SARADC do not work when enable automatic light sleep

Ybin_ESP
Posts: 18
Joined: Wed Apr 10, 2024 2:51 am

SARADC do not work when enable automatic light sleep

Postby Ybin_ESP » Fri Oct 17, 2025 9:53 am

Hello guys,

When use tickless idle in RTOS, I see my ADC reading I get from raw data all are fix 4041!
It seems maybe ADC could be powered down in automatic light sleep.
https://docs.espressif.com/projects/esp ... ement.html
Is it possible to force SARADC do not power down in auto light sleep?
Last edited by Ybin_ESP on Sat Oct 18, 2025 8:26 am, edited 1 time in total.

Ybin_ESP
Posts: 18
Joined: Wed Apr 10, 2024 2:51 am

Re: SARADC do not work when enable automatic light sleep

Postby Ybin_ESP » Fri Oct 17, 2025 9:58 am

As you see. I didn't check the option below,
[uncheck]Power down Digital Peripheral in light sleep (EXPERIMENTAL)

Ybin_ESP
Posts: 18
Joined: Wed Apr 10, 2024 2:51 am

Re: SARADC do not work when enable automatic light sleep

Postby Ybin_ESP » Sat Oct 18, 2025 8:22 am

If power management lock can be the only one solution, does this mean that the system will never work automatic light-sleep? However, ADC have to be reinitialized each time wake-up?

Make me confuse.

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