You're going to need to install a few libraries to use this sensor. These are all in the Arduino Library Manager, so they're quite easy to install.

Library Installation

You're going to need to install a few libraries to use this sensor. These are all in the Arduino Library Manager, so they're quite easy to install.

You can install the Adafruit MLX90640 Library for Arduino using the Library Manager in the Arduino IDE.

Click the Manage Libraries... menu item, search for Adafruit MLX90640, and select the Adafruit MLX90640 library:

Then follow the same process for the Adafruit BusIO library.

In the next page, you'll install all the libraries used for Arcada, which is another dependency.