V977 on 7e

Hi guys i need some help. My DEVO10 binding well to my v977 but is have no tail move to the left. Maybe is a module foult or the soldering. I tried 2 brand new tail sets. Any idea? Thanks.

Aenima wrote: Hi guys i need some help. My DEVO10 binding well to my v977 but is have no tail move to the left. Maybe is a module foult or the soldering. I tried 2 brand new tail sets. Any idea? Thanks.

u either have faulty board of heli but not likely.the other problem i can point is that ur rudder of ur transmitter is fault or broken. open transmitter and check all cable are in place. v977 transmitter are broken from time to time. this in not correct place to ask so it is going to be deleted anyhow.

hi guys

v997 use 8channel , but my tx only 7 chanel, so i can't use mode

3G/6G , any ideal for ideal ?

@Babay, @hexfet - I checked the "fix" patch. It's impossible to say what specifically it fixes, it's a total re-write of the protocol code. I don't say it's wrong, but I prefer this patch to be separated into 2 parts - one is a real fix (the nature of which is still unclear from this code and needs analyzing), and "code beautification" part. Another matter is that the patch also adds functionality, so actually it is 3 parts, not clearly separated from each other.

I will go on working on it, but don't expect me blindly applying the patch in its entirety.

That was my comment here , before the additional functionality was added. The implementation is changed so much it's difficult to evaluate.

Yes, I just wanted to confirm your conclusion, and because I'm expected to merge this also describe how I plan to do this.

victzh wrote: @Babay, @hexfet - I checked the "fix" patch. It's impossible to say what specifically it fixes, it's a total re-write of the protocol code. I don't say it's wrong, but I prefer this patch to be separated into 2 parts - one is a real fix (the nature of which is still unclear from this code and needs analyzing), and "code beautification" part. Another matter is that the patch also adds functionality, so actually it is 3 parts, not clearly separated from each other.

I will go on working on it, but don't expect me blindly applying the patch in its entirety.

Frankly speaking, I do not know either what was the real fix and why when I wrote the module . Because the problem is intermittent, I only knew it worked better after implemented the combination of the following changes :

1. Improve data integrity by adding a temp var in mixer.c. This can eliminate the situation that middle results are used in the TX ISR.

2. Instead of sending new channel data in every data packets, the data are reused in all 4 data packets of a hopping frequency. Assumed that KN can get smoother values.

3. The simplified data sending algorithm (write 10 bytes payload regs only) uses very short CPU time in ISR, assumed that the timing becomes more accurate.

4. Removed some unused RX register settings to ensure RX is off and not affect TX.

The real answer relies on the log at RX side when the servo stops working, that may be an luxury we never can get .

anthony wrote: hi guys

v997 use 8channel , but my tx only 7 chanel, so i can't use mode

3G/6G , any ideal for ideal ?

For the modified KN protocol, it can work with only 6 channels. The ch 6 is used for the flight mode.

If you only have 7E without switch mod, you can only get two of the three possible modes from the two values of the flight mode switch settings.


-100: 6 axis normal
0: 3 axis normal
100: 3 axis 3D

However, you can setup two 977 models, one for 6 axis and 3 axis normal, and another one if for 3 axis normal and 3D.

Hey guys I'm so glad you found out a way to solve this pb because i had the same , means i was loosing connection while flying for 2-3s which is a lot, and the movement were not smooth. I guess its what you describe when you say that it's "sticky". I thought this was first because of my remote or maybe the receiver of the v977. I'm so looking forward to try it soon (someone dropped a cuba libre cocktail on my lipo charger, its dead), i'll let you know if it's working for me.

thanks a lot

So the modified km protocol works great with the devo 7e. I don't have anymore the losses of connections, no more sticky behaviour its smoother, able to activate 6g mode, useful for flying inside. Its perfect . thanks a lot

Hello am new to forum and new to devo I am now trying to fly my v977 with my devo 7e I have already flashed firmware and am able to fly dsmx& dsm2 am now wondering is there already a protocol on new firmware to be able to fly v977 or do I require something else please help me out I know newbies are sometimes frustrating and difficult to bear but any help updated would be appreciated for I can not find anything that has been updated on my own searching thank you in advance PS. I have the tx from the v922 if that makes any difference....

chaos1 wrote: .......I can not find anything that has been updated on my own searching thank you in advance PS. I have the tx from the v922 if that makes any difference....

Really? Main Menu...."supported models" should have raised your interest.
docs.google.com/spreadsheet/ccc?key=0Any...kE&usp=sharing#gid=0
You will need a nrf24L01+ module.

Thank you for your reply I will check out that link I appreciate it

After working with the variant KN protocol and reading about good experience of V977 users, shouldn't we go ahead and apply the patch found here ?

PhracturedBlue wrote: I can't really evaluate the code changes, since as noted the code is a complete rewrite. I didn't write the original though, and if there is enough confirmation that this is better, I probably wouldn't be against replacing it wholesale with jimqjp's.

Hello,
i am new to this forum and the reason i bought a DEVO 10 TX was, that I wanted to fly my v977 with it.
So, I installed appropiate modul and nightly, but the result in controlling the v977 was disappointing (sticky controls, short range).
After installing the Patch from here everything went fine
Controls are smooth and range is much better.
So I can recommend this patch and would like to have it integrated in Deviation.

Thanks a lot for your work on the Deviation project!

Could the v977 owners please try the attached firmware? It is the current nightly source with the patch applied and extended by the protocol variant for FX-series helicopters, which use a similar protocol (Check protocol options to make sure you use "WL Toys" variant). From emulator and real life FX-series test it works fine, but currently I don't have a v977 available for testing. Thanks!

Did a short test with the provided patch on the v977: only 5 minutes just hovering indoor due to bad weather .
Everything worked good, no lags, good response.
I used the model file from this site .
Is that patch a variant from the one I mentionend before?

PS:
Babay wrote in this post : Hover Debugging is working also.
Does anyone knows, how to enable Hover Debugging?

Perfect. It is the same patch, but modified to support another variant of the KN protocol for other helicopter models. So it should behave exactly the same.

robbe wrote: Did a short test with the provided patch on the v977: only 5 minutes just hovering indoor due to bad weather .
Everything worked good, no lags, good response.
I used the model file from this site .
Is that patch a variant from the one I mentionend before?

u are so awesome Moeder, oh it has been a awhile and finally some one integrated that Russian code, haha, does this build gonna make it to the nightly build of Devo?