I wrote the following to document how I configured radios for APRS position and PulseOx oximeter data telemetry (and for me in case I forget specifics on configuring this device).
My APRS portable package includes ArgentData OT-USB, GPS receiver, Nonin 3212 oximeter, and Kenwood TH-F6. 12VDC source (battery) connects to the red and black powerpole connector (battery not in photo).
(click images to view larger images)
Nonin 3212 oximeter is placed on my index finger, it connects to a Argent Data OT-USB that sends APRS packet data to a Kenwood TH-F6 portable radio. The BK DPH handheld in the left is used for voice contacts. Nonin 3212 oximeter has three connections: +5VDC, common, and RS232 9600 baud data out (but serial data is non-standard).
Tracker3 T3-Mini, new item for Jan 2014:
I wired a T3-Mini into this box with all connectors, LEDs, and power switch on top. Exception is analog inputs connector on side. Intent for this package is when placed in a pouch, pocket, or under seat in car, all cables go in one direction. Other exceptions are DC power and USB, not enough room on top. Printed on side are pinouts to connectors, avoids having to refer to documentation when building new cables. I used DB9 connectors as these are rugged and mates are common. Anderson powerpole is for external 12VDC. There is a spot for a 9V battery inside, this needs to be removed if connecting to 12VDC. Also internal is a fuse.
I had problems with my Tracker3-mini when I wired it into a box. It could not power both a GPS on port A and a PulseOx sensor on port B. I got it working by using a separate 5V regulator to power the GPS and PulseOx sensor. I also replaced the 680 ohm resistors for external LEDs with 1K resistors to reduce current draw from T3-mini board. With these changes made, it works as expected.
GPS receiver and Nonin 3212 Pulse Oximeter to OpenTracker-USB connection diagram
GPS receiver connects to Dataport A (pin 2), oximeter connects to Dataport B (pin 8). OT-USB supplies 5 VDC to both devices. GPS outputs at 4800 baud, oximeter outputs at 9600 baud.
ArgentData OpenTracker-USB data tracker configuration:
Here is where you configure the OT-USB with a PC, connect the two with USB cable and run otwincfg.exe. I configured the following:
OpenTracker-USB data collection:
Following up from hike on Saturday with friends at Angel Island (an amazing place, first time Ive been there), I was able to transmit APRS data of GPS and a oximeter. GPS RS232 comes in on dataport A (set at 4800 baud) and oximeter RS232 comes in on dataport B (set at 9600 baud).
I used a Kenwood F6 handheld with 1/4 wave dualband whip in my front pocket to transmit APRS. Another handheld I scanned W6PW repeater in case any hamsters read my APRS comment. However for SF W6TP and WA6TOW are more popular repeaters. Spreadsheet shows data collected by igate stations. I began transmissions when I left home, there are some periods when I turned off APRS while hanging around Pier 41 (I spent some time with the touristas). I stopped at Airport Marriott and turned off APRS (to get tickets for Intl Grand Ball dancesport competition I attended later that night).
(click image to view larger image)
Go ahead, try and find me at http://aprs.fi/info/a/K6MFW-9
Byonics TinyTraks, http://www.byonics.com
Pulse Oximeter References:
External OEM Pulse Oximeter and Sensor
Manual for ipod w/USB Connector
Brochure of ipod Specifications (11-29-09)
Pulse Oximeter Fundamentals and Design from Freescale Semiconductor 11/2012
Other activities Im involved with that extensively use APRS:
APRS tracking sites:
APRS how-to and tutorials:
APRS discussion groups:
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