#define c_sens    A2
float   volt, c_value;

#define dir 7
#define pwm 6
#define slp 10

void start(){
    digitalWrite(dir, HIGH);
    digitalWrite(pwm, HIGH);
    digitalWrite(slp, HIGH);
}
void parar(){
    digitalWrite(dir, LOW);
    digitalWrite(pwm, LOW);
    digitalWrite(slp, LOW);
}

void setup() 
{
    pinMode(c_sens, INPUT);
    pinMode(dir, OUTPUT);
    pinMode(pwm, OUTPUT);
    pinMode(slp, OUTPUT);
    Serial.begin(9600);

parar();
delay(5000);  //durante 5 segundos observe a voltage no pino CS
start();
}
void loop() 
{
    start();
       
  volt = (5.0 / 1023.0)*analogRead(c_sens);// Read the voltage from sensor
  volt = volt - 0.0345 + 0.007; // resultado da leitura do sensor + offset de 50mV do pino CS
  c_value = volt/0.02; // Cálculo da corrente proporcional a voltage do motor

  //Imprime dados via serial
 
  Serial.print("V: ");
  Serial.print(volt,3);
  Serial.print("V   |   I: ");
  Serial.print(c_value,2); 
  Serial.println("A");
  delay(800);

} //end loop