adminguy
/
Air_Quality_Sensor_PPD42

#include <math.h>

//--- made by SKA ---
//--- test EtherEncLib 
// adapted by Renato Aloi
// May 2015
// removed SD Card part for future implementation

#include <SPI.h>
#include <EtherEncLib.h>
#if (ESP8266)
#include <pgmspace.h>
#else
#include <avr/pgmspace.h>
#endif


static unsigned char ipaddr[] = { 192, 168, 1, 125 };static unsigned char macaddr[] = { 0x00, 0x11, 0x22, 0x44, 0x00, 0x25 };
EtherEncLib eElib(80);
const PROGMEM char resp200Txt[] = {"HTTP/1.0 200 OK\n\rContent-Type: text/html\n\rPragma: no-cache\n\r\n\r"};
//sensor start

int DustSensePin = 13;unsigned long duration;unsigned long starttime;unsigned long sampletime_ms = 30000;//sample 30s ;
unsigned long lowpulseoccupancy = 0;float ratio = 0;float concentration = 0;

void setup() {#if (ESP8266)
    Serial.begin(115200);    pinMode(5,OUTPUT);	//--- ? -- SS pin must be output # by Renato Aloi
#else
    Serial.begin(9600);    pinMode(8,OUTPUT);	//--- ? -- SS pin must be output # by Renato Aloi
#endif

  eElib.begin(ipaddr,macaddr);  Serial.println(F("------ program start -----------"));  //Serial.println(F("NO SDCARD version")); // by Renato Aloi
    pinMode(DustSensePin,INPUT);    starttime = millis();//get the current time;
}
void loop() {    duration = pulseIn(DustSensePin, LOW);    lowpulseoccupancy = lowpulseoccupancy+duration;        if ((millis()-starttime) > sampletime_ms)//if the sample time == 30s
    {        ratio = lowpulseoccupancy/(sampletime_ms*10.0);  // Integer percentage 0=>100
                //float exponential power - DOESN"T BUILD
        //concentration = 1.1*powf(ratio,3)-3.8*powf(ratio,2)+520*ratio+0.62; // using spec sheet curve
                //leaner exponential power 
        concentration = 1.1*ipow(ratio,3)-3.8*ipow(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();    }      if ( eElib.available() )   {    Serial.println(eElib.getParams());    eElib.print((char *)&resp200Txt[0],strlen_P(&resp200Txt[0]));    if (eElib.isIndexHtml)    {      eElib.print("<HTML><body><H1>Hello World!</H1>");      //eElib.print("<form method=POST>");
      eElib.print("<br>");      eElib.print((int)lowpulseoccupancy);      eElib.print("<br>");      eElib.print((int)ratio);      eElib.print("<br>");      eElib.print((int)concentration);      eElib.print("<br>");      //eElib.print("</form></body>");
      eElib.print("</body></HTML>");              //Serial.print(lowpulseoccupancy);
        //Serial.print(",");
        //Serial.print(ratio);
        //Serial.print(",");
        //Serial.println(concentration);
    }    /*
    else if (eElib.isPost)    {      eElib.print("<HTML><body><H1>POST Params: ");      eElib.print(eElib.getParams());      eElib.print("</H1></body>");      eElib.print("</HTML>");    }    else if (eElib.isGet)    {      eElib.print("<HTML><body><H1>GET Params: ");      eElib.print(eElib.getParams());      eElib.print("</H1></body>");      eElib.print("</HTML>");    }*/    eElib.close();  }}
int ipow(int base, int exp){    int result = 1;    for (;;)    {        if (exp & 1)            result *= base;        exp >>= 1;        if (!exp)            break;        base *= base;    }
    return result;}