NEXTION 16 Keys Matrix Keypad 4x4 Membrane Keyboard Module Array Switch for Arduino

The Keypad library allows development board to read a matrix type keypad 44 numeric keypads are widely used in project which requires the user to give command to the system or to feed in some data You dont need the outer two pins on the left and right for wiring Its the inner 8 pins that matter If you solder on a header we highly recommend laying down some flux on the pads first inserting the header pins then soldering The standard Keypad library for arduino works out of the box with this particular device If you have any problem please do as follow click DIYmallsyou can find Sold by DIYmalls under Buy Now button in the new page click Ask a question.