Search the “Libraries” tab for “SparkFunMAX17043” to find the Fuel Gauge

library.

If you’re using the desktop version of the IDE, Particle Dev, and still want to

use the library, you can grab the latest version from our GitHub repository.

Running the MAX17043_Simple Example

After finding the library, navigate to “MAX17043_Simple.cpp” and click Use

This Example – the Build IDE will create a clone of this sketch in your

“Code” tab.

You shouldn’t have to change anything, just make sure your Photon is

selected in the “Devices” tab, and click “Flash”.

Once your Photon is running the code, there are two ways to view its data.

One is to open a serial terminal (see our Serial Terminal Basics tutorial if

you need help with this). Find your Photon’s serial port number (“COM#” on

Windows “/dev/tty.usbmodemXXXX” on Mac) and set the baud rate to

9600. The battery’s voltage, state-of-charge, and alert status will stream by.

Using TeraTerm to view the Photon’s Serial.print debug output.

Since USB is plugged in, the voltage and percentage should steadily

increase as the battery charges.

Alternatively, if you want to monitor the battery discharge, you can use the

Photon’s Internet-connectivity to view the battery voltage and charge status.

First, though, you’ll need to identify your Photon’s device ID as well as your

account’s access token. The device ID can be found in Particle Build by

clicking the ‘>’ next to your device name.

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