[J:-osh]

Hello !
In actual fact I wanted to report a bug.  Unfortunately this seems not to be possible for normal humans, I didn't find a way to do that.
The bug:

When I try to connect my new Revolution FC, the Rx-Connection doesn't work !
It only works if I connect the FC on the Firmware-TAB and make a firmware-update. After this the connection
is working fine an I can setup the FC.
Bootloader-Version is  V. 6, Firmware-Version is  16.09 from 12.12.2016  23:37, FC is detected as a Revolution
(ID: 903 )  everything seems to work as it should.
BUT !: If I disconnect the FC from power and try to connect again the

connection   of    Rx  doesn't  work   !

I am sure many of you know this bug ! ( see attachment )

What I've already tryed out:
I work with LibrePilot for Ubuntu 14.04 on a Linux-Mint System 32 Bit.
I also tryed on a Linux-Mint System 64 Bit. The same problem.
I also tryed on a Windows XP 32-Bit System. Same problem.

On all this Systems the older CC3D (not the Revolution) works perfectly !

So I guess it must be a problem with the Revolution - Firmware.

What do the experts say to that problem ?

Regards

J:-osh

[TheOtherCliff]

I have not heard of such an issue before, but it is fairly common to get a bad USB cable.

One other thing is that some laptops don't make enough power on the USB to run the board reliably.

So things to test (just for a test if nothing else) are:
- wiggle cable both ends (and there may even be a bad wire in the middle)
- try a different USB cable
- try a different computer

When it doesn't work, what do the LEDs look like?  If they flash like it is working, then it has USB power, but not USB data.

[J:-osh]

Hi TheOtherCliff,

yes, as you've read, I've already tryed out your advices.

I've tryed out on Linux 32Bit, 64Bit and also WinXP.

It works nowhere !  The FC I used at first, the old CC3D works everywhere.

So I really guess, that the controller has a hardware problem.

On the other side, when I make the firmware update ( with the same firmware already running on the FC )

the communication works how it should.  Only when I disconnect the system from the power supply, it won't

connect afterwards.

So I think it is not a problem of the LibrePilot GCS but a problem from the controller-board.

I am very well used to microcontroller-boards.  I also been wondering as I found this problem nowhere in the

internet.  But there is a trouble-shouting from LibrePilot. This trouble-shouting says that it is a problem with the

driver of the hardware and recommends to install the driver again.  But it is  a Windows-Problem an a Windows Driver.

I can come along with the problem when I allway make a new firmwareupdate and then program the setup-log-file

But it's still really annoying.  This controller was not a controller for small money but for  EUR > 40,- .

Thanks for your answer !

Kind regards

J:-osh

[TheOtherCliff]

When it doesn't work, what do the LEDs look like?  If they flash like it is working, then it has USB power, but not USB data.