Unfortunately no, this is a public event, so the user would have a implicit requirement to delete the data, or there could be an instance where there are multiple event handlers that are going to use this data, so neither of them can delete it as they don't know when it is 'safe' to do so. So yes, ...

Are you sure it's a stack overflow? You can try increasing the task stack size, or share the code here if you think it shouldn't be happening.

Check those allocs. If you want enough memory for 4096 floats, you'll need 4096 * sizeof(float).

More GPIO, and slightly increased pitch.

I have an example here now: https://github.com/boarchuz/HULP/blob/master/examples/GPIO_Wakeup/main.cpp I was having trouble with the ULP running at the wrong speed (150 kHz) and everything powering down when the stub ended (killing the ULP in the middle of its program), but simply keeping the ULP sl...

You're right about ESP32 ULP, but ESP32-S2 does add GPIO wakeup to ULP (though I don't think it's implemented yet). A reasonably high wakeup interval will yield very low average current, if the interrupt latency is ok. Even 50ms should be <10uA. If you want to push the envelope, you could implement ...

What's your current CMakeLists.txt?

1. I'm not sure, but given the source has a delay in it I'd suggest trying the same: https://github.com/espressif/esp-idf/blob/c1d0daf36d0dca81c23c226001560edfa51c30ea/components/soc/src/esp32/rtc_time.c#L143 especially if you're getting a WDT. Maybe the RTC has lower priority and you need to yield ...

You're complicating it. Just do the readings and go back to sleep. There's practically nothing to be gained by even spinning up separate tasks. void setup() { Serial.begin(115200); analogRead x4 i2c Serial.println("Going to sleep now"); Serial.flush(); esp_deep_sleep(TIME_TO_SLEEP * uS_TO_S_FACTOR);...

I've uploaded an example here:
https://github.com/boarchuz/s2-ulp-fsm-demo (fiddles with some variables, shows some new instructions, toggles LED)

You'll need the changes to IDF here:
https://github.com/boarchuz/esp-idf/tree/s2-ulp-fsm