Flash new application in ESP32 using another microcontroller

[c.Hicham]

Hello,

I'm designing a custom board with an esp32 Soc on it and I want to be able to update the esp32 firmware using a host microcontroller available in the board.
I can't find any examples of this so I'm wondering what pins should I connect to my host microcontroller!
I know that at least pins CHIP_PU(9) and IO(23) and maybe SPI or UART pins ?
Is there any example out there to use as reference ? otherwise any help would be very useful for me

Thank you.

[WiFive]

https://github.com/espressif/esp-serial-flasher
https://github.com/espressif/esptool#serial-connections
https://github.com/espressif/esptool/wi ... -Selection

[c.Hicham]

https://github.com/espressif/esp-serial-flasher
https://github.com/espressif/esptool#serial-connections
https://github.com/espressif/esptool/wi ... -Selection

That's perfect. I guess I was lazy :p

Thank you very much