Hi, i'm looking for a keypad I2c to use with Arduino Mega and the library keypad
http://www.arduino.cc/playground/code/Keypad
Someone can help me?
Thanks
N
(...) Keypad_I2C library. That library adds support for using a matrix keypad with I2C port expanders
I think the library doesn't refer to any sort of "i2c keypad", but rather a way to build one by tying rows and columns pins of the keypad not directly to the arduino pins, but to a i2c port expander.
Searching for
arduino i2c port expander
brings up a lot of interesting links...
HTH
I have Arduino MEGA.
May be better to use the seven pins direcrly?
N
Yes, it could be easier. From what I can see, the I2C port expander option is useful when you don't have enough pins to go direct.