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

Wifi repeater on steroids.....WL-WN570HA1

raulvolador

Well-known member
Joined
Jul 19, 2018
Messages
258
Likes
159
#22
@ph2t,

Have you already tried xiaomi wifi extender with external antennas ?

I am very interested knowing test results.

Don't forget share it with us.

Raul.
 
Joined
Dec 18, 2018
Messages
20
Likes
20
Location
Germany
#24
Ph2t's answer took me too long so I've opened my own mi repeater. Next step get some antennas from an old Wi-Fi router. I'll keep you updated 20181220_195304.jpg
 
Likes: ph2t

raulvolador

Well-known member
Joined
Jul 19, 2018
Messages
258
Likes
159
#25
I opened mine some days ago, soldered cables and attached external antenas. All assambled into a temporary cardboard box.

I'm now entering test phase. Maybe I will start a new thread for keep you informed.

Raul.
 
Likes: ph2t

ph2t

Well-known member
Joined
Sep 17, 2018
Messages
69
Likes
65
Location
Melbourne, Australia
#27
Great work guys! Sorry I haven’t updated this thread. Once I had this project completed and ready to test I had a motor die on the tello. It has taken ages to get a replacement motor but finally I have it and installed today successfully. I used a Racerstar 8520 8.5x20mm 53500RPM Coreless Motor.

I have read the other by Stele with great interest. Especially the comments regarding patch antennas, didn’t know that.

Now that the tello is up and running again I finally have a chance to test this mod and will update the thread within the next week.

Great work to everyone again!
Cheers,
ph2t.
 
Likes: Stele

raulvolador

Well-known member
Joined
Jul 19, 2018
Messages
258
Likes
159
#29
I have now mounted the MI repeater into a plastic housing and run some cables and mounts. Also the lil tello racer is working a while two days now without me killing (another) motor.
So tomorrow I will test this to see how it works.
View attachment 2646
Cheers,
ph2t.
Nice !!!

I am just working into a very similar enclosure for my xiaomi repeater.

This way is easier testing different antenna and even external wifi boosters

good work !
 

ph2t

Well-known member
Joined
Sep 17, 2018
Messages
69
Likes
65
Location
Melbourne, Australia
#30
OK, got some time outside with the modified repeater today. So far so good. I have bought a 2nd tello and used that in my tests.

Here is my setup:

repeater.jpg

First test: Stock tello with iPhone 8, Gamesir gamepad for control. I am the orange dot, the red area is the flight range I got. This is very rough! I took points from memory and made notes. Hand drawn and not exact! I was recording video for the whole flight and used the video feed drop out event as the definition of range limit reached.


area1.jpg

Second test: My 'lil racer tello (modified) with wifi repeater, iPhone 8 and gamesir gamepad for control. I am the orange dot, the wifi repeater is red dot, the blue area is the flight range I got. This is very rough! I took points from memory and made notes. Hand drawn and not exact! I was recording video for the whole flight and used the video feed drop out event as the definition of range limit reached.

area2.jpg

Some notes:
  • A very noisy wifi environment. The school building contain 50+ access points and all the private houses spew wifi onto the oval.
  • The 2nd test uses my 'lil racer tello which has a modified antenna, which would contribute to the results. A better test is to use modded repeater with the stock tello, I was lazy.
  • These sketches are sketchy - rule of thumb sorta results, not as exact a testing method as say Raul's work.
Fun.

cheers,
ph2t.
 

raulvolador

Well-known member
Joined
Jul 19, 2018
Messages
258
Likes
159
#31
Good test !

Only lack testing stock unmodified Xiaomi Wifi Extender too. That way you will check whether external antennas are an improvement or not :unsure:

That's the reason I bought a second Wifi Extender I will let unmodified. My plan is doing a face-to-face test, one against the other, same place, same conditions.

raul.
 

volate!lo

Well-known member
Joined
Dec 13, 2018
Messages
521
Likes
447
Location
Germany
#32
Good test !

Only lack testing stock unmodified Xiaomi Wifi Extender too. That way you will check whether external antennas are an improvement or not :unsure:

That's the reason I bought a second Wifi Extender I will let unmodified. My plan is doing a face-to-face test, one against the other, same place, same conditions.

raul.
Thats the way to go. Only one variable for each test.
 
Likes: Stele

raulvolador

Well-known member
Joined
Jul 19, 2018
Messages
258
Likes
159
#33
@ph2t,

I bought this plastic box for mounting antennas and Xiaomi repeater: https://www.amazon.com/Velleman-WCAH2851-Black-Plastic-160X95X55mm/dp/B000LQGC3M

As box is 160 cm long that's maximum possible distance between antenna mounts.

I read Xiaomi Repeater uses MIMO antenna array tecnology MIMO - Wikipedia

But I'm not sure what's the best distance between antenna mounts. As MIMO based on multiple paths and de-correlated signals It seem wider distance, best performance, but should it be multiplier/divider WIFI 2.4 Ghz wavelength (122.45 milimeters) ?

What distance did you use ?

Any other idea is wellcome.

raul
 
Last edited:

New Threads

Forum statistics

Threads
2,158
Messages
15,342
Members
5,202
Latest member
Nakanishi