Current Meter using ACS712

[branx86]

/*
  ACS712 Current Sensor
  modified on 06 Sep 2020
  by Mohammad Reza Akbari @ Electropeak
  Home
*/


int analogPin = A0; // Current sensor output

const int averageValue = 500;
long int sensorValue = 0;  // variable to store the sensor value read

float voltage = 0;
float current = 0;

void setup() {
  Serial.begin(9600);           //  setup serial
}

void loop() {

  for (int i = 0; i < averageValue; i++)
  {
    sensorValue += analogRead(analogPin);

    // wait 2 milliseconds before the next loop
    delay(2);
  }

  sensorValue = sensorValue / averageValue;
  voltage = sensorValue * 5.0 / 1024.0;
  current = (voltage - 2.5) / 0.185;

  Serial.print("ADC Value: ");
  Serial.print(sensorValue);

  Serial.print("   ADC Voltage: ");
  Serial.print(voltage);
  Serial.print("V");

  Serial.print("   Current: ");
  Serial.print(current);
  Serial.println("A");
}


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/*
  ACS712 Current Sensor


*/


void setup() {
  Serial.begin(9600); //Start Serial Monitor to display current read value on Serial monitor
}

void loop() {
unsigned int x=0;
float AcsValue=0.0,Samples=0.0,AvgAcs=0.0,AcsValueF=0.0;

  for (int x = 0; x < 150; x++){ //Get 150 samples
  AcsValue = analogRead(A0);     //Read current sensor values   
  Samples = Samples + AcsValue;  //Add samples together
  delay (3); // let ADC settle before next sample 3ms
}
AvgAcs=Samples/150.0;//Taking Average of Samples

//((AvgAcs * (5.0 / 1024.0)) is converitng the read voltage in 0-5 volts
//2.5 is offset(I assumed that arduino is working on 5v so the viout at no current comes
//out to be 2.5 which is out offset. If your arduino is working on different voltage than
//you must change the offset according to the input voltage)
//0.185v(185mV) is rise in output voltage when 1A current flows at input
AcsValueF = (2.5 - (AvgAcs * (5.0 / 1024.0)) )/0.185;

Serial.print(AcsValueF);//Print the read current on Serial monitor
delay(50);
}