I’m having a similar problem i think to http://ardupilot.com/forum/viewtopic.php?f=82&t=12316
PX4 turned on, Tx turned on
Rx has solid orange light to suggest connection.
APM 2.0 connection via usb and/or 3dr
Pre-arm check. Rc not calibrated.
All the channels are showing as active and respond to Tx adjustments.
I go to calibrate
Then i get the message ‘radio control is not active or turned on.’
What do I need to do?
thanks in advance