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GlobalSat 318 and TT5

 
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stevieg
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Joined: Jun 17, 2004
Posts: 6

PostPosted: Sun Aug 07, 2005 2:33 pm    Post subject: GlobalSat 318 and TT5 Reply with quote

Does anyone know if you need to reset something on the GlobalSAT 318 BT to allow it to work with TT5. I am failing miserably. It worked with TT3 and yes I have also tried telling TT5 it is another NMEA Wired GPS and tried all sorts of BAUD rate etc.

I have a NAVIGON receiver that works fine (so long as you pretend it is a wired NMEA).

Other than the data being tranmitted from the GPS receiver I am at a loss to explain why one BT GPS unit works and the other does not since both pair with my IPAQ 5550 fine.

Hence back the question on whether there is some tweak I need to make to the 318 data interface.

Anyone else got this unit working with TT5???

Thanks. StevieG
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lbendlin
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Joined: 02/11/2002 22:41:59
Posts: 11878
Location: Massachusetts, USA

PostPosted: Wed Aug 10, 2005 12:17 am    Post subject: Reply with quote

yes, you need to switch the receiver from SiRF to NMEA.
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stevieg
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Joined: Jun 17, 2004
Posts: 6

PostPosted: Fri Aug 19, 2005 11:53 pm    Post subject: Reply with quote

Thanks, Was on vacation for a week so just picked up your reply.

Looked at some of your other posts and then remembered that I had seen discussion on NMEA / SIRF output on GPSPASSION forum (hence why I could not find it again here!)

Anyway, took battery out of 318, left for a few hours and when I switched on then all worked. No idea at all why as I have never set the device to use SIRF data in first place and I assume it came factory set for NMEA.

Did try taking battery out before but perhaps did not leave long enough.

For whatever reason all works fine now. Cheers :D
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nez_bit
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Joined: Sep 05, 2005
Posts: 1

PostPosted: Mon Sep 05, 2005 10:09 pm    Post subject: Reply with quote

Hi guys,

Just got a BT-338 with TomTom 5 and had the same issue. Wanted to see what fiormware I had and ended up changing it to Sirf to see. Then wouldn't work with my PDA. CHanged back to NMEA and o.k.

Just wanted to know really why NMEA when it is a Sirf chip??
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lbendlin
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Joined: 02/11/2002 22:41:59
Posts: 11878
Location: Massachusetts, USA

PostPosted: Mon Sep 05, 2005 11:28 pm    Post subject: Reply with quote

There is a difference between chipset and protocol.

TTN5 (as well as the majority of nav programs) can work with any chipset (SiRF, Evermore, Nemerix, Xemics, Sony etc) as long as it emits NMEA protocol.

SiRF protocol may be fine and dandy but it's complete overkill for road navigation, and for 99% of all other applications. Plain old NMEA at 4800 baud is completely sufficient in this class of receivers.
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