> 1. USB GPS Receivers
> Posted by: "Matt" wx4met@... wx4met
> Date: Sat Mar 3, 2007 5:38 pm ((PST))
> I was recently presented a question concerning the TT3+ and the USB
> GPS receivers now available from Microsoft. Any thoughts on this
> working with the TNC-x? Seems to me it would be a fair bit of trouble.
> Matt, WX4MET
It would be a fair bit of trouble.
The USB GPSs and a USB equipted TNC-x both need to talk to a USB Host,
i.e. a computer; they're not able to talk to each other without one,
as that's the nature of USB. (Ever wondered why there are USB-A plugs
and USB-B plugs - it's to stop people attempting to connect two
masters or two slaves together...)
Unfortunately USB is not as simple as RS-232 serial comms, there's a
whole lot more going on behind the scenes when you plug a USB device
into a PC.
However all is not lost, as there is usually some form of TTL type
serial data present in a USB GPS before it goes into the GPS's USB
slave chip, and it's not impossible to get at it and use it for trackers..
See <www.qsl.net/zl1vfo/gps/gps.htm> if you are interested...
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