PCF8575 I/O Expander with ESP32 to read multiple IR Sensor module

Hi Mr.Renzo, I need help using PCF8575 with esp32. My project want to use PCF8575 to read 45 IR sensor, i already follow your tutorial and succeed using button as in input, but for IR sensor i have no idea how to implement it. Can you give some idea about the connection and the codes then i can test it? Felani