GPIO9 leak in lightsleep

danielrp
Posts: 3
Joined: Tue Jun 12, 2018 3:09 pm

GPIO9 leak in lightsleep

Postby danielrp » Tue Jul 17, 2018 2:20 pm

Hello,

I am working on a project with an ESP32-PICO-D4 SOC. The board has several LEDs, in particular, one of them behaves unexpectedly when entering in lightsleep mode.

If the function esp_sleep_enable_timer_wakeup(time in us) is executed before executing esp_light_sleep_start(), there is a small flow of current through the LED that causes a visible light, even though the LED is turned off. I am attaching a drawing of this part of the schematic.

If the function esp_light_sleep_start() is executed without executing esp_sleep_enable_timer_wakeup, there is no light in the LED.

I would like to know what is causing this behavior and if is there any way to avoid it.

Regards,

Daniel.
Attachments
GPIO9.jpg
Drawing of the LED connection
GPIO9.jpg (21.53 KiB) Viewed 2338 times

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