unsigned char relaySwitch = D8;
int currentSensor = A0;
bool switchOn = false;


void toggleSwitch();
double getCurrentValue();


void setup() {
  pinMode(relaySwitch, OUTPUT);
  Serial.begin(9600);
}

// the loop function runs over and over again forever
void loop() {

    if(Serial.available() > 0)
    {
      char incByte;
      incByte = Serial.read();

      if(incByte == 't')
      {
        toggleSwitch();
      }

    }

    Serial.println("\nSwitch: ");
    Serial.println(switchOn);
    Serial.println("\nCurrent: ");
    Serial.println(getCurrentValue());
    delay(2000);


  }

void toggleSwitch()
{
  if(switchOn == false)
  {
    digitalWrite(relaySwitch,HIGH);
    switchOn = true;
  }
  else
  {
    digitalWrite(relaySwitch,LOW);
    switchOn = false;
  }
}

 double getCurrentValue()
 {

     return double(analogRead(currentSensor));
 }