/*
 * LM35
 * 3 pins Vs, Vout and GND
*/

#define SensorPin A0
int SensorVal;
float temperature;

void readTeamperatue(void);

/*============================================================
 * L298n motor driver
 * Motor A control pins EnA, In1, In2
IN1 IN2 Spinning Direction
Low(0)  Low(0)  Motor OFF
High(1) Low(0)  Forward/clockwise
Low(0)  High(1) Backward/anti-clockwise
High(1) High(1) Motor OFF
 */

#define ENA 3
#define IN1 4
#define IN2 5

void motor_directionspeed(bool in1_val, bool in2_val, int Ena_val);

void setup() {
  Serial.begin(9600);
  Serial.println("Start...");

  pinMode(ENA, OUTPUT);
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);

}

void loop() {
  //LM35 read temp from sensor value
  readTeamperatue();

  //motor control
  int speed;//speed can have a value between 0-256
  if(temperature < 30){
    speed = 0;
  }else if(temperature >150){
    speed = 255;
  }else{
    speed = 200;
  }
  motor_directionspeed(1,0,speed);
  
  // wait
  delay(1000); 
  

}

void readTeamperatue(void){
  SensorVal = analogRead(SensorPin);
  float Vout = (float)SensorVal * (5.0/1024.0);
  temperature = Vout * 100;

  //Print the temperature in Celsius
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print("\xC2\xB0"); // shows degree symbol
  Serial.print("C \n");
}

void motor_directionspeed(bool in1_val, bool in2_val, int Ena_val){
  analogWrite(ENA, Ena_val);
  digitalWrite(IN1, in1_val);
  digitalWrite(IN2, in2_val);
  
  if( (in1_val == 0 && in2_val ==0) || Ena_val == 0){
    Serial.print("Motor off");
  }else if( (in1_val == 1 && in2_val ==1) || Ena_val == 0){
    Serial.print("Motor off");
  }else if( in1_val == 1 && in2_val ==0 && Ena_val> 0){
    Serial.print("Motor on / clockwise direction | ");
    int a = (int)(Ena_val*100)/255;
    Serial.print("Speed: ");
    Serial.print(a);
     Serial.print("%\n");
  }else if( in1_val == 0 && in2_val ==1 && Ena_val> 0){
    Serial.print("Motor on / Anti-clockwise direction | ");
    int a = (int)(Ena_val*100)/255;
    Serial.print("Speed: ");
    Serial.print(a);
     Serial.print("%\n");
  }else{
    Serial.print("Processing");
  }
}