I cant get my ESCs to work they beep every 2 seconds indicating a bad input. How can I test the output signal from my brand new APM 2.5 board before I go and buy another 4 ESCs.
I have calibrated the ESCs 25 times now and it still refuses to work.
They all work perfectly pluged dirrectly into the RC receiver but thats not getting my quad up in the air.
I am really stuck here guys give me a hint please.