soundlevel.pde

#include <WiFiShieldOrPmodWiFi_G.h>                     // This is for the MRF24WGxx on a pmodWiFi or WiFiShield
#include <DNETcK.h>
#include <DWIFIcK.h>
//Wifi Variables
char * server = "things.ubidots.com";    // server to connect to
unsigned short portServer = 80;
const char * szSsid = "Atom House Medellin";// Specify the SSID
#define USE_WPA2_PASSPHRASE
#if defined(USE_WPA2_PASSPHRASE)

    const char * szPassPhrase = "atommed2014";// modify the security key to what you have.
    #define WiFiConnectMacro() DWIFIcK::connect(szSsid, szPassPhrase, &status)
#else   // no security - OPEN

    #define WiFiConnectMacro() DWIFIcK::connect(szSsid, &status)

#endif
//Ubidots and Sensor Variables
String id="53e8f16476254238ae963390";
String token="NBbF3PWPxWc2IaO40aXOKnhIu8tOv92rYN3ibiEc7Jh6GV3KZUUCHtXuNz7Y";
String value="10";
const int sampleWindow=50;
int sample;
TcpClient tcpClient;

void setup() {
    Serial.begin(9600);
    DNETcK::STATUS status;
    int conID = DWIFIcK::INVALID_CONNECTION_ID;
    Serial.println("WiFiTCPClient 1.0");
    if((conID = WiFiConnectMacro()) != DWIFIcK::INVALID_CONNECTION_ID)
    {
        Serial.print("Connection Created, ConID = ");
        Serial.println(conID, DEC);
    }
    else
    {
        Serial.print("Unable to connection, status: ");
        Serial.println(status, DEC);
    }    
    DNETcK::begin();// use DHCP to get our IP and network addresses
    tcpClient.connect(server, portServer); // Connecto Ubidots Server
}

void loop() {
   unsigned long startMillis= millis();  // Start of sample window
   unsigned int peakToPeak = 0;   // peak-to-peak level
   unsigned int signalMax = 0;
   unsigned int signalMin = 1024;
   while (millis() - startMillis < sampleWindow)
   {
      sample = analogRead(A6);
      if (sample < 1024)  // toss out spurious readings
      {
         if (sample > signalMax)
         {
            signalMax = sample;  // save just the max levels
         }
         else if (sample < signalMin)
         {
            signalMin = sample;  // save just the min levels
         }
      }
   }
    peakToPeak = signalMax - signalMin;  // max - min = peak-peak amplitude
    double volts = (peakToPeak * 3.3) / 1024;  // convert to volts
    Serial.print("volts");  //Electret_Mic_Sensivity=6.309mV/Pa
    Serial.println(volts);
    double p1=volts*1000/6.309;
    int lp=20*log10(p1*100000/2);
    Serial.print("DB:");
    Serial.println(lp);
    value=String(lp);
    if(tcpClient.isConnected())
     {  
       Save_Value();
     }
   DNETcK::periodicTasks(); 
}

//Function to save values to ubidots
void  Save_Value(){
      Serial.println("Sending value to Ubidots");
      String var="{\"value\":"+ value + "}";
      String le=String(var.length());
      tcpClient.println("POST /api/v1.6/variables/"+id+"/values HTTP/1.1");
      tcpClient.println("Content-Type: application/json");
      tcpClient.println("Content-Length: "+le);
      tcpClient.println("X-Auth-Token: "+token);
      tcpClient.println("Host: things.ubidots.com");
      tcpClient.println();
      tcpClient.println(var);
      tcpClient.println();  
}