This is the Adafruit INA3221 library.
Tested and works great with the Adafruit INA3221 Breakout Board: http://www.adafruit.com/product/6062
This chip uses I2C to communicate, 2 pins are required to interface
Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit!
Written by Limor Fried for Adafruit Industries.
MIT license, check license.txt for more information. All text above must be included in any redistribution
To install, use the Arduino Library Manager and search for "Adafruit INA3221" and install the library.