| Item |
Original Question |
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What baud rate does the GPS use?
› Garmin Montana 650 |
| Author |
Reply |
Dave
Edmonton |
| Original question asked on Jul 10, 2011, 8:16pm |
I'm trying to connect the gps to a Kenwood D710 to display APRS positions on the GPS and have the GPS provide the radio my current position. I'm using the AMPS mount. I have both set to NMEA In/Out.
What baud rate does the GPS use?
Does the AMPS mount require power to transmit/receive serial data?
Thanks |
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GPS City
Calgary, AB |
| Reply #1 on Jul 11, 2011, 7:03am |
Hello Dave,
I wish I could help you better with this use of the unit. I don't think it is supported yet. It took a short while for Garmin to support APRS with the oregon series after it came out. I suggest you contact Garmin for assistance with your APRS radio. 1-800-800-1020 The techs I talked to could not verify at this time. The more people who call about it the quicker that feature will be added
http://garmin.blogs.com/softwareupdates/2009/06/aprs-support-in-colorado-and-oregon.html
The default baud rate for Garmin devices is 4800 bps. Power to the cradle should not be needed for NMEA in/out. Are you able to get a valid NMEA message out to your kenwood radio? It should work as a beacon transmitter for now. You can test the NMEA strings by attaching the unit to the serial port of your PC and running Hyperterminal if available.
Cheers |
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Dave
Edmonton |
| Reply #2 on Jul 11, 2011, 8:43pm |
| I get no NMEA message on the radio. I tried it with Hyperterminal and I get no messages for any of the interface modes. I spoke with Garmin who were not much help. They said it should work and that there were no logged issues. I will try to log a ticket with them. |
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Jordan GPS City
Calgary, AB |
| Reply #3 on Jul 12, 2011, 6:48am |
Hello Dave,
I assume you are using all two data wires plus ground and going direct to a physical serial port. Have you tried swapping the data lines? Do you see any type of gibberish on the hyperterminal screen screen? Maybe bauds are not matched? When you change the settings do your reboot the unit? I found in some case for it to go into the proper mode you need to reboot the unit.
Cheers |
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Dave
Edmonton |
| Reply #4 on Jul 12, 2011, 8:46pm |
| I connect the data in, data out and ground. I have tried reversing the data in and out. I'm using a serial to usb cable as I no longer have a computer with a serial port. I use this same cable to program my Kenwood d710a radio. I see nothing in hyperterminal or on the Kenwood screen. The Kenwood works perfect with my MR-350 GPS and my friends Garmin 478. I have reset the Montana back to factory settings. I have firmware 2.5 on it and I reboot the gps after each change. I also reset the TNC on the radio after each change. I have also checked the pins and wires on the mount with a ohm meter. If I can't get a guarantee that this will work I will want to return the GPS as this is the only reason I purchased it. |
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Jordan GPS City
Calgary, AB |
| Reply #5 on Jul 15, 2011, 7:44am |
Hello Dave,
I will have to look into it myself. It should do NMEA, if not now maybe Garmin needs to do an update. I will try to test it at my end ASAP |
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JAmBer
Berkeley |
| Reply #6 on Aug 29, 2011, 4:02am |
| Thanks for this detail! I spent two hours this weekend trying to get the same thing working with firmware 3.20. Should've just searched online before going to all the trouble! This is very dissapointing from Garmin it clearly states the availability of this function in the manual for the Montana and the pamphlet for the rugged mount. I've logged a tech support question asking about RS232 NMEA serial output support from the rugged cradle on the Montana series. I'd urge everyone else wanting these lines to work to do the same. |
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JAmBer
Berkeley |
| Reply #7 on Aug 31, 2011, 12:07am |
Update from Garmin:
"... The engineers have been made aware of this and will be looking into it. I would assume that an update to the device will be released shortly..." |
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Jordan GPS City
Calgary, AB |
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Ahil K7APS
Woodinville, WA |
| Reply #9 on Dec 7, 2011, 8:52am |
There is a beta version of the Montana SW that gets NMEA output working. I've only been able to get it working with the marine mount, not the serialpower cable.
NMEA input doesn't seem to work at all.
At this point, I'd definately avoid buying the Montana for APRS or NMEA other applications. |
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Phil K7APS
Woodinville, WA |
| Reply #10 on Dec 7, 2011, 8:54am |
| I'm blocked from posting the direct link, but if you search for "garmin montana beta software" you should be able to find it fairly easily. I tried version 3.66. |
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Jordan
GPS City |
| Reply #11 on Dec 7, 2011, 9:12am |
I have been able to get the NMEA to work with a PC but for some reason some devices will not see the data. I have been testing a Standard Horizon radio with no luck. The radio will talk to older units but nothing made in the past couple years.
Thank you for your post |
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