ESP32-S2 Mini: Error trying to compile and upload any code

Development Tools Uploading
1

Hi everyone,
I was coding in my ESP32S2 Mini and when I tried to compile and upload the code, it didn't work. The board reset but the code didn't run. Anyways the next message appeared in the console.

A serial exception error occurred: Cannot configure port, something went wrong. Original message: OSError(22, 'Se ha especificado un dispositivo que no existe.', None, 433) Note: This error originates from pySerial. It is likely not a problem with esptool, but with the hardware connection or drivers. For troubleshooting steps visit: https://docs.espressif.com/projects/esptool/en/latest/troubleshooting.html Wrote 878592 bytes (566877 compressed) at 0x00010000 in 18.7 seconds (376.8 kbit/s). Hash of data verified. Hard resetting with a watchdog... Failed uploading: uploading error: exit status 1

Do you know why this is happening?

I've tried a many things:

  • Using another board
  • Update the drivers to the last version
  • Compile and upload another code

In all the cases the same error came out, so I don't know what else I can do.

2

Hi @yumik0_chan. I'm going to ask you to provide the full verbose output from an upload attempt.

:red_exclamation_mark: This procedure is not intended to solve the problem. The purpose is to gather more information.

Please do this:

  1. Select File > Preferences... (or Arduino IDE > Settings... for macOS users) from the Arduino IDE menus.
    The "Preferences" dialog will open.
  2. Uncheck the box next to Show verbose output during: ☑ compile in the "Preferences" dialog.
  3. Check the box next to Show verbose output during: ☐ upload.
  4. Click the "OK" button.
    The "Preferences" dialog will close.
  5. Attempt an upload, as you did before.
  6. Wait for the upload to fail.
  7. You will see an "Upload error: ..." notification at the bottom right corner of the Arduino IDE window. Click the "COPY ERROR MESSAGES" button on that notification.
  8. Open a reply here on this forum topic by clicking the "Reply" button.
  9. 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.
    Code block icon on toolbar
    Code block icon on toolbar390×118 4.25 KB
  10. Press the Ctrl+V keyboard shortcut (Command+V for macOS users).
    This will paste the error output from the upload into the code block.
  11. Move the cursor outside of the code block markup before you add any additional text to your reply.
  12. Click the "Reply" button to publish the post.
3

Here is the full output of the fail upload

Sketch uses 955674 bytes (72%) of program storage space. Maximum is 1310720 bytes.
Global variables use 58080 bytes (17%) of dynamic memory, leaving 269600 bytes for local variables. Maximum is 327680 bytes.
"C:\Users\Usuario\AppData\Local\Arduino15\packages\esp32\tools\esptool_py\5.0.0/esptool.exe" --chip esp32s2 --port "COM3" --baud 921600  --before default-reset --after hard-reset write-flash  -z --flash-mode keep --flash-freq keep --flash-size keep 0x1000 "C:\Users\Usuario\AppData\Local\arduino\sketches\195667C389261BDD9FC9D9CE4A92C838/WebExplorer.ino.bootloader.bin" 0x8000 "C:\Users\Usuario\AppData\Local\arduino\sketches\195667C389261BDD9FC9D9CE4A92C838/WebExplorer.ino.partitions.bin" 0xe000 "C:\Users\Usuario\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.0/tools/partitions/boot_app0.bin" 0x10000 "C:\Users\Usuario\AppData\Local\arduino\sketches\195667C389261BDD9FC9D9CE4A92C838/WebExplorer.ino.bin" 
esptool v5.0.0
Serial port COM3:
Connecting...
A serial exception error occurred: Cannot configure port, something went wrong. Original message: OSError(22, 'Se ha especificado un dispositivo que no existe.', None, 433)

Note: This error originates from pySerial. It is likely not a problem with esptool, but with the hardware connection or drivers.
For troubleshooting steps visit: https://docs.espressif.com/projects/esptool/en/latest/troubleshooting.html
Failed uploading: uploading error: exit status 1
4

This error might be caused by having the wrong port selected from the Tools > Port menu in Arduino IDE.

Please perform this experiment to verify that the COM3 port you have selected is your Arduino board:

  1. Connect the Arduino board to your computer with a USB cable (if it is not already).
  2. Select Tools > Port from the Arduino IDE menus. If one of the ports in the menu is labeled as "ESP32 Family Device", that is the port of your Arduino board.

If you saw the port labeled with the board name in the Tools > Port menu, select that port and try uploading again.

If this doesn't solve the problem, please reply here on this forum topic with the answers to the following questions:

  • While following those instructions, did you see a port in the Tools > Port menu that was labeled with the board name?
  • If you did see a labeled port, was the upload successful after you selected that port?

The reason I'm suspicious about the port is because the output you shared in post #1 showed that the upload had actually completed:

But the output you shared in post #3 showed that the attempt to connect to the board via the serial port completely failed.

5

The only port that is accesible is the COM3 that is the ESP32S2 Dev Module, and I don't have more ports availables.

Here is the configuration that i'm using:

imagen_2025-09-05_212503293
imagen_2025-09-05_2125032931089×841 48 KB

6

OK, great. That proves that COM3 is indeed the correct port. I was wrong about the "ESP32 Family Device" part. The other native USB ESP32 chips are labeled that way, but they are actually able to give the ESP32-S2 chip a more specific label due to the fact that, unlike the other chips, it apparently has a unique identifier.

Anyway, I can see from your screenshot that the most recent upload you did produced different output than the output you shared in post #3. Please follow the instructions I provided in post #2 once again so that we can see the output that is being produced now.

7

Here is the last error

Sketch uses 955674 bytes (72%) of program storage space. Maximum is 1310720 bytes.
Global variables use 58080 bytes (17%) of dynamic memory, leaving 269600 bytes for local variables. Maximum is 327680 bytes.
"C:\Users\Usuario\AppData\Local\Arduino15\packages\esp32\tools\esptool_py\5.0.0/esptool.exe" --chip esp32s2 --port "COM3" --baud 921600  --before default-reset --after hard-reset write-flash  -z --flash-mode keep --flash-freq keep --flash-size keep 0x1000 "C:\Users\Usuario\AppData\Local\arduino\sketches\195667C389261BDD9FC9D9CE4A92C838/WebExplorer.ino.bootloader.bin" 0x8000 "C:\Users\Usuario\AppData\Local\arduino\sketches\195667C389261BDD9FC9D9CE4A92C838/WebExplorer.ino.partitions.bin" 0xe000 "C:\Users\Usuario\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.0/tools/partitions/boot_app0.bin" 0x10000 "C:\Users\Usuario\AppData\Local\arduino\sketches\195667C389261BDD9FC9D9CE4A92C838/WebExplorer.ino.bin" 
esptool v5.0.0
Serial port COM3:
Connecting...
Connected to ESP32-S2 on COM3:
Chip type:          ESP32-S2FNR2 (revision v0.0)
Features:           Wi-Fi, Single Core, 240MHz, Embedded Flash 4MB, Embedded PSRAM 2MB, ADC and temperature sensor calibration in BLK2 of eFuse V2
Crystal frequency:  40MHz
USB mode:           USB-OTG
MAC:                48:27:e2:51:2e:bc

Uploading stub flasher...
Running stub flasher...
Stub flasher running.
Changing baud rate to 921600...
Changed.

Configuring flash size...
Flash will be erased from 0x00001000 to 0x00006fff...
Flash will be erased from 0x00008000 to 0x00008fff...
Flash will be erased from 0x0000e000 to 0x0000ffff...
Flash will be erased from 0x00010000 to 0x000f9fff...
Compressed 21184 bytes to 13584...

Writing at 0x00001000 [                              ]   0.0% 0/13584 bytes... 

Writing at 0x000022a3 [===>                          ]  15.1% 2048/13584 bytes... 

Writing at 0x00002df8 [========>                     ]  30.2% 4096/13584 bytes... 

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Writing at 0x00005ab4 [==========================>   ]  90.5% 12288/13584 bytes... 

Writing at 0x000062c0 [==============================] 100.0% 13584/13584 bytes... 
Wrote 21184 bytes (13584 compressed) at 0x00001000 in 0.5 seconds (350.6 kbit/s).
Hash of data verified.
Compressed 3072 bytes to 146...

Writing at 0x00008000 [                              ]   0.0% 0/146 bytes... 

Writing at 0x00008c00 [==============================] 100.0% 146/146 bytes... 
Wrote 3072 bytes (146 compressed) at 0x00008000 in 0.1 seconds (220.7 kbit/s).
Hash of data verified.
Compressed 8192 bytes to 47...

Writing at 0x0000e000 [                              ]   0.0% 0/47 bytes... 

Writing at 0x00010000 [==============================] 100.0% 47/47 bytes... 
Wrote 8192 bytes (47 compressed) at 0x0000e000 in 0.1 seconds (501.7 kbit/s).
Hash of data verified.
Compressed 955824 bytes to 611807...

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A serial exception error occurred: Cannot configure port, something went wrong. Original message: OSError(22, 'Se ha especificado un dispositivo que no existe.', None, 433)
Note: This error originates from pySerial. It is likely not a problem with esptool, but with the hardware connection or drivers.
For troubleshooting steps visit: https://docs.espressif.com/projects/esptool/en/latest/troubleshooting.html
Wrote 955824 bytes (611807 compressed) at 0x00010000 in 20.3 seconds (377.5 kbit/s).
Hash of data verified.

Hard resetting with a watchdog...
Failed uploading: uploading error: exit status 1
8

I had a similar problem but it was with a seed studio XIAO s3 board.
i had to completely remove the device drivers, and retry again. Some of these in addition to the device driver, you have to download the driver for the specific chip used to interface to the COM port. you can find the tiny little chip with a magnifying glass to be sure you have the correct driver.
Finally sometimes mine would boot sometimes not. Adding a 0.1uF capacitor on the power feed solved that.
I hope that this helps you in some way.
Finally i have had zero troubles from boards from Freenove boards, and even better ones from Espressif. you can buy the Espressif ones on digikey at a reasonable price

9

I also tried to remove the drivers but nothing happend. Also, I tried to upgrade the drivers but it says that the drivers are in the earliest version.

10

OK, great. In this output the upload was successful. It seems the "OSError(22, 'Se ha especificado un dispositivo que no existe.', None, 433)" error message is either spurious, or is caused by something that does not impact the upload.

I did see a report about the spurious message here:

However, the claim there was that the bug was fixed in version 5.0.0 of the esptool tool that is used to upload sketches to the ESP32 boards, yet you are still encountering it even though version 5.0.0 is in use:

So I'm not sure what is going on. But I also suspect it is not related to the other problem you reported:

So I suggest we shift our focus to trying to troubleshoot that "code didn't run" problem. If we can solve the "code didn't run" problem, then you can simply ignore the spurious "OSError(22, 'Se ha especificado un dispositivo que no existe.', None, 433)" error message and carry on with your Arduino projects.

Please provide a detailed description of what led you to the conclusion that the code is not running on the board.

Make sure to include the following information:

  • What did you do?
  • What were the results you expected from doing that thing?
  • What were the results you observed that did not match your expectations?
11

I was programming a Web server on the ESP32. So, when I connect the ESP32 it suposse to expose a Wifi signal that you can be able to connect, once you are connect to that signal you can go to and specific rute, were you can find a web for upload and download .txt files.

The code don't seem to have any problem. About the board, there is a light when I connect it (when it works properly), in this case no light is visible.

12

I can tell you also that code from ESP32 classic is not completely compatible with the S2, and the S3 even.
For instance to use SPI bus on the S3 you must enable FSPI otherwise the chip will not boot. It will compile but the LEDS wont light up.
Espressifs website can get you on track im sure of that

13

I don't think that the problem is the connection, I can compile and upload code in the Esp32S2 outside the Arduino IDE, (using a website). Both boards worked with that way, but using the IDE no, so I think that it's a wrong configuration in the arduino ide.

14

Perhaps it is only the error message that is wrong? It looks like the program was 100% loaded. Does it run if you press the reset button?