// We will be using D1 to control our LED
int ledPin = D2;
// Our button wired to D3
// We wire D0 to the middle terminal on the switch
// And any of the two other terminals to ground
int switchPin = D3;
void setup()
{
// For input, we define the
// switch as an input-pullup
// this uses an internal pullup resistor
// to manage consistent reads from the device
pinMode( switchPin , INPUT_PULLUP); // sets pin as input
// We also want to use the LED
pinMode( ledPin , OUTPUT ); // sets pin as output
}
void loop()
{
// find out if the button is pushed
// or not by reading from it.
int buttonState = digitalRead( switchPin );
// Using a pulldown resistor we get a LOW
// Signal when its on
if( buttonState == LOW )
{
// turn the LED On
digitalWrite( ledPin, HIGH);
}else{
// otherwise
// turn the LED Off
digitalWrite( ledPin, LOW);
}
}
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