Esp32s3 power question

Projects General Guidance
1

Hi all,

I have a question about powering the Xiao ESP32S3 board.

I am powering the board with a 3.7V battery connected to the B+ and B- pads on the underside. I have read on the wiki that this diables the 5v and 3v pins. How can I power my peripherals (In this case MPU6050 and a BMP280). I am confident the polarity is correct (checked with multimeter)

I can put 3.7V into the 5V pin on the ESP32S3 and share this line with the components, but I assume this isn't the best way of doing things.

Thank you in advance.

2

Well, there is a forum SEEED run;

https://forum.seeedstudio.com/c/products/xiao/91

Where does the Wiki say the 3.3V output is disabled when running from battery ?

What voltage do you measure on the 3.3V pin when running from battery ?

3

Yes, sorry - I'm measuring 3.3V on that pin. I think I need 5V for the peripheral components tbhough?

4

Most modules (MPU and BMP) work at 3.3V. Read the specs of your specific modules though.

5

Those are natively 3.3V parts so you should be able to get them on boards designed for 3.3V use.

There might well be boards out there using them that are designed for 5V operation, so dont use those.

And where did the Wiki say 3V pin was disabled when running from battery ?

6

No only the 5V pin, you still have 3.3V