BQ27220 Example

This example shows how to use the espp::Bq27220 driver to talk to a TI BQ27220 battery fuel gauge over I2C and read the battery:

• Voltage (mV)

• Current (mA)

• State of charge (%)

• Temperature (°C)

How to use example

Hardware Required

This example requires a connection (via I2C) to a board with a BQ27220 battery fuel gauge and an attached battery. Configure the I2C pins (SDA/SCL) via menuconfig for your board.

Build and Flash

Build the project and flash it to the board, then run the monitor tool to view serial output:

idf.py -p PORT flash monitor

(Replace PORT with the name of the serial port to use.)

(To exit the serial monitor, type Ctrl-].)

Example Output

The example logs the battery voltage, current, state of charge, and temperature in a loop.