From: Victor Rehorst (victor_at_newtontalk.net)
Date: Tue Nov 16 2004 - 06:16:52 PST
> How successful am I going to be, trying to get my Newton 120 (v1.3 or
> v2.0) to communicate with the current crop of high tech, miniature GPS
Probably pretty successful if you stay with OS 2.0. Probably the only other
GPS software running on 1.3 is Teletype GPS.
> 1) I've seen (relatively) cheap, mini GPS receivers on eBay, which
> utilize PS/2 ports for RS-232 communications and 5v-9v power. The link
> to the PDF manual for the device is here:
> I want to build a small project box with 4 AA NiMH batteries, to supply
> power to the PS/2 connector, plus provide a Newton compatible DIN 8
> RS-422 serial cable for the RS-232 signals from the device.
Cool. Sounds like a fun and easy enough project.
> 2) GPS Map Lite v1.2 (freeware) looks pretty impressive and runs on my
> MP120 so my questions are about using GPS Map Lite this type device.
> a) From the GPS Map Lite manual: The Newton compatible PDA has a mini
> DIN 8 female connector with RS422 levels. For making it RS232
> compatible normally pin 8 must be connected to pin 4.
> I imagine this applies in the case of this receiver mentioned above
> because the receiver does provides both, RS232 and TTL on PS/2 pin
> outs, I would simply ignore the TTL outputs.
> b) GPS Map Lite is aware of four NMEA 0183 message combinations:
> $GPGGA + $GPVTG
> $GPGGA + $GPRMC
> $GPGLL + $GPVTG
> or $GPRMC alone.
> The Polstar receiver says it provides NMEA 0183 GGA, GSV, GSA, RMC,
> (optional VTG, GLL)
> Sounds like it should work, no? Does anyone have any experience with
> GPS Map Lite on their Newton using an external GPS device?
I'm sure lots of people have. The Delorme Tripmate used to be a popular
low-cost external GPS receiver. It was basicially a large-ish yellow box with
a serial cable sticking out of it. It was powered by internal batteries but
could be modifed to use an external power source.
Me personally, I have a PCMCIA card, but functionally it's all the same...
Good luck with GPS!
-- Victor Rehorst - victor_at_newtontalk.net - chuma_at_chuma.org NewtonTalk list administrator - http://www.newtontalk.net Will the last person to leave the platform please turn off the backlight? -- This is the NewtonTalk list - http://www.newtontalk.net/ for all inquiries Official Newton FAQ: http://www.chuma.org/newton/faq/ WikiWikiNewt for all kinds of articles: http://tools.unna.org/wikiwikinewt/
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