blue book examples

java/examples/Books/Processing Handbook/Extensions/Electronics/_04A/_04A.pde

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+// Read data from the serial port and set the position of a servomotor
+// according to the value
+Servo myservo; // Create servo object to control a servo
+
+int servoPin = 0; // Connect yellow servo wire to digital I/O pin 0
+int val = 0; // Data received from the serial port
+
+void setup() {
+  myservo.attach(servoPin); // Attach the servo to the PWM pin
+  Serial.begin(9600); // Start serial communication at 9600 bps
+}
+
+void loop() {
+  if (Serial.available()) { // If data is available to read,
+    val = Serial.read(); // read it and store it in val
+  }
+  myservo.write(val); // Set the servo position
+  delay(15); // Wait for the servo to get there
+}