iFly 10.2.75 not receiving GPS postion from Stratux v1.4r5

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iFly 10.2.75 not receiving GPS postion from Stratux v1.4r5

5/6/2018 7:55 PM

ErgonomicMike

Joined: 9/3/2014

Posts: 2102

Re: iFly 10.2.75 not receiving GPS postion from Stratux v1.4r5

You're smarter than I am. I tend to be a bit cavalier in my testing of beta versions. (I had the old Stratux SD card as a backup. But not practical to swap in flight. (Can't reach the Stratux buried behind me.) I've gotten used to things just working and I didn't see any changes in the Stratux that looked like they would cause problems.

Well, the good news is 1) it was VFR day and 2) I have built-in GPS in one of the tablets. (Although not WAAS.)

5/7/2018 7:52 AM

Brian

Joined: 9/7/2011

Posts: 4453

Re: iFly 10.2.75 not receiving GPS postion from Stratux v1.4r5 Modified By Brian on 5/7/2018 10:26:59 AM

EDIT: See Correction below. Stratux does not have a defect; the iFly GPS fix will be included in the next beta release.

Ergo, thanks for the log. Thanks to you (and this log) I was able to debug the issue.

From what I can tell, the Stratux "status message" (type 101) is defective for the new firmware. Byte[3] is supposed to indicate fix type where:

0 = no fix
1 = Fix
2 = Waas

The latest Stratux firmware always sends us "0" (no fix) in this message. I believe this is a Stratux defect. But I went ahead and put in a kludge fix in iFly GPS (might just be temporary) which ignores this "0" for up to 3 seconds, as the Stratux also gives us a proprietary status message which tells us there is a 'fix'.

I believe the correct fix here is for Stratux to fix their message type 101, and set Byte[3] correctly, instead of always showing '0'.

EDIT: This post is wrong, see my next post below for the real conclusion.

Brian Knox, Sr Software Engineer

5/7/2018 10:25 AM

Brian

Joined: 9/7/2011

Posts: 4453

Re: iFly 10.2.75 not receiving GPS postion from Stratux v1.4r5 Modified By Brian on 5/7/2018 10:27:29 AM

CORRECTION - the message type 101, Status Update, is *not* a standard message, and that was the crux of our confusion. For the Stratux, we simply need to ignore this message, and this fix will be in the next Beta Release.

There is nothing that Stratux needs to do here. Their latest firmware is fine.

Brian Knox, Sr Software Engineer

5/7/2018 11:46 AM

ErgonomicMike

Joined: 9/3/2014

Posts: 2102

Re: iFly 10.2.75 not receiving GPS postion from Stratux v1.4r5

Hi Brian:

Sounds like you and Walter went down the same path. (See Walter's posts near the end of https://github.com/cyoung/stratux/issues/710 )

Walter said he had changed the code in iFly in 10.2.3 to ignore the new FF message from Stratux v1.4r5. Maybe his change didn't make it thru?

Anyway, looking forward to the next beta of iFly.

5/7/2018 12:35 PM

Brian

Joined: 9/7/2011

Posts: 4453

Re: iFly 10.2.75 not receiving GPS postion from Stratux v1.4r5

Yes, Walter is the one who set me straight. The reason it wasn't fixed in the last Beta was that I failed to integrate his fix into that build.

Brian Knox, Sr Software Engineer

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iFly 10.2.75 not receiving GPS postion from Stratux v1.4r5

iFly GPS Forum

EDIT: See Correction below. Stratux does not have a defect; the iFly GPS fix will be included in the next beta release.

I believe the correct fix here is for Stratux to fix their message type 101, and set Byte[3] correctly, instead of always showing '0'.

EDIT: This post is wrong, see my next post below for the real conclusion.

Adventure Pilot LLC

iFly GPS Forum

EDIT: See Correction below. Stratux does not have a defect; the iFly GPS fix will be included in the next beta release.

I believe the correct fix here is for Stratux to fix their message type 101, and set Byte[3] correctly, instead of always showing '0'. EDIT: This post is wrong, see my next post below for the real conclusion.

Adventure Pilot LLC

I believe the correct fix here is for Stratux to fix their message type 101, and set Byte[3] correctly, instead of always showing '0'.

EDIT: This post is wrong, see my next post below for the real conclusion.