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Topic: Problem uploading to Pro Mini via FTDI Basic USB (Read 2371 times) previous topic - next topic


It seems like this is a pretty common problem. I have trawled the boards and tried lots of things out. Brand new Pro Mini 5v 16Mhz. New FTDI Basic too. Have tried with tools/board select = Pro Mini and several others with same result each time. Have same 57600 set in code and for USB properties. Also have 'Set RTS on close' selected in properties for the USB port as per Arduino guidance notes for Pro Mini.

Have tried on 2 Macs and PC running Parallels and get same result every time. Green on board led (and led connected to out 13) flashes on initial connection and at start of upload. Pushing reset button also flashes LED. I have previously successfully connected to Mega Pro, so I think drivers are OK.

Any advice or ideas would be appreciated. By the way, I am very much a newbie, so be gentle with me please.

Verbose output is below:

Binary sketch size: 1010 bytes (of a 30720 byte maximum)
C:\Users\Administrator\Documents\arduino-0021[1]\arduino-0021\hardware/tools/avr/bin/avrdude -CC:\Users\Administrator\Documents\arduino-0021[1]\arduino-0021\hardware/tools/avr/etc/avrdude.conf -v -v -v -v -patmega328p -cstk500v1 -P\\.\COM4 -b57600 -D -Uflash:w:C:\Users\ADMINI~1\AppData\Local\Temp\build2720414113592612904.tmp\sketch_dec21c.cpp.hex:i

avrdude: Version 5.4-arduino, compiled on Oct 11 2007 at 19:12:32
        Copyright (c) 2000-2005 Brian Dean,

        System wide configuration file is "C:\Users\Administrator\Documents\arduino-0021[1]\arduino-0021\hardware/tools/avr/etc/avrdude.conf"

        Using Port            : \\.\COM4
        Using Programmer      : stk500v1
        Overriding Baud Rate  : 57600
avrdude: ser_open(): setting dtr
avrdude: Send: 0 [30]   [20]
avrdude: Send: 0 [30]   [20]
avrdude: Send: 0 [30]   [20]
avrdude: Recv:
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: Send: Q [51]   [20]
avrdude: Recv:
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51

avrdude done.  Thank you.


Hi, sorry, I have no answer for you, but I just have the same problem, I also tried to program the Arduino Uno using an  USB to Uart bridge (CP2102) http://www.silabs.com/Support%20Documents/TechnicalDocs/cp2102.pdf and connecting it to the tx and rx pins, but I can't program it anyway... Anyone knows the solution?


You probably checked this, but you are selecting the correct COM port also?
I have a duemeilanove and several prominis, I switch back & forth lot. Duemilanove uses COM3, Promini uses COM7, I almost always forget to check and get the same error with the first programming attempt after changing from using one arduino type to the other.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.


Yep I have the right com port. It is talking to it too. The green reset LED flashes twice when I try to upload.


Looks like it was a bad Pro Mini. A second board arrived in the mail today. I connected it up and straight away it worked fine. I recommend anyone having this problem tries this before wasting loads of time trying to work out what they have done wrong!


That's a bit of a bummer! I have one damaged, had a loose wire in a box that shorted something  and took it out. Was looking for a replacement chip, haven't gotten there yet.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.


Thanks for your replies, i finally figure out what was my problem, I think that my Arduino mini (bought from china  :-/ )has been flashed without or  with a wrong bootloader. I used my Arduino uno as ISP following this guide:
and then programmed tha Arduino using the same connections as described here:

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