first commit

Software/NodeJS/.gitignore

@@ -0,0 +1,15 @@
+raw
+node_modules
+.log
+.idea
+.swp
+.*.swp
+._*
+.DS_Store
+.git
+.hg
+.lock-wscript
+.svn
+.wafpickle-*
+CVS
+npm-debug.log

Software/NodeJS/CONTRIBUTING.md

@@ -0,0 +1,7 @@
+## How to contribute to GrovePi for Node.js
+
+* Before you open a ticket or send a pull request, [search](https://github.com/DexterInd/GrovePi/issues) for previous discussions about the same feature or issue. Add to the earlier ticket if you find one.
+
+* Use the coding style suggested by [npmjs](https://docs.npmjs.com/misc/coding-style).
+
+* Be creative :-)

Software/NodeJS/LICENSE

@@ -0,0 +1,24 @@
+## License
+
+The MIT License (MIT)
+
+GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
+Copyright (C) 2017  Dexter Industries
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Software/NodeJS/README.md

@@ -0,0 +1,154 @@
+GrovePi for Node.js
+=======
+
+GrovePi is an open source platform for connecting Grove Sensors to the Raspberry Pi.
+
+## Quick start
+
+Before to start you should install Node.js on your RaspberryPi and clone the repo on your local environment.
+Be sure to have npm installed and then you can proceed installing the package.
+To install node.js you can do the following:
+
+```bash
+curl -sL https://deb.nodesource.com/setup_7.x | sudo -E bash -
+sudo apt-get install nodejs
+cd $HOME && mkdir .node_modules_global
+npm config set prefix $HOME/.node_modules_global
+```
+
+#### Installing Package from NPM Repository
+
+Go inside your Node.js application folder and type
+```bash
+$ npm install node-grovepi
+```
+
+#### Installing Package by Linking the Project In This Repo
+
+`cd` to `libs` directory in this folder and type
+```bash
+npm install
+npm link
+```
+
+Now, inside your own app (which can be anywhere in `$HOME`) you need to run
+```
+npm link node-grovepi
+```
+once in order to link your project to the library that's in this repository (`libs`) folder.
+
+#### Using the Library
+
+Now you can include the module inside your application:
+```javascript
+var GrovePi = require('node-grovepi').GrovePi
+```
+
+At this point you may need to include the GrovePi base classes:
+```javascript
+var Commands = GrovePi.commands
+var Board = GrovePi.board
+```
+
+If the sensor/component you need to use already has the classes then you can include them:
+```javascript
+var AccelerationI2cSensor = GrovePi.sensors.AccelerationI2C
+var UltrasonicDigitalSensor = GrovePi.sensors.UltrasonicDigital
+var AirQualityAnalogSensor = GrovePi.sensors.AirQualityAnalog
+var DHTDigitalSensor = GrovePi.sensors.DHTDigital
+var LightAnalogSensor = GrovePi.sensors.LightAnalog
+var DigitalButtonSensor = GrovePi.sensors.DigitalButton
+var LoudnessAnalogSensor = GrovePi.sensors.LoudnessAnalog
+var RotaryAngleAnalogSensor = GrovePi.sensors.RotaryAnalog
+```
+
+Now you can instantiate the GrovePi and your sensors/components, for example:
+```javascript
+var board = new Board({
+    debug: true,
+    onError: function(err) {
+      console.log('Something wrong just happened')
+      console.log(err)
+    },
+    onInit: function(res) {
+      if (res) {
+        console.log('GrovePi Version :: ' + board.version())
+
+        var lightSensor = new LightAnalogSensor(2)
+        console.log('Light Analog Sensor (start watch)')
+        lightSensor.on('change', function(res) {
+          console.log('Light onChange value=' + res)
+        })
+        lightSensor.watch()
+      }
+    }
+  })
+```
+
+If there is no class for your sensors or components then you can write your own functions for them:
+_Note: every custom function must be called only after the Board init._
+```javascript
+function customAccelerationReading() {
+  var write = board.writeBytes(Commands.acc_xyz.concat([Commands.unused, Commands.unused, Commands.unused]))
+  if (write) {
+    board.wait(100)
+    board.readByte()
+    var bytes = board.readBytes()
+    if (bytes instanceof Buffer) {
+      var x = bytes[1] > 32 ? -(bytes[1]-224) : bytes[1]
+      var y = bytes[2] > 32 ? -(bytes[2]-224) : bytes[2]
+      var z = bytes[3] > 32 ? -(bytes[3]-224) : bytes[3]
+      return [x, y, z]
+    } else {
+      return false
+    }
+  } else {
+    return false
+  }
+}
+```
+
+When you are ready to go you should call the init method
+```javascript
+board.init()
+```
+
+Each sensor/component has at least 3 methods to get access to the data:
+- **read()** - Read data from the sensor/component
+- **stream(delay, callback)** - Start a stream with the sensor/component, each N milliseconds (delay) sends data to the callback. You can use stopStream() to close the connection.
+- **watch(delay)** - Start a polling routine which will fire a "change" event only when there are new data coming from the sensor/component. The internal timer will use the given delay value or 100 milliseconds as default. You can use stopWatch() to stop the polling.
+
+And 1 method to write data:
+- **write(value)** - Write a value on the sensor/component
+
+Some sensors expose additional methods
+- *DigitalButton* sensor exposes a **down** event which has a single argument on the callback. This argument will have the value **singlepress* or **longpress**, depending on how long the user has been pressing the button.
+- *RotaryAngleAnalogSensor* overrides the **read** method to provide noise-less output, since there are cases in which the sensor may incorrectly report that its value has changed. The sensor will return a value from 0 to 100. User also needs to call the **start** method for this sensor.
+- *LoudnessAnalogSensor* provides a **readAvgMax** method which will return average and maximum values coming from the sensor for a period of time. This period restarts every time you call the **readAvgMax** method, so it is supposed that the method is called repeatedly in a timely manner (e.g. with a **setInterval** callback). User has to call the **start** method for the monitoring to begin.
+
+You'll find more complex examples in the "basicTest.js" file under the "tests" folder of the repository.
+
+## License
+
+The MIT License (MIT)
+
+GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
+Copyright (C) 2017  Dexter Industries
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Software/NodeJS/libs/commands.js

@@ -0,0 +1,99 @@
+module.exports = {
+  //Command Format
+  // digitalRead() command format header
+    dRead                                       : [1]
+  // digitalWrite() command format header
+  , dWrite                                      : [2]
+  // analogRead() command format header
+  , aRead                                       : [3]
+  // analogWrite() command format header
+  , aWrite                                      : [4]
+  // pinMode() command format header
+  , pMode                                       : [5]
+  // Ultrasonic read
+  , uRead                                       : [7]
+  // Get firmware version
+  , version                                     : [8]
+  // Accelerometer (+/- 1.5g) read
+  , acc_xyz                                     : [20]
+  // RTC get time
+  , rtc_getTime                                 : [30]
+  // DHT Pro sensor temperature
+  , dht_temp                                    : [40]
+
+  // Grove LED Bar commands
+  // Initialise
+  , ledBarInit                                  : [50]
+  // Set orientation
+  , ledBarOrient                                : [51]
+  // Set level
+  , ledBarLevel                                 : [52]
+  // Set single LED
+  , ledBarSetOne                                : [53]
+  // Toggle single LED
+  , ledBarToggleOne                             : [54]
+  // Set all LEDs
+  , ledBarSet                                   : [55]
+  // Get current state
+  , ledBarGet                                   : [56]
+
+  // Grove 4 Digit Display commands
+  // Initialise
+  , fourDigitInit                               : [70]
+  // Set brightness, not visible until next cmd
+  , fourDigitBrightness                         : [71]
+  // Set numeric value without leading zeros
+  , fourDigitValue                              : [72]
+  // Set numeric value with leading zeros
+  , fourDigitValueZeros                         : [73]
+  // Set individual digit
+  , fourDigitIndividualDigit                    : [74]
+  // Set individual leds of a segment
+  , fourDigitIndividualLeds                     : [75]
+  // Set left and right values with colon
+  , fourDigitScore                              : [76]
+  // Analog read for n seconds
+  , fourDigitAnalogRead                         : [77]
+  // Entire display on
+  , fourDigitAllOn                              : [78]
+  // Entire display off
+  , fourDigitAllOff                             : [79]
+
+  // Grove Chainable RGB LED commands
+  // Store color for later use
+  , storeColor                                  : [90]
+  // Initialise
+  , chainableRgbLedInit                         : [91]
+  // Initialise and test with a simple color
+  , chainableRgbLedTest                         : [92]
+  // Set one or more leds to the stored color by pattern
+  , chainableRgbLedSetPattern                   : [93]
+  // Set one or more leds to the stored color by modulo
+  , chainableRgbLedSetModulo                    : [94]
+  // Sets leds similar to a bar graph, reversible
+  , chainableRgbLedSetLevel                     : [95]
+
+  // Grove IR sensor
+  // Read the button from IR sensor
+  , irRead                                      : [21]
+  // Set pin for the IR reciever
+  , irRecvPin                                   : [22]
+
+  // Grove Dust sensor
+  , dustSensorRead                              : [10]
+  , dustSensorEn                                : [14]
+  , dustSensorDis                               : [15]
+
+  // Encoder
+  , encoderRead                                 : [11]
+  , encoderEn                                   : [16]
+  , encoderDis                                  : [17]
+
+  // Grove Flow sensor
+  , flowRead                                    : [12]
+  , flowEn                                      : [18]
+  , flowDis                                     : [13]
+
+  // This allows us to be more specific about which commands contain unused bytes
+  , unused                                      : 0
+};

Software/NodeJS/libs/grovepi.js

@@ -0,0 +1,192 @@
+// Modules
+var i2c         = require('i2c-bus')
+var async       = require('async')
+var log         = require('npmlog')
+var sleep       = require('sleep')
+var fs          = require('fs')
+var commands    = require('./commands')
+
+var I2CCMD    = 1
+var debugMode = false
+var i2c0Path  = '/dev/i2c-0'
+var i2c1Path  = '/dev/i2c-1'
+var bus
+var busNumber
+
+var initWait  = 1     // in seconds
+
+var isInit    = false
+var isHalt    = false
+var isBusy    = false
+
+var ADDRESS   = 0x04
+
+var onError, onInit
+
+function GrovePi(opts) {
+  this.BYTESLEN = 4
+  this.INPUT = 'input'
+  this.OUTPUT = 'output'
+
+  if (typeof opts == 'undefined')
+    opts = {}
+
+  if (typeof opts.debug != 'undefined')
+    this.debugMode = opts.debug
+  else
+    this.debugMode = debugMode
+
+  // TODO: Dispatch an error event instead
+  if (typeof opts.onError == 'function')
+    onError = opts.onError
+
+  // TODO: Dispatch a init event instead
+  if (typeof opts.onInit == 'function')
+    onInit = opts.onInit
+
+  if (fs.existsSync(i2c0Path)) {
+    isHalt = false
+    busNumber = 0
+  } else if (fs.existsSync(i2c1Path)) {
+    isHalt = false
+    busNumber = 1
+  } else {
+    var err = new Error('GrovePI could not determine your i2c device')
+    isHalt = true
+    if (typeof onError == 'function')
+      onError(err)
+    this.debug(err)
+  }
+}
+
+GrovePi.prototype.init = function() {
+  if (!isHalt) {
+    bus = i2c.openSync(busNumber)
+
+    if (!isInit) {
+      this.debug('GrovePi is initing')
+      sleep.sleep(initWait)
+      isInit = true
+
+      if (typeof onInit == 'function')
+        onInit(true)
+    } else {
+      var err = new Error('GrovePI is already initialized')
+      if (typeof onInit == 'function')
+        onInit(false)
+      onError(err)
+    }
+  } else {
+    var err = new Error('GrovePI cannot be initialized')
+    if (typeof onInit == 'function')
+      onInit(false)
+    onError(err)
+  }
+}
+GrovePi.prototype.close = function() {
+  if (typeof bus != 'undefined') {
+    this.debug('GrovePi is closing')
+    bus.closeSync()
+  } else {
+    this.debug('The device is not defined')
+  }
+}
+GrovePi.prototype.run = function(tasks) {
+  this.debug('GrovePi is about to execute ' + tasks.length + ' tasks')
+  async.waterfall(tasks)
+}
+GrovePi.prototype.checkStatus = function() {
+  if (!isInit || isHalt){
+    if (!isHalt) {
+      this.debug('GrovePi needs to be initialized.')
+    } else {
+      this.debug('GrovePi is not operative because halted')
+    }
+    return false
+  }
+  return true
+}
+GrovePi.prototype.readByte = function() {
+  var isOperative = this.checkStatus()
+  if (!isOperative)
+    return false
+
+  var length = 1
+  var buffer = new Buffer.alloc(length)
+  var ret = bus.i2cReadSync(ADDRESS, length, buffer)
+  return ret > 0 ? buffer : false
+}
+GrovePi.prototype.readBytes = function(length) {
+  if (typeof length == 'undefined')
+    length = this.BYTESLEN
+
+  var isOperative = this.checkStatus()
+  if (!isOperative)
+    return false
+
+  var buffer = new Buffer.alloc(length)
+  var ret = false
+  try {
+    var val = bus.i2cReadSync(ADDRESS, length, buffer)
+    ret = val > 0 ? buffer : false
+  } catch (err) {
+    ret = false
+  } finally {
+    return ret
+  }
+}
+GrovePi.prototype.writeBytes = function(bytes) {
+  var isOperative = this.checkStatus()
+  if (!isOperative)
+    return false
+
+  var buffer = new Buffer.from(bytes)
+  var ret = false
+  try {
+    var val = bus.i2cWriteSync(ADDRESS, buffer.length, buffer)
+    ret = val > 0 ? true : false
+  } catch (err) {
+    ret = false
+  } finally {
+    return ret
+  }
+}
+GrovePi.prototype.pinMode = function(pin, mode) {
+  var isOperative = this.checkStatus()
+  if (!isOperative)
+    return false
+
+  if (mode == this.OUTPUT) {
+    return this.writeBytes(commands.pMode.concat([pin, 1, commands.unused]))
+  } else if (mode == this.INPUT) {
+    return this.writeBytes(commands.pMode.concat([pin, 0, commands.unused]))
+  } else {
+    this.debug('Unknown pin mode')
+  }
+}
+GrovePi.prototype.debug = function(msg) {
+  if (this.debugMode)
+    log.info('GrovePi.board', msg)
+}
+GrovePi.prototype.wait = function(ms) {
+  sleep.usleep(1000 * ms)
+}
+
+// GrovePi functions
+GrovePi.prototype.version = function() {
+  var write = this.writeBytes(commands.version.concat([commands.unused, commands.unused, commands.unused]))
+  if (write) {
+    this.wait(100)
+    this.readByte()
+    var bytes = this.readBytes()
+    if (typeof bytes == 'object')
+      return (bytes[1] + '.' + bytes[2] + '.' + bytes[3])
+    else
+      return false
+  } else {
+    return false
+  }
+}
+
+// export the class
+module.exports = GrovePi

Software/NodeJS/libs/index.js

@@ -0,0 +1,32 @@
+module.exports.GrovePi = {
+    commands: require('./commands')
+  , board: require('./grovepi')
+  , sensors: {
+      base: {
+          Sensor: require('./sensors/base/sensor')
+        , Analog: require('./sensors/base/analogSensor')
+        , Digital: require('./sensors/base/digitalSensor')
+        , I2C: require('./sensors/base/i2cSensor')
+      }
+    , DigitalInput: require('./sensors/genericDigitalInputSensor')
+    , DigitalOutput: require('./sensors/genericDigitalOutputSensor')
+    , AccelerationI2C: require('./sensors/accelerationI2cSensor')
+    , AirQualityAnalog: require('./sensors/airQualityAnalogSensor')
+    , ChainableRGBLedDigital: require('./sensors/chainableRGBLedDigitalSensor')
+    , DHTDigital: require('./sensors/DHTDigitalSensor')
+    , FourDigitDigital: require('./sensors/fourDigitDigitalSensor')
+    , LedBarDigital: require('./sensors/ledBarDigitalSensor')
+    , LightAnalog: require('./sensors/lightAnalogSensor')
+    , RTCI2C: require('./sensors/rtcI2cSensor')
+    , TemperatureAnalog: require('./sensors/temperatureAnalogSensor')
+    , UltrasonicDigital: require('./sensors/ultrasonicDigitalSensor')
+    , IRReceiver: require('./sensors/IRReceiverSensor')
+    , SPDTRelay: require('./sensors/SPDTRelay')
+    , dustDigital: require('./sensors/dustDigitalSensor')
+    , encoderDigital: require('./sensors/encoderDigitalSensor')
+    , waterFlowDigital: require('./sensors/waterFlowDigitalSensor')
+    , DigitalButton: require('./sensors/digitalButton')
+    , LoudnessAnalog: require('./sensors/loudnessAnalogSensor')     
+    , RotaryAnalog: require('./sensors/rotaryAngleAnalogSensor')
+  }
+}

Software/NodeJS/libs/package.json

@@ -0,0 +1,27 @@
+{
+    "name": "node-grovepi",
+    "version": "2.2.0",
+    "description": "GrovePi library for Node.js",
+    "keywords": ["grovepi", "robot", "gpio", "i2c"],
+    "dependencies": {
+        "async": "1.*",
+        "i2c-bus": "1.*",
+        "npmlog": "2.*",
+        "sleep": "3.*",
+        "mathjs": "3.17.*"
+    },
+    "main": "index.js",
+    "scripts": {
+        "test": "echo \"Error: no test specified\" && exit 1"
+    },
+    "repository": {
+        "type": "git",
+        "url": "git://github.com/marcellobarile/GrovePi.git"
+    },
+    "author": "Marcello Barile <marcello.barile@gmail.com> (http://www.barile.eu)",
+    "license": "MIT",
+    "bugs": {
+        "url": "https://github.com/marcellobarile/GrovePi/issues"
+    },
+    "homepage": "https://github.com/marcellobarile/GrovePi"
+}

Software/NodeJS/libs/sensors/DHTDigitalSensor.js

@@ -0,0 +1,92 @@
+var DigitalSensor = require('./base/digitalSensor')
+var commands     = require('../commands')
+
+function DHTDigitalSensor(pin, moduleType, scale) {
+  DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+  this.moduleType = moduleType
+  this.scale = scale
+}
+function convertCtoF(temp) {
+  return temp * 9 / 5 + 32
+}
+function convertFtoC(temp) {
+  return (temp - 32) * 5 / 9
+}
+function getHeatIndex(temp, hum, scale) {
+  // http://www.wpc.ncep.noaa.gov/html/heatindex_equation.shtml
+  var needsConversion = typeof scale == 'undefined' || scale == DHTDigitalSensor.CELSIUS
+
+  temp = needsConversion ? convertCtoF(temp) : temp
+
+  // Steadman's result
+  var heatIndex = 0.5 * (temp + 61 + (temp - 68) * 1.2 + hum * 0.094)
+
+  // regression equation of Rothfusz is appropriate
+  if (temp >= 80) {
+      var heatIndexBase = (-42.379                                  +
+                            2.04901523  * temp                      +
+                            10.14333127               * hum         +
+                            -0.22475541 * temp        * hum         +
+                            -0.00683783 * temp * temp               +
+                            -0.05481717               * hum * hum   +
+                            0.00122874  * temp * temp * hum         +
+                            0.00085282  * temp        * hum * hum   +
+                            -0.00000199 * temp * temp * hum * hum   )
+      // adjustment
+      if (hum < 13 && temp <= 112) {
+          heatIndex = heatIndexBase - (13 - hum) / 4 * Math.sqrt((17 - Math.abs(temp - 95)) / 17)
+      } else if (hum > 85 && temp <= 87) {
+          heatIndex = heatIndexBase + ((hum - 85) / 10) * ((87 - temp) / 5)
+      } else {
+          heatIndex = heatIndexBase
+      }
+  }
+  
+  return needsConversion ? convertFtoC(heatIndex) : heatIndex
+}
+
+DHTDigitalSensor.prototype = new DigitalSensor()
+DHTDigitalSensor.VERSION = {
+    'DHT11' : 0
+  , 'DHT22' : 1
+  , 'DHT21' : 2
+  , 'AM2301': 3
+}
+DHTDigitalSensor.CELSIUS = 'c'
+DHTDigitalSensor.FAHRENHEIT = 'f'
+
+DHTDigitalSensor.prototype.read = function() {
+  var write = this.board.writeBytes(commands.dht_temp.concat([this.pin, this.moduleType, commands.unused]))
+  if (write) {
+    this.board.wait(500)
+    this.board.readByte()
+    this.board.wait(200)
+    var bytes = this.board.readBytes(9)
+    if (bytes instanceof Buffer) {
+      var hex
+      var tempBytes = bytes.slice(1, 5).reverse()
+      var humBytes = bytes.slice(5, 9).reverse()
+
+      hex = '0x' + tempBytes.toString('hex')
+      var temp = (hex & 0x7fffff | 0x800000) * 1.0 / Math.pow(2, 23) * Math.pow(2, ((hex >> 23 & 0xff) - 127))
+      temp = +(Number(parseFloat(temp - 0.5).toFixed(2)))
+      if (this.scale == DHTDigitalSensor.FAHRENHEIT) {
+        temp = convertCtoF(temp)
+      }
+
+      hex = '0x' + humBytes.toString('hex')
+      var hum = (hex & 0x7fffff | 0x800000) * 1.0 / Math.pow(2, 23) * Math.pow(2, ((hex >> 23 & 0xff) - 127))
+      hum = +(Number(parseFloat(hum - 2).toFixed(2)))
+
+      var heatIndex = +(Number(parseFloat(getHeatIndex(temp, hum, this.scale)).toFixed(2)))
+      // From: https://github.com/adafruit/DHT-sensor-library/blob/master/DHT.cpp
+
+      return [temp, hum, heatIndex]
+    } else
+      return false
+  } else {
+    return false
+  }
+}
+
+module.exports = DHTDigitalSensor

Software/NodeJS/libs/sensors/IRReceiverSensor.js

@@ -0,0 +1,33 @@
+var util         = require('util')
+var Sensor       = require('./base/sensor')
+var commands     = require('../commands')
+
+function IRReceiverSensor(pin) {
+  Sensor.apply(this, Array.prototype.slice.call(arguments))
+  this.pin = pin + 1
+}
+util.inherits(IRReceiverSensor, Sensor);
+IRReceiverSensor.prototype = new IRReceiverSensor()
+
+IRReceiverSensor.prototype.read = function() {
+  this.write(commands.unused)
+  var writeRet = this.board.writeBytes(commands.irRead.concat([commands.unused, commands.unused, commands.unused]))
+  if (writeRet) {
+    this.board.wait(100)
+    this.board.readByte()
+    var bytes = this.board.readBytes(22)
+    if (bytes instanceof Buffer && bytes[1] != 255) {
+      bytes.slice(0,1)
+      return bytes
+    } else {
+      return false
+    }
+  } else {
+    return false
+  }
+}
+IRReceiverSensor.prototype.write = function(value) {
+  return this.board.writeBytes(commands.irRecvPin.concat([this.pin, value, commands.unused]))
+}
+
+module.exports = IRReceiverSensor

Software/NodeJS/libs/sensors/SPDTRelay.js

@@ -0,0 +1,29 @@
+var DigitalSensor = require('./base/digitalSensor'),
+    commands = require('../commands')
+
+function SPDTRelay(pin) {
+    DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+SPDTRelay.prototype = new DigitalSensor()
+
+SPDTRelay.prototype.on = function () {
+    this.board.pinMode(this.board.OUTPUT)
+    var write = this.board.writeBytes(commands.dWrite.concat([this.pin, 1, commands.unused]))
+    if (write) {
+        return true
+    } else {
+        return false
+    }
+}
+
+SPDTRelay.prototype.off = function () {
+    this.board.pinMode(this.board.OUTPUT)
+    var write = this.board.writeBytes(commands.dWrite.concat([this.pin, 0, commands.unused]))
+    if (write) {
+        return true
+    } else {
+        return false
+    }
+}
+
+module.exports = SPDTRelay

Software/NodeJS/libs/sensors/accelerationI2cSensor.js

@@ -0,0 +1,29 @@
+var util       = require('util')
+var I2cSensor  = require('./base/i2cSensor')
+var commands   = require('../commands')
+
+function AccelerationI2cSensor() {
+  I2cSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+AccelerationI2cSensor.prototype = new I2cSensor()
+
+AccelerationI2cSensor.prototype.read = function() {
+  var write = this.board.writeBytes(commands.acc_xyz.concat([commands.unused, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(100)
+    this.board.readByte()
+    var bytes = this.board.readBytes()
+    if (bytes instanceof Buffer) {
+      var x = bytes[1] > 32 ? -(bytes[1]-224) : bytes[1]
+      var y = bytes[2] > 32 ? -(bytes[2]-224) : bytes[2]
+      var z = bytes[3] > 32 ? -(bytes[3]-224) : bytes[3]
+      return [x, y, z]
+    } else {
+      return false
+    }
+  } else {
+    return false
+  }
+}
+
+module.exports = AccelerationI2cSensor

Software/NodeJS/libs/sensors/airQualityAnalogSensor.js

@@ -0,0 +1,14 @@
+var AnalogSensor = require('./base/analogSensor')
+var commands     = require('../commands')
+
+function AirQualityAnalogSensor(pin) {
+  AnalogSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+AirQualityAnalogSensor.prototype = new AnalogSensor()
+
+AirQualityAnalogSensor.prototype.read = function() {
+  var res = AnalogSensor.prototype.read.call(this)
+  return parseInt(res)
+}
+
+module.exports = AirQualityAnalogSensor

Software/NodeJS/libs/sensors/base/analogSensor.js

@@ -0,0 +1,33 @@
+var util         = require('util')
+var Sensor       = require('./sensor')
+var commands     = require('../../commands')
+
+function AnalogSensor(pin) {
+  Sensor.apply(this, Array.prototype.slice.call(arguments))
+  this.pin = pin
+}
+util.inherits(AnalogSensor, Sensor)
+AnalogSensor.prototype = new AnalogSensor()
+
+AnalogSensor.prototype.read = function(length) {
+  if (typeof length == 'undefined')
+    length = this.board.BYTESLEN
+
+  var writeRet = this.board.writeBytes(commands.aRead.concat([this.pin, commands.unused, commands.unused]))
+  if (writeRet) {
+    this.board.readByte()
+    var bytes = this.board.readBytes(length)
+    if (bytes instanceof Buffer) {
+      return bytes[1] * 256 + bytes[2]
+    } else {
+      return false
+    }
+  } else {
+    return false
+  }
+}
+AnalogSensor.prototype.write = function(value) {
+  return this.board.writeBytes(commands.aWrite.concat([this.pin, value, commands.unused]))
+}
+
+module.exports = AnalogSensor

Software/NodeJS/libs/sensors/base/digitalSensor.js

@@ -0,0 +1,25 @@
+var util         = require('util')
+var Sensor       = require('./sensor')
+var commands     = require('../../commands')
+
+function DigitalSensor(pin) {
+  Sensor.apply(this, Array.prototype.slice.call(arguments))
+  this.pin = pin
+}
+util.inherits(DigitalSensor, Sensor)
+DigitalSensor.prototype = new DigitalSensor()
+
+DigitalSensor.prototype.read = function() {
+  var writeRet = this.board.writeBytes(commands.dRead.concat([this.pin, commands.unused, commands.unused]))
+  if (writeRet) {
+    this.board.wait(100)
+    return this.board.readBytes(2)[1]
+  } else {
+    return false
+  }
+}
+DigitalSensor.prototype.write = function(value) {
+  return this.board.writeBytes(commands.dWrite.concat([this.pin, value, commands.unused]))
+}
+
+module.exports = DigitalSensor

Software/NodeJS/libs/sensors/base/i2cSensor.js

@@ -0,0 +1,11 @@
+var util         = require('util')
+var Sensor       = require('./sensor')
+var commands     = require('../../commands')
+
+function I2cSensor() {
+  Sensor.apply(this, Array.prototype.slice.call(arguments))
+}
+util.inherits(I2cSensor, Sensor)
+I2cSensor.prototype = new I2cSensor()
+
+module.exports = I2cSensor

Software/NodeJS/libs/sensors/base/sensor.js

@@ -0,0 +1,67 @@
+var util         = require('util')
+var EventEmitter = require('events').EventEmitter
+var Board        = require('../../grovepi')
+
+var isEqual = function(a, b) {
+  if (typeof a == 'object') {
+    for (var i in a) {
+      if (a[i] !== b[i]) {
+        return false
+      }
+    }
+    return true
+  } else {
+    return a === b
+  }
+}
+
+function Sensor() {
+  this.board = new Board()
+  this.lastValue = 0
+  this.currentValue = 0
+  this.streamInterval = this.watchInterval = undefined
+  this.watchDelay = 100
+}
+
+util.inherits(Sensor, EventEmitter)
+
+Sensor.prototype.read = function() {}
+Sensor.prototype.write = function() {}
+Sensor.prototype.stream = function(delay, cb) {
+  var self = this
+  delay = typeof delay == 'undefined' ? self.watchDelay : delay
+
+  self.stopStream()
+  self.streamInterval = setInterval(function onStreamInterval() {
+    var res = self.read()
+    cb(res)
+  }, delay)
+}
+Sensor.prototype.stopStream = function() {
+  var self = this
+  if (typeof self.streamInterval != 'undefined')
+    clearInterval(self.streamInterval)
+}
+
+Sensor.prototype.watch = function(delay) {
+  var self = this
+  delay = typeof delay == 'undefined' ? self.watchDelay : delay
+
+  self.stopWatch()
+  self.watchInterval = setInterval(function onInterval() {
+    var res = self.read()
+
+    self.lastValue = self.currentValue
+    self.currentValue = res
+
+    if (!isEqual(self.currentValue, self.lastValue))
+      self.emit('change', self.currentValue)
+  }, delay)
+}
+Sensor.prototype.stopWatch = function() {
+  var self = this
+  if (typeof self.watchInterval != 'undefined')
+    clearInterval(self.watchInterval)
+}
+
+module.exports = Sensor

Software/NodeJS/libs/sensors/chainableRGBLedDigitalSensor.js

@@ -0,0 +1,52 @@
+var DigitalSensor = require('./base/digitalSensor')
+var commands     = require('../commands')
+
+function ChainableRGBLedDigitalSensor(pin, numLeds) {
+  DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+  this.numLeds
+}
+ChainableRGBLedDigitalSensor.prototype = new DigitalSensor()
+
+ChainableRGBLedDigitalSensor.prototype.init = function() {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.chainableRgbLedInit.concat([this.pin, this.numLeds, commands.unused]))
+  if (write) {
+    this.board.wait(500)
+    return true
+  } else {
+    return false
+  }
+}
+ChainableRGBLedDigitalSensor.prototype.setPattern = function(pattern, whichLed) {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.chainableRgbLedSetPattern.concat([this.pin, pattern, whichLed]))
+  if (write) {
+    this.board.wait(500)
+    return true
+  } else {
+    return false
+  }
+}
+ChainableRGBLedDigitalSensor.prototype.setModulo = function(offset, divisor) {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.chainableRgbLedSetModulo.concat([this.pin, offset, divisor]))
+  if (write) {
+    this.board.wait(500)
+    return true
+  } else {
+    return false
+  }
+}
+ChainableRGBLedDigitalSensor.prototype.setLevel = function(level, reverse) {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.chainableRgbLedSetLevel.concat([this.pin, level, reverse]))
+  if (write) {
+    this.board.wait(500)
+    return true
+  } else {
+    return false
+  }
+}
+
+
+module.exports = ChainableRGBLedDigitalSensor

Software/NodeJS/libs/sensors/digitalButton.js

@@ -0,0 +1,46 @@
+var DigitalInput = require('./base/digitalSensor')
+
+const buttonMode = {
+    UP: 0,
+    DOWN: 1
+}
+
+var mode = buttonMode.UP //not pressed
+
+var pressedDateTime
+var currentDateTime
+var milliseconds
+
+//digital button, can throw singlepress and longpress events
+function DigitalButton(pin, longPressDelay) {
+    DigitalInput.apply(this, Array.prototype.slice.call(arguments))
+    this.longPressDelay = longPressDelay || 1100
+    this.on('change', function (res) {
+        //user presses the button for the first time
+        if (res == 1 && mode === buttonMode.UP) {
+            pressedDateTime = new Date()
+            mode = buttonMode.DOWN
+            return
+        }
+        //user continues to press the button
+        else if (res == 1 && mode === buttonMode.DOWN) {
+            //do nothing
+            return
+        } else { //res == 0 so user has lifted her finger
+            currentDateTime = new Date()
+            milliseconds = currentDateTime.getTime() - pressedDateTime.getTime()
+            //if less than longPressDelay milliseconds
+            if (milliseconds <= this.longPressDelay) {
+                this.emit('down', 'singlepress')
+            } else {
+                this.emit('down', 'longpress')
+            }
+            //reset the mode
+            mode = buttonMode.UP
+        }
+    });
+}
+
+DigitalButton.prototype = new DigitalInput()
+
+module.exports = DigitalButton

Software/NodeJS/libs/sensors/dustDigitalSensor.js

@@ -0,0 +1,85 @@
+// TODO: call disable function on exit
+var DigitalSensor = require('./base/digitalSensor')
+var commands = require('../commands')
+var helpers = require('./helpers')
+
+function DustDigitalSensor(pin) {
+  DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+  this.results = new Array()
+}
+DustDigitalSensor.prototype = new DigitalSensor()
+
+DustDigitalSensor.prototype.read = function () {
+  var write = this.board.writeBytes(commands.dustSensorRead.concat([this.pin, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    var bytes = this.board.readBytes()
+    //console.log(bytes[0] + ' ' + bytes[1] + ' ' + bytes[2] + ' ' + bytes[3])
+    if (bytes instanceof Buffer && bytes[0] != 0)
+      return [bytes[0], (bytes[3] * 256 * 256 + bytes[2] * 256 + bytes[1])]
+    else
+      return false
+  } else {
+    return false
+  }
+}
+DustDigitalSensor.prototype.enable = function () {
+  var write = this.board.writeBytes(commands.dustSensorEn.concat([commands.unused, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    return true
+  } else {
+    return false
+  }
+}
+DustDigitalSensor.prototype.disable = function () {
+  var write = this.board.writeBytes(commands.dustSensorDis.concat([commands.unused, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    return true
+  } else {
+    return false
+  }
+}
+
+DustDigitalSensor.prototype.start = function () {
+    if (!this.enable())
+        throw new Error('cannot enable dust sensor')
+    this.enable()
+    setInterval(loop.bind(this), 30 * 1000) //every 30 seconds
+}
+
+DustDigitalSensor.prototype.stop = function () {
+    this.disable()
+    clearInterval(loop)
+}
+
+function loop() {
+    let currentResult = this.read()
+    this.results.push(currentResult[1])
+}
+
+DustDigitalSensor.prototype.readAvgMax = function () {
+
+    if (this.results.length === 0) return {
+        avg: helpers.NOT_AVAILABLE,
+        max: helpers.NOT_AVAILABLE
+    };
+
+    let sum = this.results.reduce((acc, cur) => acc + cur, 0)
+    let avg = sum / this.results.length
+
+    let max = this.results.reduce(function (a, b) {
+        return Math.max(a, b)
+    });
+
+    //reset the array
+    this.results = new Array()
+
+    return {
+        avg: helpers.round(avg, 2),
+        max: helpers.round(max, 2)
+    };
+}
+
+module.exports = DustDigitalSensor

Software/NodeJS/libs/sensors/encoderDigitalSensor.js

@@ -0,0 +1,43 @@
+// TODO: call disable function on exit
+var DigitalSensor = require('./base/digitalSensor')
+var commands     = require('../commands')
+
+function EncoderDigitalSensor(pin) {
+  DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+EncoderDigitalSensor.prototype = new DigitalSensor()
+
+EncoderDigitalSensor.prototype.read = function() {
+  var write = this.board.writeBytes(commands.encoderRead.concat([this.pin, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    this.board.readByte()
+    var bytes = this.board.readBytes()
+    if (bytes instanceof Buffer && bytes[1] != 255)
+      return [bytes[1], bytes[2]]
+    else
+      return false
+  } else {
+    return false
+  }
+}
+EncoderDigitalSensor.prototype.enable = function() {
+  var write = this.board.writeBytes(commands.encoderEn.concat([commands.unused, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    return true
+  } else {
+    return false
+  }
+}
+EncoderDigitalSensor.prototype.disable = function() {
+  var write = this.board.writeBytes(commands.encoderDis.concat([commands.unused, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    return true
+  } else {
+    return false
+  }
+}
+
+module.exports = EncoderDigitalSensor

Software/NodeJS/libs/sensors/fourDigitDigitalSensor.js

@@ -0,0 +1,97 @@
+var DigitalSensor = require('./base/digitalSensor')
+var commands     = require('../commands')
+
+function FourDigitDigitalSensor(pin) {
+  DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+FourDigitDigitalSensor.prototype = new DigitalSensor()
+
+FourDigitDigitalSensor.prototype.init = function() {
+  this.board.pinMode(this.board.OUTPUT)
+  return this.board.writeBytes(commands.fourDigitInit.concat([this.pin, commands.unused, commands.unused]))
+}
+FourDigitDigitalSensor.prototype.setNumber = function(value, useLeadingZero) {
+  this.board.pinMode(this.board.OUTPUT)
+  var byte1 = value & 255
+  var byte2 = value >> 8
+  var command = useLeadingZero ? commands.fourDigitValue : commands.fourDigitValueZeros
+  var write = this.board.writeBytes(command.concat([this.pin, byte1, byte2]))
+  if (write) {
+    this.board.wait(500)
+    return true
+  } else {
+    return false
+  }
+}
+FourDigitDigitalSensor.prototype.setBrightness = function(brightness) {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.fourDigitBrightness.concat([this.pin, brightness, commands.unused]))
+  if (write) {
+    this.board.wait(500)
+    return true
+  } else {
+    return false
+  }
+}
+FourDigitDigitalSensor.prototype.setDigit = function(segment, value) {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.fourDigitIndividualDigit.concat([this.pin, segment, value]))
+  if (write) {
+    this.board.wait(500)
+    return true
+  } else {
+    return false
+  }
+}
+FourDigitDigitalSensor.prototype.setSegment = function(segment, leds) {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.fourDigitIndividualLeds.concat([this.pin, segment, leds]))
+  if (write) {
+    this.board.wait(500)
+    return true
+  } else {
+    return false
+  }
+}
+FourDigitDigitalSensor.prototype.setScore = function(left, right) {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.fourDigitScore.concat([this.pin, left, right]))
+  if (write) {
+    this.board.wait(500)
+    return true
+  } else {
+    return false
+  }
+}
+FourDigitDigitalSensor.prototype.monitor = function(analog, duration) {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.fourDigitAnalogRead.concat([this.pin, analog, duration]))
+  if (write) {
+    this.board.wait(duration/1000 + 500) // TODO: This should be tested
+    return true
+  } else {
+    return false
+  }
+}
+FourDigitDigitalSensor.prototype.on = function() {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.fourDigitAllOn.concat([this.pin, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(500)
+    return true
+  } else {
+    return false
+  }
+}
+FourDigitDigitalSensor.prototype.off = function() {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.fourDigitAllOff.concat([this.pin, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(500)
+    return true
+  } else {
+    return false
+  }
+}
+
+module.exports = FourDigitDigitalSensor

Software/NodeJS/libs/sensors/genericDigitalInputSensor.js

@@ -0,0 +1,14 @@
+// Thanks to Craig Watkins for the contribution
+var DigitalSensor = require('./base/digitalSensor')
+var commands      = require('../commands')
+
+function GenericDigitalInputSensor(pin) {
+  DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+GenericDigitalInputSensor.prototype = new DigitalSensor()
+
+GenericDigitalInputSensor.prototype.read = function() {
+    return DigitalSensor.prototype.read.call(this)
+}
+
+module.exports = GenericDigitalInputSensor

Software/NodeJS/libs/sensors/genericDigitalOutputSensor.js

@@ -0,0 +1,30 @@
+// Thanks to Craig Watkins for the contribution
+var DigitalSensor = require('./base/digitalSensor')
+var commands      = require('../commands')
+
+function GenericDigitalOutputSensor(pin) {
+  DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+GenericDigitalOutputSensor.prototype = new DigitalSensor()
+
+GenericDigitalOutputSensor.prototype.turnOn = function() {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.dWrite.concat([this.pin, 1, commands.unused]))
+  if (write) {
+    return true
+  } else {
+    return false
+  }
+}
+
+GenericDigitalOutputSensor.prototype.turnOff = function() {
+  this.board.pinMode(this.board.OUTPUT)
+  var write = this.board.writeBytes(commands.dWrite.concat([this.pin, 0, commands.unused]))
+  if (write) {
+      return true
+  } else {
+      return false
+  }
+}
+
+module.exports = GenericDigitalOutputSensor

Software/NodeJS/libs/sensors/helpers.js

@@ -0,0 +1,16 @@
+function round(number, precision) {
+    if (isNaN(number)) return NOT_AVAILABLE
+    if (precision == undefined || isNaN(precision))
+        precision = 2
+    var factor = Math.pow(10, precision)
+    var tempNumber = number * factor
+    var roundedTempNumber = Math.round(tempNumber)
+    return roundedTempNumber / factor
+}
+
+const NOT_AVAILABLE = 'N/A'
+
+module.exports = {
+    round,
+    NOT_AVAILABLE
+}

Software/NodeJS/libs/sensors/ledBarDigitalSensor.js

@@ -0,0 +1,56 @@
+var DigitalSensor = require('./base/digitalSensor')
+var commands     = require('../commands')
+
+function LedBarDigitalSensor(pin, orientation) {
+  DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+  this.orientation = orientation
+  this.level = 0
+}
+LedBarDigitalSensor.prototype = new DigitalSensor()
+
+LedBarDigitalSensor.prototype.init = function() {
+  return this.setOrientation(this.orientation)
+}
+LedBarDigitalSensor.prototype.setOrientation = function(orientation) {
+  this.board.pinMode(this.board.OUTPUT)
+  this.orientation = orientation
+  return this.board.writeBytes(commands.ledBarInit.concat([this.pin, this.orientation, commands.unused]))
+}
+LedBarDigitalSensor.prototype.setLevel = function(level) {
+  this.board.pinMode(this.board.OUTPUT)
+  this.level = level
+  return this.board.writeBytes(commands.ledBarLevel.concat([this.pin, this.level, commands.unused]))
+}
+LedBarDigitalSensor.prototype.setLed = function(led, state) {
+  this.board.pinMode(this.board.OUTPUT)
+  return this.board.writeBytes(commands.ledBarSetOne.concat([this.pin, led, state]))
+}
+LedBarDigitalSensor.prototype.toggleLed = function(led) {
+  this.board.pinMode(this.board.OUTPUT)
+  return this.board.writeBytes(commands.ledBarToggleOne.concat([this.pin, led, commands.unused]))
+}
+LedBarDigitalSensor.prototype.setBits = function(led, state) {
+  this.board.pinMode(this.board.OUTPUT)
+  var byte1 = state & 255
+  var byte2 = state >> 8
+  return this.board.writeBytes(commands.ledBarSet.concat([this.pin, byte1, byte2]))
+}
+LedBarDigitalSensor.prototype.getBits = function() {
+  this.board.pinMode(this.board.OUTPUT)
+  var byte1 = state & 255
+  var byte2 = state >> 8
+  var write = this.board.writeBytes(commands.ledBarGet.concat([this.pin, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    this.board.readByte()
+    var bytes = this.board.readBytes()
+    if (bytes instanceof Buffer)
+      return (bytes[1] ^ (bytes[2] << 8))
+    else
+      return false
+  } else {
+    return false
+  }
+}
+
+module.exports = LedBarDigitalSensor

Software/NodeJS/libs/sensors/lightAnalogSensor.js

@@ -0,0 +1,16 @@
+var AnalogSensor = require('./base/analogSensor')
+var commands     = require('../commands')
+
+function LightAnalogSensor(pin) {
+  AnalogSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+LightAnalogSensor.prototype = new AnalogSensor()
+
+LightAnalogSensor.prototype.read = function() {
+  var res = AnalogSensor.prototype.read.call(this)
+  var number = parseInt(res)
+  var resistance = number <= 0 ? 0 : +(Number(parseFloat((1023 - number) * 10 / number)).toFixed(2))
+  return resistance
+}
+
+module.exports = LightAnalogSensor

Software/NodeJS/libs/sensors/loudnessAnalogSensor.js

@@ -0,0 +1,48 @@
+var AnalogSensor = require('./base/analogSensor')
+
+//same class can be used for the sound sensor
+function LoudnessAnalogSensor(pin, samplespersecond) {
+    AnalogSensor.apply(this, Array.prototype.slice.call(arguments))
+    this.samplespersecond = samplespersecond || 5
+    this.results = new Array()
+}
+LoudnessAnalogSensor.prototype = new AnalogSensor()
+
+//returns loudness average and max for values taken since the last time it was called
+LoudnessAnalogSensor.prototype.readAvgMax = function () {
+    if (this.results.length == 0)
+        throw new Error('no results. Did you call start()?')
+
+    //reduce values to get the sum
+    let sum = this.results.reduce((acc, cur) => acc + cur, 0)
+    let avg = sum / this.results.length
+
+    //reduce the values to get the max
+    let max = this.results.reduce(function (a, b) {
+        return Math.max(a, b)
+    })
+
+    //reset the array - clear its elements
+    this.results = new Array()
+
+    return {
+        avg,
+        max
+    }
+}
+
+LoudnessAnalogSensor.prototype.start = function () {
+    loop.bind(this)() //so we can use 'this' inside the loop method
+    setInterval(loop.bind(this), 1000 / this.samplespersecond)
+}
+
+LoudnessAnalogSensor.prototype.stop = function () {
+    clearInterval(loop)
+}
+
+function loop() {
+    let currentResult = this.read()
+    this.results.push(currentResult)
+}
+
+module.exports = LoudnessAnalogSensor

Software/NodeJS/libs/sensors/rotaryAngleAnalogSensor.js

@@ -0,0 +1,74 @@
+var AnalogSensor = require('./base/analogSensor')
+var helpers = require('./helpers')
+const FULL_ANGLE = 300
+
+//RotaryAngleSensor
+//returns a value from 0 to 100
+//implemented a basic noise filtering algorithm, as in our experiments
+//the rotary sensor was throwing random values at random times
+function RotaryAngleAnalogSensor(pin, watchDelay, samplesize) {
+    AnalogSensor.apply(this, Array.prototype.slice.call(arguments))
+    this.watchDelay = watchDelay || 10
+    this.samplesize = samplesize || 40
+    //watchDelay * samplesize equals the miliseconds interval that the sensor will report data
+}
+RotaryAngleAnalogSensor.prototype = new AnalogSensor()
+
+RotaryAngleAnalogSensor.prototype.read = function () {
+    let value = AnalogSensor.prototype.read.call(this)
+    
+    let degrees = convertDHTToDegrees(value)
+
+    //Calculate result (0 to 100) from degrees(0 to 300)
+    let result = Math.floor(degrees / FULL_ANGLE * 100)
+
+    return result
+}
+
+const convertDHTToDegrees = function (value) {
+    //http://wiki.seeed.cc/Grove-Rotary_Angle_Sensor/
+    let adc_ref = 5
+    let grove_vcc = 5
+  
+    let voltage = helpers.round((value) * adc_ref / 1023, 2)
+
+    //Calculate rotation in degrees(0 to 300)
+    return helpers.round((voltage * FULL_ANGLE) / grove_vcc, 2)
+}
+
+RotaryAngleAnalogSensor.prototype.start = function () {
+    setInterval(loop.bind(this), this.watchDelay)
+}
+
+RotaryAngleAnalogSensor.prototype.stop = function () {
+    clearInterval(loop)
+}
+
+//new array initialized to zero
+let temp = Array.apply(null, Array(101)).map(Number.prototype.valueOf, 0) //0..100
+let timesRun = 0
+
+let previousData = null
+
+function loop() {
+    const reading = this.read()
+    if (reading < 0 || reading > 100) throw new Error('improper reading')
+
+    temp[reading]++
+    if (++timesRun === this.samplesize) {
+        //find the index of the biggest integer
+        const result = temp.indexOf(Math.max(...temp))
+        timesRun = 0
+        //reset the array
+        temp = Array.apply(null, Array(101)).map(Number.prototype.valueOf, 0)
+        
+        //compare current data to previous data
+        if (previousData === null || Math.abs(result - previousData) != 0) {
+            //there is a new value
+            this.emit('data', result)
+            previousData = result
+        }
+    }
+}
+
+module.exports = RotaryAngleAnalogSensor

Software/NodeJS/libs/sensors/rtcI2cSensor.js

@@ -0,0 +1,20 @@
+var I2cSensor  = require('./base/i2cSensor')
+var commands   = require('../commands')
+
+function RtcI2cSensor() {
+  I2cSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+RtcI2cSensor.prototype = new I2cSensor()
+
+RtcI2cSensor.prototype.read = function() {
+  var write = this.board.writeBytes(commands.rtc_getTime.concat([commands.unused, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(100)
+    this.board.readByte()
+    return this.board.readBytes()
+  } else {
+    return false
+  }
+}
+
+module.exports = RtcI2cSensor

Software/NodeJS/libs/sensors/temperatureAnalogSensor.js

@@ -0,0 +1,15 @@
+var AnalogSensor = require('./base/analogSensor')
+var commands     = require('../commands')
+
+function TemperatureAnalogSensor(pin) {
+  AnalogSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+TemperatureAnalogSensor.prototype = new AnalogSensor()
+
+TemperatureAnalogSensor.prototype.read = function() {
+  var res = AnalogSensor.prototype.read.call(this)
+  var resistance = (1023-res) * 10000 / res
+  return (1 / (Math.log(resistance / 10000) / 3975 + 1 / 298.15) - 273.15)
+}
+
+module.exports = TemperatureAnalogSensor

Software/NodeJS/libs/sensors/ultrasonicDigitalSensor.js

@@ -0,0 +1,24 @@
+var DigitalSensor = require('./base/digitalSensor')
+var commands     = require('../commands')
+
+function UltrasonicDigitalSensor(pin) {
+  DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+UltrasonicDigitalSensor.prototype = new DigitalSensor()
+
+UltrasonicDigitalSensor.prototype.read = function() {
+  var write = this.board.writeBytes(commands.uRead.concat([this.pin, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    this.board.readByte()
+    var bytes = this.board.readBytes()
+    if (bytes instanceof Buffer)
+      return (bytes[1] * 256 + bytes[2])
+    else
+      return false
+  } else {
+    return false
+  }
+}
+
+module.exports = UltrasonicDigitalSensor

Software/NodeJS/libs/sensors/waterFlowDigitalSensor.js

@@ -0,0 +1,43 @@
+// TODO: call disable function on exit
+var DigitalSensor = require('./base/digitalSensor')
+var commands     = require('../commands')
+
+function WaterFlowDigitalSensor(pin) {
+  DigitalSensor.apply(this, Array.prototype.slice.call(arguments))
+}
+WaterFlowDigitalSensor.prototype = new DigitalSensor()
+
+WaterFlowDigitalSensor.prototype.read = function() {
+  var write = this.board.writeBytes(commands.flowRead.concat([this.pin, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    this.board.readByte()
+    var bytes = this.board.readBytes()
+    if (bytes instanceof Buffer && bytes[1] != 255)
+      return [bytes[1], (bytes[3] * 256 + bytes[2])]
+    else
+      return false
+  } else {
+    return false
+  }
+}
+WaterFlowDigitalSensor.prototype.enable = function() {
+  var write = this.board.writeBytes(commands.flowEn.concat([commands.unused, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    return true
+  } else {
+    return false
+  }
+}
+WaterFlowDigitalSensor.prototype.disable = function() {
+  var write = this.board.writeBytes(commands.flowDis.concat([commands.unused, commands.unused, commands.unused]))
+  if (write) {
+    this.board.wait(200)
+    return true
+  } else {
+    return false
+  }
+}
+
+module.exports = WaterFlowDigitalSensor

Software/NodeJS/tests/basicTest.js

@@ -0,0 +1,203 @@
+var GrovePi = require('../libs').GrovePi
+var Commands = GrovePi.commands
+var Board = GrovePi.board
+var AccelerationI2cSensor = GrovePi.sensors.AccelerationI2C
+var UltrasonicDigitalSensor = GrovePi.sensors.UltrasonicDigital
+var AirQualityAnalogSensor = GrovePi.sensors.AirQualityAnalog
+var DHTDigitalSensor = GrovePi.sensors.DHTDigital
+var LightAnalogSensor = GrovePi.sensors.LightAnalog
+var DigitalButtonSensor = GrovePi.sensors.DigitalButton
+var LoudnessAnalogSensor = GrovePi.sensors.LoudnessAnalog
+var RotaryAngleAnalogSensor = GrovePi.sensors.RotaryAnalog
+var DustDigitalSensor = GrovePi.sensors.dustDigital
+
+var board
+
+
+var testOptions = {
+  acceleration: false,
+  ultrasonic: false,
+  airQuality: false,
+  dhtDigital: false,
+  lightAnalog: false,
+  digitalButton: true,
+  loudnessAnalog: false,
+  rotaryAngle: true,
+  dust: true,
+  customAccelerationReading: false
+}
+
+function start() {
+  console.log('starting')
+
+  board = new Board({
+    debug: true,
+    onError: function (err) {
+      console.log('TEST ERROR')
+      console.log(err)
+    },
+    onInit: function (res) {
+      if (res) {
+
+        console.log('GrovePi Version :: ' + board.version())
+
+        if (testOptions.acceleration) {
+          var accSensor = new AccelerationI2cSensor()
+          // I2C sensor doesn't need to specify a port
+          // Acc. XYZ
+          console.log('Acceleration I2C Sensor (single read) :: ' + accSensor.read())
+          console.log('Acceleration I2C Sensor (start stream - 1sec delay)')
+          accSensor.stream(1000, function (res) {
+            console.log('Acceleration stream value=' + res)
+          })
+          console.log('Acceleration I2C Sensor (start watch)')
+          accSensor.on('change', function (res) {
+            console.log('Acceleration onChange value=' + res)
+          })
+          accSensor.watch()
+        }
+
+        if (testOptions.ultrasonic) {
+          var ultrasonicSensor = new UltrasonicDigitalSensor(3)
+          // Digital Port 3
+          // Ultrasonic Ranger
+          console.log('Ultrasonic Ranger Digital Sensor (start watch)')
+          ultrasonicSensor.on('change', function (res) {
+            console.log('Ultrasonic Ranger onChange value=' + res)
+          })
+          ultrasonicSensor.watch()
+        }
+
+        if (testOptions.airQuality) {
+          var airQualitySensor = new AirQualityAnalogSensor(1)
+          // Analog Port 1
+          // Air Quality Sensor
+          console.log('AirQuality Analog Sensor (start watch)')
+          airQualitySensor.on('change', function (res) {
+            console.log('AirQuality onChange value=' + res)
+          })
+          airQualitySensor.watch()
+        }
+
+        if (testOptions.dhtDigital) {
+          var dhtSensor = new DHTDigitalSensor(3, DHTDigitalSensor.VERSION.DHT22, DHTDigitalSensor.CELSIUS)
+          // Digital Port 3
+          // DHT Sensor
+          console.log('DHT Digital Sensor (start watch)')
+          dhtSensor.on('change', function (res) {
+            console.log('DHT onChange value=' + res)
+          })
+          dhtSensor.watch(500) // milliseconds
+        }
+
+        if (testOptions.lightAnalog) {
+          var lightSensor = new LightAnalogSensor(3)
+          // Analog Port 3
+          // Light Sensor
+          console.log('Light Analog Sensor (start watch)')
+          lightSensor.on('change', function (res) {
+            console.log('Light onChange value=' + res)
+          })
+          lightSensor.watch()
+        }
+
+        if (testOptions.loudnessAnalog) {
+          var loudnessSensor = new LoudnessAnalogSensor(2)
+          //Analog Port 2
+          // Loudness Sensor
+          console.log('Loudness Analog Sensor (start monitoring - reporting results every 10s)')
+          loudnessSensor.start()
+          setInterval(loudnessSensorGetAvgMax, 10000, loudnessSensor)
+        }
+
+        if (testOptions.digitalButton) {
+          var buttonSensor = new DigitalButtonSensor(4)
+          //Digital Port 4
+          // Button sensor
+          console.log('Digital Button Sensor (start watch)')
+          buttonSensor.on('down', function (res) {
+            //res will be either singlepress or longpress
+            console.log('Button onDown, data=' + res)
+          })
+          buttonSensor.watch()
+        }
+
+        if (testOptions.rotaryAngle) {
+          var rotaryAngleSensor = new RotaryAngleAnalogSensor(1)
+          //Analog Port 1
+          // Rotary Angle Sensor
+          console.log('Rotary Angle Sensor (start watch)')
+          rotaryAngleSensor.start()
+          rotaryAngleSensor.on('data', function (res) {
+            console.log('Rotary onData value=' + res)
+          })
+        }
+
+        if (testOptions.dust) {
+          var dustSensor = new DustDigitalSensor(2)
+          //digital port 2
+          // Dust Digital Sensor
+          console.log('Dust Digital Sensor (start monitoring - reporting results every 30s)')
+          //we must get results every 30 seconds
+          dustSensor.start()
+          setInterval(dustSensorGetAvgMax, 30 * 1000, dustSensor)
+        }
+
+        if (testOptions.customAccelerationReading) {
+          // Custom external reading
+          console.log('Custom external reading')
+          console.log('customAccelerationReading()::' + customAccelerationReading())
+        }
+      } else {
+        console.log('TEST CANNOT START')
+      }
+    }
+  })
+  board.init()
+}
+
+function loudnessSensorGetAvgMax(loudnessSensor) {
+  var res = loudnessSensor.readAvgMax()
+  console.log('Loudness avg value=' + res.avg + ' and max value=' + res.max)
+}
+
+function dustSensorGetAvgMax(dustSensor) {
+  var res = dustSensor.readAvgMax()
+  //avg and max will be the same in this test
+  //since we're gathering them over 30 seconds
+  //but that's the same pediod this loop runs
+  console.log('Dust avg value=' + res.avg + ' and max value=' + res.max)
+}
+
+function customAccelerationReading() {
+  var write = board.writeBytes(Commands.acc_xyz.concat([Commands.unused, Commands.unused, Commands.unused]))
+  if (write) {
+    board.wait(100)
+    board.readByte()
+    var bytes = board.readBytes()
+    if (bytes instanceof Buffer) {
+      var x = bytes[1] > 32 ? -(bytes[1] - 224) : bytes[1]
+      var y = bytes[2] > 32 ? -(bytes[2] - 224) : bytes[2]
+      var z = bytes[3] > 32 ? -(bytes[3] - 224) : bytes[3]
+      return [x, y, z]
+    } else {
+      return false
+    }
+  } else {
+    return false
+  }
+}
+
+function onExit(err) {
+  console.log('ending')
+  board.close()
+  process.removeAllListeners()
+  process.exit()
+  if (typeof err != 'undefined')
+    console.log(err)
+}
+
+// starts the test
+start()
+// catches ctrl+c event
+process.on('SIGINT', onExit)

Software/NodeJS/tests/led_blink.js

@@ -0,0 +1,62 @@
+var GrovePi = require('../libs').GrovePi
+
+// put led in port D3 
+var led = new GrovePi.sensors.DigitalOutput(3);
+
+// status will tell us if the led is on or off
+var status = 0;
+
+var board;
+
+function toggle() {
+
+    if (status == 0){
+        console.log("toggle off");
+        led.turnOff();
+        status = 1;
+    }
+    else {
+        console.log("toggle on");
+        led.turnOn();
+        status = 0;
+    }
+}
+
+function start() {
+  console.log('starting')
+
+  board = new GrovePi.board({
+    debug: true,
+    onError: function(err) {
+      console.log('TEST ERROR')
+    },
+      
+    onInit: function(res) {
+        console.log("OnInit");
+        if (res) {
+            // call toggle every second
+            setInterval(toggle, 1000)
+        }
+    }
+  })
+
+  board.init();
+} // end start()
+ 
+
+// called on Ctrl-C. 
+// close the board and clean up 
+function onExit(err) {
+  console.log('ending')
+  board.close()
+  process.removeAllListeners()
+  process.exit()
+  if (typeof err != 'undefined')
+    console.log(err)
+}
+
+// starts the test
+start()
+// catches ctrl+c event
+process.on('SIGINT', onExit)
+