V977 for adventurous!

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08 May 2014 08:32 #22994 by victzh
V977 for adventurous! was created by victzh
WARNING! Highly experimental, tie your heli down before trying!

Here are 2 builds for Devo10 and Devo7E with KN (V977) protocol added. Protocol has 8 channels - 4 regular - Throttle, Aileron, Elevator, and Rudder, and 4 binary, which turn on/off V977 features: Dual Rate, Throttle Hold, Idle Up (I suppose), and 3G gyro. Zero values are - Normal rate, Throttle active, Normal mode, 6G gyro mode.

I did this by published document and partial SPI trace, I don't have a heli to check yet. I uploaded it to my Devo10 and tried that it does not hang, that's it.

Please, tie your heli down if you try this, I am not responsible for damage!

Please, report your results - did not bind, did not fly, whatever.
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08 May 2014 09:40 #23003 by dc59
Replied by dc59 on topic V977 for adventurous!
Hi Victzh,

I want to try it,but I am using Devo8 .... :(

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08 May 2014 13:59 #23010 by victzh
Replied by victzh on topic V977 for adventurous!
I will build it for you.

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08 May 2014 14:38 #23012 by victzh
Replied by victzh on topic V977 for adventurous!
Here you go but seriously, tie it down! When I first try a new protocol on small quadcopters they usually end up in a weird place, sometimes ruining something on the way.
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08 May 2014 20:12 #23029 by Daryoon
Replied by Daryoon on topic V977 for adventurous!
Very cool. Thanks.

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08 May 2014 22:10 #23041 by Daryoon
Replied by Daryoon on topic V977 for adventurous!
This protocol CYRF6936 based?

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08 May 2014 22:12 #23042 by victzh
Replied by victzh on topic V977 for adventurous!
nRF24L01+ (Original uses Beken BK2423, as usual).

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08 May 2014 22:19 #23044 by Daryoon
Replied by Daryoon on topic V977 for adventurous!
Ah, ok. I got confused from your post on the Alias thread.

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09 May 2014 00:28 #23045 by dat
Replied by dat on topic V977 for adventurous!
great!may i use 8s ver in my 12s ?

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09 May 2014 00:38 #23046 by victzh
Replied by victzh on topic V977 for adventurous!
I better build Devo12 for you ;-)

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09 May 2014 00:45 #23048 by dat
Replied by dat on topic V977 for adventurous!
thanks a lots , victzh thank you! :lol:

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09 May 2014 04:25 #23050 by victzh
Replied by victzh on topic V977 for adventurous!
This is Devo12 build. I had one positive report on binding it with V977, but in a peculiar manner - when you open the page for binding, you switch protocol first to HM830, then back to KN and only then bind. Then it binds and basically works.

I have my heli departed from LA today, so I will soon be able to iron out these kinks myself.
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09 May 2014 06:22 #23053 by SeByDocKy
Replied by SeByDocKy on topic V977 for adventurous!

victzh wrote: This is Devo12 build. I had one positive report on binding it with V977, but in a peculiar manner - when you open the page for binding, you switch protocol first to HM830, then back to KN and only then bind. Then it binds and basically works.

I have my heli departed from LA today, so I will soon be able to iron out these kinks myself.


Smell like packet size is not yet correct. For the Syma, SkyWalr protocol, Hexfet and testers had the same problem. The difference between these 2 protocols was the data packet size if I don't say stupidity

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09 May 2014 08:29 #23057 by dc59
Replied by dc59 on topic V977 for adventurous!

victzh wrote: Here you go but seriously, tie it down! When I first try a new protocol on small quadcopters they usually end up in a weird place, sometimes ruining something on the way.


Hi victzh,

Thanks for helping.
But I can't bind my Devo8 to V977,I'm using NRF24L01 not NRF24L01+/NRF24L01P,is that a problem? NRF24L01 dose not support 250Kb/S air rate right?

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09 May 2014 08:59 #23059 by SeByDocKy
Replied by SeByDocKy on topic V977 for adventurous!

dc59 wrote:

victzh wrote: Here you go but seriously, tie it down! When I first try a new protocol on small quadcopters they usually end up in a weird place, sometimes ruining something on the way.


Hi victzh,

Thanks for helping.
But I can't bind my Devo8 to V977,I'm using NRF24L01 not NRF24L01+/NRF24L01P,is that a problem? NRF24L01 dose not support 250Kb/S air rate right?


Yes unfortunatly the simple nRF24L01 is not supporting the 250 kbits. Only the + edition

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09 May 2014 09:26 #23060 by dc59
Replied by dc59 on topic V977 for adventurous!
Thanks SeByDocKy.
I will order a "+" ASAP.

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09 May 2014 12:42 #23065 by dc59
Replied by dc59 on topic V977 for adventurous!

victzh wrote: This is Devo12 build. I had one positive report on binding it with V977, but in a peculiar manner - when you open the page for binding, you switch protocol first to HM830, then back to KN and only then bind. Then it binds and basically works.

I have my heli departed from LA today, so I will soon be able to iron out these kinks myself.

Hi victzh,
Good news! it works!
I follow your instruction,change protocol to HM830 then change to KN protocol and binding,it works,it can use NRF24L01 to bind V977,no problem!
But the default setting seems 6G mode,very stable,I don't know how to change mode?(or just set parameter?)
thanks for great job.

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09 May 2014 18:59 #23077 by yoshi163
Replied by yoshi163 on topic V977 for adventurous!
Hi victzh!when binding the 977 which protocol may select?
Please answer my question and Thank you!

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09 May 2014 21:53 #23088 by victzh
Replied by victzh on topic V977 for adventurous!
@yoshi163 The protocol name is KN (which is mentioned in the first message of this thread).

@dc59 - you most probably have +, they phased out original long time ago. And even this is not a problem - KN protocol can use 1Mbps data rate, it's just not configured to do so in my code. But it's a matter of very small change and recompile. I will think about making it an option.

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10 May 2014 01:18 #23094 by dc59
Replied by dc59 on topic V977 for adventurous!

victzh wrote: @yoshi163 The protocol name is KN (which is mentioned in the first message of this thread).

@dc59 - you most probably have +, they phased out original long time ago. And even this is not a problem - KN protocol can use 1Mbps data rate, it's just not configured to do so in my code. But it's a matter of very small change and recompile. I will think about making it an option.


Hi victzh,
Thanks I will get a nRF24L01+ for my Devo8 :lol:
Would you please tell me which channel is for pitch?
I can't find it.

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