Power ESP32 through 3.3V Pin
Posted: Wed Jan 02, 2019 11:02 pm
Hello,
I am using the DOIT ESP32 DEVKIT V1. I am trying to power it using an 18650 ranging from 3.3v-4.2v. If I connect battery positive to esp32 3.3v pin and battery negative to esp GND, the board powers up, lights up the on LED, and runs any sketch I have tried so far.
It runs no problem when the battery is at the low end (3.3v) as well as at the high end (4.2v).
I can write a pin high, which then goes to the battery 4.2v, and use this pin to read in other pins high.
My question is why is all of this working? And should I not be doing this? Based on the datasheet and schematic I am surpassing the max voltage on the board as well as the pins, but everything is running fine. I would love to keep this setup, but imagine there is some reason why I should not. Thank you
I am using the DOIT ESP32 DEVKIT V1. I am trying to power it using an 18650 ranging from 3.3v-4.2v. If I connect battery positive to esp32 3.3v pin and battery negative to esp GND, the board powers up, lights up the on LED, and runs any sketch I have tried so far.
It runs no problem when the battery is at the low end (3.3v) as well as at the high end (4.2v).
I can write a pin high, which then goes to the battery 4.2v, and use this pin to read in other pins high.
My question is why is all of this working? And should I not be doing this? Based on the datasheet and schematic I am surpassing the max voltage on the board as well as the pins, but everything is running fine. I would love to keep this setup, but imagine there is some reason why I should not. Thank you