MySensor : DustSensorDSM

Took me an hour to get this code running lol. Here is the fixed version by me:

// Enable debug prints
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_RF24
//#define MY_RADIO_NRF5_ESB
//#define MY_RADIO_RFM69
//#define MY_RADIO_RFM95

#include <mysensors.h>
#include <spi.h>

#define CHILD_ID_DUST_PM10 0
#define CHILD_ID_DUST_PM25 1
#define DUST_SENSOR_DIGITAL_PIN_PM10 6
#define DUST_SENSOR_DIGITAL_PIN_PM25 3

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 valDUSTPM25 =0.0;
float lastDUSTPM25 =0.0;
float valDUSTPM10 =0.0;
float lastDUSTPM10 =0.0;
unsigned long duration;
unsigned long starttime;
unsigned long endtime;
unsigned long sampletime_ms = 30000;
unsigned long lowpulseoccupancy = 0;
float ratio = 0;
long concentrationPM25 = 0;
long concentrationPM10 = 0;

MyMessage dustMsgPM10(CHILD_ID_DUST_PM10, V_LEVEL);
MyMessage msgPM10(CHILD_ID_DUST_PM10, V_UNIT_PREFIX);
MyMessage dustMsgPM25(CHILD_ID_DUST_PM25, V_LEVEL);
MyMessage msgPM25(CHILD_ID_DUST_PM25, V_UNIT_PREFIX);

void presentation()
{

// Send the sketch version information to the gateway and Controller
sendSketchInfo("Dust Sensor DSM501", "1.4");

// Register all sensors to gateway (they will be created as child devices)
present(CHILD_ID_DUST_PM10, S_DUST);
send(msgPM10.set("ppm"));
present(CHILD_ID_DUST_PM25, S_DUST);
send(msgPM25.set("ppm"));

pinMode(DUST_SENSOR_DIGITAL_PIN_PM10,INPUT);
pinMode(DUST_SENSOR_DIGITAL_PIN_PM25,INPUT);

}

void loop()
{

//get PM 2.5 density of particles over 2.5 μm.
concentrationPM25=(long)getPM(DUST_SENSOR_DIGITAL_PIN_PM25);
Serial.print("PM25: ");
Serial.println(concentrationPM25);
Serial.print("\n");

if ((concentrationPM25 != lastDUSTPM25)&&(concentrationPM25>0)) {
send(dustMsgPM25.set((long)ceil(concentrationPM25)));
lastDUSTPM25 = ceil(concentrationPM25);
}
//get PM 1.0 - density of particles over 1 μm.
concentrationPM10=getPM(DUST_SENSOR_DIGITAL_PIN_PM10);
Serial.print("PM10: ");
Serial.println(concentrationPM10);
Serial.print("\n");
//ppmv=mg/m3 * (0.08205*Tmp)/Molecular_mass
//0.08205 = Universal gas constant in atm·m3/(kmol·K)
int temp=20; //external temperature, if you can replace this with a DHT11 or better
long ppmv=(concentrationPM10*0.0283168/100/1000) * (0.08205*temp)/0.01;

if ((ceil(concentrationPM10) != lastDUSTPM10)&&((long)concentrationPM10>0)) {
send(dustMsgPM10.set((long)ppmv));
lastDUSTPM10 = ceil(concentrationPM10);
}

//sleep to save on radio
sleep(SLEEP_TIME);

}

long getPM(int DUST_SENSOR_DIGITAL_PIN) {

starttime = millis();

while (1) {

duration = pulseIn(DUST_SENSOR_DIGITAL_PIN, LOW);
lowpulseoccupancy += duration;
endtime = millis();

if ((endtime-starttime) > sampletime_ms)
{
ratio = (lowpulseoccupancy-endtime+starttime)/(sampletime_ms*10.0); // Integer percentage 0=>100
long concentration = 1.1*pow(ratio,3)-3.8*pow(ratio,2)+520*ratio+0.62; // using spec sheet curve
Serial.print("lowpulseoccupancy:");
Serial.print(lowpulseoccupancy);
Serial.print("\n");
Serial.print("ratio:");
Serial.print(ratio);
Serial.print("\n");
Serial.print("DSM501A:");
Serial.println(concentration);
Serial.print("\n");

lowpulseoccupancy = 0;
return(concentration);
}
}
}

This example was tested on 2016-06-11 and it failed to compile on common Arduino boards