QUERY · ISSUE

ESP32: RTC no function 'wake_on_ext0'

openby linuskohleropened 2018-09-15updated 2019-05-21

port-esp32

Hello,
this question may already be answered, but I can't find any working version for me.

I'm trying to use an interrupt-Pin on my newly flashed ESP32.
I tried with multiple snippets I found online (e.g. this or this), but it always breaks down to the point that RTC doesn't have the attribute now() or wake_on_ext0.

AttributeError: 'RTC' object has no attribute 'wake_on_ext0'

Is there anything I'm doing wrong? I'm using a flashed ESP32 wroom and the latest binaries from here (esp32-20180915-v1.9.4-528-gabb536da4.bin).

Thanks for your help!

CANDIDATE · ISSUE

ESP32 RTC_VALID_EXT_PINS not valid for ESP32 S2/S3

closedby stephanelsmithopened 2021-08-02updated 2022-04-14

port-esp32

modesp32.h defines the valid RTC_VALID_EXT_PINS suitable for Pico D4. S2 has a different pinout.

For example, pin 10 is not valid on Pico D4 (Flash memory), but is a valid RTC pin on S2. If I'm not mistaken, I believe this should work on S2, but getting 'invalid pin' error.

o = Pin(10, Pin.IN, pull=Pin.PULL_UP)
esp32.wake_on_ext0(pin = o, level = esp32.WAKEUP_ALL_LOW) #single pin

Thank you!

Assessment

Q Qwen · high

Both issues concern ESP32 RTC wake_on_ext0 functionality, but they address different problems. Issue #4142 reports that the wake_on_ext0 method is completely missing from the RTC object (AttributeError: 'RTC' object has no attribute 'wake_on_ext0'), suggesting the feature wasn't implemented or exposed in that version. Issue #7607 reports that wake_on_ext0 exists but has incorrect pin validation logic (RTC_VALID_EXT_PINS hardcoded for Pico D4) that rejects valid pins on S2/S3 variants. The root causes are different: one is about feature availability/exposure, the other is about pin validation logic. Issue #7607 does not resolve the missing method problem in #4142.

Suggested action

Keep both issues open as they address distinct problems. #4142 may need feature implementation or API exposure, while #7607 needs pin validation logic updates for different ESP32 variants.

ESP32: RTC no function 'wake_on_ext0'

ESP32 RTC_VALID_EXT_PINS not valid for ESP32 S2/S3

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