arduino

#include <SoftwareSerial.h>
#include <ArduinoJson.h>
SoftwareSerial s(5,6);

int pin = 13;
float rads = 57.29577951; // 1 radian = approx 57 deg.
float degree = 360;
float frequency = 50;
float nano = 1 * pow (10,-6);
#include "EmonLib.h"
EnergyMonitor emon1;
float pf;
float angle;
float pf_max = 0;
float angle_max = 0;
int ctr;
float powerFactor(void);
float power(void);
void setup()
{
  pinMode(pin, INPUT);
//  Serial.begin(9600);

  s.begin(115200);

  emon1.voltage(2, 170, 1.7);  // Voltage: input pin, calibration, phase_shift
  emon1.current(1, 49);       // Current: input pin, calibration.
}
StaticJsonBuffer<1000> jsonBuffer;
JsonObject& root = jsonBuffer.createObject();
void loop()
{
//  float pf_data = powerFactor();
//  float power_data = power();
//

  root["pf"]= powerFactor();
  root["power"] = power();

  if(s.available()>0)
  {
   root.printTo(s);
  }


}


float powerFactor(void)
{
  for (ctr = 0; ctr <= 4; ctr++) // Perform 4 measurements then reset
  {
  // 1st line calculates the phase angle in degrees from differentiated time pulse
  // Function COS uses radians not Degree's hence conversion made by dividing angle / 57.2958
   angle = ((((pulseIn(pin, HIGH)) * nano)* degree)* frequency);
  // pf = cos(angle / rads);

   if (angle > angle_max) // Test if the angle is maximum angle
     {
      angle_max = angle; // If maximum record in variable "angle_max"
      pf_max = cos(angle_max / rads); // Calc PF from "angle_max"
     }
   }
   if (angle_max > 360) // If the calculation is higher than 360 do following...
   {
    angle_max = 0; // assign the 0 to "angle_max"
    pf_max = 1; // Assign the Unity PF to "pf_max"
   }
   if (angle_max == 0) // If the calculation is higher than 360 do following...
   {
    angle_max = 0; // assign the 0 to "angle_max"
    pf_max = 1; // Assign the Unity PF to "pf_max"
   }
   Serial.print(angle_max, 2); // Print the result
   Serial.print(",");
   Serial.println(pf_max, 2);
   angle = 0; // Reset variables for next test
   angle_max = 0;
   return pf_max;
}


float power(void)
{

    emon1.calcVI(20, 2000);

  return emon1.realPower;
}