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[aprssig] D710 GPS Port

Scott Miller scott at opentrac.org
Tue Aug 14 17:55:48 UTC 2007

Bluetooth is nice for convenience (you're right about the complexity and 
development cost, though) but in a situation where you need reliability, 
I can't see adding more wireless links and batteries into the mix. 
Yeah, cables can be a hassle, but at least you can standardize 
connectors and fix things in the field.  In the middle of an emergency 
response is the last time you want to be worrying about device pairing, 
interference, and whether or not all of your peripheral batteries are 
going to hold a charge.


Jason Winningham wrote:
> On Aug 14, 2007, at 9:12 AM, Bill Vodall WA7NWP wrote:
>> Bluetooth is so ..   wireless.
> and don't forget: so ... expensive.
> Those dongles you mention run about $100 each.  That GPS cable is a 
> bother, but it sure isn't $100 worth of bother.  If you find a module 
> that doesn't require you to implement the Bluetooth stack, it's still at 
> least $50 for the component.
> Bluetooth is so obscenely complex and expensive, you apparently need a 
> large development effort so you can use a cheap BT radio and implement 
> the stack in house, then sell a bazillion of them to recoup the 
> development costs.
> Oh, and that bluetooth peripheral needs power sooner or later, so you 
> either change/charge batteries, or you plug it up.
> I was excited about bluetooth until I gave a serious look at 
> implementing it with my APRS rig in the truck.  It doesn't look so good 
> anymore.
> -Jason
> kg4wsv
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