Access Denied when uploading to Arduino Nano

Official Hardware Nano Family Classic Nano
1

I've searched everywhere to try and find an answer and cannot find an answer to my problem. Whenever I try to upload to my Arduino Nano I get this error message:


Sketch uses 4354 bytes (14%) of program storage space. Maximum is 30720 bytes.
Global variables use 482 bytes (23%) of dynamic memory, leaving 1566 bytes for local variables. Maximum is 2048 bytes.
"C:\Users\cjda4\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/bin/avrdude" "-CC:\Users\cjda4\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf" -v -V -patmega328p -carduino "-PCOM30" -b115200 -D "-Uflash:w:C:\Users\cjda4\AppData\Local\Temp\arduino\sketches\DE7EBFF01D5888E87731BB5519125118/ArduinoISP.ino.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\cjda4\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"

         Using Port                    : COM30
         Using Programmer              : arduino
         Overriding Baud Rate          : 115200
avrdude: ser_open(): can't open device "\\.\COM30": Access is denied.



avrdude done.  Thank you.

Failed uploading: uploading error: exit status 1

I simply do not know how to fix this and have tried to burn the bootloader, change the name of the port, and reset the IDE, Nano and computer.

2

You are not alone. I believe you will need to get the appropriate driver. I am a Linux person and that was not a problem for me. I have seen many instances of similar questions with the driver being the answer.

3

Try this:

1 Like
4

So I've tried to update the driver but the thing is, the chip that the driver is referring to is not on my Nano. For more information, my Nano is an Inland brand Nano and the chip on the bottom has the following text:

EFTDI
2238-B
U43L8C00
FT232RNL
5

This is FTDI chip next generation of FT232RL. If it does not work, try to download the driver directly from their page.

6

So I found the driver here and have installed it but when I upload it still gives me the error. I restarted my computer to see if that would fix anything and it still gives me the error. Am I installing the driver incorrectly?

7

That error usually indicates that some other software on your computer is using COM30.
Also, it' unusual to have a com port number that high on windows unless something is using or has used everything lower

8

Hi @ravenrain44 There is a known bug in Arduino IDE 2.x that can cause uploads to fail with this "Access is denied" error if you try uploading to certain boards while Serial Monitor or Serial Plotter is open. A port can only be used by one process at a time, so Arduino IDE automatically closes the port in Serial Monitor and Serial Plotter during an upload, automatically opening it again after. For some reason, that juggling of the port control is not working for certain boards.

If that bug is the cause of the problem you are having, the workaround will be to manually close the port in Serial Monitor/Serial Plotter before doing an upload. Please give that a try and then let me know if you still have the error while uploading:

Serial Monitor

  1. Click the X icon on the "Serial Monitor" tab in the bottom panel of the Arduino IDE window to close the tab:
    image
  2. Upload the sketch.
  3. Open Serial Monitor again if needed (by clicking the icon on the IDE toolbar or the Tools > Serial Monitor menu item) after the upload is finished.

Serial Plotter

If you have the "Serial Plotter" window open, the procedure is a bit different from closing the Serial Monitor connection:

  1. Close the "Serial Plotter" window.
  2. If the "Serial Monitor" view is not already open, select Tools > Serial Monitor from the Arduino IDE menus to open it.
    ⓘ We must do an open/close cycle on Serial Monitor as a workaround for a bug in Serial Plotter
  3. Click the X icon on the "Serial Monitor" tab in the bottom panel of the Arduino IDE window to close the tab:
    image
  4. Upload the sketch.
  5. Open Serial Monitor and/or Serial Plotter again if needed after the upload is finished.

Please let me know if you have any questions or problems while following those instructions.

1 Like
9

You are absolutely amazing. Thank you so much.

10

You are welcome. I'm glad if I was able to be of assistance.

Regards,
Per

11

Hi, first post, I'm glad I finally found this solution, three days wasted after buying a genuine Arduino Nano, and yes it has an FTDI VCP chip.
The Serial Monitor was the issue, I have not used the Serial Plotter.
Windows 10, fully updated. Arduino IDE 2.1.0. now waiting for IDE update
Cheers (at last)
Fred

12

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