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Hello DIYDRONES,

its my frist post and I hope you dont mind when I post a prossible double post of a existing one.
I try since two weeks get a new firmware on my APM2.5 without a success.

I is working so far with my quad firmware and fly perfect (also with mission planner), but i want to use it for Y6 Hexa.
I have tried to flash with mission planner(many different versions), arduino (the arducopter version), bitburner, arvdude on win 7 and ubuntu, lately also with a usb ISP AVR programmer with AVR Studio.

I have also updated the ATMEGA 32u8.And its not a blown 3.3v regulator (I checked it).

As I understood (maybe I´m wrong) it could be a missing or wrong bootloader on the ATMEGA2560 or wrong set fuse/lock bits. The last thing what I could suggest is a wrong driver (but since i tried it on ubuntu and 3 different pc I dont think so). At my driver settings I cant set rts on.

I get that error from avrdude:

AVRdude -s -c wiring -p m2560 -P com9 -U "flash:w:F:\Downloads\ArduCopter(3).hex:a" avrdude.
exe:stk500v2_ReceiveMessage(): timeout avrdude.exe:AVR device initialized and ready to accept instructions Reading | avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: stk500v2_cmd(): short reply, len = 0 avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: stk500v2_cmd(): short reply, len = 0 ################avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: stk500v2_cmd(): short reply, len = 0 ################################## | 100% 15.07s avrdude.exe: Device signature = 0x004900 avrdude.exe: Expected signature for ATMEGA2560 is 1E 98 01 Double check chip, or use -F to override this check. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe done. Thank you

Maybe someone can help me.