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Topic: avrdude: stk500_getsync(): not in sync: resp=0x00 (Read 2221 times) previous topic - next topic


hello, so the problem on my Arduino Uno board is that i made somo connections with it and tried to compile and upload a sketch, by doing this i got this error : "avrdude: stk500_getsync(): not in sync: resp=0x00".

I've seen other posts but they have yet another problem one wich has two more 0x'XX' problems and the answers they gave to them is a conecction problem, in my case i've tried on uninstall the drivers, also as the arduino program and reinstall them to many times and the problem doesn'n disappear, it would be nice if someone can help me with this one, thanks!!


I seem to have the same problem.
Specific with windows7-32 bit pc.
I allready did try the 0022 software version
I did click on the Uno version in "board".
I did check the monitor (shows only com1)
In system/device manager: there is never anything at all under this port while the uno is connected.
The flip software from atmel i did try and was not the right version or..... i don't know

Also is their (atmel) high speed hot helpline very dead!!!


i had the same problem selecting the wrong device.
Try the others too, if you're not sure.


I have this same problem on my standalone circuit. I'm using an preloaded Uno bootloader on ATMEGA328 from Sparkfun. I'm also using the FTDI breakout board and my drivers are properly installed.

I can't figure out where/if a connection is wrong. I have the reset pin pulled to high with 8kOhm and there is a 0.1uF cap from DTR to Reset, and the chip is getting proper voltages (5V) to Vcc, and AVcc.

So I programmed the chip in my Arduino Uno, the popped it into my standalone and it doesn't function. The digital outputs don't work and I don't get anything on the serial monitor like I should. The one weird thing is that when I put the chip back into my Arduino. It acts like there's no program on the device and doesn't work unless I upload a new sketch.


I have the same problem on Ubuntu 11.10(64Bit). with version 1.0 and 0.22. On my Windows 7 (64Bit) with 1.0 there is no problem. Actually it seems when Arduino-IDE starts uploading, the board gets resetted somehow.

This fault is ridiculous and totally annoying!!! FIX IT!


The chip in my arduino uno will work fine when I send it a sketch. If I disconnect and reconnect, the chip doesn't function and gives me 3 blinks - delay - 3 blinks - delay - repeat. Seems like the chip keeps rebooting. If I send it a new sketch, it will operate like normal again.



I got the same issue when trying to bootload a boot.file onto it using the terminal with this

Code: [Select]
avrdude -c Arduino -P COM1 -p m328p -F -U :w:ATmegaBOOT_w68_atmega328_pro_8MHz.hex
Accelerate to 88 miles per hour.


I just had this response problem: avrdude: stk500_getsync(): not in sync: resp=0x00.  I had seen this before when I first started with Arduino's.  My laptop came with Windows 7, but I had to down grade to XP to support some equipment where I work.

Here is how I was able to get it to work:

I went into the folder: D:\arduino-1.0.1-windows\arduino-1.0.1\hardware\arduino and opened the boards.txt file.

I changed the line: uno.upload.maximum_size=32256 uno.upload.speed=115200
to: uno.upload.maximum_size=32256 uno.upload.speed=19200

Then I got this error: avrdude: stk500_getsync(): not in sync: resp=0x80

I changed the upload rate to 57600: uno.upload.maximum_size=32256 uno.upload.speed=57600

This fixed my problem and my LED is now blinking.  Evidently the upload speed is different on this laptop because my other laptop does fine with the 115200 speed.

I hope that this will help out others with this problem.


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