Bug founded at Litchi for Mavic Mini (SOLVED)

raulmavic · Aug 18, 2020

Hi

Today I suffered an annoying lost of control when flying Litchi Beta for Mavic Mini v4.18.0 build 3623.

Mini got stuck into JOYSTICK mode, it stays hovering, no respondig to any stick input...

After some panic seconds i tried entering menus. I entered FOLLOW menu, start follow and just stop follow. Luckily I got Joystick mode switched to GPS mode, regaining stick control of drone.

By the way, RTH worked while in JOYSTICK mode, but as soon I cancel RTH, manual control didnt worked.

R.

raulmavic · Aug 18, 2020

I'll post a video as soon as possible. (Edited for adding video)

By the way, bug happend when I loose signal in the middle of a Photo-Pano maneouver and RTH was triggered.

As you know PANORAMA uses JOYSTICK drone control. Maybe that's the cause of the bug.

Are there any way to comunicate issue to Litchi programers ?

R.

Bussty · Aug 18, 2020

I'm thinking there is something up in the SDK as exactly the same thing has happened in Dronelink. You can email them here [email protected]

maelstrom · Aug 18, 2020

Bussty said:
I'm thinking there is something up in the SDK as exactly the same thing has happened in Dronelink. You can email them here [email protected]

Have you reported this to Dronelink? What were you doing when this happened? How did you resolve it?

Bussty · Aug 18, 2020

maelstrom said:
Have you reported this to Dronelink? What were you doing when this happened? How did you resolve it?

Oh yes I have reported at some length in DL forums as have others. Just running a 360 pano mission infact just doing anything drone can totally lock up, especially bad if you switch between apps after takeoff which I don't now do but still getting errors. We think something to do with wifi interference that is a micro cut in signal but blows out the plan in DL case it's probably happening in DJI Fly too but it just picks up and carries on where as in DL at least it "breaks" the plan. First time it happened I was within 20M of Home Point and had no control what so ever. Even hitting the RTH/Cancel button once gave me no control so was reluctant to engage RTH as if I couldn't take control drone would have just landed where it was and crash on the roof. So I...turned off the controller!! Luckily that worked and it came back up fast enough the RTH sequence (i.e just land cos I was less than 20M away) had only just started so I could take control but it was quietly terrifying. I don't know if I had just long pressed RTH whether I would have had control or not so took the punt on the restart. Subsequent testing however where I again encountered the total lock up (but this time I was over grass) did allow me to take control when long pressed RTH even though short press did nothing. Morale of story if flying less than 20M away have nothing under you that isn't good to land on!

maelstrom · Aug 18, 2020

Bussty said:
Oh yes I have reported at some length in DL forums as have others.

Found the Dronelink forum post. Wasn't it caused by having both Dronelink and the Fly app open together?

Bussty · Aug 18, 2020

Sure...

1. Test flight a disaster

Just flew my first mission that nearly ended in disaster. The mission can be viewed here: https://app.dronelink.com/martin-kraushaar/test-1/plan/FyLAtHnDDej0Klf9frSR/Cb0lCuGItUpTQJVvDKPd I started ...

support.dronelink.com

That was scary! What did I do wrong?...

I modified a 360 pano plan to basically fly up then over my house then take the pano then move back over our lawn and finish. Not land Because I'm within 20m of the drone I don't have RTH enabled ...

support.dronelink.com

Mavic Mini disconnected

Dear Support, I've just bought Dronelink software today... I wanted to try it with my Mavic Mini on my Huawei Mate 20 Pro (Android 10, EMUI10.1) and it doesn't connect to the device, the app shows ...

support.dronelink.com

maelstrom · Aug 18, 2020

Bussty said:
Sure...

1. Test flight a disaster

Just flew my first mission that nearly ended in disaster. The mission can be viewed here: https://app.dronelink.com/martin-kraushaar/test-1/plan/FyLAtHnDDej0Klf9frSR/Cb0lCuGItUpTQJVvDKPd I started ...

support.dronelink.com

That was scary! What did I do wrong?...

I modified a 360 pano plan to basically fly up then over my house then take the pano then move back over our lawn and finish. Not land Because I'm within 20m of the drone I don't have RTH enabled ...

support.dronelink.com

Mavic Mini disconnected

Dear Support, I've just bought Dronelink software today... I wanted to try it with my Mavic Mini on my Huawei Mate 20 Pro (Android 10, EMUI10.1) and it doesn't connect to the device, the app shows ...

support.dronelink.com

I think I must have edited my post as you posted the links! I was looking in Bug Reports rather than the General Discussion forum. As I said in my edited post, wasn't the problem caused by having Dronelink and the Fly app open together?

Bussty · Aug 18, 2020

I think that is part of the problem without including it in a plan you have to set RTH height. max heights etc and RTH behaviour in DJI Fly then shut down (without taking off) then use the DL app. I'm not sure that is the issue as I have known those values are in the drone from last use and just flown straight from DL and still had issues. I think it's all about wifi interference as in this post...

Voting for feature to allow Mavic Mini to take automated HDR images and panos

Hello all. I'm sure many of you would welcome the ability for the Mini to be able to do HDR images or panos using a Dronelink Plan. Apparently there are many other requests ahead of this feature an...

support.dronelink.com

... a community member ran a plan I had written for HDR 360 in a different location and worked fine. That's part of the issue too it won't consistently work fine sometimes it will sometimes it won't. I think the Mini is more susceptible as a wifi drone and not occusync.

maelstrom · Aug 18, 2020

Thanks for the information.

raulmavic · Aug 19, 2020

I just emailed litchi support, reporting bug and pointing this thread.

R.

raulmavic · Aug 19, 2020

Litchi support answered me:

Litchi Support (VC Technology Ltd)

19 Aug 2020, 11:53 BST

Hi,

To exit Joystick mode, switch from P-mode to S or C-mode using the button in the top bar.
Normally it should not be stuck in this mode, which flight mode were you using prior to it being stuck in joystick mode?
Kind Regards,
Litchi
Online help at Help - Litchi

djborsi · Aug 19, 2020

raulmavic said:
Litchi support answered me:

Litchi Support (VC Technology Ltd)

19 Aug 2020, 11:53 BST

Hi,

To exit Joystick mode, switch from P-mode to S or C-mode using the button in the top bar.
Normally it should not be stuck in this mode, which flight mode were you using prior to it being stuck in joystick mode?
Kind Regards,
Litchi
Online help at Help - Litchi

Hi raulmavic,

Litchi is not writing nothing new, I could already read it on their website, see below:

Regaining Control
Whenever the drone flies autonomously, you can regain control instantly at any time using the remote controller's flight mode switch.
For newer drone models (Mavic, Phantom 4, Spark, Inspire 2), toggle the flight mode switch from "P" to "S"(sport) mode in order to regain control. You may switch back to "P" mode afterwards.
For older drone models (Phantom 3, Inspire 1), toggle the flight mode switch from "F" to "P" mode in order to regain control. You may switch back to "F" mode afterwards.
When connected to the drone without remote controller (for example with Spark or Mavic Air/Pro), you can use the red stop button in the left button bar to stop an autonomous flight and regain control.

Source: Help - Litchi

I am a beginner with MM and especially with Lichi, this is why I have read their guide in details ?

raulmavic · Aug 19, 2020

djborsi said:
Hi raulmavic,

Litchi is not writing nothing new, I could already read it on their website, see below:

Regaining Control
Whenever the drone flies autonomously, you can regain control instantly at any time using the remote controller's flight mode switch.
For newer drone models (Mavic, Phantom 4, Spark, Inspire 2), toggle the flight mode switch from "P" to "S"(sport) mode in order to regain control. You may switch back to "P" mode afterwards.
For older drone models (Phantom 3, Inspire 1), toggle the flight mode switch from "F" to "P" mode in order to regain control. You may switch back to "F" mode afterwards.
When connected to the drone without remote controller (for example with Spark or Mavic Air/Pro), you can use the red stop button in the left button bar to stop an autonomous flight and regain control.

Source: Help - Litchi

I am a beginner with MM and especially with Lichi, this is why I have read their guide in details ?