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Dynon GPS Support (Read 32265 times)
Jan 8th, 2007 at 4:26pm

lykowdk   Offline
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There seems to be a bit of confusion about what kind of GPSs can be hooked up to our units.
So, here is a list of current requirements.

1. NMEA format GPSs
    It does not matter what version of NMEA you are using.
    Baud rate must be 4800 or 9600. The baud rate will be auto detected.
    Must provide the following sentences.
        GPRMB - This sentence is needed always
        GPRMC - This sentence is needed always
        GPGGA - Only needed if you want GPS altitude
        GPBOD or GPAPB - One of the two sentences must be present, but you don't need both. If neither are present, the OBS will always indicate 360.

2. Aviation format GPSs
    Any GPS that outputs the Aviation format can be used.
    Baud rate must be 9600.
    Apollo GPSs may or may not work. They need to be set to MAP mode. (Some Apollo GPSs can only be set to MAPCOM mode.)

GPSs currently known not to work:
All Lowrance ( Will be fixed in next firmware release. )
Apollo/GNS 480/580 ( Only supports MAPCOM output. )
AnywhereMap ( Does not output all the needed sentences. Time output is wrong. )
GX50/60 ( Will be fixed in next firmware release. )

GPSs currently known to work:
Garmin X95 (195, 295)
Garmin X96 (196,296,396,496)
Garmin 430 / 530 (GPS portion only)
Garmin GNC 250/300

Feel free to add/remove from the list if your unit is not currently listed.

« Last Edit: Sep 5th, 2007 at 9:01pm by Dynon Support »  
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Reply #1 - Jan 9th, 2007 at 1:24am

lucaberta   Offline
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Quick question on the speed of the NMEA stream coming from the GPS.

Does it need to be fixed at 4800 bps, or would the Dynon unit auto-sense the speed and eventually adjust also to 9600 bps?

The reason for the question lies in the fact that the Garmin units have a fixed speed on the serial port, and if I wanted to splice the serial line to both an SL30 (for automatic frequency pre-loading) and the Dynon unit, then I'd have to stick to 9600 bps since that is the only option in NMEA+VHF Out.  If I would select NMEA out the speed would be 4800 bps but I would lose the frequency pre-loading on the SL30.

Thanks and ciao, Luca
 
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Reply #2 - Jan 9th, 2007 at 8:27am

Dynon Support   Offline
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It will auto sense between 4800 and 9600 baud.
 

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Reply #3 - Jan 9th, 2007 at 11:46am

azscotts   Offline
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Hmm...I don't see the the Blue Mountain EFIS listed.

Anyone running a BMA EFIS/Lite Plus or EFIS/One coupled with a Dynon?

I would be curious as to whether they would work together.

Right now, I am about half a heartbeat from finalizing my panel layout and buying up what I need.  Here is what I am most leaning to:

D100 - with AoA and battery backup. EFIS for my PFD
BMA EFIS/Lite Plus G4 - GPS w/Moving Map (hopefully connected to D-100)
SL30 - NAV/GS/Comm connected to both D-100 and BMA
Trio AutoPilot w/Alt hold
D-120 Engine Monitor
Compass/Airspeed/Altimeter (backups)
Garmin GTX-327
Audio Panel/ELT/Etc.

I figure with this layout I get the most bang for my buck.  I get the mostly glass panel with redundancy between the D-100 and BMA.  I get separate engine monitoring (full time).  I get the SL-30 interface to the BMA and the D-100 for NAV/GS data.  If the BMA fails, NAV data still goes to D-100 and should the D-100 fail, I can still use BMA for PFD.  A complete power power failure is negated by the one magnetic and two steam gauges.

Anyone with additional input regarding BMA EFIS/Lite to D-100 compatibility please let me know.
 
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Reply #4 - Jan 9th, 2007 at 12:35pm

Dynon Support   Offline
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Put the $130 battery in your Dynon EFIS-D100 and a complete power failure is negated by having the EFIS run for over an hour on its own power Wink

As for if we'll work with BMA, that's a question for them. None of their manuals mention having a NMEA output from the GPS, but they may have added it and not documented it. We'll work with it if they send it out in standard form. Make sure they send out all the sentences we need or you'll only get partial support.

Also remember that you will now be fully reliant on the BMA flight planning and database for your GPS navigation info, since the Dynon HSI can only display what it is sent from an external unit.

« Last Edit: Jan 9th, 2007 at 2:24pm by Dynon Support »  

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Reply #5 - Jan 9th, 2007 at 2:05pm

PRose   Offline
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Dynon Support wrote on Jan 8th, 2007 at 5:03pm:
Units known TO work fine:

Garmin X95 (195, 295)
Garmin X96 (196,296,396,496)
Garmin 430 / 530 (GPS portion only)


Does this mean that the GNC250/300 DON'T work fine?

P Rose
RV-9A
contemplating panel
 
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Reply #6 - Jan 9th, 2007 at 2:23pm

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No, just that we don't have absolutely positive confirmation that they DO work. Not all devices output the NMEA data exactly properly. Our hunch is a lot of the Garmin stuff is likely to work (having been designed by the same company that makes other products that we know work).
 

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Reply #7 - Jan 9th, 2007 at 3:37pm

Thomas_Schaad   Offline
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I have the GNC250XL hooked up. It does work but once in maybe 3 minutes the CDI jumpes back to 000/180°, then it looses  CDI, keeps the RMI needle on 000/180° and back it is. All this goes that fast, you hardly can see it.

The behaviour is in general ok.

Best regards

Thomas Wink
 
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Reply #8 - Jan 9th, 2007 at 4:47pm

Glasair1   Offline
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I have an fairly old GPS with the moving map (Skymap IIIC).  Will this work also?  Right now I have it
driving a TRUTRAK autopilot with no problems.

I also have a question about the SL30.  Is this the only NAVCOMM that will work with the D10A or will any available navcomm work?  I have a Narco nav and radio setup and have been told they have a
different interface.

Also a question about the GPS /SL30 connection.   Is this a one or the other but not both?  I seem to recall in the D10A manual there is a selector.  They both would give valuable info to the EFIS.....

Lots of questions... sorry .. new to the forum.  I am thinking of getting the D10A and want to make an informed decision....

Jay
 
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Reply #9 - Jan 9th, 2007 at 5:00pm

Dynon Support   Offline
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The Skymap has been reported to work, but you have to put it in AR-NAV output mode. Not sure if the TruTrak will work with the GPS in this mode, but I am guessing that it will, since this is the same as a Garmin 430 and those work with TruTrak units.

The SL-30 is the only NAV radio that will work for now. We only support serial connections, and the SL-30 is the only radio we know of that does NAV via serial.

The EFIS only has one interface to receive data, so it's the GPS or the SL30 at any given time, but if you install an external switch (switching just one wire) you can switch between them and the EFIS will auto-detect this change. If you install an EMS in your plane, then we can support both at once because you can wire one of them into the EMS.
 

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Reply #10 - Jan 10th, 2007 at 10:29am

Simon Smith   Offline
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I can confirm that the Skymap IIIc works with the Dynon but can't comment on the autopilot.

Picture of the HSI driven by the Skymap at http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1167702850
 
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Reply #11 - Jan 10th, 2007 at 10:30am

azscotts   Offline
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Just an FYI for the group.  After talking to Greg Richter at BMA, their EFIS line only output's NMEA-0183, RMB, RMC.  Its used for AP steering only so you would only get partial functionality if piping that stream to a D100.

Too bad too, I thought I was going to have the Ultimate Panel (In my eyes at least) for functionality, redundancy, and simplicity.

I was hoping to have it layed out like this:

- D100 for primary flight w/ AOA & OAT (battery backed up)
- BMA EFIS/Lite + G4 (for moving map, GPS flight plan and backup to the D100 also piping HSI to D100)
- SL-30 piped to both the D100 and BMA (That way I got VOR/LOC/GS for Instrument approaches displayed right on the D100 or BMA)
- Trio auto-pilot receiving GPS steering from the BMA
- Trio EZ3 Alt Hold
- GMA340 Audio Panel (I know the SL30 has intercom but I want the Marker Beacon functions and ability to pipe audio to intercom from a few sources)
- D120 for engine monitoring DSAB to D100
- AS/ALT/Compass steam gauges in case of a catastrophic electrical failure (I already have a handheld ICOM and GPS-195 for backups for Comm and GPS)

My question for Dynon and the others out there...Does anyone see a problem with this setup Questioning

I guess I could just use BMA's HSI and Moving map keeping the GPS output for driving the Auto Pilot and split the SL-30 output to the D100 and BMA...thoughts/concerns Questioning

I am really looking for some suggestions as to what others have done and want honest opinions.

Scott
RV-7A N696JS
« Last Edit: Jan 10th, 2007 at 1:55pm by azscotts »  
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Reply #12 - Jan 10th, 2007 at 3:07pm

Simon Smith   Offline
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azscotts wrote on Jan 10th, 2007 at 10:30am:
I was hoping to have it layed out like this:

- D100 for primary flight w/ AOA & OAT (battery backed up)
- BMA EFIS/Lite + G4 (for moving map, GPS flight plan and backup to the D100 also piping HSI to D100)
- SL-30 piped to both the D100 and BMA (That way I got VOR/LOC/GS for Instrument approaches displayed right on the D100 or BMA)
- Trio auto-pilot receiving GPS steering from the BMA
- Trio EZ3 Alt Hold
- GMA340 Audio Panel (I know the SL30 has intercom but I want the Marker Beacon functions and ability to pipe audio to intercom from a few sources)
- D120 for engine monitoring DSAB to D100
- AS/ALT/Compass steam gauges in case of a catastrophic electrical failure (I already have a handheld ICOM and GPS-195 for backups for Comm and GPS)

My question for Dynon and the others out there...Does anyone see a problem with this setup Questioning


Well my first question is how much will that lot weigh?

The best (tongue in cheek) advise that I had when I was building was to take anything that I was thinking of adding to the aircraft and threough it in the air.  If it comes back down it's too heavy Smiley

Anyway back to your question. I would suggest the following:

SL30 (plus audio panel)
D100
D180
GPS of your choice that will interface with the Dynon and the autopilot
Backup batteries fitted in both Dynons.

That way you have two sets of flight instruments, one set of engine instruments (displayable on either screen with DSAB) and three independant power sources.

If you want even more redundancy then get two D180s

Simon
 
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Reply #13 - Jan 10th, 2007 at 3:41pm

azscotts   Offline
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I have given the 496 a look but I want a more finished look to the panel and if i were going to go that route, I would probably use a 430 and pray for dynon's dev team to come up with a hardware interface to translate 430 nav info.
 
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Reply #14 - Jan 10th, 2007 at 4:43pm

Dynon Support   Offline
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Reply #15 - Jan 15th, 2007 at 10:37am

RobG   Offline
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Can I use a Garmin GNC 420 (GPS/Comm only) and a SL30 Nav/Com?
 
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Reply #16 - Jan 15th, 2007 at 11:12am

Dynon Support   Offline
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The SL30 will work for sure.

The GPS side of the 420 will work if it has NMEA 0183 or Aviation Format output (the latter is more likely since it looks very similar to the 430/530, which does have compatible Aviation Format GPS output). It doesn't look like we have positive confirmation from a customer yet on that model though.
 

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Reply #17 - Jan 21st, 2007 at 3:14pm

funflying   Offline
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Will a Garmin 196 show simulated information on the HSI of the D100 while parked in the hangar testing systems?
 
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Reply #18 - Jan 21st, 2007 at 3:22pm

Dynon Support   Offline
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Don't know. I'd assume it would still output data in simulator mode, but it may not. It will work in non-simulator mode even without sats.
 

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Reply #19 - Feb 5th, 2007 at 1:18pm

WT9   Offline
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Quote:
GPS's currently known to work:
 
Garmin X95 (195, 295)
Garmin X96 (196,296,396,496)
Garmin 430 / 530 (GPS portion only)  
Garmin GNC 250/300
Garmin GPS III Pilot
Skymap IIIC in ARNAV-mode but without GPS Time
 
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Reply #20 - Mar 12th, 2007 at 9:05am

WT9   Offline
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Hi!
Today I hooked a Garmin 496 (V 2.9) to my D100 (V1.08). In the Forum is to read the 496 works well with the D100.
But I have following Problem:
All Data seems correct on the D100 HSI-Page! Also the HSI Needle works correct! For 1 second - then the needle jump to N. After another 1 second the HSI jump to the correct course back again - and so on. The HSI Needle changes from corect to N every 1 second!
I think I tried every possible adjustment in the NMEA-Menü - but no changes!
Perhaps I forgot something?

Anyone with an Idea?

Regards John
 
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Reply #21 - Mar 12th, 2007 at 10:11am

Dynon Support   Offline
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see this post
 

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Reply #22 - Mar 12th, 2007 at 12:00pm

WT9   Offline
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I think I made any adjustment correct!

NMEA In / NMEA out
Output speed is set to "normal" (4800 Baud)
I tried to change "Garmin output" enabled and disabled

Everything works fine! Only the HSI is JUMPING !!! from correct to North - changing every second!

Did anyone had this problem before ?

Regards, John
 
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Reply #23 - Mar 13th, 2007 at 8:32am

Dynon Support   Offline
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We haven't heard of this once the data rate is set to normal, but you might try 9600 baud to mix things up.

Also, know that if you're not powering your 496 off of ships power, you'll want to run a ground line between the GPS and your Dynon.
 

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Reply #24 - Mar 21st, 2007 at 9:09pm

az_gila   Offline
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Does your comment on the UPSAT GX-50/GX-60 also include he GX-55 and GX-65 units?

thanks  gil A
 
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Reply #25 - Mar 22nd, 2007 at 9:27am

Dynon Support   Offline
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They probably won't work (but can't be certain). From a quick glance, it looks like they only differ in their IFR certifications, so they're likely the same basic electronics underneath.
« Last Edit: Mar 22nd, 2007 at 11:11am by Dynon Support »  

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Reply #26 - Mar 22nd, 2007 at 11:21am

Mel   Offline
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I have an early D10. If the external backup battery is connected, is the external battery charged or is it a constant loss system?
 

Mel Asberry&&DAR Specializing in Amateur-Built & Light-Sport Aircraft
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Reply #27 - Mar 22nd, 2007 at 12:50pm

Dynon Support   Offline
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The D10/D10A only use the external backup as a second power source. They will not charge something connected here.

They do charge the optional internal battery.
 

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Reply #28 - Mar 26th, 2007 at 11:21am

mike@tantacomm   Offline
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I was just about to ask about the baud rate and the NMEA sentence issue, but the
posting took care of this, my problem would have been APB,

The Garmin 165 (and 155 regular panel mount, I think)  output RMC, GGA, GSA, RMB,
GSV, BOD, WPL and a Garmin proprietary PGMRE,

I'll let you know how it plays, Garmin has two serial outs, one for a map and
one for whatever,

Thanks
Mike

 
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Reply #29 - Apr 4th, 2007 at 12:10pm

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Any further word on WT9's post of March 12th regarding the HSI jumping to North every other second? I too want to connect a Garmin 496 to a EFIS D-100, but the Garmin book indicates that neither GPBOD nor GPAPB are output and Dynon says at least one is required to have the HSI work properly. Is the Garmin information old/incorrect or is this the problem? Thanks for any information.
 
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Reply #30 - Apr 4th, 2007 at 1:50pm

Dynon Support   Offline
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We've had plenty of people using the 296 / 396 / 496 with the HSI with no problems for half a year now. When wired and set up correctly, it will work.
 

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Reply #31 - May 12th, 2007 at 8:32pm

Vern-X   Offline
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Has anyone managed to get Altitude to display on the HSI page when connected to a Garmin 296?  I'm running NMEA IN/OUT.

Advice appreciated.

Vern Little
 
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Reply #32 - May 13th, 2007 at 4:03pm

flybuddy   Offline
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Has anyone interfaced the D100 with an Avmap (either the EKPIV or Geopilot??)..thx
 
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Reply #33 - May 21st, 2007 at 1:25pm

ericd   Offline
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mdevans9 wrote on Apr 4th, 2007 at 12:10pm:
Any further word on WT9's post of March 12th regarding the HSI jumping to North every other second? I too want to connect a Garmin 496 to a EFIS D-100, but the Garmin book indicates that neither GPBOD nor GPAPB are output and Dynon says at least one is required to have the HSI work properly. Is the Garmin information old/incorrect or is this the problem? Thanks for any information.


I am not super familiar with this model of GPS, but am quite familiar with GPS spec as a whole. You may want to look at the reporting rate of the GPS output. Some GPS manufacturers give you the ability to control the reporting rate anywhere from multiple times per second to less than once per second. 

Don't confuse baud rate with reporting rate as they are not the same. Most GPSs hide reporting rate adjustment inside AUX menus or initial setup menus. Normally, sentence content is not affected by an increase in reporting rate, but I have seen cases where a maximum reporting rate combined with maximum sentence output has resulted in data loss (mainly checksum info) and sentence corruption.

This may or may not help, but it is food for thought. Cool
« Last Edit: May 21st, 2007 at 1:40pm by Dynon Support »  
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Reply #34 - Jun 23rd, 2007 at 9:02am

lsaflyer   Offline
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Hello Guy's: I would like to connect my skyforce III c to the D-10A but have no idea how. Do you can expain it how setup and wireing has to be, please. This would be great. Thx a lot.

WAU, I found it out today: skymap sub-d connection pin 2 is TX-Data must go to D10A pin 16 and skymap pin 4 is RX-Data must connected to D10A pin 10; ofcourse with GND. To setup the skymap is a little bit tricky to get the Datatransfer-Page. There you have to select the Protokoll. That's it. It works fine.  Smiley
« Last Edit: Jun 25th, 2007 at 7:55am by lsaflyer »  
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Reply #35 - Oct 23rd, 2007 at 10:36pm

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I am using an AvMap EKP 4 with Dynon D10A.  All seems to work well except the wind speed.  Direction of wind and xwind component seems OK but the actual speed is much too high.  I am running the suggested serial data strings.

Any suggestions?
« Last Edit: Oct 24th, 2007 at 8:51am by rngaines »  
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Reply #36 - Oct 24th, 2007 at 12:00pm

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Good direction but bad speed could be caused by TAS that isn't quite right. That could in turn be caused by an OAT that's really off.

Per NMEA spec (the GPS output format), speed should always be reported in knots. But make sure that the AvMap doesn't have a configuration that allows that to be changed to somethings else. This isn't likely, but is still something to look into.
 

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Reply #37 - Oct 29th, 2007 at 6:34am

alan milner   Offline
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I'm using an EKP IV with a D100 EFIS and had problems at initial setup when I was sending too much information from the GPS (it also drives a trutrak autopilot so I turned everything on to get it going) .  I trimmed the sentence down and it works perfectly now.  I checked the wind speed with a couple of reverse legs and it was correct for me.
I can't remember the exact settings but can check the config if you wish?

Alan
 
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Reply #38 - Oct 29th, 2007 at 3:57pm

Butt   Offline
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Hi Guys,
              anyone out there running a garmin 150(gps only) in there setup with any dynon instruments. Dynon, do you have any info on garmon 150/dynon setup? Please advice.

regards
 
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Reply #39 - Oct 29th, 2007 at 5:53pm

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Put the 150 in NMEA or Aviation output format and hook it up like any other GPS. No setup needed on the EFIS side, and we'll auto-detect the format. It should work just fine.
 

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Reply #40 - Nov 5th, 2007 at 9:47am

NC-RV6   Offline
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Hi DynonSupport,

I am helping rngaines with his AvMap IV EKP problem and emailed you some NMEA data before I registered for the forum.  Please let me know if you need any more data and I'll be happy to go get it.

I am wondering if other AvMap users with current firmware are really getting good winds-aloft data.  Our testing makes me think folks living where the magnetic variation is close to zero would see accurate winds.

We are using V 3.0 for our D-100 and D-10A.

 
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Reply #41 - Nov 6th, 2007 at 4:32pm

jakej   Offline
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From my expexperience there have been some NMEA datastream interface issues with the Avmap EKP IV mainly with autopilots including the most recent SoftwareUpdate 2.04.110R - 2007-09-26 - an autopilot will work on the ground but looses the Gps (NMEA) at speed.

Avmap assures me that another update will be done this week - we'll see  Wink  hope this helps.

cheers, jake




 
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Reply #42 - Nov 6th, 2007 at 4:39pm

NC-RV6   Offline
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I have been in touch with AvMap and am helping them test a new version that should correct the missing magnetic variation problem in the $GPRMC sentence.  I think a few more turns and they should have it working.  Smiley

I am only testing the fix for mag-var since I don't have an auto-pilot (other than my wife).

-Neil
 
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Reply #43 - Nov 7th, 2007 at 7:38am

Hal   Offline
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Hi Neil,
I guess this is the problem I am having with my D180-EKPIV installation. The wind vector is just not reliable. Please let us know the outcome of your testing. Now if Avmap would finish that XM weather they have been promising...
Hal
Sonex N808SX
Cornelius, NC

NC-RV6 wrote on Nov 6th, 2007 at 4:39pm:
I have been in touch with AvMap and am helping them test a new version that should correct the missing magnetic variation problem in the $GPRMC sentence.  I think a few more turns and they should have it working.  Smiley

I am only testing the fix for mag-var since I don't have an auto-pilot (other than my wife).

-Neil

 
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Reply #44 - Nov 7th, 2007 at 7:54am

NC-RV6   Offline
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Hi Hal,

Also make sure you put in Total Intensity, not the Horizontal Intensity, and Inclination instead of Declination.  If either of these are entered wrong before you calibrate, your cardinal points will calibrate ok but headings get really off between them.  This will also throw your air data (winds aloft) off.

Not that we made any of these mistakes...    Wink

-Neil
 
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Reply #45 - Nov 13th, 2007 at 2:23am

Etienne   Offline
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Any chance of adding a baud of 115200?

The reason I ask is because the output from the efis is at 115200, and most com ports cannot receive and send at different rates. I'm building a computer-based system that needs to read in from the efis, and I'd like to feed GPS and SL30 data back to the EFIS, and would like to do that through the same com port.
 
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Reply #46 - Nov 13th, 2007 at 8:50am

Dynon Support   Offline
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At the current time, it's unlikely we can add 115200 to the GPS support. In an embedded environment, feature additions like this aren't simple code changes. We have to drop down into assembly code to add support like that. If more people request this, we may reevaluate.
« Last Edit: Nov 13th, 2007 at 9:12am by Dynon Administrator »  

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Reply #47 - Nov 17th, 2007 at 6:21pm

DougN   Offline
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Florida, US; Zodiac 601 XL

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For those who are having difficulties with AvMap EKP-IVs, I'm afraid I've joined the club. Even when the GPS has a fix at takeoff, it often loses itself while flying. I took a video of the GPS flipping back and forth between a stated track of 270 and 90 - it couldn't figure out which way I was going (I was heading west). This I sent to AvMap asking for their thoughts on the matter.

My current conjecture is that the antenna placement in the airplane is critical. Any metal surrounding, or on top of, the antenna could attenuate or distort the signal. The antenna is mounted on top of the panel just under the foward canopy roll bar. There is also the possibility of EMI from the strobes and radios. I received a new antenna (it is an active component, and so could be the source of the problems), and went out flying today. Things seemed to be better for a while, then the "what direction are we going" issue rose its head again. It seemed to be corelated to where I placed the antenna; so I'm going to investigate that further.

What have others experienced with antenna placement?

I've also ungraded the SW to the 2.06.x version they've just published.

Taking the GPS out of the plane and using it in my car, it seems to work.

I've also experienced the "70 knot crosswind" but I've laid it off on the GPS at the moment. Frankly, my Dynon equipment has been rock-solid (version 4). I just love it.

There are unresolved issues with the DigiFlight II autopilot as well; but these seem also to be caused by the GPS issues.

Airplane: Zodiac CH601 XL
Avionics: DigiFlight II, EFIS D-100, EMS-D10, SL30, GTX-327, EKP-IV Pro, PS 1000 II

Any thoughts greatly appreciated; perhaps if we trade experiments and their results we can figure out what's going on.
 
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Reply #48 - Nov 18th, 2007 at 9:49pm

DougN   Offline
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Moved the GPS antenna from on top of the panel to under the canopy on the turtle deck behind the seats.  This is away from the engine's electrical noise and all the local oscillators on the radios.

GPS Problems went away.

The winds aloft / cross-wind showing on the Dynon is now correct too.

For those who are having trouble with the EKP, try repositioning your antenna.
 
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Reply #49 - Nov 19th, 2007 at 5:57am

Butt   Offline
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Hi,
     i have tackled the avmap antenna issue by using  an smb-bnc adaptor so as to use the garmin GA-56 antenna  mounted externally on the fuselage for the best satellite coverage.

regards.
 
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Reply #50 - Nov 20th, 2007 at 4:02pm

Dynon Support   Offline
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Another customer called today having the same problem with his AvMap- the wind arrow was way off due to the ground track being "true" rather than "magnetic."

He then called AvMap and they sent him a link to a new download for his GPS unit, which he says fixes the problem. I don't have the info on the link or whom he talked to, but there does appear to be a new AvMap update that fixes this issue.
 

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Reply #51 - Nov 20th, 2007 at 5:20pm

DougN   Offline
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Florida, US; Zodiac 601 XL

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Thanks for the feedback. The ultimate cause for my problem, and I'm guessing many others, is the marginal design of the antenna used by the AvMap EKP-IV, and the unshielded cable carrying the signal (uses a 5v source on the center conductor, and the modulated signal carrying the GPS result from the active GPS receiver on the outer conductor). Attenuation of the signal due to noise and induced currents resulted in corrupted data; and everything seemed to go south from there. Other antennas seem to be more robust; but a simple change of antenna location may be sufficient to fix the issue. I'm told that this "never" happens with the Garmin GPSs; and that may be true, but the large viewable aea of the EKP-IV makes it seem worthwhile to figure out how to render the device usable.

There was also a continuing probelm even after upgrading the software until the location was changed; so, taking Dynon's point of view, ensure that your customers both upgrade the SW, and play with the antenna location when the problem is an AvMap EKP-IV.

All the best,
Doug N.
 
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Reply #52 - Nov 20th, 2007 at 6:09pm

n693w   Offline
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Neil

I'm presently running the EKP-IV in my RV7A with the TruTrak autopilot and the D100 EFIS am somewhat confused of how to wire the Mark IV to the D100.  Can you or anyone out there give me some pointers? 

Thanks for any help

Ron B
 
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Reply #53 - Nov 20th, 2007 at 6:22pm

Dynon Support   Offline
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Split the wire that comes from the AvMap and goes to your TruTrak. Run this wire to pin 22 on the EFIS (which is pin 3 on the PC update port).

That's it. It's really that easy. The D100 will auto-detect the signal and show it to you on the HSI. You can also turn on things like winds aloft if you have an OAT.
 

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Reply #54 - Nov 20th, 2007 at 6:24pm

DougN   Offline
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Florida, US; Zodiac 601 XL

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The way it was done in my airplane is just what is suggested in the Dynon installation instructions: serial GPS to the Dynon serial in. There are additional details depending whether you have more than one Dynon element, and whether you own a Garmin SL30. The install instructions suggest the Dynon elements tied together with the DSAB, and the GPS going to the EMS with the SL30 going to the EMS.

For the TruTrak, split the GPS signal and pipe it to both the dynon receiver and the TruTrak.

Pay attention to the baud rates selected. The EKP-IV only has 4800 baud. Ensure you set the TRuTrak to 4800 baud (hold the "mode" button until it goes into the setup mode, then "next" until you find the place to set the baud rate).

The Dynon auto-recognizes the baud rate, so nothing to do there.

On the EKP-IV, hit menu twice to get to the main menu, then choose "communications." Set NMEA to "on"; then choose RMC, RMB, and APB msgs (you can choose either APB or another I can't remember off-hand).

Take my instructions with a grain of salt; while I think they are close, I'd strongly suggest you read the install manuals for all the devices and plan accordingly.

Best of luck.
 
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Reply #55 - Nov 21st, 2007 at 10:08am

n693w   Offline
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Thanks gents for the help on the EKP-IV -  Dynon D100 hookup.  I'll give it a try soon.

Again thanks

Ron B
 
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Reply #56 - Nov 30th, 2007 at 9:16am

rngaines   Offline
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The new AvMap software works well.  It was posted on AvMap page within the last two weeks.   The communications set up page should be set to "processed".  That makes  the direction info going to the Dynon in magnetic. 

I get the appropriate presentation on winds aloft/direction/speed.  The Dynon HSI page works well.

« Last Edit: Nov 30th, 2007 at 9:18am by rngaines »  
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Reply #57 - Nov 30th, 2007 at 12:07pm

DougN   Offline
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Florida, US; Zodiac 601 XL

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Are you sure it should be set to "processed"? That is a fix for a particular autopilot (navaid I believe) which was having problems. The folks in the AvMap US office (specifically Dan Lyons) didn't mention this as a parameter to use for other than that set of issues.

Having said that, I haven't looked at the differences in output from the AvMap when either is selected, so I don't know what they are (could be something subtle). I too have upgraded and am getting correct winds aloft info; and I don't it set on "processed".
 
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Reply #58 - Nov 30th, 2007 at 12:12pm

DougN   Offline
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Florida, US; Zodiac 601 XL

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I just popped a note off to Dan Lyons from AvMap; and I'll post his response when I get it.
 
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Reply #59 - Nov 30th, 2007 at 2:55pm

DougN   Offline
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Florida, US; Zodiac 601 XL

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As promised:
--------------------------
Hello Mr. Norman

The Processed signal was created specifically for the TRIO auto pilot systems. With this system there was a "hiccup" that was causing the AP to lose GPS signal frequently. The NMEA output on the old generation of software (V1.11.50R and prior) was processed before being transmitted to external equipment. Think of it as a CD player in a car: There is a slight delay so that if you hit a bump and the CD skips, the player can have time to correct the data before it is sent to the speakers. The new generation of SW (V2.xx.xxxR) sends the signal directly in an attempt to speed up the transfer. Please note that there were never any complaints about signal interruption on Dynon systems with the new SW, and therefore either setting should function properly. The only complaint we had with the original batch of generation 2 software was that it was not transmitting a magnetic heading when set to do so. Software updates have corrected this problem, and we have had no new complaints.

If helpful I could answer some questions directly from this forum, I would just need to know where to find it.....

Otherwise please feel free to contact me with any questions and I will do my best to help.

Thanks,

Dan.
-----Original
 
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Reply #60 - Dec 1st, 2007 at 12:34pm

rngaines   Offline
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The new version of AvMap software was developed for the TRIO autopilot but it suffered from the same problem as the dynon.  In the data stream where the dynon was looking for magnetic variation there was a blank.  We ran the beta software for AvMap that was written for the autopilot to test it on the dynon.  It fixed the problem.  Instead of a blank in the data stream there is now magnetic variation.   The "direct" setting on NMEA will give the old data stream.  The "Processed" setting gives new information (magnetic heading).  It certainly fixed mine.  I now have good winds data and the HSI presentation is accurate.

I also changed the antenna.  I used a smb-bnc cable and a Garmin GA-56 antenna.  That is the very common external mounted antenna.  Got mine from the local avionics guy (free).  They are removing them from a lot of airplanes now because when the Garmin's are upgraded to WAAS, a new antenna is required.  A bunch of these are on ebay for that reason.  I mounted mine under the engine cowling (behind the baffling using adel clamps attached to the rear cross frame of the engine mount in the "cool" section).  The fiberglass cowling is transparent to gps signals.  I get a much better signal there than I had when the puck antenna was on the instrument panel hood or other places in the cockpit.  It is also nice not to have all of those wires running around the cockpit.  I just have to plug in the AvMap and then attach two short wires (antenna and serial data) which are permanently under the panel.
 
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Reply #61 - Dec 5th, 2007 at 8:37am

jfowler   Offline
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Question:  If I connect a Garmin 96C to pin 22 on the D100, what items will be displayed on the D100?
 
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Reply #62 - Dec 5th, 2007 at 2:45pm

Dynon Support   Offline
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Winds, as well as all of the HSI information overlaid on the DG heading - including CDI, bearing, and a few other bits of information.
 

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