This manual is written in Chinese.
| Power supply range | 6.7 V to 28 V DC |
|---|---|
| Maximum measured voltage | 18.5 V |
| Supported data rates | 1200 bps or 300 bps |
| Protocol | APRS AX.25 |
| Default configuration baud rate | 115200 baud |
OpenTracker+ can be powered from 6.7 V up to 28 V DC, and the highest voltage it reports is 18.5 V.
The device supports two APRS data rates: 1200 bps and 300 bps.
Use a standard null‑modem (crossover) cable on the DB9 connector and run the Windows configuration program; the program defaults to 115200 baud.
A fast green flash means the channel is currently in use.