I2C-Bus Expandability: Supports cascading multiple I2C modules I/O Scalability: Up to 64 I/O with PCF8574 Typical Applications: I/O resource-scarce MCU expansion Features: **Versatile I/O Expansion** The PCF8574 PCF8574T IO Expansion Board is a versatile solution for MCUs with limited I/O ...
, INPUT_PULLUP); attachInterrupt(Pin(GPIO_PCF8574_INT), PcfInputIsr, CHANGE); } } } void Pcf8574Powervoid) { power_t rpower =XdrvMailbox.index >> Pcf8574.relayoffset; for (uint32_t index = 0; index < Pcf8574relay_max; index++) { _t state = rpower &1; if...