I am writing to seek assistance regarding an issue I am facing with my Arduino UNO.
Upon attempting to program the UNO, I encountered the following error message:
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xa1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0xa1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0xa1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0xa1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0xa1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0xa1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0xa1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0xa1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0xa1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0xa1
Failed uploading: uploading error: exit status 1
I have attempted several troubleshooting steps, such as checking the connections, restarting the Arduino IDE, and ensuring the correct port and board are selected. However, the issue persists.
I appreciate your prompt response. I conducted the experiment as instructed, but unfortunately, the "L" LED did not blink after I released the "RESET" button. Regrettably, the issue persists.
If there are additional steps or troubleshooting measures you'd like me to take, please provide guidance. I'm eager to assist in resolving this matter.
This result tells us that one of the following two things is happening:
The microcontroller on the board is not running.
The bootloader (a program stored in a special area of memory in the microcontroller that handles sketch uploads) was somehow erased or corrupted.
It is possible for a short or external circuitry connected to the Arduino board to prevent the primary microcontroller from running.
Make sure the board is not sitting on anything conductive that could short the contacts on the bottom of the board. Make sure there isn't any conductive debris (e.g., strands of wire or component leads) on the board or on the surface the board is sitting on.
If you have a shield or any external circuitry or components connected to your Arduino board, try this experiment:
Disconnect the USB cable of the Arduino board from your computer.
Disconnect any shields, modules, external circuitry, etc. from your board.
Connect the Arduino board to your computer with a USB cable.
Now try uploading a sketch to the board again. Does the upload succeed?
This experiment will determine whether the upload error was caused by a problem in the external circuitry. If so, you can then focus your attention on identifying the specific problem with the circuit and resolving it.
Thank you for your detailed explanation and guidance. I appreciate your assistance in troubleshooting this issue. I've followed the steps you provided, and here are the results:
I disconnected the USB cable from the Arduino board.
I removed all shields, modules, and external circuitry from the board.
I then reconnected the Arduino board to my computer using the USB cable.
Upon attempting to upload a sketch, I encountered the same issue – the upload did not succeed.
It seems that the problem persists even after eliminating external factors. If there are any additional steps or tests you'd like me to perform, please let me know. I'm eager to resolve this issue and appreciate your continued support.
Did upload succeed in the past? What was the project that you were working on when it started to fail?
I know that you don't want to hear this but you need to keep in mind that electronics is not very forgiving for mistakes that you make.
If you have a multimeter, I suggest that you check the 5V and 3.3V outputs. Do this with only the board connected to the PC. After that you can do the same with only an external power supply (if you have one).
Note that there might be more damage to your board than just the 328P.
How is your Uno identified by the operating system? As an Arduino Uno or as something else? If it is identified as an Arduino Uno or some FTDI, you can run the loopback test. If that test fails you know that there is more damage than just the 328P. The loopback test is not conclusive if your board uses the CH340 serial-to-usb converter !!
If the loopback test succeeds and your Uno has the DIP 328P, you can buy a replacement 328P and try that; make sure that you buy one that comes with the bootloader (optiboot) preloaded so you don't have to do that yourself.
I wanted to update you on the Arduino UNO programming issue I mentioned earlier. I'm pleased to report that I have successfully resolved the problem by burning the bootloader using another Arduino.
Hi @mzeidan28. I'm going to ask you to post the full verbose output from an upload attempt.
This procedure is not intended to solve the problem. The purpose is to gather more information.
Please do this:
Select File > Preferences... (or Arduino IDE > Settings... for macOS users) from the Arduino IDE menus.
The "Preferences" dialog will open.
Uncheck the box next to Show verbose output during: ☑ compilation in the "Preferences" dialog.
Check the box next to Show verbose output during: ☐ upload.
Click the "OK" button.
Attempt an upload, as you did before.
Wait for the upload to fail.
You will see a "Upload error: ..." notification at the bottom right corner of the Arduino IDE window. Click the "COPY ERROR MESSAGES" button on that notification.
Open a forum reply here by clicking the "Reply" button.
Click the <CODE/> icon on the post composer toolbar.
This will add the forum's code block markup (```) to your reply to make sure the error messages are correctly formatted.
Press the Ctrl+V keyboard shortcut (Command+V for macOS users).
This will paste the error output from the upload into the code block.
Move the cursor outside of the code block markup before you add any additional text to your reply.
This procedure is not intended to solve the problem. The purpose is to gather more information.