Activating STM32's bootloader

[yrashk]

Hi again :)

I am trying to figure out STM32 bootloader activation. Following the information found in datasheets, I was trying to press the button on the front panel when powering up esp32MX-E to set BOOT0 (as per both your instructions and datasheets). However when I am trying to communicate to it over I2C, it's timing out.

I suspect that I might not be doing the bootloader activation correctly, however I am not sure if there's any good way to test if it was indeed activated. Do you have any thoughts on whether it'd be possible for ESP32 program to check if STM32 is indeed in the bootloader (system memory) mode?