pca9534
There are 3 repositories under pca9534 topic.
bfarnam/xCA9500
Arduino UNIVERSAL xCA95xx i2c GPIO handler/library
circuit-specialists/PCA9534
PCA9534 I/O expander library for use with Arduino
burtyb/CircuitPython_TCA9534
CircuitPython library for TCA9534/PCA9534 8-bit I2C I/O expander