yesterday I was working on my desktop computer.. I just installed the old drivers on my laptop AND RESTARTED (as I were requested) and changed the baudrate from 9600 to 57600 under device manager -> comport. (dont thing this is neccessary)
AND IT WORKS! Upload is working just fine!
ps: just in case i would have shortened the bottom+top ICSP pins on the right and those on the left while connected via usb but my upload still works: could something be damaged ?
I got my USBtinyISP with that one I'm able to flash my sketches through this ISP programmer!
And I got a new Nano V3 (the third one - same brand, two different suppliers) - still unable to flash directly via FTDI/USB.
Either the FTDI/UART-Interface of the complete series is broken or it's a driver issue.
I tried 2.8.28 and 2.8.24 from this source: http://www.ftdichip.com/Drivers/VCP.htm, the 2.8.28 from Windowsupdate (which seems to be the same as the one provided by ftdi), and the 2.8.14 shipped with arduino IDE. The COM-port is set up correctly without errors for all three of them, but while flashing via usb I still get the message:
avrdude: stk500_getsync(): not in sync: resp=0x00
Reflashing the bootloader works, but does not solve the problem.
I have no plan how to get that to work, still I would be happy for any hint...
Can you provide a link to the Nano's you have?
Are these official Arduino Nano's or clones?
Which bootloader are you flashing onto them?
Since you are able to flash sketches with the ISP, can you verify the serial interface is working by flashing a sketch that uses the serial interface and interact with the Nano using the Serial Monitor. Start with the ASCIItable example or something similar to that.
This will help narrow down if you are having problems with the USB - serial interface or if it is isolated to the bootloader.
To the first I flashed the default bootloader shipped with arduino 1.0.4 (Select Arduino Nano w/ ATmega328), Tools "install bootloader". The second one has the untouched bootloader which was shipped with the divice. (Third arduino went back to supplier)
Start with the ASCIItable example or something similar to that.
I have flashed ASCIItable onto both. Arduino Serial Monitor is showing lots of blanks. RealTerm shows me 8448 "NUL" Values. TX led on Nano is on while transmitting.
Hi, I had similar problems with two Nanos from ebay. (W7, 64bit and XP, FTDI driver Version 2.08.28)
I used the exe installer from the FTDI site to install the previous driver version.
This solved my problems. http://www.ftdichip.com/Drivers/CDM/CDM20824_Setup.exe
(Changing only the comport driver in the device manager didn't work for me)
Thank's for that hint - I used the .exe but I had no success.
I found out that changing comportdriver and .exe didn't change all files of the driver. I manually replaced the files with the ones shipped by ftdi with 2.08.24 and I'm running the following driver files right now (all placed under C:\Windows\system32):
drivers/ftser2k.sys Version 2.08.24 by FTDI Ltd.
drivers/serenum.sys Version 6.1.7600.16385 (win7_rtm.090713-1255) by Microsoft Corporation