Markmp

One more update - I saw the bug again today even though I was on iOS 11.2.5, so I no longer think iOS was the issue. I didn't follow my own procedure though, and connected via Bluetooth before a position was achieved by the GTN650. Same as before - GPS position jumping all over. Worse, I was trying to use the GTX345 attitude indicator in some backup instrument practice. The AHRS didn't work at all. Anyway, in the air I killed foreflight, disconnected BT, turned BT off, then on, and then reconnected and re-started foreflight. Issue went away and AHRS was working. Need to file a bug with Garmin. Reminds me of the magic Bluetooth foo I needed when using the DualXPS GPS puck about 6 years ago. Garmin should have just used Wifi like the Stratus - never had a single connection issue with Stratus in 4 years.

This is definitely confusing - I emailed Avidyne directly in September 2017 and got this response from their sales engineer Dale Ferrer indicating they are not fully compatible: The transponder you are describing sounds a lot like the NGT-9000, the GTX is similarly priced. Ultimately the answer is yes the GTX345 will integrate but doesn’t have full functionality. If you want all of the benefits of GTX345 to display on the 440 it won't happen, the NGT-9000 will do all of those things. The Skytrax only displays on the IFDs, it will also display on the IFD100 app but won't do the rest. As far as the autopilot you will have to ask the shop, we usually recommend an Aspen but there are other options. Dale Ferrer Avionics Technical Sales Engineer Avidyne

That's a good step if true - but last year it couldn't then send this info onto Foreflight, which their website still seems to confirm: https://support.foreflight.com/hc/en-us/articles/218282278-What-capabilities-does-the-Avidyne-440-or-540-system-provide-ForeFlight- One other thing - in an old forum post someone said you can integrate with GTX but not at same time as a glass replacement like Aspen (it's either or) - do you know if that's true?

I had to make exactly the same decision a few months ago for our M20J panel. We previously had a 430 (non-waas) GPS. I ended up going with a GTN650 + GTX345 for ADS-B. Super happy with them both. I researched this to death and attached the full note to my partners below with the details (about 4 months old). Baseline, the Avidyne and GTX are "compatible" - but don't fully talk to each other and also Foreflight (iOS) + Garmin Pilot (android). After talking to 5 avionics shops, no one had done this combo or really knew how to get weather + traffic on IFD and also tablets. Further, I really wanted the GTX-345 because it had a backup attitude indicator that can be viewed in Foreflight or Garmin Pilot. From a cost standpoint - the IFD is supposed to be a 'slide in' replacement on the 430, saving install dollars. But no shop I talked to would do this - they each said they've seen enough problems they only install with new mount and won't reuse the 20 year old 430 wiring harness. And since the 430 I had wasn't waas, I needed a new antenna setup anyway. I quoted 5 shops and the IFD+GTX345 solution was always a couple hundred bucks more than the GTN650+345. If you do a trade-in the shops will probably not give you good money for the 430. I had them 'yellow-tag' the 430 with the FAA return to service form (1 hr labor), and sold it on Ebay for $4800 (net after fees about $4200). As far as interface goes - I liked the IFD a lot. But the GTN650 touch interface is soooo much better than the 430 interface I think it's really splitting hairs. Foreflight is working fine. I get weather + traffic + position + ahrs with no problem (but see my previous post in this forum about BT issues pre-iOS 11.2.5). One other nice thing - I can get monthly NavData updates from Garmin for entire US for $299/year. Previously, we were paying Jeppesen the same amount for US-West only for our 430. Also, I can now do coupled approaches ILS/GPS with our KAP150 auto-pilot. Good luck! Mark ------ Previously, we did a lot of research and got quotes for two main GPS units that could replace the 430. Mainly, the Garmin GTN650 and the Avidyne IFD440. We also researched and proposed the GTX-345 transponder from Garmin. Here are some more details of these combinations: One previous proposed setup, the Avidyne IFD440 + GTX345 is not an ideal setup 1) not recommended by avionics shops (no one I talked to ever did this combo). A few actively discouraged it because of differing manufacturers. 2) Limited connectivity - e.g. can show traffic on IFD but not weather. (However, the GTX can get GPS from IFD. ). A few folks on forums confirmed this is possible, with some setup time. But no tablet app I know besides Avidyne iOS IFD100 can get weather+traffic directly from IFD. Foreflight will talk to a GTX for weather + traffic, but not the Avidyne IFD440. Here are the two remaining options: Option 1) Garmin GTN-650 (GPS) + GTX-345 (ADS-B in/out) Pros: -Known install with track record of many successful installs, and well-supported (Aerial said they’ve done a lot of these) -GTX345 provides weather, traffic, and backup attitude (AHRS) to Foreflight (iOS) and Garmin Pilot (iOS/Android) -GTN650 will receive weather + traffic from GTX. It can also send GPS to GTX so we can get the cheaper 345 transponder model (without built-in WAAS or another antenna) -Can optionally add a FlightStream 510 ($1k drop-in SD card) at a future date to enable tablets to send/receive flight plans, and also to wirelessly update GTN650 databases from tablet. Cons: -Touch-only interface better than 430 (according to forums), but still not as intuitive as Avidyne or others -Limited app support -although GTX345 will do iOS and Android, only Foreflight (iOS) and Garmin Pilot (iOS/Android) are supported directly through GTX. If we wanted to get the Avidyne IFD440, then nearly everyone I talked to (forums, avionics shops, avidyne) recommended the L3 Lynx NGT-9000 for the transponder. It looks like a great unit that does a lot of what we want, but is more expensive and lacks the AHRS attitude backup. Here are the details: Option 2) IFD440 (GPS) + Lynx NGT-9000 (ADS-B in/out) Pros: -Very well regarded hybrid interface (button + touch) and very positive feedback in forums and by suppliers/installers -Lynx 9000 has option for “active traffic”, which shows all traffic with basic Mode-S transponder, not just ADS-B out airplanes -Lynx 9000 has Wifi that will talk to many apps (iOS + Android) for weather + traffic (Foreflight, etc) Cons: -Connecting to IFD directly (rather than through Lynx) won’t show weather or traffic yet on Foreflight, only through IFD100 iOS app -More expensive (probably at least $1k-$2k) -No backup attitude indicator. We would need to add a G5 or similar if we wanted attitude backup (+$3k). -Although supposedly a drop-in replacement for the 430, the shop we quoted still replaces all wiring and won’t offer savings

Ok - here's an update. Today I updated my iPad Air OS to version 11.2.5. Also, Foreflight recommended *not* turning the iPad on to connect bluetooth until after the GTN/GTX is fully booted and obtained a position. They said sometimes connecting via Bluetooth before it obtains a GPS fix can cause issues. Not sure which of these changes had the impact - but I did not see any issues today during a flight and GPS position seemed to work fine with no lags/jumps that I noticed. FWIW, the SW version of the GTN is 6.41 and GPS Version is 5.2. I don't know the FW version of the GTX though.

Are you connecting to the GTX 345 directly or do you have a Flightstream 510?

Good data point. What ipad and ios version? Any idea the software version in your GTX 345?

Does this mean that the problem would also appear on Garmin Pilot when used on the iPad (vs. Android)?

I did ask Foreflight and just got a somewhat generic BT error response. I haven't been able to try any of this yet, but frustrating that to get position you might need a magic BT startup incantation. Thanks for your email. I would like to pass on to you some steps which you may find beneficial as a "workaround" for the issue you are having with your GTX 345 and its connectivity to ForeFlight. I encourage you to give these a try and please report back to us if you see improved performance and/or resolution of the issue. 1. When starting up your avionics console (which includes your GTX 345 and any other connected avionics devices), please allow for full start-up and capturing of GPS signals and ownship location before pairing/connecting your iPad or iPhone device to the panel. We have seen instances where an early Bluetooth connection of the device to the GTX 345 has created some issues. 2. If you continue to have data connectivity or feature issues (eg. AHRS not showing up on ForeFlight) and Step #1 above did not work, go to SETTINGS on your iPad or iPhone > BLUETOOTH > and turn off the Bluetooth connection, then turn it back on. 3. As a last resort (and this is more difficult), on your iPad or iPhone, go to SETTINGS > BLUETOOTH > select the GTX 345 Bluetooth connection > and tap Forget This Device. Then re-pair your connection to the GTX 345 with a fresh Bluetooth connection. Give that a try and let us know if you have any success with these steps. We look forward to your response so we can assist further in resolving this issue.

Yeah - I tried that and a few other combos. Unfortunately doesn't seem to make any difference.

Recently did a panel upgrade on my M20J. Thanks to this forum, ended up going with a GTX345 for ADS-B and a GTN650 for WAAS. I've been using Foreflight for years with a Stratus with no issue. However, with the new panel I am having a annoying GPS position issue when I connect to my new Garmin GTX-345+GTN650 using Bluetooth. The GPS position that I see on my Foreflight map is very 'jumpy' and seems to lag my position. As I'm flying, my position seems stuck for a few seconds - then will very quickly move/jump to a new location, or then jump back. Often it's moving/jumping over 1cm on the map at a time, which can be over a 1 nm! (I'm using a Wifi-only iPad Air) This is a new phenomenon. For years I have been using my Stratus 2S via Wifi to the same iPad without any issue. As a test, I went back to my Stratus and it worked fine and I never saw any issue with position. I'm not sure if new issue is with Bluetooth or something specific to our Mooney's Garmin 345+GTN650 setup. It's happened on multiple flights weeks apart. We just did a $20k upgrade on this panel - but I can't seem to get a reliable, smooth, position using this new setup with Foreflight. The position seems fine on the GTN650 screen though - so I don't think it's a GPS issue. I fly in very crowded SFO airspace and this is very disconcerting. Anyone else report a similar issue with GTX345+GTN650 and Foreflight? Any ideas on mitigation? It's not very confidence inspiring.

In receiving quotes from a few avionics shops for a GPS+ADS-B upgrade, I've noticed some shops say I need a separate altitude encoder, specifically the GAE-12 to work with the proposed Garmin GTX345. Other shops say I should get the ACK A.30 encoder. Some shops say I don't need either with the GTX but I can install if I want to. Can someone shed some light on whether I need a separate encoder or not, and which one is appropriate? (and why?). Assume a GTX345+GTN650 setup. Thanks!

Hi, I've been looking at getting the Garmin GTX-345 for ADS-B. I see that it connects via Bluetooth - does that mean it can only pair with one tablet at a time? One benefit of my Stratus2S is that it's Wifi - and talks to multiple devices simultaneously. I'm not sure if that can be done with the GTX345 since it's Bluetooth. For those in the know, does the GTX work over classic Bluetooth where you pair outside the app? Or does it work over Bluetooth LE (4.0) protocol that can be connected through the app automatically with no extra steps? Thx!

I own a Mooney M20J (1985) with a few partners and we're looking to do ADS-B and upgrade our GPS. We currently have a non-waas Garmin 430 and have been considering an update to a GTN650 or an Avidyne IFD440. We like the interface and hybrid (buttons+touch) of the IFD440 - but we can't figure out if it will talk to a Garmin GTX 345 transponder. I talked with several avionics shops and I got conflicting answers: A) no somewhat, you can only feed waas to the GTX from IFD C) yes, GTX can get waas from IFD, and IFD can get traffic + weather from GTX An Avidyne sales support engineer thought you could get traffic but not weather from GTX to IFD. So which is it? Has anyone actually gotten this working in a real setup? If this does work - how do you iPad/Android users connect to the IFD? Foreflight says it only gets position and can exchange flight plans with IFD - no weather or traffic. So if I connected to GTX for all that, can I not get GPS signal? Seems awkward to have to switch connections back and forth connecting to IFD and GTX separately. Two shops advised against doing this setup - others said no problem at all. Also, a few shops I talked to said they don't do a slide-in replacement for IFD even though we have a 430. They said they redo all wiring anyway because of issues they've had in past. So no savings there. Basically, what we're trying to achieve is: 1) dual band traffic (978 + 1090) + weather displayed on GPS and also portable tablet (ios or Android), ideally including Foreflight and Android apps like FlyQ etc 2) ADS-B with 1090 ES out for international compliance 3) Backup attitude indicator that can be displayed on tablet (e.g. in foreflight or FlyQ) 4) GPS should drive our KAP150 autopilot Let me know if anyone has actually gotten a IFD440+GTX345 setup working. We also looked at SkyTrax100 + 340 for ads-b, but SkyTrax doesn't seem to do dual-band (978 only) traffic and can't pick up 1090 traffic without a relay from a ground station. But I'm finding it harder to make a case for doing IFD440. Looking more likely to do GTX345+GTN650+FS510 thoughts?