# I cant upload code to my arduino uno r3 **URL:** \ **Category:** Uploading\ **Created:** [April 22, 2025, 6:50pm UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827 "2025-04-22T18:50:12Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![x8fz](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/x8fz/32/1212994_2.png) [@x8fz](https://forum.arduino.cc/u/x8fz)\ **Post date:** [April 22, 2025, 6:50pm UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/1 "2025-04-22T18:50:12Z")
i have a problem uploading even simple code to my arduino uno and i get this message : ```arduino 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. avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xad avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0xad avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0xad avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0xad avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0xad avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0xad avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0xad avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0xad avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0xad avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0xad ``` Failed uploading: uploading error: exit status 1 i am using the version 2.3.6 of arduino ide and windows 10 Note : i saw a topic about a test called loopback and it worked fine for me but still no code goes to the arduino ---
**Author:** ![LarryD](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/larryd/32/215550_2.png) [@LarryD](https://forum.arduino.cc/u/LarryD)\ **Post date:** [April 22, 2025, 6:53pm UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/2 "2025-04-22T18:53:42Z")
- You may need to burn the bootloader again. - Have you uploaded code to this Arduino before ? - What board is the IDE set to ? ---
**Author:** ![x8fz](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/x8fz/32/1212994_2.png) [@x8fz](https://forum.arduino.cc/u/x8fz)\ **Post date:** [April 22, 2025, 6:59pm UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/3 "2025-04-22T18:59:19Z")
1. how can i do that 2. yeah i was using it fine 1.5 year ago 3. it is on the right thing (arduino uno) ---
**Author:** ![BitSeeker](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/bitseeker/32/1241632_2.png) [@BitSeeker](https://forum.arduino.cc/u/BitSeeker)\ **Post date:** [April 22, 2025, 8:22pm UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/4 "2025-04-22T20:22:09Z")
- is the correct port selected in Tools -\> Port? - is the correct driver installed (e.g. CH340 for a clone board)? (Can you show a screenshot of the COM ports in Device Manager) - have you tried another USB cable? (Ok, you said that the loopback test seems to work so theoretically its OK, but just to be sure and rule it out.) - is the port opened by something else, e.g. another IDE instance or another serial terminal program? ---
**Author:** ![x8fz](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/x8fz/32/1212994_2.png) [@x8fz](https://forum.arduino.cc/u/x8fz)\ **Post date:** [April 22, 2025, 9:30pm UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/5 "2025-04-22T21:30:38Z")
1. yes it is correct (com6 and even writes arduino next to it) 2. yeah all drivers installed ![Screenshot 2025-04-22 211009](https://europe1.discourse-cdn.com/arduino/original/4X/9/9/b/99b0f1e2f2637963f91a426c38c683052f75fc11.png) 3. nope i didn't and i don't have but the cable is working like you, it is also working with printer 4. at first only arduino ide was opened and it did not work, i used another blocks ide and same error ---
**Author:** ![sterretje](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sterretje/32/391294_2.png) [@sterretje](https://forum.arduino.cc/u/sterretje)\ **Post date:** [April 23, 2025, 4:37am UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/6 "2025-04-23T04:37:22Z")
When you press and release the reset button on the Uno, do you get a few (I think 3) quick flashes of the L-LED? ---
**Author:** ![x8fz](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/x8fz/32/1212994_2.png) [@x8fz](https://forum.arduino.cc/u/x8fz)\ **Post date:** [April 23, 2025, 11:42am UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/7 "2025-04-23T11:42:24Z")
No, the reset button does nothing to my arduino led ---
**Author:** ![sterretje](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sterretje/32/391294_2.png) [@sterretje](https://forum.arduino.cc/u/sterretje)\ **Post date:** [April 23, 2025, 1:26pm UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/8 "2025-04-23T13:26:48Z")
In that case I think that either the boot loader is corrupt (not very likely) or that the 328P processor is faulty (more likely). You can also run the loop back test ([Loop-Back Test Instructions](https://forum.arduino.cc/t/loop-back-test-instructions/73046)). That will test the 16U2 serial-to-usb converter on your board. If the loop back test also fails you have somehow done serious damage to the board, e.g. connected 12V to the 5V pin. If the loop back test passes, you can try to burn the bootloader as mentioned by LarryD (post #2, instructions on the web) or replace the 328P (you can buy them with the bootloader pre-programmed). ---
**Author:** ![x8fz](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/x8fz/32/1212994_2.png) [@x8fz](https://forum.arduino.cc/u/x8fz)\ **Post date:** [April 23, 2025, 6:46pm UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/9 "2025-04-23T18:46:25Z")
i already did the loopback test and it worked fine i was getting my input back ---
**Author:** ![x8fz](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/x8fz/32/1212994_2.png) [@x8fz](https://forum.arduino.cc/u/x8fz)\ **Post date:** [April 26, 2025, 4:57pm UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/10 "2025-04-26T16:57:35Z")
umm hello ? ---
**Author:** ![sterretje](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sterretje/32/391294_2.png) [@sterretje](https://forum.arduino.cc/u/sterretje)\ **Post date:** [April 26, 2025, 5:03pm UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/11 "2025-04-26T17:03:11Z")
In post #8 I indicated that you can try to burn the boot loader or replace the 328P (if it's in a DIL socket). ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [October 23, 2025, 5:03pm UTC](https://forum.arduino.cc/t/i-cant-upload-code-to-my-arduino-uno-r3/1375827/12 "2025-10-23T17:03:13Z")
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