5 replies

I need a circuit to download the firmware inside esp32 and the pin used.

Hi
I need a circuit to download the firmware inside esp32 and the pin used.

Solution

To automate firmware downloads on your

ESP32

ESP32

using an

FTDI

FTDI

module, connect the

FTDI's

FTDI's

DTR

DTR

to the

ESP32's

ESP32's

EN (Enable)

EN (Enable)

pin, and

RTS

RTS

GPIO0 (BOOT)

GPIO0 (BOOT)

, each through a

0.1 µF

0.1 µF

capacitor. This setup allows the flashing tool to automatically reset the

ESP32

ESP32

and enter flash mode without any manual button presses.