Replies to This Discussion

Permalink Reply by cxgiacomo on September 3, 2012 at 9:33am

Thanks for all the help! I ended up running the 3dr config tool that was posted earlier. It looks identical to the GCS 3dr setup, but worked out fine for me. if you could let me know what joystick/telemetry/baud rate settings allow for you to have better fidelity and less lag with the joystick, i would really appreciate it. I don't have ECC enabled, and almost all of them are at 1 or 0, except for R/C, and it is still REALLY laggy and hard to control

Permalink Reply by road_rascal on September 7, 2012 at 1:41pm

I still can't get the radios to connect.  Here's a screenshot of my com settings and Mission Planner settings.  I don't see the settings for the air radio on MP.

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Permalink Reply by Ger Harris on September 7, 2012 at 2:10pm

I recently ran into a similar problem but I think my symptoms were a little different from what has been described here. I use a laptop for telemetry, but the battery isn't what it used to be so I bought a UPS for the field. Being the thorough geek that I am, I loaded the USB Battery drivers so that I could see the actual charge on the UPS unit. When I got to the field I was unable to use my telemetry despite getting green link lights on either side of my 915MHz links.

What seems to have happened it that the UPS battery loaded a driver that seemed to arbitrarily change and connect to any software based COM port driver. I couldn't just "close" the offending program, I had to go into services and manually shut down the service before I could connect to my telemetry links again.

I expect this type of behavior could easily happen with any other device that loads virtual serial drivers into your computer. Between UPS, Arduino units, USB-to-Serial adapters something could easily change your COM port settings or connect to your port effectively locking you out. Beware that you may not be actually connecting to the COM device you think you are.

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Permalink Reply by Veikko Vierola on September 7, 2012 at 4:50pm

1. Connect your radio with FTDI cable to your computer.

2. Choose normal and advanced parameters and save them to your radio.

3. Remove the radio from FTDI cable.

4. Now repeat the exact same procedure to the other radio with exatly the same parameters.

Now your radios are matched and should link together immediately when you power them both up.

When radios are connected and you have a good link, then you are able to change the parameters of the radios at the same time. Ground radio parameters are changed via FTDI cable and the Air radio parameters are changed by the Ground radio sending  wireless AT commands....

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Permalink Reply by road_rascal on September 8, 2012 at 5:26am

Ok, so it looks like I need to get an FTDI cable then.

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Permalink Reply by road_rascal on September 8, 2012 at 2:51pm

Solved the problem.  A friend of mine has the exact same 915 radios which he hasn't used yet.  I connected both his ground and air radios to my laptop and they connected right away.  I then connected his ground radio to my air radio and they connected no problem,  Lastly I connected my ground radio to his air radio and they did not connect.  So it looked like I had a problem/issue with my ground radio.

I then reconnected his ground and air radio to my laptop, loaded the settings, disconnected his ground and air radios, connected mine, saved the settings and la-te-da, they connected.  So it appears that my ground radio did not have the proper settings from the factory.  Here's a screenshot from my friends setup.  Completely different from mine.

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