ESP32: Expose ext1 wakeup status

[daisylb]

Hello! I'm trying to build a battery-powered button panel that has four buttons on it, and comes out of sleep and does a bunch of network IO when one button is pressed.

At the moment I'm using esp32.wake_on_ext1 to get the machine to wake when one of the buttons is pressed, and then I'm just reading from the pins the buttons are wired to. Unfortunately a brief press on the button seems to take less time than MicroPython does to wake, so the pin is no longer high at that point.

The ESP-IDF has a function esp_sleep_get_ext1_wakeup_status which returns a bit mask of all the pins that triggered an EXT1 wake, which it looks like should do the trick—can this be added to the MicroPython esp32 module?

[brendenriggs]

Seconded. This is the only thing holding me back from using MP for my company's next project.

[karfas]

Is currently discussed in the forum: https://forum.micropython.org/viewtopic.php?f=18&t=11272
There they propose (and build) all kind of funny external devices to overcome this software limitation.

[hueyy]

See #7990