SparkFun Qwiic Button Hookup Guide
Contributors:
El Duderino
El Duderino 
Register Map
If you would like to use a different development environment than Arduino, you can use the register map below to communicate with the Qwiic Button.
You can also download the PDF.
The Qwiic Button behaves as a normal I2C device. First write the address of the register you would like to read or write, then follow that I2C command with a Read to read the given register or a Write and a data byte to write to a register.