Hi,
How should I react when I loose RC connectivity with the AC?
Today I had this issue (although I don't understand why - I was within 200m range, no interference, full charge, etc.) - the AC returned home and just hovered above my head for 20 minutes. During this time I couldn't do anythig... but wait until the batteries were drained the the AC will fall?

What are best practises for a situation like that? (Please note I am new to flying drones and this was my 4th-5th flight.)
Regards,

Try restarting DJI GO. Try Sport Mode.

What is your RTH operation set at? You have read the manual and know how to set it up yes???

Marty Markoe Posted at 2017-12-20 04:15
Try restarting DJI GO. Try Sport Mode.

Are you serious???

You have to setup RTH protocol in app, as far as telling the drone what to do when returning home. Something I strongly suggest especially because you’re a new flyer. Maybe watch a few tutorials.

Hope that you have a strong GPS connection and have set your failsafe to RTH and the RTH altitude to be higher than the obstacles within the flight route back to the home point. Then all you have to do is sit tight and keep your fingers crossed...

A CW Posted at 2017-12-20 05:07
Hope that you have a strong GPS connection and have set your failsafe to RTH and the RTH altitude to be higher than the obstacles within the flight route back to the home point. Then all you have to do is sit tight and keep your fingers crossed...

Hi,
The question here was not why the AC does what it does - RTH works as expected. The question is - what can I do when all connectivity to AC is lost (RC).

Note that I didn't use the mobile so suggestion to restart DJI4 Go or turning on sport mode is...

Regarding GPS - that could actually be a valid point - but the last number next to the GPS icon I remember was 24 and I was in optimal conditions (good weather, zero interference, 360 view of sky, etc.)

Is disconnection of RC during a flight something that happens frequently?

Icarus77 Posted at 2017-12-20 06:32
Hi,
The question here was not why the AC does what it does - RTH works as expected. The question is - what can I do when all connectivity to AC is lost (RC).

With all due respect your RTH is not working correctly if the drone is hovering above your head for 20 minutes - the landing sequence is part of the RTH.
RTH is controlled by GPS/GLONASS satellite navigation and your home point needs to be set prior to take off. I would always use a device with my RC so that I know these settings are in place as part of my preflight checks. RTH fails when the GPS signal is weak or lost. The most satellites is typically 20 and it's the bar rather than the number you should go by.
RC disconnections are very rare - in fact, it's never happened to me on more than 1,000 flights with multiple DJI drones that I have owned.

Simmo1 Posted at 2017-12-20 04:29
Are you serious???

Restarting Go 4 can often help with weirdness when you know the bird is in range. Of course, Sports Mode won't help when there's no connectivity.

Icarus77 Posted at 2017-12-20 06:32
Hi,
The question here was not why the AC does what it does - RTH works as expected. The question is - what can I do when all connectivity to AC is lost (RC).

I would have rebooted the remote while the Mavic was hovering to see if the devices could reconnect.

I can't remember if you get any sort of warning on the remote when there's interference as you do when tethered to a phone or tablet -- did you see any such warning?

Some folks have regained lost connections by moving towards the location of the Mavic, either by getting back into range or out of a blocked/dead/interference zone, but that wouldn't have helped you in this case.

Ex Machina Posted at 2017-12-20 08:14
I would have rebooted the remote while the Mavic was hovering to see if the devices could reconnect.

I can't remember if you get any sort of warning on the remote when there's interference as you do when tethered to a phone or tablet -- did you see any such warning?

This is exactly what I did - I have rebooted (switched it on/off) few times while the AC was hovering just 2m away from me (could not think of nothing else to do).

I didn't see any warning on the RC - and I didn't have the mobile attached.

Since, this is so rare - I'm thinking if I should replace the RC or not... I don't have too much flight time to see if this was just a one-off issue or not.

Icarus77 Posted at 2017-12-20 08:37
This is exactly what I did - I have rebooted (switched it on/off) few times while the AC was hovering just 2m away from me (could not think of nothing else to do).

I didn't see any warning on the RC - and I didn't have the mobile attached.

The remote by itself might not be cable of alerting users to interference problems, though I would expect it to -- it certainly is capable of alerting NFZ restrictions.

Did rebooting the Mavic solve the problem? If so, the issue may be in the Mavic instead of the remote.

FWIW I've never lost flight control connectivity except from signal blockage, but then I've never flown w/o an attached mobile device.

20 mins hovering?, (if enough battery life) try rebooting the RC and hit the 'RTH' button on the RC. It'll start coming down. Always make sure you have plenty of battery juice on both RC, device and AC.  

How does connection become loose ? You mean the cable became disconnected?

Also, both antenna should be pointed UP. Perpendicular to the remote.

Hi,
Again - I didn't use mobile so no cables involved...
Anyway - I would like to view some log files from this flight to further diagnose the case.
Will need to find out how to do that - (currently getting: Export failed! from DJI Assistant2 when trying the Black Box Save option)

Icarus77 Posted at 2017-12-20 23:34
Hi,
Again - I didn't use mobile so no cables involved...
Anyway - I would like to view some log files from this flight to further diagnose the case.

Do you still remember what was showing on the screen of the RC? It is not recommended to fly the drone without a mobile device attached to the RC.

DJI Diana Posted at 2017-12-21 01:33
Do you still remember what was showing on the screen of the RC? It is not recommended to fly the drone without a mobile device attached to the RC.

Yes - all I saw was Connecting...

Simmo1 Posted at 2017-12-20 04:29
Are you serious???

Should have said restart DJI go and then use sport mode for fine control to return home and or land. So yes, I am serious. Are you?

First always set RTH to the app then what I have done in the past is reboot RC and even have reboot the app in the past and always worked for me.

Marty Markoe Posted at 2017-12-21 04:46
Should have said restart DJI go and then use sport mode for fine control to return home and or land. So yes, I am serious. Are you?

Please don't waste time and resources of this forum - "use sport mode for fine control"?
"Should have restart DJI" => again - didn't use the DJI app... so this comment is absolutely pointless!

Clearly shows You know nothing about sport mode or just trying to make fun of new drone owners...
NOT serious....

DJI Diana Posted at 2017-12-21 01:33
Do you still remember what was showing on the screen of the RC? It is not recommended to fly the drone without a mobile device attached to the RC.

Not that I would plan on flying without a mobile device connected, I didn't realize it wasn't recommended to fly without using a mobile device.

Thanks for that information!

Icarus77 Posted at 2017-12-21 01:47
Yes - all I saw was Connecting...

To ensure the safety, I would recommend flying the drone with the mobile device attached and checking the settings before take off. Personally, I always select RTH in the APP, then when the drone is disconnected and the RC shows connecting, the drone will trigger the RTH automatically. Besides, when it happens, you can also try to adjust the RC antennas and move the position of the RC, see if it can retrieve the signal.

CycleParadise Posted at 2017-12-21 14:48
Not that I would plan on flying without a mobile device connected, I didn't realize it wasn't recommended to fly without using a mobile device.

Thanks for that information!

You are welcome, hope you can enjoy the drone, fly safe!