RTH on P4A+ Failed
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2762 81 2018-6-26
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KedDK
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Suren Posted at 2018-6-26 19:34
Okay will try another test, with the combined 30 seconds and the time it takes the RC to power up again the total time cound should have been around just under a minute before I manually intiated RTH when I re-connected

When you take time the only thing you should watch is the connection led, when the green light go out the connection should be too, when it get green again the connection is re-established, it actually hold the connection for a long time on power down and connect again quite fast on power on.
When the App crashes there is plenty of time to power down/up the controller without getting a RTH initiated.

The only thing to suspect in regards to the controller and builtin app would be if the app fail to set the RTH setting in the aircraft but if i remember right, the default would be to RTH.
I would agree with Landbo that it must the aircraft firmware that fails if RTH does not work.
2018-6-27
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Suren
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Geebax Posted at 2018-6-26 21:23
I would not take it out so far. Try only about 60 Metres, shut off the RC and leave it for a couple of minutes. If it does not come home in that time, then there is something wrong. Even so, it seems very odd, I would suggest re-loading the current firmware in the aircraftr again, just in case there was a glitch last time. And if it still fails, then upload the flight log to PhantomHelp at: http://www.phantomhelp.com/LogViewer/Upload/

Follow the instructions on the site to upload the log, and when it shows the log, copy the URL and come back here and share it with us.

Thanks will try out again this weekend, busy resetting the RC now and will test either tomorow or this weekend to see if it works
2018-6-27
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Suren
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Eric13 Posted at 2018-6-26 23:49
I would also try with forward sensors on/off.
If they are on while flying out, the P4 will retrace it's original flight route upon signal loss rth.

Thanks never thought of that, will give that a go as well
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Suren
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KedDK Posted at 2018-6-27 01:16
When you take time the only thing you should watch is the connection led, when the green light go out the connection should be too, when it get green again the connection is re-established, it actually hold the connection for a long time on power down and connect again quite fast on power on.
When the App crashes there is plenty of time to power down/up the controller without getting a RTH initiated.

I checked and there is only 1 firmware listed for this P4, that is a very good point in regards to checking the LED, going to do that when testing it again. I just want the confidence in the drone that when i decide to fly out a couple of Km that it will return in the event of a disconnect.
2018-6-27
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Suren
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http://www.phantomhelp.com/LogViewer/MPMPK77TUTCR64V72X3T/
http://www.phantomhelp.com/LogViewer/WZ4RSTCCRBYHRIX3C8LV/

The flight logs of before RC disconnect and after it reconnected if anyone wants to view it.
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KedDK
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Suren Posted at 2018-6-27 08:52
I checked and there is only 1 firmware listed for this P4, that is a very good point in regards to checking the LED, going to do that when testing it again. I just want the confidence in the drone that when i decide to fly out a couple of Km that it will return in the event of a disconnect.

"I checked and there is only 1 firmware listed for this P4"
You just made me nervous there, please use P4A - hehe - was it the firmware for the controller or Aircraft you checked? - you could do a factory reset on the aircraft using Assistant2 and then a refresh of the firmware (do it without SD in aircraft). This should assure the aircraft is as it should be. All settings would need to be checked, remember the file counter in camera settings.

In regards to the controller, only one firmware is placed in the P4A download section and that is an old version 1.2.2 2017-09-30, could you list the various versions of RC, AC and App reported in the app? The release notes is one fatal mess of incorrect information.

"I just want the confidence in the drone that when i decide to fly out"
I can fully understand that, not that i would ever fly any longer than that i have full view of the craft and the direction it is pointing ...
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ALABAMA
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The home point was never recorded.
2018-6-27
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Mark The Droner
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ALABAMA Posted at 2018-6-27 12:10
The home point was never recorded.

If so, the distance from home would say 0.0 all the way down the log...
2018-6-27
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Eric13
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The strange thing : At the end of the first leg there is no message 'Connection lost'. I'll get those upon signal loss.

Alabama mentioned the HP was never recorded. I think it not always shows in the log but the drone will still record the HP upon take off. We had that discussion somewhere before...
You should hear upon take off: 'The Home Point has been updated'. Did you hear this?

Looking at the log in Google Earth it seems the HP is recognized (flag):

home point.jpg

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KedDK Posted at 2018-6-27 11:37
"I checked and there is only 1 firmware listed for this P4"
You just made me nervous there, please use P4A - hehe - was it the firmware for the controller or Aircraft you checked? - you could do a factory reset on the aircraft using Assistant2 and then a refresh of the firmware (do it without SD in aircraft). This should assure the aircraft is as it should be. All settings would need to be checked, remember the file counter in camera settings.

Checked firmware for AC, i like my distance flying
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Suren
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ALABAMA Posted at 2018-6-27 12:10
The home point was never recorded.

I noticed that on the log
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Suren
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Eric13 Posted at 2018-6-27 14:43
The strange thing : At the end of the first leg there is no message 'Connection lost'. I'll get those upon signal loss.

Alabama mentioned the HP was never recorded. I think it not always shows in the log but the drone will still record the HP upon take off. We had that discussion somewhere before...

STrange that it was not recorded but I did get the message
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Bashy
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You took off within 3 seconds of turning on the drone??? also there is no hopme point recorded in the CSV either

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2018-6-27
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Bashy
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Unless of course you started the drone 1st the the controller, should be controller 1st
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Labroides
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Suren Posted at 2018-6-27 19:33
STrange that it was not recorded but I did get the message

The home point was recorded.
It's there to see in your flight data as plain as you like.
It's "hidden" in colums Q & R labelled Home Latitude & Home Longitude.

You can confirm because the Phantom is displaying a distance from .... HOME.
With no home point, you get no distance from anywhere.
When you start up, before you have GPS and home point, the app shows N/A for distance.
When it shows a number, you know you have home.
If you have GPS, you have a home point.




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KedDK
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Eric13 Posted at 2018-6-27 14:43
The strange thing : At the end of the first leg there is no message 'Connection lost'. I'll get those upon signal loss.

Alabama mentioned the HP was never recorded. I think it not always shows in the log but the drone will still record the HP upon take off. We had that discussion somewhere before...

"At the end of the first leg there is no message 'Connection lost'. I'll get those upon signal loss"
Remember this a +RC, it would have ended logging and closed the app before it end the connection when the controller is powered off. For the same reason i mentioned to keep an eye on the led when taking time, it actually has connection for a while after it look like it has been shut down.
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KedDK
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Suren Posted at 2018-6-27 19:30
Checked firmware for AC, i like my distance flying

Would you mind posting the various versions, you said in one of the first posts here that your app has v.4.2.6 but i wonder if the controller is 1.3.6.0 or 1.4.1.0 or something else like you have not mentioned what version the Phantom has.

Edit: from the reply below, AC version would be called 1.0.128, 1.0.0.128 or something like that. App. 4.2.6 was on the pro+ release 1.4.1.0 but i beleive it was the same on 1.3.6.0.

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Suren
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Labroides Posted at 2018-6-27 21:19
The home point was recorded.
It's there to see in your flight data as plain as you like.
It's "hidden" in colums Q & R labelled Home Latitude & Home Longitude.

Thanks Great, I learn every day
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Suren
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KedDK Posted at 2018-6-27 22:23
Would you mind posting the various versions, you said in one of the first posts here that your app has v.4.2.6 but i wonder if the controller is 1.3.6.0 or 1.4.1.0 or something else like you have not mentioned what version the Phantom has.

Hi, will check the RC version when I get home, I know the P4 is on 0128 version, when connected to Assistant 2 that is the only firmware that is displayed for the drone
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Eric13
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Suren Posted at 2018-6-28 03:36
Hi, will check the RC version when I get home, I know the P4 is on 0128 version, when connected to Assistant 2 that is the only firmware that is displayed for the drone

Forget Assistant 2. I never understand why people fiddle around with that software.
It gives a lot of people firmware update problems.
That software is only good for two things: VPS calibration and hacking your drone (older versions only).
And yes - some ridiculous flight simulator also ;-)

The very last 'page' in the Go4 app is "About". You can see currently installed versions there and also update from there.
Only RC firmware you can't update this way (but through Assistant 2 neither):
That can only be done upon notification that comes from the app.
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Eric13 Posted at 2018-6-29 11:31
Forget Assistant 2. I never understand why people fiddle around with that software.
It gives a lot of people firmware update problems.
That software is only good for two things: VPS calibration and hacking your drone (older versions only).

Thanks will look at that for the firmware update, I have not yet had time to try those suggestions but will tommorow.
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Okay so after some testing the P4A+ today in regards to my post, i took the drone out abount 50 meters and set my RTH altitude to 20 meters and switched off the RC completely, the drone after a minute egaged the RTH feature and completed a sucessful return to home. Seems that it has to register a complete Disconnect for around a full minute before that engages.

So my question would be, is there a way to shorten this timer or not??

Seems that Eric and a few others were spot on about waiting longer for RTH to kick in on disconnect, Thanks Guys
2018-6-30
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Labroides
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Suren Posted at 2018-6-30 08:26
Okay so after some testing the P4A+ today in regards to my post, i took the drone out abount 50 meters and set my RTH altitude to 20 meters and switched off the RC completely, the drone after a minute egaged the RTH feature and completed a sucessful return to home. Seems that it has to register a complete Disconnect for around a full minute before that engages.

So my question would be, is there a way to shorten this timer or not??

OK ... that's what happens when you turn off the controller.
If you were wanting to properly simulate loss of signal, fly from close to a solid obstacle ... fly out and run behind the obstacle with the controller and put it down ... step back out and watch to see how long it takes the Phantom to RTH.
2018-6-30
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Mark The Droner
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Labroides Posted at 2018-6-30 14:43
OK ... that's what happens when you turn off the controller.
If you were wanting to properly simulate loss of signal, fly from close to a solid obstacle ... fly out and run behind the obstacle with the controller and put it down ... step back out and watch to see how long it takes the Phantom to RTH.

Haha... I tried that once with the FPV trying to mimic lost signal for FPV.  With my controller at the far end of the back of my property, I put the AC behind my house roughly 200 feet away and set it on the ground.  Still had signal.  Then I placed a cookie sheet leaned up against it so to the Phantom was like inside a metal tent.  Still had signal.  I put the AC in my house.   Still had signal.  I put the AC in my dirt cellar below the surface of the earth.  Still had signal.  WTF.  Exasperated, I put my AC in the clothes dryer and shut the dryer door.  I finally lost signal.  
2018-6-30
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Labroides
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Mark The Droner Posted at 2018-6-30 15:28
Haha... I tried that once with the FPV trying to mimic lost signal for FPV.  With my controller at the far end of the back of my property, I put the AC behind my house roughly 200 feet away and set it on the ground.  Still had signal.  Then I placed a cookie sheet leaned up against it so to the Phantom was like inside a metal tent.  Still had signal.  I put the AC in my house.   Still had signal.  I put the AC in my dirt cellar below the surface of the earth.  Still had signal.  WTF.  Exasperated, I put my AC in the clothes dryer and shut the dryer door.  I finally lost signal.

: )   
Maybe aluminium foil over the antennas would do it ?
2018-7-1
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Aardvark
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Mark The Droner Posted at 2018-6-30 15:28
Haha... I tried that once with the FPV trying to mimic lost signal for FPV.  With my controller at the far end of the back of my property, I put the AC behind my house roughly 200 feet away and set it on the ground.  Still had signal.  Then I placed a cookie sheet leaned up against it so to the Phantom was like inside a metal tent.  Still had signal.  I put the AC in my house.   Still had signal.  I put the AC in my dirt cellar below the surface of the earth.  Still had signal.  WTF.  Exasperated, I put my AC in the clothes dryer and shut the dryer door.  I finally lost signal.

"Exasperated, I put my AC in the clothes dryer and shut the dryer door.  I finally lost signal."

I hope the clothes dryer got home OK and that no kitchen implements were harmed or otherwise distressed during this experiment :-)
2018-7-1
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Aardvark
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Mark The Droner Posted at 2018-6-30 15:28
Haha... I tried that once with the FPV trying to mimic lost signal for FPV.  With my controller at the far end of the back of my property, I put the AC behind my house roughly 200 feet away and set it on the ground.  Still had signal.  Then I placed a cookie sheet leaned up against it so to the Phantom was like inside a metal tent.  Still had signal.  I put the AC in my house.   Still had signal.  I put the AC in my dirt cellar below the surface of the earth.  Still had signal.  WTF.  Exasperated, I put my AC in the clothes dryer and shut the dryer door.  I finally lost signal.

If it were properly connected to 'earth' the it should act like a Faraday shield, but there is one interesting note in Wikipedia on Faraday shields:-

A common misconception is that a Faraday cage provides full blockage or attenuation; this is not true. The reception or transmission of radio waves, a form of electromagnetic radiation, to or from an antenna within a Faraday cage is heavily attenuated or blocked by the cage, however, a Faraday cage has varied attenuation depending on wave form, frequency or distance from receiver/transmitter, and receiver/transmitter power. Near-field high-powered frequency transmissions like HF RFID are more likely to penetrate. Solid cages generally attenuate fields over a broader range of frequencies than mesh cages.
2018-7-1
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KedDK
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Mark The Droner Posted at 2018-6-30 15:28
Haha... I tried that once with the FPV trying to mimic lost signal for FPV.  With my controller at the far end of the back of my property, I put the AC behind my house roughly 200 feet away and set it on the ground.  Still had signal.  Then I placed a cookie sheet leaned up against it so to the Phantom was like inside a metal tent.  Still had signal.  I put the AC in my house.   Still had signal.  I put the AC in my dirt cellar below the surface of the earth.  Still had signal.  WTF.  Exasperated, I put my AC in the clothes dryer and shut the dryer door.  I finally lost signal.

Sorry i don't get this "mimic lost signal for FPV"?
Ain't it just to take off the goggles or hold something over the display and FPV is lost? If what was meant was FPV = RTH, then as Aardvark point out, hopefully it was with the setting put on Hover for signal loss as anything else had ended out fatal.
2018-7-1
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Mark The Droner
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It was a long time ago.  It was a P2V.  It was an experiment.  Losing FPV on those older ACs doesn't cause an RTH or even prompt for one.  I don't even remember why I was doing it.  
2018-7-1
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VetteGuyZ06
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I have used the RTH button several times....it works great.  Also flew 1.8 miles from RC when the drone disconnected.  Hovered for a few seconds, made a few slight turns, then headed back to home point without any problems ( I was scared to death as screen went totally black for a few seconds).  Hope you get this figured out.  I always make sure I get the home point msg and gps before flying.  
2018-7-1
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Eric13
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Mark The Droner Posted at 2018-6-30 15:28
Haha... I tried that once with the FPV trying to mimic lost signal for FPV.  With my controller at the far end of the back of my property, I put the AC behind my house roughly 200 feet away and set it on the ground.  Still had signal.  Then I placed a cookie sheet leaned up against it so to the Phantom was like inside a metal tent.  Still had signal.  I put the AC in my house.   Still had signal.  I put the AC in my dirt cellar below the surface of the earth.  Still had signal.  WTF.  Exasperated, I put my AC in the clothes dryer and shut the dryer door.  I finally lost signal.

"I put my AC in the clothes dryer and shut the dryer door.  I finally lost signal."

That's a great story!   
I was hoping it would have continued with one more sentence:
"Only when I turned the dryer on the signal got lost"  
2018-7-1
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Eric13
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Suren Posted at 2018-6-30 08:26
Okay so after some testing the P4A+ today in regards to my post, i took the drone out abount 50 meters and set my RTH altitude to 20 meters and switched off the RC completely, the drone after a minute egaged the RTH feature and completed a sucessful return to home. Seems that it has to register a complete Disconnect for around a full minute before that engages.

So my question would be, is there a way to shorten this timer or not??

"So my question would be, is there a way to shorten this timer or not??"

Probably only when you switch to the regular remote without the screen:
I tested it today: I switched off the RC and it took 10 seconds until the drone started the RTH flight.
Exactly what the manual says.

2018-7-1
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KedDK
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Suren Posted at 2018-6-30 08:26
Okay so after some testing the P4A+ today in regards to my post, i took the drone out abount 50 meters and set my RTH altitude to 20 meters and switched off the RC completely, the drone after a minute egaged the RTH feature and completed a sucessful return to home. Seems that it has to register a complete Disconnect for around a full minute before that engages.

So my question would be, is there a way to shorten this timer or not??

There is no settings to change the timing, unless going the dirty way perhaps.
It should take around 13 sec. in total from signal loss till aircraft begin going home, from the manual:

"Failsafe RTH will be automatically activated if the remote controller signal is lost for more than three seconds. The aircraft will plan its return route and retrace its original flight route home. The aircraft will hover for 10 seconds at its current location."

The only way to make it faster on the + would be as Labroides suggest, don't power down the controller but block the signal.
Did you check the timing from the led turned off till the aircraft faced home?
2018-7-1
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Suren
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Eric13 Posted at 2018-7-1 13:40
"So my question would be, is there a way to shorten this timer or not??"

Probably only when you switch to the regular remote without the screen:

Hi Eric, Thanks for that valuable piece of info and test results.
2018-7-2
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Suren
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KedDK Posted at 2018-7-1 23:20
There is no settings to change the timing, unless going the dirty way perhaps.
It should take around 13 sec. in total from signal loss till aircraft begin going home, from the manual:

I was looking at the light and started my counting from when the Led on P4 changed to some other colour and it was around 60 seconds or so
2018-7-2
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BobUnplugged
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You have three options for when you lose connection.  I think you have it set to HOVER.



2018-7-2
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KedDK
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BobUnplugged Posted at 2018-7-2 02:24
You have three options for when you lose connection.  I think you have it set to HOVER.

[view_image]

I think you did not read much of this thread.
2018-7-2
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BobUnplugged
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KedDK Posted at 2018-7-2 02:47
I think you did not read much of this thread.

I skimmed through it, but obviously missed something.  Sorry for trying to help.
2018-7-2
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Suren Posted at 2018-7-2 02:19
I was looking at the light and started my counting from when the Led on P4 changed to some other colour and it was around 60 seconds or so

Okay, thanks.
Still it would be the status led on the controller that tell when it has disconnected. Going from green to red if connection is lost and from green/red to black/powered off when controller get powered down.
Aircraft status leds would be fast flashing yellow when disconnection is discovered.
i am not sure if it does anything different from the slow or dual flashing green when flying with/without app running, also the manuals does not directly state if the pattern/color differ if flying in atti/sport versus p-gps/p-vps mode.
2018-7-2
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BobUnplugged Posted at 2018-7-2 02:54
I skimmed through it, but obviously missed something.  Sorry for trying to help.

No problem, it was just that this has been mentioned a few times on the way already and have been dismissed.
2018-7-2
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