Wednesday, October 14, 2009

APRS =TM-D710+ Nuvi 350

I don't think you can have too many hobbies.

9/11 and later Katrina reinforced the fact that you need redundant communications systems...just in case...

So after Katrina I pursued getting an Amateur Radio License (Ham)...
...well let me point out that in times of emergency, when there is a real threat of loss of life or property, everyone is authorized to use any frequency band to summon help if unavailable by any other means...
so I gathered radios, but didn't get the license, until now. The test is straight forward if you use any of the many practice tests available...or just memorize the question bank.

What really made me decide to go legit was the advances in APRS equipment and availability.

APRS (according to the FCC test-Automatic Position Reporting System...according to the folks who made it and use it-Automatic Packet Reporting System) is in its simplest terms, a text messaging system. But it is much more than that.

Think of the radios as part of a giant wireless network (maybe 20 miles apart, depending on antenna height, terrain, power output).

The data is sent via a text format over the radio (like a 1200 baud dial up modem)...but the data can be any number of extremely useful things. Like weather. You could set up a weather station at a remote location without internet, and have APRS transmit the weather data.

I am using it to send my vehicle location as I travel.

Now so far I am sure some out there are saying to themselves...but I can already do that with a cellphone and the internet.

True...but this system still works if the cellular, and landline phone systems are down or saturated (9/11), if power is out/internet out, etc(Katrina).

The practical application is for emergency workers to have this system to mark this location, and be able to send text messages to other emergency workers. It allows a command center to know where the assets are and send them info without worrying about a mistake in copying a voice transmission.

In a later post I will give the details of what gets plugged where, and settings etc. There are some guides out there...but none with this exact setup.

I will also show hooking up the TH-D7AG to the Nuvi 350 later.

In the mean time look at

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