[HighAltitude]

After setting up my Revo board using basic/default settings on the setup Wizard, and some basis flying my quad, I received the Oplink Mini Ground Station in the mail yesterday and hooked it up to the laptop I'm using for my Librepilot GCS software.  It installed its driver and all seemed well until I attached the antenna to the receptacle on my Revo board and powered it up to see if it was talking to the GCS.  No joy.  The Flight Data screen didn't show any data.
I disconnected the Mini GCS from the USB port on the computer and the antenna from the Revo and connected the computer and Revo through the serial cable I used for initial setup. Librepilot GCS wouldn't identify that it was connected to the Revo board.
I tried connecting to the Librepilot I have running on my desktop machine.  As with the laptop, the GCS doesn't recognize that the Revo's connected.
Any ideas?

[hwh]

For the oplink-mini the wiki article https://librepilot.atlassian.net/wiki/display/LPDOC/OPLink+Configuration gives the instructions on how to set it up.  I'm hoping you didn't set the power off zero since you seem to be saying you powered them up without antennas attached.  Most of the time that will damage the output stage the same as any transmitter.  No transmitter should ever be powered up without an antenna.  The software defaults to zero power to protect against this.

Before we can work on the above we need to get the revo connecting to the PC again.

When you say "through the serial cable" do you mean the usb cable?

As a first step if the GCS isn't recognizing the revo I'd try disconnecting it from the computer, go to the firmware tab, click upgrade and erase (this will clear the boards settings, you can try with just upgrade first if you want), and connect the board when it tells you to.  If that doesn't work try the same thing but with the rescue button instead of upgrade and erase.

[HighAltitude]

Thanks for the help.
"Upgrade and Erase" got GCS talking to the Revo board again.
It's still a bit of a mystery why they lost communication.
The specific sequence of events leading to the malfunction was:
1. Connected my laptop to the Oplink Mini Ground Station with antenna attached with the cable I've been using to configure the Revo (conventional USB connector on the computer end and micro B connector on the Revo end)
2. Followed the prompts to load the driver (apparently successful)
3. Loaded Librepilot
4. Plugged the antenna lead into the receptacle on the Revo board and connected the antenna
5. Connected the flight power battery to the power distribution board
6. Waited until the Revo board went through its bootup LED blinking
7. Opened the Flight Data screen on Librepilot
8. Moved the vehicle around to see if attitude/heading changes showed up on the Flight Data display - they didn't.
9. Disconnected the flight battery, USB cable, and turned everything off.
Subsequently, Librepilot couldn't recognize the Revo board.
I'll follow the setup instructions on the Wiki article you referenced the next time I try it.

[hwh]

Happy to help and that the revo is talking through USB again.   

There's nothing in your list that should have made the revo not connect via USB.  Maybe just a random power glitch as the battery was disconnected.

The oplink shouldn't have connected with the revo unless you configured it according to the wiki so that part was just normal operation.  The revo won't connect unless it knows the device id of the oplink.

Let us know how it goes.

[HighAltitude]

It's great when technology works!  The Oplink transmitter on my Revo board is now talking to my Mini Ground Station, which is talking to Librepilot GCS running on my laptop.  Now I have to figure out how to watch the Flight Data Screen and the aircraft at the same time........

[hwh]

...Now I have to figure out how to watch the Flight Data Screen and the aircraft at the same time........

Your eyes don't point in different directions?