SparkFun Qwiic GPIO

SparkFun Qwiic GPIO adds eight additional IO pins to the Qwiic project that can read/write like any other pin on the controller. This GPIO is an I²C device based around the Texas Instruments TCA9534 I/O expander IC. The pins of the TCA9534 IC are broken out into easy-to-use latch terminals that remove the need for screwing wires into place. This GPIO features an input polarity inversion register, open-drain active-low interrupt output, and two Qwiic connectors. The SparkFun Qwiic GPIO offers the option to control each I/O pin individually or simultaneously.