So I've literally tried everything.
Previously my Erle copter worked fine, I've had quite a few flights with it. But I wanted a fresh install, so I reinstalled frambuesa (running rpi3b with pxfmini) and set it all up again.
It all works fine, apart from the fact that the brain just will not go into esc calibration mode with the blue flashing light.
I've done the throttle up, power up, wait for light cycle.... But the brain always just goes straight into ready to arm mode with flashing orange light. I have set up my rc channels multiple times in mission planner, and it still won't go into esc cal mode.
In mission planner I've gone in and set the parameter to force start up in esc calibration mode.... And it still doesn't, it goes straight to orange light ready to arm mode.
Any ideas? I'm pulling my hair out here.