This is a PCF8574 IO expansion module suitable for MCU I/O expansion.
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This is a PCF8574 IO expansion module suitable for MCU I/O expansion. It supports two types of access to the target board interface: pin or row of seats.
It can connect up to 8 PCF8574 IO expansion board to the I2C bus, providing up to 64 I/O ports. This is applicable to projects that need control of LEDs.
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