Added SerialEvent() example

build/shared/examples/4.Communication/SerialEvent/SerialEvent.ino

@@ -0,0 +1,57 @@
+/*
+  Serial Event example
+ 
+ When new serial data arrives, this sketch adds it to a String.
+ When a newline is received, the loop prints the string and 
+ clears it.
+ 
+ A good test for this is to try it with a GPS receiver 
+ that sends out NMEA 0183 sentences. 
+ 
+ Created 9 May 2011
+ by Tom Igoe
+ 
+ This example code is in the public domain.
+ 
+ http://www.arduino.cc/en/Tutorial/SerialEvent
+ 
+ */
+
+String inputString = "";         // a string to hold incoming data
+boolean stringComplete = false;  // whether the string is complete
+
+void setup() {
+  // initialize serial:
+  Serial.begin(9600);
+  // reserve 200 bytes for the inputString:
+  inputString.reserve(200);
+}
+
+void loop() {
+  // print the string when a newline arrives:
+  if (stringComplete) {
+    Serial.println(inputString); 
+    // clear the string:
+    inputString = "";
+    stringComplete = false;
+  }
+}
+
+/*
+  SerialEvent occurs whenever a new byte comes in the
+ hardware serial RX.  Don't do complex things here, as thge
+ processor halts the regular program to run this routine:
+ */
+void serialEvent() {
+  // get the new byte:
+  char inChar = (char)Serial.read(); 
+  // add it to the inputString:
+  inputString += inChar;
+  // if the incoming character is a newline, set a flag
+  // so the main loop can do something about it:
+  if (inChar == '\n') {
+    stringComplete = true;
+  } 
+}
+
+