Comments on: How to Connect Multiple Arduino Microcontrollers with I2C http://hacknmod.com/hack/how-to-connect-multiple-arduino-microcontrollers-using-i2c/ Amazingly Cool Hacks, Mods, and DIY Projects Sun, 22 Nov 2009 04:35:05 -0600 http://wordpress.org/?v=2.8.6 hourly 1 By: Velon http://hacknmod.com/hack/how-to-connect-multiple-arduino-microcontrollers-using-i2c/comment-page-1/#comment-9423 Velon Thu, 13 Aug 2009 21:25:34 +0000 http://hacknmod.com/?p=3161#comment-9423 Hello! I've done some time in practice with the Arduino I2Cbus based on the Philips device PCF8574P, the truth is that I had no idea how complicated that would be, in principle I am trying to make a 4x3 numeric keypad, as is the example shown in this link: http://www.arduino.cc/playground/Main/I2CPortExpanderAndKeypads I can not get back the number of the button pressed. I can help, what should I do to show me the number for the button pressed. Thanks for your reply. Hello!
I’ve done some time in practice with the Arduino I2Cbus based on the Philips device PCF8574P, the truth is that I had no idea how complicated that would be, in principle I am trying to make a 4×3 numeric keypad, as is the example shown in this link:

http://www.arduino.cc/playground/Main/I2CPortExpanderAndKeypads

I can not get back the number of the button pressed.

I can help, what should I do to show me the number for the button pressed.

Thanks for your reply.

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