(27-Jan-2021, 03:00 AM)SnowLeopardFPV Wrote: This has been a bug bear for a lot of people since the last few firmware updates. I have a feeling that DJI don't really care TBH. They've used the FPV community to prove that their FPV product works well enough so it could be incorporated into their own DJI FPV Drone, and my guess is that going forward they will now put most of their time and effort into improving that and just leave the standalone FPV products to stagnate with unfixed issues. I really hope I'm wrong but I guess we shall see in the coming months.

Here's what I don't understand.  My >3 year old Mavic Air can record 2.7K video without a hitch on just about any old SD card.  My GoPro Session 5 can record 4K video without a hitch on any reasonable SD card.  Why can't the Air Unit do at least as well?  I'm not even using it as the RX, because I have Crossfire.  It's frustrating.

(27-Jan-2021, 03:37 AM)V-22 Wrote: Are they connected to dedicated UARTs or are you using softserial? Do any other OSD elements freeze, or just the mAh counter?

Some have reported that a capacitor across the power inlet leads to the Vista/AU prevent these random freezing issues as well.

Dedicated UARTs.  Yes, other OSD elements freeze as well--even the battery voltage.

A capacitor across the power inlet didn't help.  And I tried powering the Air Unit from a dedicated supply on the FC board and also directly from the LiPo, with no change in behavior.  Tried different cabling.  Tried different UART ports.  The problem is in the Air Unit, not in anything external to it.

(27-Jan-2021, 03:59 AM)SJChannel Wrote: Here's what I don't understand.  My >3 year old Mavic Air can record 2.7K video without a hitch on just about any old SD card.  My GoPro Session 5 can record 4K video without a hitch on any reasonable SD card.  Why can't the Air Unit do at least as well?  I'm not even using it as the RX, because I have Crossfire.  It's frustrating.

Maybe it's actually a hardware limitation with the Air Unit's processing trying to do too much stuff at once. The slow SD Card issue only seemed to rear it's ugly head from the point where DJI implemented the OSD communication to Betaflight /INAV. Coincidence or not? No-one knows for sure and DJI just hide in the shadows without being open and honest about what the problem is, or if there is any chance of it getting fixed. You can bet your bottom dollar that they've fixed the issue on the new Air Unit components which reside inside their new DJI FPV Drone. So it may require a new standalone Air Unit V2 to fix the issue once and for all, but there are no signs of such hardware being released anytime in the near future, if ever now that the DJI FPV Drone exists and their attention is focused on that. All we can only sit back and listen to DJI's silent responses to their customer feedback. This is one of the prime reasons that some people hate DJI so much.

DJI have supposedly said that they will continue supporting the Air Unit and Caddx Vista with further firmware updates, but that isn't going to be until some time after the DJI FPV Goggles V2 and the DJI FPV Drone have hit the market. So all we can do is to wait and hope.

Until recently my dji osd has been working fine.

Last couple of flights the osd elements are moving around the screen while flying. Batt voltage moves from center of osd to top left corner then will move back to original spot.

Before I knew I had an issue I’m flying around thinking I had a super battery because the voltage froze on the osd.

Thankfully I landed before the limo died. No sd card was installed when I fly.

Not to happy with the osd for sure.

Aldo

Does it normally work? Yes. Does the MaH reading freeze up sometimes? also yes, but it's pretty rare. I voted that it's not reliable because I've experienced it on more than one occasion. It doesn't happen enough for it to bother me though. Also, I really hate how the gps satellites indicator is frozen until it gets a lock. I never know how long it's going to take or how close I am to getting that first lock.

ohh and this is using a caddx vista btw. I used to have a ton of problems with the air unit stopping recording during flight before the latest update for my other drone though, I haven't had any issues since but I also don't fly it nearly as much.

(27-Jan-2021, 10:34 AM)SnowLeopardFPV Wrote: Maybe it's actually a hardware limitation with the Air Unit's processing trying to do too much stuff at once. The slow SD Card issue only seemed to rear it's ugly head from the point where DJI implemented the OSD communication to Betaflight /INAV. Coincidence or not?

I think that's when the OSD stuttering issue appeared, as well.  I've given a lot of thought to the question of what could explain the stuttering.  For me, at least, it never stutters at the beginning of the flight.  When it happens, it starts at least 3-4 minutes into the flight.  That could be explained by a thermal problem; i.e., the processor gets too hot and throttles down to a slower speed, after which it can't keep up.  That's a hardware problem and probably a design error.

Another possibility is a memory leak, i.e., the software allocates some memory for temporary use and then fails to free it up when it's finished with it.  So eventually there is no more free memory left.  That's a software bug that DJI ought to be able to fix with a new firmware release.

I'm tempted to try downgrading my firmware to a pre-custom-OSD version (if that's possible) to see if the problems go away.

(28-Jan-2021, 01:27 AM)SJChannel Wrote: I'm tempted to try downgrading my firmware to a pre-custom-OSD version (if that's possible) to see if the problems go away.

Yes, you can actually downgrade the firmware to an earlier version. At least DJI didn't stop you doing that (yet). Unfortunately it also means you will lose the 50Mbps option by going back to an earlier version, and some of the image freezing and blackout issues may start happening again which was a problem on some earlier versions of the firmware. So just make sure you don't fly too far away if you try doing that.

(28-Jan-2021, 10:01 AM)SnowLeopardFPV Wrote: Yes, you can actually downgrade the firmware to an earlier version. At least DJI didn't stop you doing that (yet). Unfortunately it also means you will lose the 50Mbps option by going back to an earlier version, and some of the image freezing and blackout issues may start happening again which was a problem on some earlier versions of the firmware. So just make sure you don't fly too far away if you try doing that.

*sigh*

I think the next few months are probably going to prove whether or not DJI really care about the (real) FPV hobby, or if they are only really interested in making sure that their own consumer products (as in the DJI FPV Drone) are working the way they should. If DJI come out with some firmware updates for the standalone FPV products that aren't just lip service and which really do address all of the issues and feedback that the (real) FPV hobbyists have been shouting about for who knows how long, then maybe we can start to give them some benefit of the doubt. Until then, as always, I will continue to be sceptical about any future intentions that DJI have of supporting the (real) FPV hobby in the long term.

What your describing concerning the DJI Air Unit, sounds like the Air Unit video processor chip has too little Ram/ internal cache for the workload it has. So it has to use an SD Card as an external ram source (which explains the frequent read/writes requirements). This all culminates into us having to buy specific SD cards that can handle the "external ram/cache" role in order to get the DVR function to work. At least that's my take on all this.

I was having problems with my OSD with kakute F7 HDV with Caddx Vista and the plug going from Caddx Vista to kakute F7 HDV AIO was plugged in but one of the pins wasn’t pushed in all the way even through the plastic plug clicked in and was locked into place one of the tiny pins wasn’t going all the way in.
I took a small round piece of music wire and pushed the pin all the way in.
I seen another have connector issues with Kakute F7 HDV AIO and it worked before but then started acting up.
It’s not the best plug and when the F7 HDV AIO came out it was one of the first plug and play types.
I’d rather solder to pads to avoid these types of problems unless the connectors are seated in properly and this connector was brand new and looking like it plugged into place even clicking and locked in but the one female pin was too snug and would let the connection seat.
I have wiggle on plug and there’s some slop in the design.
I got lucky and traced it with voltage meter but it wasn’t visible.