send.ino

   1 // Licence: WTFPLv2 <http://www.wtfpl.net/txt/copying/>
   2 // Copyright 2015: Julien Moutinho <julm+air@autogeree.net>
   3
   4 #include <Wire.h>
   5 #include "SeeedGrayOLED.h"
   6 #include "AirQuality.h"
   7 #include "Arduino.h"
   8 #include "DHT.h"
   9
  10 unsigned long now;
  11 unsigned long counter;
  12
  13 #define DHTPIN 2
  14 //#define DHTTYPE DHT11 // DHT 11
  15 #define DHTTYPE DHT22 // DHT 22 (AM2302)
  16 DHT dht(DHTPIN, DHTTYPE);
  17
  18 AirQuality air;
  19 uint8_t    air_pin = A0;
  20 int        air_quality = -1;
  21
  22 int           dust_pin = 4;
  23 unsigned long dust_duration;
  24 unsigned long dust_last_time;
  25 unsigned long dust_delay = 30000;
  26 unsigned long dust_lowpulseoccupancy = 0;
  27 float         dust_concentration = 0;
  28 float         dust_ratio = 0;
  29
  30 /* MQ9: CO CH4 LPG */
  31 unsigned long mq9_last_time;
  32 unsigned long mq9_delay = 1000;
  33 float         mq9_R0 = 0.40;
  34 uint8_t       mq9_pin = A2;
  35
  36 #define BUZZER 10
  37
  38 void setup() {
  39         Serial.begin(9600);
  40         //while (!Serial) {
  41         //  ; // wait for serial port to connect. Needed for native USB port only
  42         // }
  43
  44         Wire.begin();                       // Initialize I2C
  45         SeeedGrayOled.init();               // Initialize SEEED OLED display
  46         SeeedGrayOled.clearDisplay();       // Clear the screen and set start position to top left corner
  47         SeeedGrayOled.setNormalDisplay();   // Set display to normal mode (i.e non-inverse mode)
  48         SeeedGrayOled.setVerticalMode();
  49         //SeeedGrayOled.setPageMode();      // Set addressing mode to Page Mode
  50         SeeedGrayOled.setTextXY(0,0);       // Set the cursor to Xth Page, Yth Column
  51         SeeedGrayOled.putString("Init..."); // Print the String
  52
  53         pinMode(BUZZER, OUTPUT);
  54         digitalWrite(BUZZER, LOW);
  55         air.init(14);
  56         dht.begin();
  57
  58         pinMode(dust_pin,INPUT);
  59         now = millis();
  60         dust_last_time = now;
  61         mq9_last_time  = now;
  62         Serial.println("loop;uptime;temperature;humidity;air;dust;co_ch4_lpg");
  63  }
  64
  65 void loop() {
  66         float h = dht.readHumidity();
  67         float t = dht.readTemperature();
  68         counter = counter + 1;
  69         now = millis();
  70         Serial.write("loop=");
  71         Serial.print(counter);
  72         Serial.write(";up=");
  73         Serial.print(now);
  74
  75         /* DHT */
  76                 // Reading temperature or humidity takes about 250 milliseconds!
  77                 // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  78                 Serial.write(";temp=");
  79                 if (isnan(t)) {
  80                         SeeedGrayOled.setTextXY(0,0);
  81                         SeeedGrayOled.putString("T: ERROR    ");
  82                  }
  83                 else {
  84                         Serial.print(t);
  85                         SeeedGrayOled.setTextXY(0,0);
  86                         SeeedGrayOled.putString("T:          ");
  87                         SeeedGrayOled.setTextXY(0,3);
  88                         SeeedGrayOled.putFloat(t);
  89                         SeeedGrayOled.putString("*C");
  90
  91                  }
  92
  93                 Serial.write(";humi=");
  94                 if (isnan(h)) {
  95                         SeeedGrayOled.setTextXY(1,0);
  96                         SeeedGrayOled.putString("H: ERROR    ");
  97                  }
  98                 else {
  99                         Serial.print(h);
 100                         SeeedGrayOled.setTextXY(1,0);
 101                         SeeedGrayOled.putString("H:          ");
 102                         SeeedGrayOled.setTextXY(1,3);
 103                         SeeedGrayOled.putFloat(h);
 104                         SeeedGrayOled.putString("%");
 105                  }
 106
 107         /* Air Quality */
 108                 air_quality=air.slope();
 109                 Serial.write(";air=");
 110                 if (air_quality >= 0) {
 111                         Serial.print(air.first_vol,DEC);
 112                         if (air_quality <= 1)
 113                                 // Air quality is bad.
 114                                 // Let's revert display to make some light!
 115                                 SeeedGrayOled.setInverseDisplay();
 116                         else
 117                                 SeeedGrayOled.setNormalDisplay();
 118
 119                         SeeedGrayOled.setTextXY(2,0);
 120                         SeeedGrayOled.putString("Air:        ");
 121                         SeeedGrayOled.setTextXY(2,5);
 122                         SeeedGrayOled.putNumber(air.first_vol);
 123
 124                         SeeedGrayOled.setTextXY(3,3);
 125                         if (air_quality==0)
 126                         SeeedGrayOled.putString("0/4 (x_x)");
 127                         else if (air_quality==1)
 128                         SeeedGrayOled.putString("1/4 (>_<)");
 129                         else if (air_quality==2)
 130                         SeeedGrayOled.putString("2/4 (=_=)");
 131                         else if (air_quality==3)
 132                         SeeedGrayOled.putString("3/4 (*_*)");
 133                         else
 134                         SeeedGrayOled.putString("4/4 (^_^)");
 135
 136                         if (air_quality<1)
 137                                 digitalWrite(BUZZER, HIGH);
 138                         else
 139                                 digitalWrite(BUZZER, LOW);
 140                  }
 141
 142         /* Dust */
 143                 dust_duration = pulseIn(dust_pin, LOW);
 144                 dust_lowpulseoccupancy = dust_lowpulseoccupancy + dust_duration;
 145                 Serial.write(";dust=");
 146                 if ((now - dust_last_time) >= dust_delay) {
 147                         dust_last_time = now;
 148                         dust_ratio = dust_lowpulseoccupancy / (dust_delay * 10.0); // Integer percentage 0=>100
 149                         dust_concentration = 1.1*pow(dust_ratio,3)
 150                          - 3.8*pow(dust_ratio,2)
 151                          + 520*dust_ratio
 152                          + 0.62; // Using spec sheet curve
 153                         /*
 154                         Serial.print(dust_lowpulseoccupancy);
 155                         Serial.write(';');
 156                         Serial.print(dust_ratio);
 157                         */
 158                         Serial.print(dust_concentration);
 159                         SeeedGrayOled.setTextXY(4,0);
 160                         SeeedGrayOled.putString("Dust:       ");
 161                         SeeedGrayOled.setTextXY(4,7);
 162                         SeeedGrayOled.putNumber(dust_concentration);
 163                         dust_lowpulseoccupancy = 0;
 164                  }
 165
 166         /* MQ9: CO CH4 LPG */
 167                 Serial.write(";fire=");
 168                 if ((now - mq9_last_time) >= mq9_delay) {
 169                         mq9_last_time = now;
 170                         int mq9_read = analogRead(mq9_pin);
 171                         float mq9_volt = (float)mq9_read / 1024 * 5.0;
 172                         float mq9_RS  = (5.0 - mq9_volt) / mq9_volt; // omit *RL
 173                         /* Replace the name "R0" with the value of R0 in the demo of First Test */
 174                         float mq9_ratio = mq9_RS / mq9_R0;  // mq9_ratio = RS/R0
 175                         float mq9_R0_ = mq9_RS / 9.9; // The ratio of RS/R0 is 9.9 in LPG gas from Graph (Found using WebPlotDigitizer)
 176
 177                         Serial.print(mq9_R0_);
 178                         SeeedGrayOled.setTextXY(5,0);
 179                         SeeedGrayOled.putString("Feu:        ");
 180                         SeeedGrayOled.setTextXY(5,5);
 181                         //SeeedGrayOled.putFloat(mq9_ratio);
 182                         //Serial.print(mq9_ratio);
 183                         SeeedGrayOled.putFloat(mq9_R0_);
 184                  }
 185
 186         Serial.println();
 187  }
 188
 189 ISR(TIMER2_OVF_vect) {
 190         if(air.counter==122) {
 191          // NOTE: set 2 seconds as a detected duty
 192                 air.last_vol    = air.first_vol;
 193                 air.first_vol   = analogRead(air_pin);
 194                 air.counter     = 0;
 195                 air.timer_index = 1;
 196                 //PORTB=PORTB^0x20;
 197          }
 198         else {
 199                 air.counter++;
 200          }
 201  }