Mysensor Weather forecast using BMP180 and DHT11

Dear Readers, 

This schematic/circuit is a node for MySensor Gateway. For more information on Mysensor, please visit here

Material Required:

• Arduino Mini Pro 5V 16M
• NRF24L01+
• BMP180 Pressure sensor module
• DHT11 Temp+Humidity module
• Breadboard Power Supply
• Breadboard
• Jumper wire (Male/Female) as required

Arduino Mini Pro

NRF24L01+ with homemade breadboard adapter

DHT11 (Temperature+Humidity)

BMP180 (Pressure+Temperature)

Complete Parts

Schematic

Source Code:

I am still trying to figure out how I can get the code formatted on blogger, till then bear with me.
 #include <SPI.h>
    #include <MySensor.h> 
    #include <DHT.h> 
    #include <Wire.h>
    #include <Adafruit_BMP085.h>
   
    #define CHILD_ID_HUM 1
    #define CHILD_ID_TEMP 2
    #define CHILD_ID_BARO 3
    #define CHILD_ID_BTEMP 4
   
    #define HUMIDITY_SENSOR_DIGITAL_PIN 4
   
    boolean metric = false;
    int altitude = 216; // 741 feet above sealevel
    float lastBmpTemp = -1;
    float lastPressure = -1;
    float lastHum = -1;
    float lastTemp = -1;
    int updateAll = 60;
    int updateCount = 0;
    unsigned long SLEEP_TIME = 60000;
   
    Adafruit_BMP085 bmp = Adafruit_BMP085();
    DHT dht;
    MySensor gw;
   
    MyMessage msgHum(CHILD_ID_HUM, V_HUM);
    MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
    MyMessage msgBtemp(CHILD_ID_BTEMP, V_TEMP);
    MyMessage msgPressure(CHILD_ID_BARO, V_PRESSURE);
   
    void setup() 
    {
      analogReference(INTERNAL);
      gw.begin();
      dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN);
      bmp.begin();
      gw.sendSketchInfo("Weather Station", "1.0");
      gw.present(CHILD_ID_HUM, S_HUM);
      gw.present(CHILD_ID_TEMP, S_TEMP);
      gw.present(CHILD_ID_BARO, S_BARO);
      gw.present(CHILD_ID_BTEMP, S_TEMP);
      metric = gw.getConfig().isMetric;
    }
   
    void loop()     
    {
      updateCount += 1;
      if (updateCount == updateAll) {
        lastTemp = -1;
        lastHum = -1;
        lastBmpTemp = -1;
        lastPressure = -1;
        updateCount = 0;
      }
      delay(dht.getMinimumSamplingPeriod());
      float temperature = dht.getTemperature();
      if (isnan(temperature)) {
          lastTemp = -1;
      } else if (temperature != lastTemp) {
        lastTemp = temperature;
        if (!metric) {
          //temperature = temperature * 1.8 + 32.0;
        }
        gw.send(msgTemp.set(temperature, 1));
      }
      float humidity = dht.getHumidity();
      if (isnan(humidity)) {
          lastHum = -1;
      } else if (humidity != lastHum) {
          lastHum = humidity;
          gw.send(msgHum.set(humidity, 1));
      }
      float pressure = bmp.readSealevelPressure(altitude) * 0.01;
      float bmptemp = bmp.readTemperature();
      if (!metric) {
        //bmptemp = bmptemp * 1.8 + 32.0;
      }
      if (bmptemp != lastBmpTemp) {
        gw.send(msgBtemp.set(bmptemp,1));
        lastBmpTemp = bmptemp;
      }
      if (pressure != lastPressure) {
        gw.send(msgPressure.set(pressure, 0));
        lastPressure = pressure;
      }
      gw.sleep(SLEEP_TIME);
    }

Download Sketch here