Dust Sensor

[flopp]

I think my dust sensor is working fine with the second sketch i have attached in this post.
I think some rows are missing in the MySensors sketch

I can be wrong but my dust sensor didn't work with MySensors sketch, i had to modify it.

Anyone that have this sensor and a working sketch?

/**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * REVISION HISTORY
 * Version 1.0 - epierre
 * Converted to 1.4 by Henrik Ekblad
 * 
 * DESCRIPTION
 * 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)
 * 
 * http://www.mysensors.org/build/dust
 * 
 */

#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_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);
}

Int val = 0;

this is not in use anywhere in the code and if you comment it out it will still compile
can be deleted
2.
You need to connect 6 cables otherwise it will not work.
In beginning it says

 *   VCC       >>> 5V
 *   A         >>> A0
 *   GND       >>> GND

Here you can find how it must be connected
https://www.sparkfun.com/datasheets/Sensors/gp2y1010au_e.pdf
and here
http://arduinodev.woofex.net/2012/12/01/standalone-sharp-dust-sensor/

Original sketch for Sharp GP2Y1010AU0F is like this

/*
 Standalone Sketch to use with a Arduino Fio and a
 Sharp Optical Dust Sensor GP2Y1010AU0F
 
 Blog: http://arduinodev.woofex.net/2012/12/01/standalone-sharp-dust-sensor/
 Code: https://github.com/Trefex/arduino-airquality/
 
 For Pin connections, please check the Blog or the github project page
 Authors: Cyrille Médard de Chardon (serialC), Christophe Trefois (Trefex)
 Changelog:
   2012-Dec-01:  Cleaned up code
 
 This work is licensed under the
 Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
 To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
 or send a letter to Creative Commons, 444 Castro Street, Suite 900,
 Mountain View, California, 94041, USA.
*/
 
int measurePin = 6;
int ledPower = 12;
 
int samplingTime = 280;
int deltaTime = 40;
int sleepTime = 9680;
 
float voMeasured = 0;
float calcVoltage = 0;
float dustDensity = 0;
 
void setup(){
  Serial.begin(9600);
  pinMode(ledPower,OUTPUT);
}
 
void loop(){
  digitalWrite(ledPower,LOW); // power on the LED
  delayMicroseconds(samplingTime);
 
  voMeasured = analogRead(measurePin); // read the dust value
 
  delayMicroseconds(deltaTime);
  digitalWrite(ledPower,HIGH); // turn the LED off
  delayMicroseconds(sleepTime);
 
  // 0 - 3.3V mapped to 0 - 1023 integer values
  // recover voltage
  calcVoltage = voMeasured * (3.3 / 1024);
 
  // linear eqaution taken from http://www.howmuchsnow.com/arduino/airquality/
  // Chris Nafis (c) 2012
  dustDensity = 0.17 * calcVoltage - 0.1;
 
  Serial.print("Raw Signal Value (0-1023): ");
  Serial.print(voMeasured);
 
  Serial.print(" - Voltage: ");
  Serial.print(calcVoltage);
 
  Serial.print(" - Dust Density: ");
  Serial.println(dustDensity);
 
  delay(1000);
}

1. MySensors sketch doesn't include any POWERLED, without this it cant work

int ledPower = 12;

[epierre]

hello,

Thanks for reporting, I will check again here, for I never really successfully managed to have this one working.

Beside this, the two others (cheaper but good anyway !) are working fine, see my repo here:
https://github.com/empierre/arduino

[brnwshr]

@flopp
same experience here,
The sketch provided by Mysensors.org does not switch on/off the LED used to detect the dust particle (code below with corrections).
I tested that sensor (Sharp_GP2Y1010AU) with smoke and because it does not have a fan (like the nova fitness SD011) or does not create a draft with a resistor (like the Shinyei PPD42NS) the fumes can go around completely undetected. When i tested the sharp and Shinyei in parallel the later seemed a lot more reliable.
I also modified the code for the sharp sensor to get the arduino to loop thru multiple readings before sending a smoothed result back to the gateway.
Code below with lots of debugging.

/**
* The MySensors Arduino library handles the wireless radio link and protocol
* between your home built sensors/actuators and HA controller of choice.
* The sensors forms a self healing radio network with optional repeaters. Each
* repeater and gateway builds a routing tables in EEPROM which keeps track of the
* network topology allowing messages to be routed to nodes.
*
* Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
* Copyright (C) 2013-2015 Sensnology AB
* Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
*
* Documentation: http://www.mysensors.org
* Support Forum: http://forum.mysensors.org
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
*******************************
*
* REVISION HISTORY
* Version 1.0 - epierre
* Converted to 1.4 by Henrik Ekblad
* 
* 
* DESCRIPTION
* Arduino Dust Sensort
*
* connect the sensor as follows :
* 
*   VCC       >>> 5V
*   A         >>> A0
*   GND       >>> GND
*   LED       >>> 2
*
* Based on: http://www.dfrobot.com/wiki/index.php/Sharp_GP2Y1010AU 
* Authors: Cyrille Médard de Chardon (serialC), Christophe Trefois (Trefex)
* 
* http://www.mysensors.org/build/dust
* 
*/

#include <MySensor.h>  
#include <SPI.h>
#define CHILD_ID_DUST 0
#define DUST_SENSOR_ANALOG_PIN 0

int ledPower = 2;
const int numreadings = 60;

unsigned long SLEEP_TIME = 10*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_LEVEL);

void setup(){
 gw.begin();
 pinMode(ledPower,OUTPUT);
 // 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(){
float cumsum = 0;
float temp = 0;
float temp1 = 0;
float cum_density = 0;
     for (int sample = 0; sample < numreadings; sample ++){ // loop reading dust sensor
       digitalWrite(ledPower,LOW); // power on the LED
       delayMicroseconds(samplingTime);
       uint16_t voMeasured = analogRead(DUST_SENSOR_ANALOG_PIN);// Get DUST value
       delayMicroseconds(deltaTime);
        digitalWrite(ledPower,HIGH); // turn the LED off
       // 0 - 5V mapped to 0 - 1023 integer values
       // recover voltage
       temp = voMeasured * (5.0 / 1024.0);
       cumsum = cumsum + temp;// cumulative sum over 60 seconds
       delay(1000);
       Serial.print("reading sample: ");
       Serial.println(sample);
       Serial.print("Raw Signal Value (0-1023): ");
       Serial.println(voMeasured);    
       Serial.print(" - cumulative: ");
       Serial.println(cumsum);
}
// linear eqaution taken from http://www.howmuchsnow.com/arduino/airquality/
// Chris Nafis (c) 2012
dustDensity = (0.17 * cumsum - 0.1)* (1000/60);
       
Serial.print(" - Dust Density: ");
Serial.println(dustDensity); // unit: ug/m3
Serial.println("#########################################");

//  if (ceil(dustDensity) != lastDUST) {
//      gw.send(dustMsg.set((int)ceil(dustDensity)));
//      lastDUST = ceil(dustDensity);
//  }
gw.send(dustMsg.set((int)ceil(dustDensity)));
 gw.sleep(SLEEP_TIME);
}```