medidor.c

int analogPin = A0;     // potentiometer on educational boosterpack connected to analog pin 5
                       // outside leads to ground and ~3V
int val = 0;           // variable to store the value read
float tensao = 0;
  float somaI, somaV,Irms,Vrms,V2rms,I2rms;
  float VOLT[800];
  float AMP[800];
  float teninst[800];
  float corrinst[800];
  int i;
  float somaInst;
  float soma;
  float FP, S, pot, Q;
void setup()
{
  Serial.begin(9600);

  }

void loop()
{
  somaI=0;
  somaV=0;
  somaInst=0;
  
  Serial.println("Retomando aquisição");
  
  for(i=0;i<800;i++){
                     delayMicroseconds(20.8333);
                     VOLT[i]=analogRead(A0);
                     AMP[i]=analogRead(A1);
                    }
  Serial.println("Carregando...");
  
  for(i=0;i<800;i++){
                     corrinst[i]=(((AMP[i]*3.3)/4096) - 1.60)/5;  // 5 voltas no TC
                     teninst[i]=((VOLT[i]*3.3)/4096) - 1.60;
                     somaInst = somaInst + ((teninst[i]*133.87084)*(corrinst[i]*24.6));  
                     somaI = somaI + corrinst[i]*corrinst[i];
                     somaV=somaV+(teninst[i]*teninst[i]);
                    }
 Irms=sqrt(somaI/800);
 Vrms=sqrt(somaV/800);
 V2rms=Vrms*133.87084;
 I2rms=(Irms*24.6);
 pot=-somaInst/800;
 S=V2rms*I2rms;
 FP=pot/S;
 Q=sqrt((S*S)-(pot*pot));
//val = analogRead(analogPin);
//tensao = (val*3.3)/4096;
//  tensao = map(val, 0, 4096, 0, 3.3);
Serial.println("###################");
Serial.print("Tensão = ");
  Serial.println(V2rms);            
  Serial.print("Corrente = ");
  Serial.println(I2rms);
  Serial.print("Potencia Ativa = ");
  Serial.println(pot);
  Serial.print("Potencia Reativa = ");
  Serial.println(Q);
  Serial.print("Pot Aparente = ");
  Serial.println(S);
  Serial.print("Fator de Potência = ");
  Serial.println(FP);
  Serial.println("###################");
  Serial.println("");
  delay(5000);
    
}