Serial Exception Error While Uploading Code to ESP32-S3 WROOM-1

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1

Hi everyone,
I'm working on a project using the ESP32-S3 WROOM-1 module.
When I try to upload my code through the Arduino IDE, I get a Serial Exception error during upload.
I'm not sure how to fix it, and I really need to complete this project as soon as possible.

Could someone please help me troubleshoot this issue?
Thanks a lot in advance!

A serial exception error occurred: Cannot configure port, something went wrong. Original message: OSError(22, 'The I/O operation has been aborted because of either a thread exit or an application request.', None, 995)

2

I moved your topic to an appropriate forum category @deepakpragadeshwar.

In the future, when creating a topic please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.

This is an important part of responsible forum usage, as explained in the "How to get the best out of this forum" guide. The guide contains a lot of other useful information. Please read it.

Thanks in advance for your cooperation.

3

Hi. This typically means the serial connection is being interrupted by something, or it's not properly set up. You can try these steps:

1. Wrong/Busy COM Port

  • Check that the correct COM port is selected in Arduino IDE (Tools → Port).
  • Make sure nothing else (like another serial monitor, another Arduino IDE instance, or even some background software) is using that COM port.
  • Try disconnecting and reconnecting the ESP32-S3. See if the COM port changes.

Tip: Open Device Manager (Windows) and watch the "Ports (COM & LPT)" section when you plug and unplug the ESP32-S3 — it should appear and disappear.

2. Bad USB Cable

  • Not all USB cables are made for data! Some are charging-only cables.
  • Try a different data-capable USB cable, ideally short and good quality.

3. Driver Issues

  • Since you're on ESP32-S3, the USB interface might need a proper driver.
    Usually, it uses either:
    • Silicon Labs CP210x drivers
    • CH340 drivers
    • Or, the ESP32-S3 has built-in USB-CDC directly (no converter).

Check if you need to install or update the driver:

4. ESP32-S3 Boot Mode

  • If your ESP32-S3 doesn't enter the correct flashing mode automatically, the upload can fail.
  • Try holding down the "BOOT" button on your ESP32-S3 board while clicking Upload in Arduino IDE, and only release it when you see "Connecting...".

5. Too High Upload Speed

  • Sometimes the default upload speed (e.g., 921600 baud) is too high for a flaky cable or noisy environment.
  • Lower the upload speed:
    • In Arduino IDE → Tools → Upload Speed, try setting it to 115200 instead of 921600.

6. USB Power Issues

  • Some computers (especially laptops via hubs) don't give enough power.
  • If possible, connect directly to a rear USB port (not a hub) or try a powered USB hub.
4

if you have a ESP32S3 with 2 USB plugs,
use the right one ( when WIFI antenna UP )
mine is labeled 'COM' the one what makes problems is called 'USB' ( label on the back )

but on an official board the sides are switched and the labels different
left is 'UART' right is 'USB'
pls use UART

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5

You are correct. When i plug my data cable on left side it doesn't show that error. Thanks a lot.

2 Likes
6

The issue is resolved. Thanks for your help.

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