My Arduino Uno R3 does not respond, if i upload any code it is stuck on 'Uploading'. Also when i click on the reset button he does not reset or show the reset-LEDs
This error shows up now:
/usr/local/bin/arduino-cli compile --fqbn arduino:avr:uno --build-cache-path /tmp --output-dir /tmp/3812119710/build --build-path /tmp/arduino-build-4A5A1A54AE58E26984BA511F8B6C35AC /tmp/3812119710/sketch_jul18a
Sketch uses 444 bytes (1%) of program storage space. Maximum is 32256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.
Upload started
Programming with: Serial
Flashing with command:C:/Users/info/.arduino-create/arduino/avrdude/6.3.0-arduino17/bin/avrdude.exe -CC:/Users/info/.arduino-create/arduino/avrdude/6.3.0-arduino17/etc/avrdude.conf -v -patmega328p -carduino -PCOM4 -b115200 -D -Uflash:w:C:/Users/info/AppData/Local/Temp/arduino-create-agent427195077/sketch_jul18a.hex:i
avrdude: Version 6.3-20190619
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:/Users/info/.arduino-create/arduino/avrdude/6.3.0-arduino17/etc/avrdude.conf"
Using Port : COM4
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x20
avrdude done. Thank you.
Did it use to upload before?
It looks like transfer speed or reset pulse sync problem.
Yes, it did! But suddenly this morning it didnt anymore.
Hi,
What version IDE?
What OS?
Can you find the com port in the IDE?
Can you see the com port in the Device Manager?
Thanks.. Tom... 
1 Like
The IDE version is 2.1.1, i have Windows 11 and i see my arduino Uno in the device manager!
@TomGeorge was asking also about port in the IDE.
What is the UNO behavior during uploading process? I mean LEDs.
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Have you tried Version 1.8.19?
Thanks.. Tom.. 
Only the on LED, its on com port 4.
COM4 is it correct port for sure?
Is there something on pin 0,1 connected?
If you press on-board reset button what happen with LEDs?
If i press reset, nothing happens.
I think, it is bad. L should blink 3x fast. It means the bootloader is in action. Maybe uploading the bootloader would help if the MCU is not damaged somehow. However, for the bootloader uploading you will need ISP programmer or another Arduino with Arduino as ISP sketch.
Okay, can you please explain how to do it with another Arduino?
And what is the MCU?
MCU stands for microcontroller unit.
I meant the main MCU on the Arduino board. It is ATmega328P on Arduino UNO R3.
Okay, i tried it with this video: How to Burn Boot-loader to Any Arduino ! - YouTube
But i get this error message when i want to burn the bootloader:
avrdude: Yikes! Invalid device signature.
Double check connections and try again, or use -F to override
this check.
Failed chip erase: uploading error: exit status 1
Definitely go through it properly again.
However, there is a possibility of damaged MCU, so it should be fine to have a spare one. I hope you have UNO with socket version, not SMD.
1 Like
Hi, @0tte
Can you please post some images of your Arduino controller?
Thanks.. Tom.. 