Devo7e work

PhracturedBlue wrote: Just to verify: What is the process you tried to use to bind your V939?

made sure flysky was selected, powerd of tx
power on V939, power on TX. wait for bind countdown to end.

Also tried with a fixed id set and using bind in the model menu.

Edit, i should be getting a v911 tomorrow afternoon and ill test and see if that one binds.

The v939 binds fine to its own tx though.

if i cant bind to the v911 ill cutmy wires and use my multimeter and see if all wires are ok. Would measuring the resistance between ground and the other pins on the flysky module work?

Edit, just noticed but trying to bind with the husbanX4 protocol results in a tx reboot. With no error.txt when connecting through usb.

PhracturedBlue wrote: do you have the errors.txt file?
Deviation cannot create one, so you need to have one in the root filesystem, and it needs to have at least 1 byte of text in it
If it exists and is non-empty, deviation will rewrite it should an error occur

Here

Im using the one you have attached in the first post. Havent gotten around to fixing my build environment yet.

Edit, built and updated to ff0e6a2a6f71, it no longer does a hard reboot, instead it says binding 2 seconds, and never counts down.
Still wont bind to a v939

Hi PB,
Dose v911 module pin 4 GPIO connect with pin 5 GND?
Is it correct?

PhracturedBlue wrote: No. pin4 on the a7105 module should be left disconnected

After removed A7105 module from V911 TX,
I found pin 4 and pin 5 shorted, I am afraid that
I damaged A7105 board .........
Thanks anyway!

PB, is the soft-toggle of extra channels theoretically possible on the 7e? So we can either start debating possible methods to implement switching (and/or variance), or kill the idea before it goes too far.

Vlad, Rand, et al, is there a consensus on whether any antenna hardware mod is potentially worthwhile or not? ie. is the stock antenna as good as it's going to get so leave well alone?

PhracturedBlue wrote: Well, It took 2 hours to find, but I finally found the one-line bug, which has been present for 6 months but only affects the devo7e. what an annoyance.

Thank you, its binding just fine now. Was worried for a while that i might have damaged something as i was soldering at 400c to compensate for my low power iron.

Flight testing will have to wait till later, as im still looking for the note where i wrote down v939 motor orientation.

PhracturedBlue wrote:

dc59 wrote:

PhracturedBlue wrote: No. pin4 on the a7105 module should be left disconnected

After removed A7105 module from V911 TX,
I found pin 4 and pin 5 shorted, I am afraid that
I damaged A7105 board .........
Thanks anyway!

Sorry, I misunderstood your question. on The V911 module, pins 4 and 5 are shorted together. There is no cause for concern

Thanks PB!
It's a very good news for me.
Next,I will try to install A7105 in my 7E!

dc59 wrote:

PhracturedBlue wrote:

dc59 wrote:

PhracturedBlue wrote: No. pin4 on the a7105 module should be left disconnected

After removed A7105 module from V911 TX,
I found pin 4 and pin 5 shorted, I am afraid that
I damaged A7105 board .........
Thanks anyway!

Sorry, I misunderstood your question. on The V911 module, pins 4 and 5 are shorted together. There is no cause for concern

Thanks PB!
It's a very good news for me.
Next,I will try to install A7105 in my 7E!

Take care when soldering, seems walkera used lead free solder so it needs a higher temperature then normal to melt.

Vlad, Rand, et al, is there a consensus on whether any antenna hardware mod is potentially worthwhile or not? ie. is the stock antenna as good as it's going to get so leave well alone?

My Devo7e is still on route from China (another 2 weeks min), so I cannot comment on the practical problems changing the antenna onthe 7e, it seems to be molded into the main housing and others have indicated it is not an clean fix or upgrade.

Based on FCC test reports, the Devo 7e does not have a well-designed antenna to start with, it has low gain but more important for our deViation project, its bandwidth is quite narrow so the gain drops off towards the high end of the band. Changing the antenna could make it beter (or worse) at the frequencies/channels used by a particular protocol supported by DeViation.

I share the sentiment of PB and the others to keep hardware changes to the minimum. I would not try to fit another antenna unless you have some sort of field strength meter/analyzer covering the full 2.4GHz band that can potentially be used by the various Deviation protocols. Of course you can do the traditional Rx/heli range test, but you would need to ensure you test it per protocol over all its potential channels, as I believe some of the protocols, like Futaba FSSS reportedly, look for a quiet part of the band before selection its set of channels for is frequency hopping sequence.

Personally I believe Walkera designed the 7e as a lower power, short range entry level product to sell more of their indoor helis and quadcopters - upgrading it to an outdoor, full featured TX might not be worthwhile/practical for most Deviation users.

Just fixed all the motor directions and did a test flight with my v939. Seems to work fine.
Though it seems it has the same range as the devo module, ~2m at 10 mw.

Xermalk wrote: Just fixed all the motor directions and did a test flight with my v939. Seems to work fine.
Though it seems it has the same range as the devo module, ~2m at 10 mw.

Thank you for reminding me about soldering，
And it's good to know deviation works well on v939,
I will try v911..

dc59 wrote:

Xermalk wrote: Just fixed all the motor directions and did a test flight with my v939. Seems to work fine.
Though it seems it has the same range as the devo module, ~2m at 10 mw.

Thank you for reminding me about soldering，
And it's good to know deviation works well on v939,
I will try v911..

Just got my yellow v911, seems to work mostly fine.
The one i got seems to be a lemon and one of the servos seem to twitch.