Supply voltage range is 2.3-3.6V, same as for D0WD.


I think you should test the chip esp32 d2wd , when you supply the voltage over 3.3v the chip will reset reset and reset.


i think there is a big missunderstood here.

first:

the D2WD works very well in the supply 2.3 - 3.6V itself.

BUT ...

ESP32-D2WD can not download,the situation I've met too recently.
GPIO0 is pulled down,and GPIO12/MTDI is pulled high,the voltage of pin VDD_SDIO is 1.8V.
The system power is 3.3V and the clock is 40MHz，all the conditions is satisfied,but still can't download bin to the flash which is embedded the ...