Waveshare AW9523B IO Expansion Board I2C Interface Allows Using 4 Expansion Boards at The Same Time Allows Expanding Up to Expands 16 I/O Pins Compatible with Raspberry Pi
Waveshare AW9523B IO Expansion Board for Raspberry Pi/Arduino/STM32,Expands 16 I/O Pins,Allow 4 Expansion Boards at The Same Time,Expand Up to 64 I/O Ports,I2C Interface