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sentence=Control display, read button state and toggle backlight of LCDKeypad shield.
paragraph=LCDKeypad shield is quite common and popular. It includes 16x2 HD44780 compatible LCD and 5 push buttons. Pins 4, 5, 6, 7, 8, 9 are used to interface with the LCD. Backlight on/off function is controlled via pin 10. Analog pin 0 is used to read the buttons.