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Permalink Reply by Derek Golding on May 10, 2012 at 3:52pm

Here are the settings with both radios plugged into the computer, still no connection when the air side is plugged into the UAV, any suggestions?

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Permalink Reply by Jake Stew on May 10, 2012 at 5:45pm

Is it possible you changed the default telemetry speed on the APM?

I didn't see any reason to have the baud rate set lower than the air rate, so I had changed it.  Of course I didn't change it on the APM, so it didn't work.

It seems kind of silly to have the bottleneck be on the PC interface.  Not sure why they have it set like this as the default.

I would test the modems first on your computer to make sure they work.  If they do work then it has to be a problem with your APM.

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Permalink Reply by Derek Golding on May 10, 2012 at 9:48pm

Both raidos working wll on the computer, as soon as they are plugged in the lock on and the led's turn green.

Anyone have any suggestions on where to go from here?

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Permalink Reply by Jake Stew on May 11, 2012 at 8:06am

Try different settings under remote baud.  If that doesn't work then you have a bad APM board.

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Permalink Reply by Derek Golding on May 11, 2012 at 12:18pm

where can I access remote baud?

Bought this at Christmas from jdrones, have managed 2 short flights  so far so will be very annoyed if I have a bad board!

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Permalink Reply by Jake Stew on May 11, 2012 at 12:52pm

On the picture you posted just above it's the second setting down on the remote side.  This is the setting that controls the air module -> APM baud rate.  If it's set wrong it will produce the error you describe.

It should be 57 by default, but it's possible the APM is communicating at another speed for some reason or you accidentally changed it somehow.

Since your radio modules are working you just aren't getting communication with the APM for some reason.  Check your TX/RX wiring (try switching them) and changing the speed as I mentioned.

Some devices use a more correct TX->RX and RX->TX wiring scheme and some mislabel them for easier connection so that you connect RX->RX and TX->TX.  So you just have to try each way until it works.  If you're using the telemetry cable just make sure it's connected like in the pictures.

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Permalink Reply by Derek Golding on May 11, 2012 at 5:26pm

Hi Jake,

More success with that, they appear to be talking with each other now with the air side connected to the UAV.

Unfortunately, still no connection.

Com8 at 57600. Slooowly getting there though! Where to from here?

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Permalink Reply by Derek Golding on May 11, 2012 at 8:14pm

Whahoo! Sorted, all working now!!

Thanks for all your help, I'll post some photos of it flying as soon as I have clear skies. Looking forward to this!

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Permalink Reply by Jake Stew on May 12, 2012 at 10:56am

Awesome!  You're now using the best watt for watt telemetry radio out there.  Looking forward to pics and video.

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