ArduinoCode.ino

#include <SoftwareSerial.h>
/* Create object named SIM900 of the class SoftwareSerial */
SoftwareSerial SIM900(8, 7);

void setup() {
  SIM900.begin(9600);  /* Define baud rate for software serial communication */
  Serial.begin(9600); /* Define baud rate for serial communication */
  Serial.println("GSM Powering Up");
  
  delay(5000);

  SIM900.println("AT+CGATT=1");
  delay(2000);
  ShowSerialData();
  
  /* Configure bearer profile 1 */
  Serial.println("Set connection type GPRS");    
  SIM900.println("AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\"");  /* Connection type GPRS */
  delay(1000);
  ShowSerialData();
  
  Serial.println("Set APN of provider");  
  SIM900.println("AT+SAPBR=3,1,\"APN\",\"airtelgprs.com\"");  /* APN of the provider */
  delay(1000);
  ShowSerialData();
  
  Serial.println("Open GPRS context");
  SIM900.println("AT+SAPBR=1,1"); /* Open GPRS context */
  delay(1000);
  ShowSerialData();
  
  Serial.println("Querying GPRS context");
  SIM900.println("AT+SAPBR=2,1"); /* Query the GPRS context */
  delay(1000);
  ShowSerialData();
}

void loop() {
  SubmitHttpRequest();
  delay(2000);
}

void ShowSerialData()
{
  while(SIM900.available()!=0)  /* If data is available on serial port */
  Serial.write(char (SIM900.read())); /* Print character received on to the serial monitor */
}

void SubmitHttpRequest()
{ 
  Serial.println("Initialize HTTP service");
  SIM900.println("AT+HTTPINIT"); /* Initialize HTTP service */
  delay(3000);
  ShowSerialData();

  Serial.println("Set HTTP Parameters");
  SIM900.println("AT+HTTPPARA=\"CID\",1");  /* Set parameters for HTTP session */
  delay(1000);
  ShowSerialData();

  int CurrIn = 1;
  int TempIn = 3;
  int VoltIn = 0;
  
  int ACSoffset = 2500;
  int mVperAmp = 66;
  
  float maxcurr=0;
  float maxvolt=0;
  float temp=0;
  float voltage = 0;
  int i=0;
  
  while(i<=1000){
    float RawValue = analogRead(CurrIn);
    float CURR_Voltage = (RawValue / 1024.0) * 5000; // Gets you mV
    float current = ((CURR_Voltage - ACSoffset) / mVperAmp);
   
    if(current>maxcurr)
    maxcurr=current;

    float tempvout = analogRead(TempIn);
    temp = temp + ((tempvout*500)/1023);

    /*Voltage Reading starts*/
    voltage = ((((analogRead(VoltIn))*5/1024)+.7))*4*9.15;

   if(voltage>maxvolt)
   maxvolt = voltage;

   delay(1);
   i=i+1;
  }
  i=0;

  float data_voltage = maxvolt*0.707;
  float data_current = maxcurr*0.707;
  float data_temperature = temp/1000.0;

  Serial.print("Voltage:\t");
  Serial.println(data_voltage);
  Serial.print("Current:\t");
  Serial.println(data_current);
  Serial.print("Temperature:\t");
  Serial.println(data_temperature);
  Serial.println();
  maxcurr=0;
  maxvolt=0;
  temp=0;
  
  Serial.println("Set URL");
  String url = "sensor-data-visualization.herokuapp.com/post_data?";
  url = url + "current=" + String(data_current) + "&voltage=" + String(data_voltage) + "&temperature=" + String(data_temperature) + "&power=" + String(data_voltage*data_current);
  Serial.println(url);

  String get_command = "AT+HTTPPARA=\"URL\"," + url;
  SIM900.println(get_command);  /* Set parameters for HTTP session */
  delay(2000);
  ShowSerialData();

  Serial.println("Send GET request");
  SIM900.println("AT+HTTPACTION=0");  /* Start GET session */
  delay(4000);
  ShowSerialData();
  
  Serial.println("Terminate HTTP service");  
  SIM900.println("AT+HTTPTERM");  /* Terminate HTTP service */
  delay(2000);
  ShowSerialData(); 
}