ARDUCopter Heli / APM 1.1.31 Can not establish connection

I am stuck. I have connected the board to my laptop before, I was able to move the board and watch the artificial horizon move with the board. Now I have installed everything on my TREX 600 and I went to plug it in and got this error:

can not establish connection

system.exception: no mavlink heartbeat packets were read from this port - verify baud rate and setup

it might also be waiting for gps lock

apm planner waits for 2 valid heartbeat packets before connecting at ardupilotmega.mavlink.open(boolean getparams) in ....

The gps is unplugged to avoid the lock step. any suggestions?

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DeveloperPermalink Reply by Randy on February 4, 2012 at 4:39pm

If you have arduino installed could you try connecting with Arduino's Serial monitor and see what's coming back from the APM?

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Permalink Reply by Jeremy Steffen on February 4, 2012 at 6:44pm

We discovered that the the mounting screw was contacting the board and shorting the circuit

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