Initialize the library with the numbers of the interface pins

//include LCD library
#include

// initialize the library with the numbers of the interface pins

//as follow :
//LCD RS pin to digital pin 12
//LCD Enable pin to digital pin 11
//LCD D4 pin to digital pin 5
//LCD D5 pin to digital pin 4
//LCD D6 pin to digital pin 3
//LCD D7 pin to digital pin 2
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

const int temperaturePin = 1; //determined the pin for reading TMP36 sensor

int D1 = 30;
int D2 = 33;
int D3 = 34;
int D4 = 27;

//define motor control lines as pin 3,5 for the direction and 3 for the enable and PWM

const int IN3 = 7;
const int IN4 = 6;
const int ENB = 9;

void setup() {

// set up the LCD's number of columns and rows:
lcd.begin(16, 2);

pinMode(D1, OUTPUT);

pinMode(D2, OUTPUT);
pinMode(D3, OUTPUT);
pinMode(D4, OUTPUT);

//ture the two digit at the left off as we mesure number with max of 2 digit so we didn't need it

digitalWrite(D2, LOW);
digitalWrite(D1, LOW);

//set the pins for motor

pinMode (ENB, OUTPUT);
pinMode(IN3, OUTPUT);
pinMode(IN4, OUTPUT);

Serial.begin(9600);

}

int last_read_of_time = 0;

int TMP_reading = 0;

void loop() {

int time_from_start = millis();

if (abs(last_read_of_time - time_from_start) >= 1000) {

last_read_of_time = millis();
lcd.clear(); // start with a blank screen
TMP_reading = reading_temperature_from_TMP36();
}
int y;
y =TMP_reading;
if(y>=10 && y<=20){
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
analogWrite(ENB,0);
}
else if(y>20 && y<=30){
analogWrite(ENB,63);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW); }
else if(y>30 && y<=40){
analogWrite(ENB,128);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW); }
else if(y>40 && y<=50){
analogWrite(ENB,192);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW); }
else if(y>50){
analogWrite(ENB,255);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
}

lcd.setCursor(0, 1); // set the cursor to column 0, line 1

lcd.print(TMP_reading);//write value on LCD
lcd.display();//display value

}

int reading_temperature_from_TMP36()

{
float voltage, degreesC;
voltage = analogRead(temperaturePin) * 0.004882814;
degreesC = (voltage - 0.5) * 100.0;
return degreesC;
}