#include <Servo.h>
#include <SoftwareSerial.h>
#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,3,2);

SoftwareSerial mySerial(6, 7);

char phone_no[]="9131888122";

const int AOUTpin=0;//the AOUT pin of the alcohol sensor goes into analog pin A0 of the arduino
const int DOUTpin=8;//the DOUT pin of the alcohol sensor goes into digital pin D8 of the arduino
const int led=13;//the anode of the LED connects to digital pin D13 of the arduino
const int buzz = 9;
const int servopin = 10;

Servo servo;

int limit;
int value;

void setup() {

lcd.begin(16,2);
  lcd.print(" DARUA DABOCHI ");
  lcd.setCursor(0,1);
  lcd.print("Give Breath Test");
  delay(8000);

mySerial.begin(9600); 
Serial.begin(9600);//sets the baud rate
pinMode(DOUTpin, INPUT);//sets the pin as an input to the arduino
pinMode(led, OUTPUT);//sets the pin as an output of the arduino
pinMode(buzz, OUTPUT);

servo.attach(servopin);
lcd.clear();
}

void loop()
{
value= analogRead(AOUTpin);//reads the analaog value from the alcohol sensor's AOUT pin
limit= digitalRead(DOUTpin);//reads the digital value from the alcohol sensor's DOUT pin
Serial.print("Alcohol value: ");
Serial.println(value);//prints the alcohol value
Serial.print("Limit: ");
Serial.print(limit);//prints the limit reached as either LOW or HIGH (above or underneath)

lcd.setCursor(0,0);
    lcd.print("BAC: ");
    lcd.print(value);
    lcd.print(" mg/L        ");
    lcd.setCursor(0,1);


delay(100);
if (limit == LOW){
digitalWrite(led, LOW);//if limit has been reached, LED turns on as status indicator
digitalWrite(buzz, HIGH);
lcd.print("Alcohol Detected");

delay(3000);
}

else
{
  lcd.print("!!NEUTRAL STATE!!");
digitalWrite(led, HIGH);//if threshold not reached, LED remains off
digitalWrite(buzz, LOW);
}

switch(limit)
{
  case LOW:
  
    SendMessage();
    break;
  }

  if (value < 180)
    {

    lcd.print("YOU CAN DRIVE");
     
    servo.write(90);
    delay(6000);
    servo.write(0);
    }
    else
    {
    servo.write(0);
    }
}

 void SendMessage()


{

  mySerial.println("AT+CMGF=1");    //Sets the GSM Module in Text Mode

  delay(2000);  // Delay of 1000 milli seconds or 1 second

  mySerial.print("AT+CMGS=\""); // Replace x with mobile number
  mySerial.println(phone_no);
  delay(1000);
 
  mySerial.println("Driver of car GA05 p7834 found in drunken state.Please call him/her for the safety and help them.");// The SMS text you want to send

  delay(500);

  mySerial.println(char(26));// ASCII code of CTRL+Z

}