PCF8574 PCF8574T I/O for I2C Port Interface Support Cascading Extended Module

• This is I/O extended module, which use for I2C interface, you can use two of the module to extend 8 I/O
• Support cascading, and you can use at most 8 modules to extend 64 I/O at the same time.
• Can be changed the address by set toggle switch
• PCB Size: approx. 37.5 x 16.7mm
• Every 2 seconds, make P0-P7 port output High level, Low level, and put 3 toggle switches to ON, the address of module is 0x27