#include "SoftwareSerial.h"

int t;

const int sensor = 52;
int count=0;
int sensorstate=0;
int lastsensorstate=0;
int simstate =0;
char msg;
int xuat;
 #include <LCD.h>
#include <LiquidCrystal.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4 ,5 ,6, 7, 3, POSITIVE);


SoftwareSerial sim808 (10,11);      //Rx Tx
boolean nhan;
String SDT="0901344386";

void setup() {
  // put your setup code here, to run once:
  pinMode (sensor,INPUT);
  sim808.begin(9600);
  // Test call
  at("AT",1000);
  at("ATD"+SDT+";",15000);
  at("ATH",1000);

  //test sms
  at("AT",1000);
  at("AT+CMGF=1",1000);
  at("AT+CSCS=\"GSM\"",1000);
  at("AT+CMGS=\"" + SDT+"\"",2000);

  at("nhan bat ki phim nao de xem so nguoi rua tay",1000);
  sim808.write(26);
  sim808.print("AT+CMGD=1,4");
  sim808.print("AT+CNMI=2,2,0,0,0\r");

  // Deletes all SMS saved in SIM memory
  delay(100);// ctlrZ
  Serial.begin(9600);
  Serial.println("ok");
  lcd.begin(16,2);
  lcd.backlight();
  lcd.setCursor(0,0);

   lcd.print("so nguoi");
}

void loop() {
  sensorstate=digitalRead(sensor);
if (sensorstate!=lastsensorstate){
    if (sensorstate==HIGH){
      count++;
      Serial.println("dang chay");
     Serial.println(count);
      lcd.setCursor(0,1);
      lcd.print(count);
      delay(500);
      Serial.print("1");
      int num=count;
    }
    else{
      Serial.println("off");
    }
}
lastsensorstate=sensorstate;
String xuat =String(count);
sim808.println("AT+CNMI=2,2,0,0,0");
noInterrupts();
 if (sim808.available()>0)
  {
    delay(1000);

    msg=sim808.read();
    Serial.print("hi");
    switch(msg)
    case '1':
    {
    Serial.write(sim808.read());
    at("AT",1000);
    at("AT+CMGF=1",1000);    //Sets the GSM Module in Text Mode  // Delay of 1000 milli seconds or 1 second

    at("AT+CSCS=\"GSM\"",1000);
    at("AT+CMGS=\"" + SDT+"\"",2000); // Replace x with mobile number
    delay(100);
    at("so nguoi:",1000);// The SMS text you want to send
    at(xuat,100);
    sim808.println((char)26);// ASCII code of CTRL+Z
    delay(1000);

    Serial.print("2");
    break;

  }
  }

  interrupts();
  // put your main code here, to run repeatedly:

}
void at(String _atcm,unsigned long _dl){
  sim808.print(_atcm+"\r\n");
  delay(_dl);
}