Add Arduino sketch for serial pan/tilt

arduino/serial_pan_tilt/serial_pan_tilt.ino

@@ -0,0 +1,58 @@
+#include <Servo.h> 
+
+Servo pan, tilt;
+
+String inputString = "";         // a string to hold incoming data
+boolean stringComplete = false;  // whether the string is complete
+
+void setup() 
+{
+  Serial.begin(9600);
+  inputString.reserve(200);
+  pan.attach(9);
+  pan.write(90);
+  tilt.attach(10);
+  tilt.write(90);
+} 
+
+void loop() 
+{
+  if(stringComplete)
+  {
+    if(inputString.substring(0,1) == "H")
+    {
+      pan.write(90);
+      tilt.write(90);
+      Serial.println("Going home");
+    }
+    if(inputString.substring(0,1) == "P")
+    {
+      char pan_value = inputString.substring(1).toInt();
+      pan.write(pan_value);
+      Serial.println("Moving pan");
+    }
+    if(inputString.substring(0,1) == "T")
+    {
+      char tilt_value = inputString.substring(1).toInt();
+      tilt.write(tilt_value);
+      Serial.println("Moving tilt");
+    }
+
+    inputString = "";
+    stringComplete = false;
+  }
+}
+
+void serialEvent() {
+  while (Serial.available()) {
+    // 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;
+    } 
+  }
+}