ESP32 Forum

Hello
I have a download problem with a ESP32 WROOM. l connects well but seems not to detect FLASH. Here is the error message.
I check everything, change the ESP but still the same.
Do you have an idea.
thank you in advance

Archiving built core (caching) in: C:\Users\Luc\AppData\Local\Temp\arduino_cache_916759\core\core_espressif_esp32_esp32_FlashMode_qio,FlashFreq_80,FlashSize_4M,UploadSpeed_921600,DebugLevel_none_3e5d3f9bb53412721363cb0cb542074b.a
Le croquis utilise 154674 octets (11%) de l'espace de stockage de programmes. Le maximum est de 1310720 octets.
Les variables globales utilisent 10832 octets (3%) de mémoire dynamique, ce qui laisse 284080 octets pour les variables locales. Le maximum est de 294912 octets.
esptool.py v2.1
Connecting........_
Chip is ESP32D0WDQ6 (revision 1)
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Configuring flash size...
Warning: Could not auto-detect Flash size (FlashID=0xffffff, SizeID=0xff), defaulting to 4MB
Compressed 8192 bytes to 47...

A fatal error occurred: Timed out waiting for packet content
A fatal error occurred: Timed out waiting for packet content

Hi Beroy,

What hardware (development board, etc) is connected to the WROOM? Is it possible something is connected to the SPI flash GPIOs of the WROOM module (GPIOs 6-11 inclusive)?

Hello and thank you for your answer.
No nothing is connected to GPIO6-> GPIO11.
see diagram. I do not know what to do anymore.
Thanks for your help

Here is the part to lower the code.
And here is what I have as a message on the COM port (normal mode):
rst: 0x1 (POWERON_RESET), boot: 0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ands Jun 8 2016 00:22:57

rst: 0x10 (RTCWDT_RTC_RESET), boot: 0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ands Jun 8 2016 00:22:57
.
.
.

If there are no shorts or other assembly/soldering problems on those same pins on the board then it's possible your WROOM has a faulty flash chip.

boot: 0x33 (SPI_FAST_FLASH_BOOT)

This means gpio12 is pulled high at boot (1-wire/i2c pull-up) selecting 1.8v flash voltage which is not correct for wroom32. Gpio12 should be pulled low at boot.

THANK YOU MUCH, you're right.
I am really stupid because I had read that on the datasheet but I had not made the connection between MTDI and GPIO12.
Everything is working properly!

even am getting the same problem, what is the solution for that.

As WiFive said, Gpio12 must be pulled down at startup.