I`v had a problem since buying my new APM 2.5, the ESCs beep every 2 seconds. This shows an abnormal output. I have tried calibrating the ESCs and reloading the firmware 20 time and still no joy. I have just tested the output with an ociliscope and found there is no output signal. I tested the output from the RC reciever first and thought I should get a similar square wave pattern. Unfortunatly all I get from the APM is a straight line on all the outputs. I have looked at the data from MP and all looks good with data changing as I tilt the quad on all outputs.
I am powering it from the ESC BECs but for some reason I only get 4.63V at the input end of the APM. Is my board fried and I need a new one ???
Replies
In regards to the 4.63V: Most ESC's only output approximately 5V. In reality it's usually a bit lower. You could try using a dedicated UBEC instead - they tend to be closer to the 5V mark.
For the lack of outputs: The APM will only output to the servos if it is armed.