Arduino Tutorial: Read Button and Send Data to PC
/* Basic Digital Read
* ------------------
*
* turns on and off a light emitting diode(LED) connected to digital
* pin 13, when pressing a pushbutton attached to pin 7. It illustrates the
* concept of Active-Low, which consists in connecting buttons using a
* 1K to 10K pull-up resistor.
*
* Created 1 December 2005
* copyleft 2005 DojoDave <http://www.0j0.org>
* http://arduino.berlios.de
*
*/
/* Sean Dockray added three lines to demonstrate sending button presses in to a PC! */
int ledPin = 13; // choose the pin for the LED
int inPin = 7; // choose the input pin (for a pushbutton)
int val = 0; // variable for reading the pin status
void setup() {
pinMode(ledPin, OUTPUT); // declare LED as output
pinMode(inPin, INPUT); // declare pushbutton as input
beginSerial(19200); // added by SD: intiate serial communication
}
void loop(){
val = digitalRead(inPin); // read input value
if (val == HIGH) { // check if the input is HIGH (button released)
digitalWrite(ledPin, LOW); // turn LED OFF
serialWrite(0); // added by SD: send some data to the computer to
} else {
digitalWrite(ledPin, HIGH); // turn LED ON
serialWrite(1); // added by SD: send some data to the computer to
}
}Submitted by seandockray on 16 October 2006 - 4:25pm.
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