Hi, just received my set of 3dr radios this morning and have installed them.
I'm unable to get a connection between the two, both have green blinking led's so working ok.
When connected to the APM planner (v1.1.83 mav 0.9) I can see the settings on the usb side but none from the uav side.
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.
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?
Try different settings under remote baud. If that doesn't work then you have a bad APM board.
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!
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.
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!
Awesome! You're now using the best watt for watt telemetry radio out there. Looking forward to pics and video.