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    Best posts made by catchra

    • RE: 💬 Air Humidity Sensor - DHT

      For any one that needs it this is how I got the DHT22 to work.
      This is my poor attempt at trying to get the DHT22 to work as the original code
      https://github.com/cnerone/MySensorsArduinoExamples/blob/master/examples/DhtTemperatureAndHumiditySensor/DhtTemperatureAndHumiditySensor.ino
      will not compile for me.

      // Enable debug prints
      #define MY_DEBUG
      
      // Enable and select radio type attached 
      #define MY_RADIO_RF24
      //#define MY_RADIO_RFM69
      //#define MY_RS485
      
      #define MY_RF24_CE_PIN 9
      #define MY_RF24_CS_PIN 10
      
      #include <SPI.h>
      #include <MySensors.h>  
      #include <DHT.h>
      
      // Set this to the pin you connected the DHT's data pin to
      #define DHTPIN 2     // what digital pin we're connected to
      #define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
      
      #define CHILD_ID_HUM 0
      #define CHILD_ID_TEMP 1
      
      MyMessage msgHum(CHILD_ID_HUM, V_HUM);
      MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
      DHT dht(DHTPIN, DHTTYPE);
      
      void presentation()  
      { 
        // Send the sketch version information to the gateway
        sendSketchInfo("TemperatureAndHumidity", "1.1");
        
        // Register all sensors to gw (they will be created as child devices)
        present(CHILD_ID_HUM, S_HUM);
        present(CHILD_ID_TEMP, S_TEMP);
        
      }
      
      void setup()
      {
        dht.begin(); // set data pin of DHT sensor
      
      }
      
      void loop()      
      {  
       delay(2000);
       // Reading temperature or humidity takes about 250 milliseconds!
        // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
        float h = dht.readHumidity();
        // Read temperature as Celsius (the default)
        float t = dht.readTemperature();
        // Read temperature as Fahrenheit (isFahrenheit = true)
        float f = dht.readTemperature(true);
      
        // Check if any reads failed and exit early (to try again).
        if (isnan(h) || isnan(t) || isnan(f)) {
          return;
        }
      
        // Compute heat index in Fahrenheit (the default)
        float hif = dht.computeHeatIndex(f, h);
        // Compute heat index in Celsius (isFahreheit = false)
        float hic = dht.computeHeatIndex(t, h, false);
        
      
          send(msgTemp.set(f, 1));
          send(msgHum.set(h, 1));
      
        }
      
      posted in Announcements
      catchra
      catchra