Dust sensor added. Thanks epierre.

Author: henrikekblad

libraries/MySensors/MyMessage.h

@@ -38,7 +38,8 @@ typedef enum {
 	V_RAINRATE, V_WIND, V_GUST, V_DIRECTION, V_UV, V_WEIGHT, V_DISTANCE,
 	V_IMPEDANCE, V_ARMED, V_TRIPPED, V_WATT, V_KWH, V_SCENE_ON, V_SCENE_OFF,
 	V_HEATER, V_HEATER_SW, V_LIGHT_LEVEL, V_VAR1, V_VAR2, V_VAR3, V_VAR4, V_VAR5,
-	V_UP, V_DOWN, V_STOP, V_IR_SEND, V_IR_RECEIVE, V_FLOW, V_VOLUME, V_LOCK_STATUS
+	V_UP, V_DOWN, V_STOP, V_IR_SEND, V_IR_RECEIVE, V_FLOW, V_VOLUME, V_LOCK_STATUS,
+	V_DUST_LEVEL
 } data;
 
 // Type of internal messages (for internal messages)
@@ -53,7 +54,7 @@ typedef enum {
 typedef enum {
 	S_DOOR, S_MOTION, S_SMOKE, S_LIGHT, S_DIMMER, S_COVER, S_TEMP, S_HUM, S_BARO, S_WIND,
 	S_RAIN, S_UV, S_WEIGHT, S_POWER, S_HEATER, S_DISTANCE, S_LIGHT_LEVEL, S_ARDUINO_NODE,
-	S_ARDUINO_REPEATER_NODE, S_LOCK, S_IR, S_WATER, S_AIR_QUALITY, S_CUSTOM
+	S_ARDUINO_REPEATER_NODE, S_LOCK, S_IR, S_WATER, S_AIR_QUALITY, S_CUSTOM, S_DUST
 } sensor;
 
 // Type of data stream  (for streamed message)

libraries/MySensors/examples/DustSensor/DustSensor.ino

@@ -0,0 +1,80 @@
+/*
+  Arduino Dust Sensort
+
+  connect the sensor as follows :
+
+  VCC       >>> 5V
+  A         >>> A0
+  GND       >>> GND
+
+  Based on: http://www.dfrobot.com/wiki/index.php/Sharp_GP2Y1010AU 
+  Authors: Cyrille Médard de Chardon (serialC), Christophe Trefois (Trefex)
+  Contribution: epierre
+  COnverted to 1.4 by Henrik Ekblad
+  
+  The dust sensor used (see purchase guide for latest link):
+  http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575069610&toolid=10001&campid=5337433187&customid=&icep_item=171259125886&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
+  
+*/
+
+#include <MySensor.h>  
+#include <SPI.h>
+
+#define CHILD_ID_DUST 0
+#define DUST_SENSOR_ANALOG_PIN 1
+
+unsigned long SLEEP_TIME = 30*1000; // Sleep time between reads (in milliseconds)
+//VARIABLES
+int val = 0;           // variable to store the value coming from the sensor
+float valDUST =0.0;
+float lastDUST =0.0;
+int samplingTime = 280;
+int deltaTime = 40;
+int sleepTime = 9680;
+float voMeasured = 0;
+float calcVoltage = 0;
+float dustDensity = 0;
+
+MySensor gw;
+MyMessage dustMsg(CHILD_ID_DUST, V_DUST_LEVEL);
+
+void setup()  
+{
+  gw.begin();
+
+  // Send the sketch version information to the gateway and Controller
+  gw.sendSketchInfo("Dust Sensor", "1.1");
+
+  // Register all sensors to gateway (they will be created as child devices)
+  gw.present(CHILD_ID_DUST, S_DUST);  
+   
+}
+
+void loop()      
+{    
+  uint16_t voMeasured = analogRead(DUST_SENSOR_ANALOG_PIN);// Get DUST value
+
+  // 0 - 5V mapped to 0 - 1023 integer values
+  // recover voltage
+  calcVoltage = voMeasured * (5.0 / 1024.0);
+
+  // linear eqaution taken from http://www.howmuchsnow.com/arduino/airquality/
+  // Chris Nafis (c) 2012
+  dustDensity = (0.17 * calcVoltage - 0.1)*1000;
+ 
+  Serial.print("Raw Signal Value (0-1023): ");
+  Serial.print(voMeasured);
+  
+  Serial.print(" - Voltage: ");
+  Serial.print(calcVoltage);
+  
+  Serial.print(" - Dust Density: ");
+  Serial.println(dustDensity); // unit: ug/m3
+ 
+  if (ceil(dustDensity) != lastDUST) {
+      gw.send(dustMsg.set((int)ceil(dustDensity)));
+      lastDUST = ceil(dustDensity);
+  }
+ 
+  gw.sleep(SLEEP_TIME);
+}