Arduino uno using resistor shunt problems

Other Hardware Sensors
11

Hello guys,

I need some help. I can’t understand why it's not printing out any value beside 0 on my serial monitor. So I use a Shunt resistor that has the resolution of 75mV for 50A. why the analog pin can't be read when connected to a resistor shunt? the data just reads 0 only...

The real problem is, when I convert this number to Amps, I always get 0.

by doing hand calculations, this formula gets me a value that make sense. Can somebody explain to me why I always get 0 at Serial.println(amps).

Thanks so much.

here the sketch code

const int inPin =A3 ;
const float SHUNT_CURRENT =50.0;//A
const float SHUNT_VOLTAGE =75.0;// mV
const float CORRECTION_FACTOR = 2.00;


const int ITERATION = 50; //can change
const float VOLTAGE_REFERENCE = 1100.00;//1.1V
const int BIT_RESOLUTION =10;
const boolean DEBUG_ONCE = true;

void setup() {
  Serial.begin(9600);
  Serial.println("Measuring Current DC");
  analogReference(INTERNAL);//1.1V internal reference
  delay(500);
}

void loop() {
  
  printCurrent();
  getCurrent();
  
  delay(500);
}

float getCurrent(){
  
    float averageSensorValue =0;
    int sensorValue ;
    float voltage, current;

    for(int i=0; i< ITERATION; i++)
    {   
      sensorValue = analogRead(inPin);
      delay(5);
      if(sensorValue !=0 && sensorValue < 100)
      {
        voltage = (sensorValue +0.5) * (VOLTAGE_REFERENCE /  (pow(2,BIT_RESOLUTION)-1)); 
        current  = voltage * (SHUNT_CURRENT /SHUNT_VOLTAGE )  ;
        if(i !=0){
          averageSensorValue += current+CORRECTION_FACTOR;
        }
        delay(1);
      }else{
        i--;
      }
    }    
   //IGNORE_CURRENT_BELOW
    averageSensorValue /=(ITERATION-1);
    return   averageSensorValue;
}//getCurrent()

void printCurrent()
{
   Serial.println("Current:");
   Serial.print(getCurrent(),2);
   Serial.println("A");
   Serial.println();
   
}

Moderator edit: code tags added