ESP32 Forum

I bought a board esp32
Esptool.py flash_id

Erial port /dev/cu.SLAB_USBtoUART
Connecting........__
Detecting chip type... ESP32
Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core, 160MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 30: ae: a4: c0: 67: 60
Uploading stub...
Running stub...
Stub running...
Manufacturer: 20
Device: 4016
Detected flash size: 4MB
Hard resetting via RTS pin...


Why does it show 160Mhz I use 240Mhz it always keeps restarting

There are versions of the ESP32 which are only certified to work at 160MHz. Seems your development board has one of those chips.

ESP_Sprite wrote: ↑

Sat Sep 14, 2019 7:40 am

There are versions of the ESP32 which are only certified to work at 160MHz. Seems your development board has one of those chips.

datasheet wrote:Among the ESP32 series of SoCs, ESP32-D0WDQ6 and ESP32-D0WD have a maximum CPU frequency of 240MHz, ESP32-D2WD and ESP32-S0WD have a maximum CPU frequency of 160 MHz.

There are downrated versions of DOWDQ6? Are they marked differently or just efused after testing?

my board

Downrated modules too?!

Okay, I ran this past the guys responsible for this. They say that while we have 160MHz parts, we have been very conservative on selling them, and as far as they are aware, none of them have ended up on the public market for inclusion on e.g. modules; if you buy a devboard or module, you can assume it can go to 240MHz. Strangely, this includes this module: we ran the MAC past the production database, and the ESP32 associated with it is both qualified for and sold as a 240MHz part. Yanite123: did you perhaps try to do something with the fuses? Any chance you can run the 'dump' and/or 'summary' command of espefuse.py and post the results here?

Hi Yanite123,

Did you perhaps try to do something with the fuses? Any chance you can run the 'dump' and/or 'summary' command of espefuse.py and post the results here? Thanks.

Alvin