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\f0\fs24 \cf0 /*\
Connecting Arduino to Processing\
https://learn.sparkfun.com/tutorials/connecting-arduino-to-processing/to-processing\
\
3. Shaking Hands - when both A and P are both sending and receiving data\
\
*/\
\
#include <SoftwareSerial.h>\
\
#define RX    0\
#define TX    1   \
\
SoftwareSerial Serial(RX, TX);\
\
char val; // Data received from the serial port\
int ledPin = 8; // \
boolean ledState = LOW; //to toggle our LED\
\
\
void setup() \{\
  pinMode(ledPin, OUTPUT); // Set pin as OUTPUT\
  Serial.begin(9600); //initialize serial communications at 9600 baud rate\
  establishContact(); // send a byte to establish contact until receiver responds\
\}\
\
void loop() \{\
  if (Serial.available() > 0) \{ // If data is available to read,\
    val = Serial.read(); // read it and store it in val\
    if(val == '1') //if we get a 1\
    \{\
      ledState = !ledState; //flip the ledState\
      digitalWrite(ledPin, ledState);\
    \}\
    delay(100);\
  \}\
    else \{\
    Serial.println("Hello, world!"); //send back a hello world\
    delay(100);\
    \}\
    //Serial.println("dO S");\
    //delay(100);\
 \}\
\
/*\
This function just sends out a string  to see if it hears anything back - \
indicating that Processing is ready to receive data.\
*/\
void establishContact() \{\
  while (Serial.available() <= 0) \{\
  Serial.println("A"); // send a capital A\
  delay(300);\
  \}\
\}\
}