Have you tried connecting via Arduino serial monitor? If you can connect via Arduino, you know your board is ok. I have this issue sometimes too and it's intermittent and works differently on different computers :( I attribute it to the fact that I am running APM Planner in virtualization via VMWare Fusion...sorry I can't be more help.
2.0.54 is out. hoping it will fix our problems..
just a return authorization so that they can go over your board and issue a return/exchange if necessary.
Thanks for you hint, but Now it says: 'Upload succeeded, but verify failed: exp 75 got 70 at 2' - what can be reason for that?
A quick question, is this a 3.3v FTDI cable or 5v FTDI cable?
I am experiencing the same problem with my APM2.0, it works fine but I am stuck with 2.9 firmware, I get the same msg
" can't detect apm version. Please check your cabling" did you find out what was wrong with it?, please help...