ESP32 Thing Plus WROOM & LiPo Batteries

Components & Accessories Power
1

Hello,

I’m new to this forum and the boards, so I apologize if this question has been asked multiple times before (I wasn’t able to find an exact answer).

I’m using the ESP32 Thing Plus - WROOM board: https://www.sparkfun.com/products/15663

  1. In the documentation it’s specified that the max operating voltage is 3.6V, but also it links to single cell LiPo batteries with 3.7V OCV. So just to be safe, I wanted to check if the board regulates the LiPo voltage to make sure it’s within the operating range? If not , what other LiPo batteries would you recommend using?

  2. How would you recommend to keep track of the battery voltage during use to prevent brownouts? (ex. the ranges of 0-100% voltage to send battery percentage to a phone app through BLE)

Any help is appreciated,

Thanks!

2

Hi sghetkat, thanks for posting!

The Thing Plus WROOM has a voltage regulator on it that takes a lipo’s 3.7 to 4.2 volts and drops that down to a steady 3.3 volts to keep the board happy. If you wanted to be able to monitor the batteries charge status, you’d need to connect something like our [LiPo Fuel Gauge between the battery and the Thing Plus and then write a bit of code to have the Thing Plus query the Fuel Gauge for the batteries current status.](SparkFun LiPo Fuel Gauge - TOL-20680 - SparkFun Electronics)

3

Hi @TS-Chris,

Thank you so much for the quick reply!

I will look into the Fuel Gauge option as well :slight_smile: