ULP check if esp32 is currently sleeping

[Larsogames]

Hello Forum,

Is it possible to let the ULP-Coprocessor determine current sleep state (i.e. let the ULP check if system is in light_sleep or deep_sleep)?

Thank you,
Lars

[boarchuz]

It's common to check RTC_CNTL_RDY_FOR_WAKEUP for wakeup readiness: https://docs.espressif.com/projects/esp ... p-the-chip
This should be effectively the same, for deep sleep at least.

[Larsogames]

It's common to check RTC_CNTL_RDY_FOR_WAKEUP for wakeup readiness: https://docs.espressif.com/projects/esp ... p-the-chip
This should be effectively the same, for deep sleep at least.

Thanks!

Works like a charm!

RTC_CNTL_RDY_FOR_WAKEUP is always 0 when esp is active and seems always 1 of esp is sleeping