2 x 2 Matrix 4 Push Button Keyboard Module

The 2?2 matrix keypad module usually is used as input in a project. It has 4 keys in total, which means the same input values. The module is a non-encoded matrix keypad consisting of 14 keys in parallel. The keys of each row and column are connected through the pins outside ? pin R1-R2 as labeled beside control the rows, when L1-L2, the columns. It consists of microswitch buttons. The module has four holes 3mm (M3) holes for mounting. The pin designations on each PCB are shown on each PCB. Two pins are thus used as an ?x? coordinate and the other 2 as a ?y? coordinate.The module is already equipped with a soldered pin-headers (rotated 90 degrees)