APRS Project Schematics and Construction Guides
Find schematics, software, and instructions for building APRS trackers, iGates, digipeaters, and weather station interfaces.
APRS, the Automatic Packet Reporting System, allows ham radio operators to transmit real-time position, weather, and telemetry data over amateur radio frequencies. Hams use APRS for tracking vehicles, reporting local weather conditions, and sending short messages, often integrating GPS receivers with their transceivers. This digital mode operates primarily on VHF bands, but can also be found on HF for long-distance tracking.
This category provides resources for building and configuring APRS stations, including DIY tracker projects like the Trackuino for Arduino and the OZ4HZ tracker. Operators can find guides on setting up APRS I-Gates and digipeaters, such as the APRS4R Digipeater configuration notes, to extend network coverage. There are also specialized projects like the PSK63 APRS Transmit Beacon for HF operation and interfaces for weather stations to feed data into the APRS network.
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A near-copy of the PIC-E running the GPS-2E firmware -
APRS4R Digipeater configuration notes by K6DBG -
The 4Hz tracker - APRS tracker with AT89C4051, now also with 5W transmitter onboard. -
PSK63 APRS mobile tracker for HF, FreeTrak63 - APRS PSK63 Tracker -
An open source Automatic Packet Reporting System tracker based on Arduino by Javier Martin -
A data converter for the Tandy WM918 weather station. The Weather APRS data converter project aims to create an interface to interpret data from the popular Tandy WM918 weather station and format it for transmission over packet radio. The South East Radio Group in South Australia has established a network of these weather stations to provide amateurs with regularly updated weather data. However, the WM918's data output is not structured for APRS weather reporting. This project describes a solution using a PIC microcontroller to convert the WM918 data into APRS-compatible strings that can be sent as beacons or connected packets. The interface offers features like position/positionless data, connected/beacon modes, and metric/imperial units. The goal is to create an interconnected weather reporting system for amateur radio operators -
Mint tin transformed into a switched 9v battery to Anderson PowerPole -
**APRS TX I-Gate with APRX and the Universal Radio Controller** This project explores the creation of an APRS TX I-Gate to improve message delivery in amateur radio communications. Initial experiments involved configuring a picoAPRS v4 and later a G1LRO Universal Radio Controller (URC) with a Quansheng UV-K5 as digipeaters. While both setups successfully retransmitted signals, they failed to receive incoming APRS messages. To address this, a Raspberry Pi Zero running Debian and APRX-2.9 was repurposed to provide network connectivity, transforming the URC into an effective TX I-Gate for seamless APRS message handling. -
APRSTT translate-O-Matic convert online your callsign in DTMF -
An Arduino APRS project based on the real time OS BeRTOS -
AVRS info by WB4APR -
Super Simple APRS Position Reporter. This project idea has been in response to the more hardware heavy Raspberry Pi projects that involve extra TNC hardware, additional sound cards, and custom cabling. This APRS position reporter is done using a Raspberry Pi B+, USB GPS receiver, Baofeng UV-5R, and a mono 3.5mm audio cable between the Pi and HT. -
The guide outlines necessary components, including a 2m FM analog radio, USB audio adapter, and Raspberry Pi. Building a cable to connect these elements is assumed, as is knowledge of Raspberry Pi OS installation. -
The project is an AVR ATMega328P based AX-25 1200 AFSK Digital Repeater, suitable for APRS digipeating -
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. -
he LoRa-APRS-iGate was developed in cooperation with the Austrian HAM Radio Association. With this software and the LoRa GW Shield, devices transmitting on LoRa, frequency 433 MHz can be integrated into the APRS network. The transmitter can then be displayed on the website https://aprs.fi. -
A homemade MFSK16 APRS HF tracker, worked pretty well for 1.5W on a Lipo supply with only 2 of the 3 BS170 FETs in the final -
This page provides instructions and links to download the latest APK version of APRSdroid and the Mobile HUD for ham radio operators. It also includes information on manually granting storage permissions for offline mapping files on Android 11+ devices. The page offers guidance on setting up and using offline maps in APRSdroid with OpenStreetMap.org. Various mapping options and providers are mentioned, along with a recommendation to support the author on Patreon. Overall, this resource aims to assist hams in effectively utilizing APRSdroid for their amateur radio activities. -
Using the RC-D710 Display with any HT The Display Head for the Kenwood D710 mobile APRS radio contains all of the APRS functionality in addition to the normal Radio control functions. -
Adding a custom GPS receiver to the Yaesu VX-8DR