Power Consumption in Deep Sleep

EDsteve
Posts: 10
Joined: Fri May 06, 2022 4:53 pm

Re: Power Consumption in Deep Sleep

Postby EDsteve » Sun May 08, 2022 5:49 pm

I have done some investigation and so far this is my status:

EDIT: The power consumption problem is not only happening in deep sleep but also in on state of the ESP32!

- My ESP32 gets 3,3V directly to the 3,3V pin on the ESP32
- The Power LED has been removed
- I have the example deep sleep sketch running on the ESP
- MOST of the time it consumes 13mA in dep sleep

BUT when i connect the USB cable to it. The power consumptions suddenly drops to 4mA. Or sometimes i restart the ESP32 with the USB cable attached and it still uses 13mA. But then when i unplug the USB cable. It uses only 4mA. This is kind of random and not always the same. But the powerconsumption definitely drops when i plugin or remove the USB connection.

So i tried to give 5V to the USB (without any other USB pins) but that didn't change anything. It must have something to do with the other two USB pins which go to the USB UART converter (CP2102).

This video shows what i mean: https://youtu.be/AiU6VKYXP0k

Anybody an idea?

savage
Posts: 23
Joined: Mon Jul 15, 2019 9:24 pm

Re: Power Consumption in Deep Sleep

Postby savage » Mon May 09, 2022 1:14 pm

EDsteve wrote:
Fri May 06, 2022 5:16 pm
i am dealing with the same (worse) problem. Deep Sleep power consumption is 12mA on the naked dev-board (with the LED removed). I even run the board directly from 3,3V to the 3,3V pin. So i don't even use the LDO.
But you are applying 3.3V to the output pin of the LDO, so the LDO could still be leaking current.

EDsteve
Posts: 10
Joined: Fri May 06, 2022 4:53 pm

Re: Power Consumption in Deep Sleep

Postby EDsteve » Tue May 10, 2022 3:28 am

That's what i thought too. But even i cut the LDO off. No change. Hmm.

JoeSensoric
Posts: 23
Joined: Fri Mar 03, 2017 10:31 am

Re: Power Consumption in Deep Sleep

Postby JoeSensoric » Tue May 10, 2022 6:56 am

Andreas Spiess maintains a table with details of many ESP32 boards including power consumption in different modes and the used voltage regulator. Here is a video about "Test of Battery operated ESP32 Boards". A link to the comparison table is in the description.

https://www.youtube.com/watch?v=ajt7vtgKNNM

EDsteve
Posts: 10
Joined: Fri May 06, 2022 4:53 pm

Re: Power Consumption in Deep Sleep

Postby EDsteve » Thu May 12, 2022 6:35 pm

JoeSensoric wrote: Andreas Spiess maintains a table with details of many ESP32 boards including power consumption in different modes and the used voltage regulator. Here is a video about "Test of Battery operated ESP32 Boards". A link to the comparison table is in the description.

https://www.youtube.com/watch?v=ajt7vtgKNNM
Yes. I have seen this video before. Unfortunately it does not include the standard ESP32 DevKit1 which i am using and need to modify.

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