Another odd S3 related issue. In S2 (and previous versions), I have no problem with pin irqs. In S3, the IRQ handler seems to not be called.

• I've tried a variety of the RTC pins (GPIO0 - GPIO21)
• Tried different pull options
• I am able to read the correct logic level using pin.value()
• I have a variety of different boards I've tested (and pins) and seeming consistency in S3 specific issue.

from machine import Pin
p = Pin(5, Pin.IN, pull=Pin.PULL_DOWN)
p.irq(lambda pin:print(pin))

I have no problem on ESP32-S2 as tested on:

• UM FeatherS2
• UM TinyS2

On S3, seeing the issues on:

• ESP official S3 dev kit
• UM ProS3
• My custom S3 board

My gut feel would be this would be related to pin definition for RTC pins in machine_pin.c. I don't see anything popping out at me, though eyes aren't properly calibrated here.