Deep sleep

gado070707
Posts: 4
Joined: Tue Jul 25, 2017 1:56 pm

Deep sleep

Postby gado070707 » Wed Apr 18, 2018 8:19 pm

Hello, I use the ESP32 that you can find there Image and consume in deep sleep 11mA.
While watching this video https://youtu.be/-769_YIeGmI, I realize that there are other ESP32 consuming less energy in deep sleep especially on this video where we can see an ESP32 firebeetle consuming only 60µA in deep sleep https://youtu.be/y1R2y8dCsIg.
I wonder then if I should not invest in an ESP32 firebeetle or wait for the next arrival of a code example on Arduino using the ULP and so down the energy consumed and arrive at the same level as the ESP32 firebeetle.
I would like to have your opinion?
For information, I develop under the arduino IDE.
Thank you.
Regards.

rin67630
Posts: 64
Joined: Sun Mar 11, 2018 5:13 pm

Re: Deep sleep

Postby rin67630 » Thu Apr 19, 2018 7:41 am

You will probably notice something strange: plug your module into a computer's USB and unplug it.
The consumption will drop to about 2mA, which is drawn by the 3,3v regulator.
The 11 mA are mainly drawn from the USB driver chip, which is active by default.
Once it notices a disconnection it goes to low power idle...
Stupidly, you have got no way to put the USB to low power idle from the ESP32 side with C++ code.
:-(

Apparently the fire Beetle uses an additional USB-TTL converter, that can be unplugged...
Last edited by rin67630 on Sat Apr 21, 2018 8:59 pm, edited 1 time in total.

gado070707
Posts: 4
Joined: Tue Jul 25, 2017 1:56 pm

Re: Deep sleep

Postby gado070707 » Sat Apr 21, 2018 5:14 pm

Thank you for this quick response.
Not being at home now, I can not test the operation cited.
I only have to buy the ESP32 firebeetle.
Good evening.
Regards.

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