http://forum.arduino.cc/index.php?topic=301382.0 The suggestion in this post is weird. Do I need to endage all the pins involved?
I saw this but I didn't find another good forum post on the subject.
My pad looks like this photo:
Are jumpers in the right places?
I would like to know if I can use this keypad with I2c and what other ways I can use it besides the direct parallel data input with 8 pins.
Does anybody have an experience where there small arduino-based device used such data input device?