Building an NMEA to RS232C (or USB) interface

[Doghouse]

I doubt USB will be all that easy, so lets start with RS232C.What is the proper way to hookup an NMEA out/in to the RS232C interface of a computer. I am attempting to build a backup plotter. If more information is needed than I am providing please ask. I figure someone has to have built their own.

 

[Kevin3447]

Some Links...

http://vancouver-webpages.com/peter/ - look under "wiring diagrams and antenna construction"http://vancouver-webpages.com/peter/eagle.gifI was researching this a couple of years ago, and last year I put something together. Basically, the signal levels of the NMEA interface are very close to RS232, and in most cases will work if you wire a serial connector on to your GPS data out cable. I used 3 RS232 to USB adapters because we had instruments on different "networks", and I was able to read data from all of them with no problems. Section 5 here http://www.eoss.org/pubs/nmeafaq.htm has the pinout.An alternative is to buy one of these:http://www.usglobalsat.com/item.asp?itemid=60then you have two separate GPS sources.Kevin

 

[Rick Dalton]

Brookhouse Multiplexer

Do a Google Search for "NMEA to USB". You'll find the very complex answer there.

 

[Doghouse]

Tnx

tnx, I thought that it was simple, just could not remember.