const int controlPin1 = 2;
const int controlPin2 = 3;
const int enablePin = 6;//green wire on the H bridge6
const int directionSwitchPin = 13;
const int onOffSwitchStateSwitchPin = 12;
const int potPin = A1; //this is the potentiometer pin
const int led = 5; 
const int redled = 7;
int temp = A0;


int onOffSwitchState = 0;
int previousOnOffSwitchState = 0;
int directionSwitchState = 0;
int previousDirectionSwitchState = 0;


int motorEnabled = 0;
int motorSpeed = 0;
int motorDirection = 0; 
  
void setup()
{
 pinMode(controlPin1, OUTPUT);
 pinMode(controlPin2, OUTPUT); 
 pinMode(enablePin, OUTPUT); 
 pinMode(directionSwitchPin,INPUT); 
 pinMode(onOffSwitchStateSwitchPin,INPUT);
 pinMode(led, INPUT);
 pinMode(redled, OUTPUT);
  pinMode(temp, INPUT);
   digitalWrite(enablePin,LOW);//The motor then intializes at OFF
  Serial.begin(9600); 
}


void loop()
{
int temp = analogRead(A0);
temp = map(((analogRead(A0) - 20) * 3.04), 0, 1023, -40, 125);
Serial.print("Temperature: ");
Serial.print(temp);
Serial.println(" C");
  
  if (temp>40) {
 Serial.println("Fan Auto Shutdown");
 digitalWrite(controlPin1, LOW);
 digitalWrite(controlPin2, LOW);
 } else if (temp<20) {
   Serial.println("Fan Auto Shutdown");
   digitalWrite(controlPin1, LOW);
   digitalWrite(controlPin2, LOW);
   } else if(digitalRead(led) == HIGH){
   Motor_Pot();
   MotorControl();
   digitalWrite(redled, LOW);
    }else{
      digitalWrite(redled, HIGH);
   }
  previousDirectionSwitchState = directionSwitchState;
  previousOnOffSwitchState = onOffSwitchState;
}




void Motor_Pot()
{
 onOffSwitchState = digitalRead(onOffSwitchStateSwitchPin);
 delay(1);
 
 directionSwitchState = digitalRead(directionSwitchPin);
 motorSpeed = analogRead(potPin)/4;


 if(onOffSwitchState != previousOnOffSwitchState){
   if(onOffSwitchState == HIGH){
  motorEnabled = !motorEnabled;
  }
 }
}


void MotorControl()
{
 if(directionSwitchState != previousDirectionSwitchState){
   if(directionSwitchState == HIGH){
    motorDirection = !motorDirection;}
    }if(motorDirection == 1){// if the direction is 1, turn left.
       digitalWrite(controlPin1, HIGH);
       digitalWrite(controlPin2, LOW);
     }
    else{//if the direction is 0, turn right.
      digitalWrite(controlPin1, LOW);
      digitalWrite(controlPin2, HIGH);
    }
 if(motorEnabled == 1){
   analogWrite(enablePin, motorSpeed);
   }
   else{
   analogWrite(enablePin, 0); //if the motor is turned off ser EN to low
    }
}