ATMEGA328 PullUp Resistor

[Soloam]

Hello, I would like to make a smaller solution to my nodes, so I'm going to make a standalone ATMEGA 328 solution.

I have the node working and I would like to use it to make a switch, when I press a button I want my ATMEGA to do something (for example turn on the light). Can I use the same approach that it's used here http://www.mysensors.org/build/binary ? Ground to Digital pin with a switch in the middle! Electronic is not my strong point, and I don't want to blow my atmegas.

Thank You

[peteorito]

Yes! with digitalWrite(BUTTON_PIN,HIGH); you put BUTTON_PIN with A PullUp Resistor

[AWI]

The code:

// Setup the button
  pinMode(BUTTON_PIN,INPUT);
  // Activate internal pull-up
  digitalWrite(BUTTON_PIN,HIGH);

could/ should be replaced by, more natural and easy to comprehend... (since IDE 1.0.1)

// Setup the button and internal pull_up
  pinMode(BUTTON_PIN, INPUT_PULLUP);

[Soloam]

Thank you all for the fast response!

Best Regards