stratux
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cyoung
GDL39
If anyone is interested in implementing GDL39 -
http://www.chartbundle.com/tech/gdl39/
Interesting paper: http://cseweb.ucsd.edu/~savage/papers/CCS14MobileCockpit.pdf
I assume, in addition to the coding for encryption and handshake, this would also require Bluetooth support- yes?
I think so - there are some avionics that take only GDL39 over serial also. In terms of using it for Garmin Pilot it's probably bluetooth only.
I'm told that Garmin encrypts their transmissions, at least over the air. Haven't heard about direct wired.
Skypuppy7
On 10/20/2015 07:25 AM, cyoung wrote:
I think so - there are some avionics that take only GDL39 over serial also. In terms of using it for Garmin Pilot it's probably bluetooth only.
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It uses blowfish encryption with a key that is negotiated in the handshake, the above link describes it.
If they wanted to compress the data interchanges, that's one thing. But encrypting it is downright
The GLD39 looks pretty straightforward and interesting. The paper is very interesting, and I agree that security between devices would be a great idea. Of course it requires agreement on the approach between the app and the device makers. BTW: the Garmin approach to security from looking at the GDL39 code is embarrassing. I'm starting to get the impression Garmin doesn't care. :)
What I'd love to see would be GDL-39 serial output so I can use Stratux to display traffic and weather on my Garmiin 696, instead of having to buy a GDL-39 to do it. Anyone with a Garmin x96 GPS -- and there are a lot of them out there -- could benefit from it.
My coding skills are limited, otherwise I'd take a whack at it myself. It's one of those things that doesn't look terribly difficult, but is beyond my abilities.
As with n980km, i'd like to see GDL-39 serial output so I could feed a Garmin handheld. In my case an Aera 660. I know many pilots with Aeras (500, 510, 550, 660, 760) and they have all been following the Stratux development and would all like to see this capability.
Hello, Did you succeed to write something ? It can be a great feature and I will be happy to provide help testing/debugging. Thank you
Does anyone own a GDL 39 (preferably 3D) who would be willing to provide a few minutes of a bluetooth packet capture?
Here's a reference on how to collect the traffic: https://www.nowsecure.com/blog/2014/02/07/bluetooth-packet-capture-on-android-4-4/
I don't own a GDL39 but have an Area 796 with old Zaon connected to it via serial connection. Let me know if I can help in any way.
The flight schools planes I rent now have GTX 345's which can all talk to ForeFlight (and Pilot) via the built in Connext link. I assume that's the same protocol data as the GDL 393D. I can work on capturing steams from that, probably just via a laptop, because laptops. I'll just use Wireshark unless someone has a better suggestion.
@lukepalmer, the bluetooth protocol has been documented previously... See the link in the FP. Implementing Connext would only help people who are buying new Garmin hardware. The goal with supporting GDL39 would be to support all of the existing Garmins in the field that can receive GDL39 data. If you can afford new Garmin hardware that talks Connext, you probably don't need a Stratux.
If all of the GDL39 (or Connext otherwise) is fully documented, then our job is done. It's just implementation work. If not, let me know, happy to capture streams to aid in full understanding the protocols. Of course we're borrowing GDL39s (or Connext setups) to get this data so the Stratux can act as a GDL39 (just like emulating Stratus). Obviously if we have either of those devices we don't need Stratux. :)
@Snowflake6 I'm not aware of any work on the 3D variant (with AHRS). Would be great if you know something I don't though! The thing that makes this interesting would be using Stratux with Garmin Pilot.
However: I think I've managed to get my hands on one. I'll work on getting a dump to post here.
@lukepalmer Personally I would consider the AHRS to be a bonus... I'm more interested in getting traffic and weather onto my Aera 660 without buying a GDL39 or an XM subscription.
We really need to get a hold of a GDL39. I was working on this months ago but I wasn't able to make any headway due to not having captures from a GDL39.
On Tue, Jun 13, 2017 at 12:05 PM, Rob [email protected] wrote:
@lukepalmer https://github.com/lukepalmer Personally I would consider the AHRS to be a bonus... I'm more interested in getting traffic and weather onto my Aera 660 without buying a GDL39 or an XM subscription.
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I am also very interested in getting the GDL39 protocol to work (to feed Garmin Pilot). Unfortunately, I do not have access to a GDL39 source device. Please let me know if there is any way to support the development activities either by coding or testing.
Maybe I should just buy one with a good return policy :)
On Fri, Jun 16, 2017 at 11:07 AM, Thorsten Biermann < [email protected]> wrote:
I am also very interested in getting the GDL39 protocol to work (to feed Garmin Pilot). Unfortunately, I do not have access to a GDL39 source device. Please let me know if there is any way to support the development activities either by coding or testing.
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The one I just ordered was from eBay. It wasn't cheap, but it surely wasn't near full price!
On Fri, Jun 16, 2017, 11:42 jamez70 [email protected] wrote:
Maybe I should just buy one with a good return policy :)
On Fri, Jun 16, 2017 at 11:07 AM, Thorsten Biermann < [email protected]> wrote:
I am also very interested in getting the GDL39 protocol to work (to feed Garmin Pilot). Unfortunately, I do not have access to a GDL39 source device. Please let me know if there is any way to support the development activities either by coding or testing.
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Got my GDL39 today. Here's a bluetooth capture from my living room. As such, it's just GPS and air-to-air traffic (mostly 1090 traffic out of Midway and Ohare).
https://drive.google.com/file/d/0B5KKdvTfqQ4vN2VmbHhmOHk0SXc/view?usp=sharing
Here's a trip I took over the weekend. It should have everything: all forms of traffic, weather, GPS, and a couple of Garmin Pilot/GDL39 handshakes.
https://drive.google.com/file/d/0B5KKdvTfqQ4vWENjSmNMZGJIZ1U/view?usp=sharing
Android has a built-in Bluetooth capture facility in the developer menu. Those logs will open in Wireshark.
On Fri, Jun 30, 2017, 17:11 jamez70 [email protected] wrote:
What did you use to capture?
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@kdknigga From your coordinates, it appears you live about 5 miles from me. Maybe we should just get together sometime?
@jamez70 Sounds good to me.
On Fri, Jun 30, 2017, 17:18 jamez70 [email protected] wrote:
@kdknigga https://github.com/kdknigga From your coordinates, it appears you live about 5 miles from me. Maybe we should just get together sometime?
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any update on this? Loving my Stratux but I like using garmin pilot as well as foreflight. Wish I knew more to help this along.
