Programming the Adafruit INA219 breakout board in Arduino, using the many boards that have I2C, is simple using our library:

Install the Library

Open up the Arduino library manager:

Search for the Adafruit INA219 library and install it

We also have a great tutorial on Arduino library installation at:
http://learn.adafruit.com/adafruit-all-about-arduino-libraries-install-use

Load the Example

• Select "File -> Examples -> Adafruit_INA219 -> getcurrent"
• The "getcurrent" example code should open in a new IDE window.

Run it

• Click on the upload button in the IDE. When it is "done uploading"
• Open your Serial Monitor and set the speed to 115200 baud.

The output should appear similar to the sample below:

Customize it

You can adapt, expand or modify the example code to suit your project requirements.  For a detailed description of the available library functions, see the Library Reference on the next page.