Hello Tello Pilot!
Join our DJI Tello community & remove this banner.
Sign up

WIFI reflector for improving Tello range using Xiaomi WIFI repeater

raulvolador

Well-known member
Joined
Jul 19, 2018
Messages
461
Reaction score
386
Location
Spain
I read people using home-made wifi reflector for improving Internet WIFI coverage into their home routers:

You can use aluminum foil to strengthen your Wi-Fi signal

Trying to improve Tello's signal an range I built my own Windsurfer WIFI receiver using aluminium foil, glue and cardboard. I followed this web tutorial:

How to build your own Windsurfer Antenna

See results:

windsurfer wifi relfector.jpgwifi reflector xiami repeater hole.jpgwifi reflector xiaomi repeater assambly.jpgtello wifi reflector.jpgtello wifi reflector xiaomi ready.jpg

I tested my WIFI reflector attached into Xiaomi WIFI repeater. I was very excited but test results have not been very good.

I flew the same route twice, with and without WIFI reflector. Both fligths into an urban, crowdy WIFI environmentet.

I noticed an slightly improved signal strenght, a little better image quality and more signal bars, but range is quite similar.

In my first flight Tello was oriented forward. I could flew 140 meters away without reflector and 170 meters with reflector. That's a 20% range improvement.

In my second flight attemp Tello was oriented backwards (towards me). I could flew 200 meters away without reflector and 210 meters with reflector. That's a barely 5% range improvement.

EDITED: in other flights I have achieved improvements of up to 33%

Take into account you must flight right in front reflector. WIFI coverage is worse on the sides and null in the back.

In conclusion, for me not always worth it worth using a wifi reflector, but why don't test by yourself ?
 
Last edited:

raulvolador

Well-known member
Joined
Jul 19, 2018
Messages
461
Reaction score
386
Location
Spain
Hi,

Yesterday I decided to gave my homemade WindSurfer antenna reflector another try.

I flew into an urban environment, high wifi interference. Xiaomi wifi extender with attached WindSurfer reflector placed at the roof terrace abour 10 meters hight and pointing in the direction of the Tello's flight. App used is aTelloPilot. Tello pointing in the direction of the flight, away from me.

My results:

Flying without windsurfer reflector I got a 133 meters range

tello with xiamomi.jpg

Fying using windsurfer reflector I got a 177 meters range

tello with xiamomi plus windsurfer reflector antenna.jpg

That is a 33% range improvement. I also noticed an stronger video signal. I got an extra bar into aTelloPilot four-segments Wifi strenght indicator for entire flight. Also a more stable image and less frame lost. In general, a feeling of more flying security.

But it is necessary to fly in the direction in which the reflector points, so the refector is only useful if you know perfectly where you want to go. You can see in this attached graphics how signal is amplified only in one direction:

Parabolic-Reflector-Antenna-working.jpg
6inch_plot_vert.jpg

Wifi reflecor is also bulky and fragile so it is only useful when you fly from home or you are looking to beat a distance record ;)

You should try it to draw your own conclusions.

Raul.
 

New Threads

Members online

Forum statistics

Threads
2,637
Messages
20,556
Members
6,273
Latest member
Kospa