I have just received an APM 2.5 from 3DR. I have the lastest Mission Planner installed (1.2.60 mav 1.0). I updated to the lastest ArduCopter Firmware (V3.0.1). My Dx8 was calibrated (throttle low is 998), all sticks are throwing in the correct direction. I have calibrated the ESCs using the following process:
I plugged in the battery with the throttle high on the transmitter....red and blue LEDS flashing....unplugged the battery and then plugged it back in. I heard beep beep beeeeep from the ESCs (Turnigy Multistar)followed by beep pause beep pause beep. I then lowered the throttle and got beep beep. The motor are working just fine after this. I unplugged the battery and then plugged it back in.....heard beeeep beep for the ESCs. APM will not arm.
The LEDs are showing single blue flash with a double red flash and will not arm.
Here's a video showing what was prolly poorly written out.
Replies
Have you gone through setup ?
Accelerometer , compass ?
As board will not arm until these are completed.
A
You may have to lower your throttle trim to obtain an arm, if the cal was performed at center trim.
As long as you are not experiencing a beep-beep-repeat from the ESCs they have been calibrated.
Give the trim a *couple* clicks down, no more, then see if you can arm.
-=Doug