We have taken delivery of an Arduino based APRS and RTTY tracker called Habduino. The Habduino uses a 10mW UHF transmitter on 434.650Mhz and a 300mW VHF transmitter on 145.175Mhz for APRS. The Habduino was developed by Anthony Stirk.

Habduino - Top Left UHF, Bottom Left GPS, Top Right Power, Bottom right VHF

Habduino – Top Left UHF, Bottom Left GPS, Top Right Power, Bottom right VHF

2m VHF Radio underneath the shield

2m VHF Radio underneath the shield

 

power on Arduino 'Eleven' & HABduino shield

power on Arduino ‘Eleven’ & HABduino shield

We built a 70cm UHF dipole 1/2 wave antenna  and used our existing 2m VHF 1/2 wave dipole antenna to test the tracker

Anticlockwise from top: 2m VHF Antenna, Battery, GPS, UHF Antenna

Anticlockwise from top: 2m VHF Antenna, Battery, GPS, UHF Antenna

The VHF APRS was configured with our callsign VK2HAB using designation 11. The Habduino code was slightly modified and uploaded to a Freetronics Eleven (Arduino Uno compatible). Once the code is uploaded the Arduino and Habduino shield runs on 2 x AA batteries.

Once the Arduino boots and the GPS gets a lock the Habduino starts to send out APRS packets every minute. These were received on our handheld Kenwood TH-D72A

Received APRS packet

Received APRS packet

The Habduino and Arduino weigh in at 59 grams, including the batteries and GPS it is 136grams

We will do some work on the UHF RTTY to try to decode the RTTY traffic as well. However initial testing so far is good and we intend to fly this tracker.