Comments on: ESP32 Troubleshooting Guide

By: Sven Andreas

Sven Andreas — Mon, 01 Sep 2025 05:47:00 +0000

i had a hard time to figure out all the different ways oof fixing Wifi , finally see the github gist , just put your ssid and password in and watch the serial monitor for output to fix it in your environment …. gist.github.com/dx111ge/c6293d13a8c2132e4b1bdd5a69e59df5

By: Erich

Erich — Mon, 04 Aug 2025 16:08:44 +0000

In reply to Sara Santos.

Hi Sara,
I’ve tried various boards, and I’ve currently chosen the ESP32 Dev Module.
Regards,
Erich

By: Sara Santos

Sara Santos — Mon, 04 Aug 2025 15:54:03 +0000

In reply to Erich.

Hi.
That’s weird.
What board are you selecting?
Maybe you need to select a more generic board? Like ESP32 dev module?

Regards,
Sara

By: Erich

Erich — Mon, 04 Aug 2025 14:34:31 +0000

In reply to Sara Santos.

Regarding my upload problem:
I followed your suggestion to uninstall everything (Arduino IDE, VS Code), delete all folders, and reinstall everything.
I installed Arduino IDE V2.3.6.
I installed ESP32 V3.3.0 Espressif.
I get the error message again when uploading.

I have now changed the ESP32 version to the previous version ESP32 3.2.1 Espessif and I can upload without problems with this version

Maybe the board is no longer supported in the new version ?

I also reinstalled VS Code with PIOArduino, and I can upload without problems with this version .
How can I check which version of ESP32 is used by PIOArduino?

***** Terminal Message******
** ESP32 V3.3.0 **
“C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\tools\esptool_py\5.0.0/esptool.exe” –chip esp32 –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\Erich\AppData\Local\arduino\sketches\A639A26605A852C9FF1B5ECDDFC4A630/Blink.ino.bootloader.bin” 0x8000 “C:\Users\Erich\AppData\Local\arduino\sketches\A639A26605A852C9FF1B5ECDDFC4A630/Blink.ino.partitions.bin” 0xe000 “C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.0/tools/partitions/boot_app0.bin” 0x10000 “C:\Users\Erich\AppData\Local\arduino\sketches\A639A26605A852C9FF1B5ECDDFC4A630/Blink.ino.bin”
esptool v5.0.0
Serial port COM3:
Connecting……
A fatal error occurred: Invalid head of packet (0x07): Possible serial noise or corruption.

** ESP32 V3.2.1 **
“C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\tools\esptool_py\5.0.dev1/esptool.exe” –chip esp32 –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\Erich\AppData\Local\arduino\sketches\A639A26605A852C9FF1B5ECDDFC4A630/Blink.ino.bootloader.bin” 0x8000 “C:\Users\Erich\AppData\Local\arduino\sketches\A639A26605A852C9FF1B5ECDDFC4A630/Blink.ino.partitions.bin” 0xe000 “C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.2.1/tools/partitions/boot_app0.bin” 0x10000 “C:\Users\Erich\AppData\Local\arduino\sketches\A639A26605A852C9FF1B5ECDDFC4A630/Blink.ino.bin”
esptool.py v4.8.1
Serial port COM3:
Connecting….
Connected to ESP32 on COM3:
Chip type: ESP32-D0WDQ6 (revision v1.0)

** VS Code **
Configuring upload protocol…
AVAILABLE: cmsis-dap, esp-bridge, esp-prog, espota, esptool, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa
CURRENT: upload_protocol = esptool
Looking for upload port…
Auto-detected: COM3
Uploading .pio\build\esp32dev\firmware.bin
esptool v5.0.2
Serial port COM3:
Connecting……
Connected to ESP32 on COM3:
Chip type: ESP32-D0WDQ6 (revision v1.0)

By: Sara Santos

Sara Santos — Thu, 31 Jul 2025 17:56:36 +0000

In reply to Erich.

Hi.
Unfortuantelu, I’m not sure what might have happened.
You probably have older versions installed that are causing incompatibility.

I recommend unninstalling VS Code, platformio and pioarduino. Remove any folders from your computer related to them.
Then, start installing everything from the start.

The same for the Arduino IDE.

Regards,
Sara

By: Erich

Erich — Thu, 31 Jul 2025 15:54:16 +0000

Hello,
I switched my VS Code with platformIO to PiOarduino. Some updates were installed, but now I can no longer upload to my ESP32 dev board. The connection always fails with an error message. the changeover back to platformIO didn’t make a difference. I’m also having the same problem in Arduino IDE V2.3.7. The COM port is fine, as I can exchange data on the monitor.
I connected the board to another PC with Arduino IDE 1.8.19, and the upload worked without any problems.
I compared the upload requests and noticed that different flash addresses are listed for the same board. That can’t be right!

** Arduino 1.8.19 Works **
C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\tools\esptool_py\3.0.0/esptool.exe –chip esp32 –port COM3 –baud 921600 –before default_reset –after hard_reset write_flash -z –flash_mode dio –flash_freq 80m –flash_size detect 0xe000 C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.6/tools/partitions/boot_app0.bin 0x1000 C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.6/tools/sdk/bin/bootloader_qio_80m.bin 0x10000 C:\Users\Erich\AppData\Local\Temp\arduino_build_139698/Blink.ino.bin 0x8000 C:\Users\Erich\AppData\Local\Temp\arduino_build_139698/Blink.ino.partitions.bin

For better reading:
“C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\tools\esptool_py\3.0.0/esptool.exe”
–chip esp32
–port “COM3”
–baud 921600
–before default_reset
–after hard_reset write_flash -z
–flash_mode dio
–flash_freq 80m
–flash_size detect 0xe000
“C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.6/tools/partitions/boot_app0.bin” 0x1000
“C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.6/tools/sdk/bin/bootloader_qio_80m.bin” 0x10000
“C:Users\Erich\AppData\Local\Temp\arduino\sketches\D848C5F109ABF96DADA1F7CF94F32C47/Blink.ino.bin” 0x8000
“C:Users\Erich\AppData\Local\Temp\arduino\sketches\D848C5F109ABF96DADA1F7CF94F32C47/Blink.ino.partitions.bin”

** Arduino 2.3.7 Error message **
C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\tools\esptool_py\5.0.0/esptool.exe –chip esp32 –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\Erich\AppData\Local\Temp\arduino_build_967082/Blink.ino.bootloader.bin 0x8000
C:\Users\Erich\AppData\Local\Temp\arduino_build_967082/Blink.ino.partitions.bin 0xe000
C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.0/tools/partitions/boot_app0.bin 0x10000 C:\Users\Erich\AppData\Local\Temp\arduino_build_967082/Blink.ino.bin

For better reading:
C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\tools\esptool_py\5.0.0/esptool.exe
–chip esp32
–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\Erich\AppData\Local\Temp\arduino_build_967082/Blink.ino.bootloader.bin 0x8000
C:\Users\Erich\AppData\Local\Temp\arduino_build_967082/Blink.ino.partitions.bin 0xe000

terminal message during upload:
C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.0/tools/partitions/boot_app0.bin 0x10000
C:\Users\Erich\AppData\Local\Temp\arduino_build_967082/Blink.ino.bin
“C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\tools\esptool_py\5.0.0/esptool.exe” –chip esp32 –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\Erich\AppData\Local\arduino\sketches\A639A26605A852C9FF1B5ECDDFC4A630/Blink.ino.bootloader.bin” 0x8000
“C:\Users\Erich\AppData\Local\arduino\sketches\A639A26605A852C9FF1B5ECDDFC4A630/Blink.ino.partitions.bin” 0xe000
“C:\Users\Erich\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.0/tools/partitions/boot_app0.bin” 0x10000
“C:\Users\Erich\AppData\Local\arduino\sketches\A639A26605A852C9FF1B5ECDDFC4A630/Blink.ino.bin”
esptool v5.0.0
Serial port COM3:
Connecting….
A fatal error occurred: Invalid head of packet (0x08): Possible serial noise or corruption.

Fehlgeschlagenes Hochladen: Hochladefehler: exit status 2

can someone help
greetings
Erich

By: Sara Santos

Sara Santos — Wed, 30 Jul 2025 15:58:43 +0000

In reply to Sushil Tamang.

Hi
Check bullet number 4 and 6
Regards,
Sara

By: Sushil Tamang

Sushil Tamang — Wed, 30 Jul 2025 08:30:06 +0000

A fatal error occurred: Failed to connect to ESP32: No serial data received.
For troubleshooting steps visit: docs.espressif.com/projects/esptool/en/latest/troubleshooting.html

Failed uploading: uploading error: exit status 2 // this error comes in esp 32 cam module it doesnot upload . every time i tried to upload this every times it shows this error so please heartly check this error

By: Sara Santos

Sara Santos — Tue, 01 Jul 2025 09:23:46 +0000

In reply to Amos Smith.

Great.
Thanks for your feedback.
Regards,
Sara

By: Amos Smith

Amos Smith — Tue, 01 Jul 2025 04:18:46 +0000

Hi Everyone,

This debug tool is useful in finding my coding error/s or helping figure out what the problem is:
github.com/me-no-dev/EspExceptionDecoder?tab=readme-ov-file

Also, I found this useful online resource for visualising your HTML and CSS code OR someone else’s:
.w3schools.com/html/tryit.asp?filename=tryhtml_intro
And this for learning HTML and CSS coding:
w3schools.com

I purchased your books to say THANK YOU and help keep you going 🙂
Kind Regards
Amos