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RPI GPIO Shield turned Raspberry Pi GPIO into the normally-used Arduino I/O interface. The shield not only maintained most of Arduino UNO I/O interface but also expanded IIC interfaceUART TX/RX interface and SPI interface electronic bricks interface. RPI GPIO Shield inherited the Arduino UNO I / O all the features which can be used to drive LED sensors LCD and other electronic modules and components. Note: When RPI GPIO Shield connected with Raspberry Pi GPIO please make sure their pins are corresponding with each other.