PCF8574 I2C Interface Board for 16×2
and 20×4 LCD Module is used with the microcontrollers As the pin resources of
the controllers are limited, your project may be not able to use normal LCD
shield after connected with a certain quantity of sensors or SD card. However,
with this I2C interface module, you will be able to realize data display via
only 2 wires. If you already has I2C devices in your project, this LCD module
actually cost no more resources at all.
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