Throttled sensor example

Signed-off-by: Rick Waldron waldron.rick@gmail.com <waldron.rick@gmail.com>

examples/piezo.js

@@ -15,3 +15,7 @@ board.on('ready', function(){
     piezo.note('b', 1100);
   }, 1000);
 });
+
+
+// Resources
+//  http://arduino.cc/en/Tutorial/Tone4

examples/sensor-throttled.js

@@ -0,0 +1,36 @@
+var arduino = require('../'),
+    board, sensor, piezo;
+
+board = new arduino.Board({
+  debug: false
+});
+
+sensor = new arduino.Sensor({
+  board: board,
+  pin: 'A0',
+  throttle: 100
+});
+
+piezo = new arduino.Piezo({
+  board: board,
+  pin: 11
+});
+
+sensor.on('read', function(err, value) {
+  value = +value;
+
+  // |value| is the raw sensor output
+  console.log( value );
+
+  if ( value > 0 ) {
+    piezo.note('b', 100);
+  }
+});
+
+// Tested with:
+// SoftPot
+//  http://www.spectrasymbol.com/how-it-works-softpot
+//  http://www.sparkfun.com/datasheets/Sensors/Flex/SoftPot-Datasheet.pdf
+//
+// sensor
+//  http://www.ladyada.net/learn/sensors/cds.html

examples/sensor.js

@@ -12,8 +12,8 @@ sensor = new arduino.Sensor({
 
 sensor.on('read', function(err, value) {
   value = +value;
-  // |value| is reading of the light dependent resistor
-  console.log(value/4);
+  // |value| is the raw sensor output
+  console.log( value );
 });
 
 // Tested with:

lib/sensor.js

@@ -15,7 +15,7 @@ var Sensor = function (options) {
   // Poll for sensor readings
   setInterval(function () {
     this.board.analogRead(this.pin);
-  }.bind(this), 50);
+  }.bind(this), options.throttle || 50);
 
   // When data is received, parse inbound message
   // match pin to instance pin value