From Parts to Packet: Building an APRS MicroModem

By 4x5mg

This blog post documents the author's journey building an APRS micromodem for amateur radio applications. Using an open-source design by LY2EN, the author assembled a cost-effective Terminal Node Controller (TNC) with SMD components, an Arduino Nano, and a JDY-31 Bluetooth module. The construction process included PCB fabrication, careful component soldering, microcontroller programming, and Bluetooth configuration. A custom 3D-printed case protected the completed device. Field testing in Romania showed the device functioned with a Baofeng UV-5R radio, though antenna limitations affected performance. The entire project demonstrates an affordable DIY alternative to commercial APRS trackers.

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Technical Reference/APRS

The title of the main category is APRS and it deals mainly with APRS Projects. iGate and APRS tracking kits. The link to this resource has been on our site since Saturday Mar 15 2025, and it has been followed 27 times. So far no one has rated it yet. Be the first to rate it!
Last updated: 2025-03-15

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