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Thanks for that Stephen, very handy. You are right of course that
USB mice are virtually universally compatible as long as you have
the correct drivers installed. With luck you already have Prolific
or FTDI drivers and it'll work without any additional drivers at
all.<br>
<br>
That said there are some GPS receivers that have binary streams that
have functionality beyond NMEA. SiRF chipsets have such a mode and
it's conceivable that someone builds a GPS receiver (USB or serial)
that defaults to this mode, making it incompatible with applications
that are not set up for it. The GPS 18 I have for my asteroid
occultation work for example was programmed by the vendor to switch
to NMEA. Apparently it came in binary mode from the vendor. If your
application requires NMEA, ensure your GPS puts NMEA on the serial
port.<br>
<br>
So I think the best advise I can give is to understand the
capabilities of your software (expects NMEA on a serial port), the
capabilities of your computer (has RS-232 or bluetooth or USB) and
the capabilities of the GPS (TTL, RS-232, USB, BT, internal or
external antenna) you are considering. Things aren't difficult but
there are no true shortcuts. <br>
<br>
I made the mistake of buying two RoyalTek RGM-3600 receivers without
investigating them closer. Once received it was unclear if they were
TTL or RS-232. Luckily they were RS-232 but the vendor didn't know.
Then they turned out to be hard coded at 19200 baud which is too
fast for the D710. Attempts to slow them down failed. I learned a
lot about GPS modules in the process though. Interesting stuff :)<br>
<br>
I just got my BR-355 and I'm ready to open it up. Should be
interesting :) I'll take some pictures to share later if anyone
cares. The plan is to put it inside the D710 head.<br>
<br>
73,<br>
<br>
Sander W1SOP<br>
<br>
On 1/21/2012 2:23 PM, Stephen H. Smith wrote:
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