arduino/MeteoStenice2/MeteoStenice2.ino

   1 #include "Wire.h"
   2 #include "Adafruit_BMP085.h"
   3 #include <dht.h>
   4
   5 //#define EOL ";"
   6
   7 Adafruit_BMP085 bmp;
   8 dht DHT;
   9 #define DHT11PIN 2
  10
  11 // delta max = 0.6544 wrt dewPoint()
  12 // 5x faster than dewPoint()
  13 // reference: http://en.wikipedia.org/wiki/Dew_point
  14 double dewPointFast(double celsius, double humidity)
  15 {
  16         double a = 17.271;
  17         double b = 237.7;
  18         double temp = (a * celsius) / (b + celsius) + log(humidity/100);
  19         double Td = (b * temp) / (a - temp);
  20         return Td;
  21 }
  22
  23 void setup() {
  24   Serial.begin(9600);
  25   bmp.begin();
  26
  27   Serial.println("\n");
  28 }
  29
  30 void loop() {
  31   int chk = DHT.read11(DHT11PIN);
  32   if(chk != DHTLIB_OK) Serial.println("DHTLIB ERROR!");
  33
  34   Serial.print("{");
  35     Serial.print("\"config\":{");
  36       Serial.print("\"airquality\":{\"label\":\"Air Quality\",\"unit\":\"Relative\"},");
  37       Serial.print("\"temp\":{\"label\":\"Temperature\",\"unit\":\"°C\"},");
  38       Serial.print("\"pressure\":{\"label\":\"Pressure\",\"unit\":\"Pa\"},");
  39       Serial.print("\"humidity\":{\"label\":\"Humidity\",\"unit\":\"% RH\"},");
  40       Serial.print("\"analog\":{\"label\":\"ADC\",\"unit\":\"Relative\"}");
  41     Serial.print("},");
  42     Serial.print("\"data\":{");
  43
  44       Serial.print("\"airquality\":[");
  45
  46         Serial.print("{\"label\":\"Air polution (MQ-2)\",\"value\":\"");
  47         Serial.print(analogRead(A1));
  48         Serial.print("\"}");
  49
  50       Serial.print("],");
  51
  52
  53 /*
  54       Serial.print("\"analog\":[");
  55
  56         Serial.print("{\"label\":\"ADC A0 (antenna?)\",\"value\":\"");
  57         Serial.print(analogRead(A0));
  58         Serial.print("\"}");
  59
  60         Serial.print(",{\"label\":\"ADC A2 (phototransistor?)\",\"value\":\"");
  61         Serial.print(analogRead(A2));
  62         Serial.print("\"}");
  63
  64       Serial.print("],");
  65 */
  66
  67       Serial.print("\"temp\":[");
  68
  69         Serial.print("{\"label\":\"BMP085 Temperature\",\"value\":\"");
  70         Serial.print(bmp.readTemperature());
  71         Serial.print("\"}");
  72
  73         Serial.print(",{\"label\":\"DHT11 Temperature\",\"value\":\"");
  74         Serial.print((float)DHT.temperature);
  75         Serial.print("\"}");
  76
  77       Serial.print("],");
  78
  79
  80       Serial.print("\"pressure\":[");
  81
  82         Serial.print("{\"label\":\"BMP085 Pressure\",\"value\":\"");
  83         Serial.print(bmp.readPressure());
  84         Serial.print("\"}");
  85
  86       Serial.print("],");
  87
  88
  89       Serial.print("\"humidity\":[");
  90
  91         Serial.print("{\"label\":\"DHT11 Humidity\",\"value\":\"");
  92         Serial.print((float)DHT.humidity);
  93         Serial.print("\"}");
  94
  95       Serial.print("]");
  96
  97     Serial.print("}");
  98   Serial.print("}\n");
  99   delay(2000);
 100 }