first commit

Software/NodeJS/libs/sensors/waterFlowDigitalSensor.js

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+// 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