Arduino Current Measuring Project

Using Arduino Project Guidance
4

This is the circuit:

This is what i have done:

1456×2592 866 KB

When i connect sensor to circuit, results around: 32 A
When i disconnect it, results around 9 A
when i disconnect A1 input pin, results around 3 A

#include "EmonLib.h"                   // Include Emon Library
EnergyMonitor emon1;                   // Create an instance
 
void setup()
{  
  Serial.begin(9600);
 
  emon1.current(1, 17.9);             // Current: input pin, calibration.
  //calibration is explained bellow
}
 
void loop()
{
  double Irms = emon1.calcIrms(1480);  // Calculate Irms only
 
  Serial.print(Irms*230.0);         // Apparent power
  Serial.print(" ");
  Serial.println(Irms);          // Irms
}