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Remote controller connection error - DJI Go 4

Cosmos 5

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Hi All,
Like others I am suffering from an intermittent failure of the DJI Go 4 mid flight, where it reports Remote controller connection error .. the screen freezes and goes B&W. Only a phone reboot re-establishes the app.

I'd be interested in any insights others have to remedy the problem.
By way of background:
  1. I am using HUAWEI Mate 9 running Android 9 with all updates applied. All Apps are closed and the phone powered off then powered on before starting to run DJI Go 4. There is 27GB of spare space on the phone. Note I get the same error on my Samsung Note Fan Edition.
  2. I am using the version of DJI Go 4 that is current and was downloaded on the 11th March, it is Version 4.3.32
  3. I have tried three different DJI USB/USBC leads between the RC and the phone. The last of those leads being from the large USB port underneath the controller. The error has occurred with all of these USB leads.
  4. All firmware updates for the drone, controller and batteries have been made. The versions are:
App: 4.3.32
Aircraft: 01.00.0510
Remote Controller: 01.00.0510

It appears to be a software error to me, in that the error can occur when the RC is lying stationary on a surface. Given I have tried the large USB port on the RC and multiple USB leads, I am at a lost as to what to do next. In all other aspects a fantastic drone.


Any advice appreciated.
Eric
 

ff22

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Hi All,
Like others I am suffering from an intermittent failure of the DJI Go 4 mid flight, where it reports Remote controller connection error .. the screen freezes and goes B&W. Only a phone reboot re-establishes the app.

I'd be interested in any insights others have to remedy the problem.
By way of background:
  1. I am using HUAWEI Mate 9 running Android 9 with all updates applied. All Apps are closed and the phone powered off then powered on before starting to run DJI Go 4. There is 27GB of spare space on the phone. Note I get the same error on my Samsung Note Fan Edition.
  2. I am using the version of DJI Go 4 that is current and was downloaded on the 11th March, it is Version 4.3.32
  3. I have tried three different DJI USB/USBC leads between the RC and the phone. The last of those leads being from the large USB port underneath the controller. The error has occurred with all of these USB leads.
  4. All firmware updates for the drone, controller and batteries have been made. The versions are:
App: 4.3.32
Aircraft: 01.00.0510
Remote Controller: 01.00.0510

It appears to be a software error to me, in that the error can occur when the RC is lying stationary on a surface. Given I have tried the large USB port on the RC and multiple USB leads, I am at a lost as to what to do next. In all other aspects a fantastic drone.


Any advice appreciated.
Eric
Most reports I've seen about the drop-out have generally been associated with the Smart Controller but you are using the STANDARD and a phone.
 

DanMan32

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App crashes on phones and tablets aren't uncommon. It will occur more often if you have a bad cable or cable connection. You've tried a few cables, but how old are they all? Over time they can wear out if flexed a lot or possibly if used for charging with high currents.
Check that your phone's USB port isn't dirty which can make a poor connection. Same for the RC ports though the bottom port is less prone to wear and dirt.

It shouldn't be necessary to restart your phone to recover from an app crash. For me it tends to restart on its own. If it's stuck but still running, you can close it from the app manager and restart it.

If your device has a slow CPU, GPU or low in RAM, that can cause crashes. I have a Samsung Galaxy Tab E that was nothing but trouble for any DJI app, even my Robomaster. Having only 1.5GB of RAM was probably a major contributor to the issues.
 

Cosmos 5

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Thanks for your thoughts on this. Scenario is:
- All cables are effectively new (totally new for 2 of them)
- Phone and RC ports are clean and have been managed carefully
- Interesting that DJI Go 4 auto restarts for you.. for me never.. a reboot of phone is required.
- Plenty of processor speed and RAM with this phone... and a limited suite of loaded apps

App crashes on phones and tablets aren't uncommon. It will occur more often if you have a bad cable or cable connection. You've tried a few cables, but how old are they all? Over time they can wear out if flexed a lot or possibly if used for charging with high currents.
Check that your phone's USB port isn't dirty which can make a poor connection. Same for the RC ports though the bottom port is less prone to wear and dirt.

It shouldn't be necessary to restart your phone to recover from an app crash. For me it tends to restart on its own. If it's stuck but still running, you can close it from the app manager and restart it.

If your device has a slow CPU, GPU or low in RAM, that can cause crashes. I have a Samsung Galaxy Tab E that was nothing but trouble for any DJI app, even my Robomaster. Having only 1.5GB of RAM was probably a major contributor to the issues.
 

jmorse62

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I have the same problem, I use a Crystal Sky monitor. Since I have mine set to return to home if signal is lost it landed safely. I have tried several new cables and still the same problem. I assume it is bad port on the controller or the monitor. Is there any way to test these ports, probably not. It would be nice to see if it is a controller port or a monitor port. My remote is about 4 years old and the monitor only about a year.
 

jmorse62

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Kind of an interesting video from when it happened, I was carrying a birthday banner for neighborhood party and it was a little scary with the drone carrying the sign while I had no control.

 

Cosmos 5

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Mine is currently being tested by DJI.. as the problem is intermittent it will not be straight forward... I agree it is very disconcerting when it happens... (otherwise the tech is fantastic).. at a guess the problem for me is originating in: DJI Go 4 app, or the RC controller is not working occasionally .... we can't have failures like this especially when on missions like b-day parties.
 

jmorse62

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Did you get any reply from DJI about your remote controller issue?
 

Cosmos 5

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DJI have been good to deal with in on this matter. Worked though all possible diagnostics... sent them log files and a video of it happening. Ultimately they asked my to send the entire set drone/controller in to them.
They have tested it and found the main board on the RC is faulty. it is in the processes of being tested after the repair. So presuming that this is the issue, the RC left the factory in this state.. with the outcome being that the random failures drove me nuts over a couple of months.... so I guess in your case be alert to the fact that it may be an RC issue. Hope you get a suitable;e solution.
 
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naiku

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I'll keep an eye on this thread, my connection dropped yesterday, short panic, deep breath, the drone is doing what it should and RTH.

It actually reconnected without having to reboot my phone or restart the app. I have my suspicion that it was pilot error and the USB was not firmly seated in my phone. I have a Note 10+ and it seems to be right on the limit for what the controller is able to hold.
 

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