Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

GPS NMEA data transfer to the autopilot

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> Europa-List
View previous topic :: View next topic  
Author Message
raimo.toivio(at)rwm.fi
Guest





PostPosted: Wed Feb 04, 2009 10:35 am    Post subject: GPS NMEA data transfer to the autopilot Reply with quote

All who have been there

I am just now connecting my autopilot (Trio) to GPS (Garmin 296).
Doing it in a hangar - no seenable satellites.

Question: when GPS is in a simulation mode, is there NMEA 0183 data out then?

I have tried data out 1 /violet wire /com 1 and data out 2 /blue wire /com 2 but "No GPS" message in autopilotīs display. Tried also all the possible NMEA "advanced settings".

Any ideas? Should I find an oscilloscope? Cannot go out to find real satellites...

Thanks, Raimo
OH-XRT


- The Matronics Europa-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List
Back to top
pete(at)lawless.info
Guest





PostPosted: Wed Feb 04, 2009 10:50 am    Post subject: GPS NMEA data transfer to the autopilot Reply with quote

Hi Raimo

There is non from my 496 in simulation mode so I would assume the 296 is the
same.

Pete

--


- The Matronics Europa-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List
Back to top
raimo.toivio(at)rwm.fi
Guest





PostPosted: Wed Feb 04, 2009 11:29 am    Post subject: GPS NMEA data transfer to the autopilot Reply with quote

Pete,

thatīs good to know, thanks. Strange why there is not?

I have to obviously find an external antenna with 30 feet cabel to see real satellites and test NMEA trafic.

***What about Garmin NMEA then when GPS unit is not moving actually any knots?

For example King KLN-XX models will not output a valid data link signal until a certain groundspeed has been attained.

Wanna be sure about my connections before closing my panel.

It has been said many times but again: this forum is great. And fast!

Raimo
---


- The Matronics Europa-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List
Back to top
jeff(at)rmmm.net
Guest





PostPosted: Wed Feb 04, 2009 11:31 am    Post subject: GPS NMEA data transfer to the autopilot Reply with quote

Ramio,
You will need a satellite signal to test it. Mine wouldn't work with
the GPS in it's simulation mode. I too have a trio and it works great
but... I had a lot of intermittent trouble of losing the GPS NMEA
output signal. After changing out the head of the autopilot and the GPS
and all the wiring and flying without it for months it became apparent
that I needed a ground. The instructions said if your GPS power is
coming from the plane then you didn't need the ground for the auto
pilot signal. But I think they we're just so use to putting these
things in metal planes.
Anyway I take my signal from an av-map 4 so it's NMEA out was a yellow
wire only. Once I ran a signal ground everything worked perfectly.
Get it working because the product is a very good and the support from
them is even better.

Jeff R.
A258 - N128LJ / Gold Rush 176 hours and climbing slowly. Down for
annual and mods.

On Feb 4, 2009, at 12:34 PM, Raimo Toivio wrote:

Quote:


All who have been there

I am just now connecting my autopilot (Trio) to GPS (Garmin 296).
Doing it in a hangar - no seenable satellites.

Question: when GPS is in a simulation mode, is there NMEA 0183 data
out then?

I have tried data out 1 /violet wire /com 1 and data out 2 /blue wire
/com 2 but "No GPS" message in autopilotīs display. Tried also all the
possible NMEA "advanced settings".

Any ideas? Should I find an oscilloscope? Cannot go out to find real
satellites...

Thanks, Raimo
OH-XRT




- The Matronics Europa-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List
Back to top
raimo.toivio(at)rwm.fi
Guest





PostPosted: Wed Feb 04, 2009 12:05 pm    Post subject: GPS NMEA data transfer to the autopilot Reply with quote

Jeff, thanks for support!

Do you remember did you connect Trioīs pin 8 which is black and twisted with green (pin 7) to the plane ground or to the GPS Data In TXD or both? This question is really confusing also me.

As you said Trioīs support is great but they cannot help me because they have a wrong (old) wiring diagram for Garmin 296. Obviously 296 is only Garmin model using violet wire to the NMEA output - all the other use blue one they say.

Raimo

My plane looks now like it has never been airborne (and never will) ;(((

---


- The Matronics Europa-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List
Back to top
jeff(at)rmmm.net
Guest





PostPosted: Wed Feb 04, 2009 12:43 pm    Post subject: GPS NMEA data transfer to the autopilot Reply with quote

Raimo,
I used my navaid servo so I had a harness to wire to but the same data
eventually goes to the same pin on the trio head. My notes say that
the GPS or NMEA out signal is to go into pin 7 on the head. The ground
coming from the GPS is to go to a ground then to the black wire only
and it goes to pin 10 on the trio head. The servo ground goes to pin 9
on the head as they are separate. I see nothing about twisting two
wires together or using pin 8. I'm assuming you have the wiring harness
from trio that has the head connector wired but the other end is the
exposed wires right?
Jeff R.
A258 - N128LJ / Gold Rush 176 hours and climbing slowly.
On Feb 4, 2009, at 2:07 PM, Raimo Toivio wrote:

[quote]

Jeff, thanks for support!

Do you remember did you connect Trioīs pin 8 which is black and
twisted with green (pin 7) to the plane ground or to the GPS Data In
TXD or both? This question is really confusing also me.

As you said Trioīs support is great but they cannot help me because
they have a wrong (old) wiring diagram for Garmin 296. Obviously 296
is only Garmin model using violet wire to the NMEA output - all the
other use blue one they say.

Raimo

My plane looks now like it has never been airborne (and never will)
;(((

---


- The Matronics Europa-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List
Back to top
pete(at)lawless.info
Guest





PostPosted: Wed Feb 04, 2009 1:11 pm    Post subject: GPS NMEA data transfer to the autopilot Reply with quote

Raimo

The 496 feed is there all the time when it has a valid signal. The over a
speed bit is only for recording airborne time on Garmin as far as I am
aware.

Why no feed in simulation mode? Well suppose the autopilot followed a
simulated signal? There are plenty of people out there who are stupid
enough to sit and let it!

Regards

Pete

--


- The Matronics Europa-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List
Back to top
raimo.toivio(at)rwm.fi
Guest





PostPosted: Wed Feb 04, 2009 1:41 pm    Post subject: GPS NMEA data transfer to the autopilot Reply with quote

OK Pete,

Now I have a road to go further in this adventure, thanks!

"Why no feed in simulation mode? Well suppose the autopilot followed a
simulated signal? There are plenty of people out there who are stupid
enough to sit and let it!"

But there is a warning " do not use simulation mode for navigation purposes"...

Raimo

---


- The Matronics Europa-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List
Back to top
raimo.toivio(at)rwm.fi
Guest





PostPosted: Wed Feb 04, 2009 2:07 pm    Post subject: GPS NMEA data transfer to the autopilot Reply with quote

Jeff

"I'm assuming you have the wiring harness
from trio that has the head connector wired but the other end is the
exposed wires right?"

Yes I have and in my Trio wiring diagram pin 10 is for servo cableīs shield,
not for GPS ground. Servo ground is pin 9 like yours.
They are also connected together in the servo connector.

Gold servo and Navaid servo diagrams are same when looking connector J1.
Servo connector diagrams are different: Navaid has three and Gold has four but green one is unconnected.

NMEA out to pin 7 like you wrote.
GPS data ground to pin 8.

I assume "GPS data ground" is same as Garminīs GPS data in TXD?

I hope I had problems only because I assumed (Garmin) GPS simulation mode is ok for testing NMEA.

Thanks, Raimo (who said this should be easy for "a man in the deep forest")

---


- The Matronics Europa-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> Europa-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group