I have had much struggle trying to get my Adafruit 3x4 membrane keypad to work recently, and I am still no further forward. All I need to know now is how I actual connect the thing. It is attached to a 7 pin header: 3 pins for the 3 columns and 4 pins for the 4 rows.
Various tutorials have said that I need to check each row in turn; thankfully, I know the code pretty well. However, I do not know how to connect the keypad.
Firstly, does the keypad require power and ground. Does it need any resistors. At the moment I have simply connected each pin on the header to a different GPIO pin on the Raspberry Pi's GPIO. This seems to give me very weird results.
Am I connecting it wrong; does anybody know of a better way to connect the Adafruit 3x4 membrane keypad with 7 pin header?
Any suggestions will be greatly appreciated.