Fresh hacks every day
The hardware seen above is used to bridge a local RF radio network to the APRS-IS network. The APRS-IS is an Internet Service that uses a web connection to communicate between APRS networks in different parts of the world. The Raspberry Pi is perfect for this application because of its ability to connect to a network, and its native use of Linux. On the software side the majority of the work is … [Read more...]
[Shane Burrell] decided to spend some time learning how the keypad on the his Kenwood TM-710A APRS radio mic works. It uses a different technique than you might think. Normally a grid of buttons is scanned as a matrix to detect keypresses, but this hardware actually counts pulses on a serial wire to take each reading. The stock radio sends a steady digital pulse to the handset and with each … [Read more...]
[Chris Kantarjiev] is an amateur radio enthusiast (call sign K6DBG) and does a lot with the APRS. We think his build, turning a WRT54gl router into an APRS gateway will be very useful for the APRS tracker builds we've been covering. Setting up an Internet Gateway, or igate, on APRS usually requires a 'real' computer. [Chris] didn't like that idea, so he took aprs4r, igate software for embedded … [Read more...]
[Bill Meara] was watching the International Space Station and the Shuttle Discovery pass overhead a few weeks ago, which rekindled an interest he gave up long ago - sending and receiving radio packets from space. Years ago, he used to send APRS packets into space with a small rig powered by a 286 computer and HandiTalkie. These packets would drift off into space most of the time, but … [Read more...]
Trackuino is a new open source (GPLv2 license) Arduino APRS tracker designed by [Javier Martin]. If you are unfamiliar: APRS (Automatic Packet Reporting System) is an amateur radio method used to relay small packets of position-tracking data to an online database for easy access and mapping. In this case, GPS telemetry data is used to track latitude, longitude, altitude, course, speed, and time … [Read more...]
[Andrew] used a DSL router to make his own Terminal Node Controller. This will become part of an APRS-IS network, an Internet-based network built by amateur radio operators. The router used here is a Dlink DSL-502T with an AVR based TNC module attached to the serial port header. The phone line connector and its accompanying hardware have been removed to make room for the TNC module, which is … [Read more...]
We posted a story about someone doing some APRS tracking recently. This is old news to some, but new fresh stuff for others. If you want to build your own tracker, here's a great writeup on one. The WhereAVR is low cost, low power and has plenty of I/O. With all of the schematics and PCB files available on his site, you should be able to get one working in quickly. He does need a little help … [Read more...]
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