ESP32 Forum

Hello,

Programming a board with the Arduino IDE, I need to keep a couple pins low during deep sleep (GPIO_NUM_5 and 33). I've found that I need to call gpio_deep_sleep_hold_en() in order to achieve this, but when I do that, my current goes from 21uA during deep sleep (I'm using a dev board) to 270uA during deep sleep. Is this expected, that holding the GPIO state turns on something else that just burns 10x the power?

Thanks.

One other thing. One of the pins I need to hold low during deep sleep is GPIO_NUM_33. Feels like that shouldn't be a big deal, but the this pin wants to sit at around 0.15V even after being set low during the code and even after I use the gpio_deep_sleep_hold_en() call before sleeping. The pin will be at ground during the code since I set it there, and then as soon as the core sleeps, it goes up to that ~0.15V. Any advice there would also be greatly appreciated. Thanks again.

Use external pull down resistor.

With nothing connected to the pin,

- Internal Pull-down value: ~45K
- Your Vcc: 3.3V (?)
= 73uA per pin

Depending on the external circuitry hooked to those pins, it could increase the current drain as well.

The 45K pull-down is average, it can vary a lot.

Can you share the general connection to each pin?