Setting Dead zones on TelloFpv for iOS

[volate!lo]

Personally I'd prefer 3MB bitrate for stable video feed and iframe at 7s. Iframe is only there to force a re-init of the video stream in case some stream breakup goes unnoticed.
With a perfectly stable video feed it acutally should not be required at all - but then nothing is perfect.


Make sure you turn the phone into flight mode, and reenable only wifi if you have a wired controller.

With BT controller you have to enable BT as well, but even then flight mode is beneficial. It turns off a few background tasks that disrupt the video feed and introduce little stutter.
Using BT controller its almost essential to use a wifi extender as well. Not to extend the range but to reduce the BT noise and jitter in the video feed that you noticed.

Some wired PS3 controller is probably the best & cheapest setup. I can fly though the adjactent rooms without any video hickups at all. That is in a house with brick walls. Also oudoor no problem and we have a fairly large backyard.

Video delay on a decent phone should be 120ms. Far from DJIs 40ms, but still fairly good.

Control delay in sport mode is under ~30ms, in video mode the input is filtered by the drone so it reacts very slow

 

[christiaan]

Personally I'd prefer 3MB bitrate for stable video feed and iframe at 7s. Iframe is only there to force a re-init of the video stream in case some stream breakup goes unnoticed.
With a perfectly stable video feed it acutally should not be required at all - but then nothing is perfect.


Make sure you turn the phone into flight mode, and reenable only wifi if you have a wired controller.

With BT controller you have to enable BT as well, but even then flight mode is beneficial. It turns off a few background tasks that disrupt the video feed and introduce little stutter.
Using BT controller its almost essential to use a wifi extender as well. Not to extend the range but to reduce the BT noise and jitter in the video feed that you noticed.

Some wired PS3 controller is probably the best & cheapest setup. I can fly though the adjactent rooms without any video hickups at all. That is in a house with brick walls. Also oudoor no problem and we have a fairly large backyard.

Video delay on a decent phone should be 120ms. Far from DJIs 40ms, but still fairly good.

Control delay in sport mode is under ~30ms, in video mode the input is filtered by the drone so it reacts very slow

Next time, when I fly the Tello, will try your recommended settings. To be honest, I fly with this max bitrate / min iframe for like 2 years and work very good. In a wifi free enviroment I have no problem with the feed whatsoever. The others, like you wrote.

 

[Chrislaf]

Personally I'd prefer 3MB bitrate for stable video feed and iframe at 7s. Iframe is only there to force a re-init of the video stream in case some stream breakup goes unnoticed.
With a perfectly stable video feed it acutally should not be required at all - but then nothing is perfect.


Make sure you turn the phone into flight mode, and reenable only wifi if you have a wired controller.

With BT controller you have to enable BT as well, but even then flight mode is beneficial. It turns off a few background tasks that disrupt the video feed and introduce little stutter.
Using BT controller its almost essential to use a wifi extender as well. Not to extend the range but to reduce the BT noise and jitter in the video feed that you noticed.

Some wired PS3 controller is probably the best & cheapest setup. I can fly though the adjactent rooms without any video hickups at all. That is in a house with brick walls. Also oudoor no problem and we have a fairly large backyard.

Video delay on a decent phone should be 120ms. Far from DJIs 40ms, but still fairly good.

Control delay in sport mode is under ~30ms, in video mode the input is filtered by the drone so it reacts very slow

Thanks for the tips and recommendations. I will try them out. Some of my problems could also be my old phone - an iPhone XR.

Chris

 

[christiaan]

@volate!lo As soon as I got home, I made a test. I was very curious what's the difference between our settings, since you're more profi, than I.
t home (lots of wifi everywhere) I just don't see any difference. I tried it with 2 Tellos, but same result. I used my daily driver smartphone, which is a Xiaomi Poco X3 NFC (8 cores, 6g RAM). I'll sure do another outdoors with the drone phone, a LG G6 (4 cores, 4g RAM)

Tried with 2 different devices too: a Xiaomi R1CN dual router (connects 2,4g to the drone and 5g to the phone) and a regular Xiaomi repeater 2.

 

[volate!lo]

@volate!lo As soon as I got home, I made a test. I was very curious what's the difference between our settings, since you're more profi, than I.
t home (lots of wifi everywhere) I just don't see any difference. I tried it with 2 Tellos, but same result. I used my daily driver smartphone, which is a Xiaomi Poco X3 NFC (8 cores, 6g RAM). I'll sure do another outdoors with the drone phone, a LG G6 (4 cores, 4g RAM)

Tried with 2 different devices too: a Xiaomi R1CN dual router (connects 2,4g to the drone and 5g to the phone) and a regular Xiaomi repeater 2.

For the bitrate that is only noticeable in a distance when the wifi gets weaker. Lower bitrates give a bit more stability and faster stream recovery, but at the cost of sharpness.
When using a wifi repreater in close range this doesn't do much, so just leave it at 4MB for close range.
For extreme long range I'd go for 1MB.

For the iframe intervall that should be noticeable right away. Each IFrame gives a slight stutter and blurring, the video feed starts to sharpen over the next few video frames. If you set it to minimum IFrame intervall (I think that is 300ms) this blurring will occur 3x per second and the video will remain blurry. I can easily identify every single iframe in a Tello video.
The 300ms is again intended only for extreme long range flight, where video feed breaks up frequently.

Personally I don't do exterme long range as I am too lazy for the inevitable SAR missions.

 

[christiaan]

For the bitrate that is only noticeable in a distance when the wifi gets weaker. Lower bitrates give a bit more stability and faster stream recovery, but at the cost of sharpness.
When using a wifi repreater in close range this doesn't do much, so just leave it at 4MB for close range.
For extreme long range I'd go for 1MB.

For the iframe intervall that should be noticeable right away. Each IFrame gives a slight stutter and blurring, the video feed starts to sharpen over the next few video frames. If you set it to minimum IFrame intervall (I think that is 300ms) this blurring will occur 3x per second and the video will remain blurry. I can easily identify every single iframe in a Tello video.
The 300ms is again intended only for extreme long range flight, where video feed breaks up frequently.

Personally I don't do exterme long range as I am too lazy for the inevitable SAR missions.

Thank you very much. Very useful info. Now I Know how to set it up for different ranges and enviroment.

For the signal strenght I turned into a little fanatic lately. I first used the Xiaomi repeater, like others. Later I wanted to replace it with another, because the hinge became a little loose. At one point I realised, that it's possible to use both in the same time, the Tello connects to both, like a mesh networks, since they have the same wifi name. Later I bought a Xiaomi r1cn router, this is actually what I use indoors in wall penetration mode. But it wasn't enough, bought the little brother too, a Xiaomi r1cl, because it can be powered with power bank. For easy setup, they all have "Tello_plus" name, so can actually use all of them together... So, I have very strong signal source outdoors. I fly max 300 - 400m. It not too much, comparing the YouTube recorders, but I have signal every direction and it covers kinda large area. Also realized one more thing: it's not only the distance, that determines signal quality, also the surrounding metal objects (cars, fences, road signs etc.)

 

[volate!lo]

During my testing years ago I had the best results with the r1cl in wall penetration mode, but I only tested a handfull of repeaters. Don't know if wall penetration mode is legal outside of china but works well.

I did some 500+m flights and a few SAR missions in the beginning but nowadays I am no longer interested. I stay within our backyard and sometimes the field behind it if it was mowed recently. If I really want to do long distance I use a Mavic Mini, or now the Neo.

 

[christiaan]

During my testing years ago I had the best results with the r1cl in wall penetration mode, but I only tested a handfull of repeaters. Don't know if wall penetration mode is legal outside of china but works well.

I did some 500+m flights and a few SAR missions in the beginning but nowadays I am no longer interested. I stay within our backyard and sometimes the field behind it if it was mowed recently. If I really want to do long distance I use a Mavic Mini, or now the Neo.

The r1cl was very hard to find. I'm a long time ebayer, got it from South Korea, the r1cn is from willhaben, Austria. I tried a couple of tp link routers with limited success (100 - 150m, slow connection) and a no name chinese one, had poor quality.
400m approx when the signal gets weak and I never wanted to push it any further, since I'm not a ranger tester.

Also the same with the mini. I had a fcc hacked Spark and a Mini 1 too for long range. I live in south Austria, not far away from a river, with no ships and no tourists. The flying is allowed, no villages near and no wifi. The mini flew over 2,5 km, the spark 1,5 with a parabola on the antennas. The tello is to fly around when limited airspace is available.

And now comes the neo... Unfortunately the small battery doesn't allow long flights. I check it out Wednesday, i get a day off.

 

[gapi]

Hello, My 1st post. Reading about the creeping or dead zones I am a rookie but had an experience with my new Tello with GameSir T1d controller.
On start up first flight the pitch forward had to be held almost full lock forward for it to hover. I hit the Webb seeing lots of app suggestions and then one who reported calibrating the sticks with the controller off.
One at a time push the stick all the way forward 3 times, rearward 3, right 3, left 3. I did this and on the restart she hovered steady as a rock and operates great. No latency.
Maybe it will help.
I received a Refurbished Tello Boost from DJI today. Seen here with a Oneplus 7T I brought out of retirement.

 

[gapi]

I missed the point sorry.