"Hell,Richard!! I 've disabled all parameters for the failsafe in full parameter or advance para [  forgot now,]  all numbers that associate with failsafe to zero, but still won't arm APM2.6 board has solid Blue LED and RED flashing [unarmed ] and…"

"Hello, congrats!!! but for me I have used only GPS and no compass also [ waiting for compass] but after disable failsafe  parameters [ all to zero no.] still won't arm , Blue LED on APM board is solid but the red is flashing
[ unarmed] and on GPS…"

"Yes , it is 115200 baudrate and the box for COM port is says "NO DEVICE " instead of COM port no. or some other kind of com port.and I just did hold reset button and connect Ardu but still the same. my problem is can not download driver software for…"

"Hi,Kim. was away for a while and saw your post, thanks. I tried to uninstall and disconnect/connect but has no luck and reinstalled driver software again when connect Ardu to laptop found the same port i,e arduino 2560[com21]  then right click it…"

"Hi,Kim. thnks again. Downloaded arduino cc [ arduiono-1.0.5-r2]  ,  what I'm suppose to do after loading this file..? Would you mind walk me thru by phone? please.. thanks  alot."

"Yes, it show in device manager arducopter 2560 [ com 17] and also in printer but has Yellow triangle symb ol ,i,e need to fixed it,got auto fixed from windows and got result " Driver not install in this com port. it means never been installed. so,…"

"Hello Swift. Thanks for replied.Yes, when connect to computer and open mission planner it shows Ardino 2560 [COM 18] in device manager and in printer.but when after attempting upgrade driver software it shows this message " Windows found driver…"

"Hello Swift. Thanks for replied.Yes, when connect to computer and open mission planner it shows Ardino 2560 [COM 18] in device manager and in printer.but when after attempting upgrade driver software it shows this message " Windows found driver…"

"Hello,thanks for replied.Yes,I tried to load firmware from mission planner but nothing happened and the version number of Hexcopter doesn't show even version no. , for instance it shows"Arducopter V xx.x some like that and no version number suppose…"

"Hello, I have the same problem. it shows com&lpt comport but under that arduino 2560 but has no com port number listed , before that i have port no.3 ,since i fixed my 3.3 v reg.ic and now can't connect to MP"

"Thanks for infos. I have bad 3.3 vt.regulator ,i,e5.5v and I've changed 3.3 vt reg. IC chip and now it 's fine. i,e 3.3Volts but still couldn't connect to mission planner with this message" no heartbeat received or something like that and yellow LED…"