Human Body Infrared Smoke Temperature Alarm System with Ardu

Human Body Infrared Smoke Temperature Alarm System with Arduino, for more details: http://www.instructables.com/id/Human-Body-Infrared-Smoke-Temperature-Alarm-System/


the code is as following:
the receiving part:

/**
  @brief nRF905 RX Demo, by elechouse.
*/
#include <NRF905.h>
#include <SPI.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>

#define BUF_LEN          32
#define CONF_LEN         10

#define NRF905_CSN      4
int num[10]={0};
int count=0;
int count_dis=0;
unsigned char table[10]={'0','1','2','3','4','5','6','7','8','9'};
unsigned char write_config_buf[CONF_LEN]={
    0x76,                   //CH_NO,868.4MHZ
    0x0E,                   //output power 10db, resend disable, Current Normal operation
    0x44,                   //4-byte address
    0x20,0x20,              //receive or send data length 32 bytes
    0xCC,0xCC,0xCC,0xCC,    //receiving address
    0x58,                   //CRC enable,8bit CRC,external clock disable,16MHZ Oscillator
};

unsigned char rx_buf[BUF_LEN]= {0};
unsigned char read_config_buf[CONF_LEN];
unsigned char rx_address[4]= {0xcc,0xcc,0xcc,0xcc};

void putstring(unsigned char *str)
{
    while(*str){
        Serial.write(*str++);
    }
}

LiquidCrystal_I2C lcd(0x27,16,2);
void setup()
{
  //num[0]=12;
    char i;
    pinMode(13, OUTPUT);

  pinMode(22,INPUT);
  pinMode(23,INPUT);
  pinMode(24,INPUT);

  lcd.init();                      // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();

  lcd.setCursor(0,0);
  lcd.print("HELLO!");

    pinMode(10, OUTPUT);        // make sure SPI works
    pinMode(NRF905_CSN,OUTPUT);
    nrf905=NRF905(NRF905_CSN);

    /** pin/port configuration */
    nrf905.init();

    /** register configuration */
    // user self-defined configuration
//  nrf905.write_config(write_config_buf);

    /**
        default configuration, need to specify frequency
        choose Z-Wave frequency band, support :
        US		908.42Mhz
        EUROPE		868.42MHz
        AFRICA		868.42MHz
        CHINA		868.42MHz
        HK		919.82MHz
        JAPAN		853.42MHz
        AUSTRALIA	921.42MHz
        NEW_ZEALAND	921.42MHz
        BRASIL		921.42MHz
        Russia		896MHz
    */
    nrf905.write_config(CHINA);

    /** read register configuration, check register value written */
    nrf905.read_config(read_config_buf);

    /** serial communication configurate */
    Serial.begin(9600);

    /** test configuration */
    for(i=0; i<CONF_LEN; i++){
        Serial.print(read_config_buf[i],HEX);
        Serial.print(' ');
    }

}

void loop()
{

   nrf905.RX(rx_buf);
  //putstring(rx_buf);
  if(*rx_buf)
   {if(rx_buf[0]!='K')
   {

      if(count==10)
      count=0;
      num[count]=((int)rx_buf[0]-48)*10+((int)rx_buf[1]-48);
      //num[0]=12;
       count++;
         digitalWrite(13,HIGH);
 delay(10);
 digitalWrite(13,LOW);
    }
    Serial.write( '*');;
    //Serial.write(table[num[1]/10]);
   //Serial.write( table[num[1]%10]);
   // Serial.write(rx_buf[0]/10);
   // Serial.write( rx_buf[0%10]);
   }
   rx_buf[0]=0;
   rx_buf[1]=0;
  keyscan();

}

void keyscan()
{
  if(digitalRead(22) == LOW)
  {
  count_dis=0;
  //xianshishuzu
  lcd.setCursor(0,0);
  lcd.print("num:T");
  //lcd.print((char)table[count_dis/10]);
  lcd.print((char)table[count_dis%10]);

  lcd.setCursor(12,1);
    lcd.print((char)table[num[count_dis]/10]);
     lcd.print((char)table[num[count_dis]%10]);
  while(!digitalRead(22));
  }

  if(digitalRead(23) == LOW)
  {
  count_dis++;
  if(count_dis==10)
  count_dis=0;
  //xianshishuzu
  lcd.setCursor(0,0);
  lcd.print("num:T");
  //lcd.print((char)table[count_dis/10]);
  lcd.print((char)table[count_dis%10]);

  lcd.setCursor(12,1);
    lcd.print((char)table[num[count_dis]/10]);
     lcd.print((char)table[num[count_dis]%10]);
  while(!digitalRead(23));
  }
  if(digitalRead(24) == LOW)
  {
  //xianshishuz
  num[count_dis]=0;
  count_dis++;
  if(count_dis==10)
  count_dis=0;
  lcd.setCursor(0,0);
  lcd.print("num:T");
  //lcd.print((char)table[count_dis/10]);
  lcd.print((char)table[count_dis%10]);

  lcd.setCursor(12,1);
    lcd.print((char)table[num[count_dis]/10]);
     lcd.print((char)table[num[count_dis]%10]);
  while(!digitalRead(24));
  }
}


the sending part:
/**
  @brief nRF905 TX Demo, by elechouse.
*/

#include <Wire.h>
#include <NRF905.h>
#include <SPI.h>
#include <LiquidCrystal_I2C.h>

#define BUF_LEN          32
#define CONF_LEN         10

#define TrigPin 8
#define EchoPin 9

#define NRF905_CSN       4

unsigned char table[10]={'0','1','2','3','4','5','6','7','8','9'};

unsigned char tx_buf[BUF_LEN]= "";

unsigned char read_config_buf[CONF_LEN];

byte tx_address[4]= {0xcc,0xcc,0xcc,0xcc};

int num=0;
char flag=0;

LiquidCrystal_I2C lcd(0x27,16,2);
void setup()
{
    unsigned char i;
    pinMode(A1,INPUT);
  pinMode(A2,INPUT);
  pinMode(A3,INPUT);
  pinMode(9,INPUT);
  pinMode(13, OUTPUT);

  lcd.init();                      // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();

  lcd.setCursor(0,0);
  lcd.print("HELLO!");

    pinMode(10, OUTPUT);        // make sure SPI works
    pinMode(NRF905_CSN,OUTPUT);
    nrf905=NRF905(NRF905_CSN);

    nrf905.init();
    /** register configuration */
    // user self-defined configuration
//    nrf905.write_config(write_config_buf);

    /**
        default configuration, need to specify frequency
        choose Z-Wave frequency band, support :
        US		908.42Mhz
        EUROPE		868.42MHz
        AFRICA		868.42MHz
        CHINA		868.42MHz
        HK		919.82MHz
        JAPAN		853.42MHz
        AUSTRALIA	921.42MHz
        NEW_ZEALAND	921.42MHz
        BRASIL		921.42MHz
        Russia		896MHz
    */
    nrf905.write_config(CHINA);
    nrf905.read_config(read_config_buf);

    Serial.begin(9600);

    for(i=0; i<10; i++)
    {
        Serial.print(read_config_buf[i],HEX);
        Serial.print(' ');
    }

    tx_buf[12] = '0';
}

void loop()
{
  keyscan();
  num_send();
    delay(15);

}

void keyscan()
{
  if(digitalRead(A1) == LOW)
  {
    flag=0;
  //xainshicall
  lcd.setCursor(0,0);
    lcd.print("num:");
   lcd.print((char)table[num/10]);
    lcd.print((char)table[num%10]);
    lcd.setCursor(9,1);
    lcd.print("call   ");
  while(!digitalRead(A1));
  }
  if(digitalRead(A2) == LOW)
  {
  num++;
  lcd.setCursor(0,0);
    lcd.print("num:");
    lcd.print((char)table[num/10]);
    lcd.print((char)table[num%10]);
  while(!digitalRead(A2));
  }
  if(digitalRead(A3) == LOW)
  {
  num--;
  lcd.setCursor(0,0);
    lcd.print("num:");
    lcd.print((char)table[num/10]);
    lcd.print((char)table[num%10]);
  while(!digitalRead(A3));
  }
  if(digitalRead(9) == LOW)
  {
    flag=1;
    lcd.setCursor(0,0);
    lcd.print("num:");
    lcd.print((char)table[num/10]);
    lcd.print((char)table[num%10]);

    //xianshicalling
    lcd.setCursor(9,1);
    lcd.print("calling");
  while(!digitalRead(9));
  }
}

void num_send()
{
  if(flag==1)
  {
   flag=0;

    tx_buf[0]=table[num/10];
tx_buf[1]=table[num%10];
     nrf905.TX(tx_buf);
  }
if(flag==0)
  {
    tx_buf[0]='K';
    tx_buf[1]=1;
     nrf905.TX(tx_buf);
     delay(10);
  }
}