Devo7 Range (with Walkera Rodeo 150)

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18 Dec 2016 20:55 #56958 by problemchild
Devo7 Range (with Walkera Rodeo 150) was created by problemchild
Hi :)

Recently bought a Walkera Rodeo 150 which comes ready to fly with a Devo7

I practiced on the drive and got to grips

I then took it out to the field and after 20m the Rodeo climbed uncontrollably until it was at 200ft with zero response from the Devo7 inputs

I then switched off the Tx and the Rodeo fell to earth

So the reason for this seems to be a range problem. I have carried out a range test and its sub 20m.



you can hear the Rodeo beeping as it loses connection

I have replaced the Rx board on the Rodeo but still the same issue

It can only be linked to the Tx

I have checked the antenna connection and that seems ok

Tx antenna is at 90degs

Please help

This was the result of a rather large freefall...





JJ

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19 Dec 2016 13:05 #56981 by Deal57
Replied by Deal57 on topic Devo7 Range (with Walkera Rodeo 150)
I don't know exactly what help you are looking for. I am sorry to hear when a good aircraft fails, and I know how frustrating it feels. That being said, simply put, it is critical to conduct a range test for the intended location and equipment before flying.

The Devo 7 is not capable of using the Deviation software, so I expect you may not get many responses on this board. But I think we all can sympathize. With any transmitter, while it is unusual to get such short range, it is pretty common. It could of course be a problem with the transmitter, but there are many environmental issues that could also affect your signal, and competing wifi or other 2.4ghz interference is common. Additonally, your equipment must be properly asembled and functional. For example, your transmitter and aircraft battery should be fully charged and the antennae should be properly attached and oriented for the conditions.

It's too late to prevent your accident and again I sympathize. I hope you can get flying again soon.

Deviation Devo7e 3way switch mod, A7105, NRF24L01
Devo6s 2x2 switch mod, trim mod, haptic, multimodule, A7105, NRF24L01, CC2500
Devo12e 4-in-1 with voice mod -- it speaks!!

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19 Dec 2016 16:26 #56989 by aMax
Replied by aMax on topic Devo7 Range (with Walkera Rodeo 150)
Does anyone know if the DEVO-RX716 Receiver has diversity? Otherwise this antenna setup does not make sense.

Devo7e, TaranisQ X7, R9M , 4in1 MM, Futaba FC18plusV3.2 & DFT/FLD-02

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19 Dec 2016 16:35 #56990 by vlad_vy
Replied by vlad_vy on topic Devo7 Range (with Walkera Rodeo 150)
It looks like it has RF switch (between antennas), so it is some type of diversity.

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19 Dec 2016 16:38 #56991 by FDR
Replied by FDR on topic Devo7 Range (with Walkera Rodeo 150)
Walkera receivers usually do have true diversity: they have two independent CYRF chip for the two antennas.
It was that way even in the old Walkera receivers like the RX-2801 Pro...

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19 Dec 2016 16:44 - 19 Dec 2016 16:45 #56992 by vlad_vy
Replied by vlad_vy on topic Devo7 Range (with Walkera Rodeo 150)
Last edit: 19 Dec 2016 16:45 by vlad_vy.

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19 Dec 2016 19:08 #57004 by FDR
Replied by FDR on topic Devo7 Range (with Walkera Rodeo 150)
So this one has not... :lol:

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19 Dec 2016 19:57 #57009 by problemchild
Replied by problemchild on topic Devo7 Range (with Walkera Rodeo 150)
thanks for the info so far - sorry if i'm on the wrong forum (oops)

thats the Rx board I have and have tried 2

the aerials sit on the Rodeo at 90deg to each other with exposed ends



I have no issues with my other 2.4ghz systems on my 4 tamiya RC cars in this area but its v hard to test range normally with a Tx as they are normally in excess of 100m easy.

JJ

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19 Dec 2016 20:19 - 19 Dec 2016 20:20 #57013 by aMax
Replied by aMax on topic Devo7 Range (with Walkera Rodeo 150)
Keep them up as straight as possible, possibly a bit tilt back.
And how did you set the antenna on the transmitter? Did you check inside if the wire still good connected to the module?

Devo7e, TaranisQ X7, R9M , 4in1 MM, Futaba FC18plusV3.2 & DFT/FLD-02
Last edit: 19 Dec 2016 20:20 by aMax.

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19 Dec 2016 20:40 #57016 by problemchild
Replied by problemchild on topic Devo7 Range (with Walkera Rodeo 150)
walkera state the antenna to be at the angle shown

opened up the devo7 and tested not only the antenna connection but also the board was seated properly

JJ

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