Particle Photon - Grove Dust Sensor -> receiving No data available in the console. Need Help Urgently!

[dreamER]

try this:

#include "Particle.h"
#include <math.h>

int pin = D1;
unsigned long duration;
unsigned long starttime;
unsigned long sampletime_ms = 30000;//sampe 30s ;
unsigned long lowpulseoccupancy = 0;
float ratio = 0;
float concentration = 0;
 
void setup() 
{
    Serial.begin(9600);
    pinMode(pin,INPUT);
    starttime = millis();//get the current time;
}
 
void loop() 
{
    duration = pulseIn(pin, LOW);
    lowpulseoccupancy = lowpulseoccupancy+duration;
 
    if ((millis()-starttime) > sampletime_ms)//if the sampel time == 30s
    {
        ratio = lowpulseoccupancy/(sampletime_ms*10.0);  // Integer percentage 0=>100
        concentration = 1.1*pow(ratio,3)-3.8*pow(ratio,2)+520*ratio+0.62; // using spec sheet curve
        Serial.print(lowpulseoccupancy);
        Serial.print(",");
        Serial.print(ratio);
        Serial.print(",");
        Serial.println(concentration);
        lowpulseoccupancy = 0;
        starttime = millis();
    }
}

and connect your output (PIN4 output ) yellow wire to D1 on your photon

UPDATE
and here is code with Particle.variable() and Particle.publish() (code above just prints data to Serial)
with JSON formatted data:

#include "Particle.h"
#include <math.h>

char resultstr[128];
int pin = D1;
unsigned long duration;
unsigned long starttime;
unsigned long sampletime_ms = 30000;//sampe 30s ;
unsigned long lowpulseoccupancy = 0;
float ratio = 0;
float concentration = 0;
 
void setup() 
{
    Particle.variable("result", resultstr);
    Serial.begin(9600);
    pinMode(pin,INPUT);
    starttime = millis();//get the current time;
}
 
void loop() 
{
    duration = pulseIn(pin, LOW);
    lowpulseoccupancy = lowpulseoccupancy+duration;
 
    if ((millis()-starttime) > sampletime_ms)//if the sampel time == 30s
    {
        ratio = lowpulseoccupancy/(sampletime_ms*10.0);  // Integer percentage 0=>100
        concentration = 1.1*pow(ratio,3)-3.8*pow(ratio,2)+520*ratio+0.62; // using spec sheet curve
        Serial.print(lowpulseoccupancy);
        Serial.print(",");
        Serial.print(ratio);
        Serial.print(",");
        Serial.println(concentration);
        sprintf(resultstr, "{\"lowpulseoccupancy\":%d,\"ratio\":%.02f,\"concentration\":%.02f}", lowpulseoccupancy, ratio, concentration);
        Particle.publish("reading", resultstr);
        lowpulseoccupancy = 0;
        starttime = millis();
    }
}

here are explanation what is the lowpulseoccupancy, ratio and concentration for PPD42NS Grove Dust Sensor