"I am having what may be a similar problem with an APM2. I have previously used this with Arduplane and and now trying to build a jDrones hexa. I am running windows 7 (64 bit) and APM Planner 1.1.75 mav 0.9 For some reason I get in an update loop…"
"I'm wondering the same thing as mine has just stopped connecting in Mission Planner - times out waiting on mavlink. I have the xstream adapter and the RX TX yellow leds are flashing in a way that makes it look as if communication is going on but…"