Aaaaah, okay, it disables it entirely; the wording in the original post ('ESP32 is unable to service both interrupts at a time (simultaneously)') made me think there was something wrong at runtime only when both interrupts were triggered. In that case, I think the issue is that gpio_install_isr_serv...

What do you mean, 'doubt of performance'? What performance are you worried about?

Hm, I'm not seeing anything obviously wrong with that code... Can you tell me what problems specifically you see, that is, how do you notice specifically that the ADC interrupt isn't serviced (and how did you conclude it's the ADC interrupt and not something else in the chain that malfunctions) and ...

Something's wrong with communication with the flash chip. Check pin 17-22 on the module, see if those aren't accidentally bridged or shorted to something.

Heh, you're welcome, glad you got it working.

Yes, I2S can do 16 or even 32-bit buses.

That sounds odd... do you have a minimal example that shows this, or at least more information (how long is the ADC code delayed, for instance)?

It works if you set it in code as a struct member: It does not work in a named initializer:

My wiring is functioning properly

Just curious: what makes you so sure about that?

Your code will automatically update ota_0 if it's running from ota_1 (or factory) and ota_1 if it's running from ota_0; the call to esp_ota_get_next_update_partition will give you the correct partition to update. Returning to factory is something done in the bootloader; I think there's a Menuconfig ...