I am currently working on a project that needs to run on a battery for long time.
Some sort of data-logger for vibrations.
I intend to keep in deep sleep the main core of the ESP32 and wake it up with the help of ULP co-processor from time to time when a change in the magnetic field is detected as explained in these posts:
viewtopic.php?t=4608
viewtopic.php?t=6449
In order to ensure the duration of the battery I am currently measuring the current consumed by the following board that I am using:
https://wiki.wemos.cc/_media/products:l ... v1.0.0.pdf
(By the way, this board has been recently discontinued).
I am supplying the 3.3V directly to the 3.3v pin, but I am measuring a consumption of 2.6mA !!!
Apparently this consumption is due to the presence of the CP2104 that is directly connected to the 3.3V line that I am supplying.
I found also this review of several development board that is highlighting the same problem with CP2104: https://blog.voneicken.com/2018/lp-wifi-esp32-boards/
I wonder if you are aware of any ESP32 development board that is really consuming nothing if I am directly supplying the 3.3V line from the extern.
Thank you
