基于51单片机GSM模块的家庭防火防盗报警系统
1、具体介绍
本设计由DS18B20温度传感器+MQ-2烟雾传感器+HC-SR501人体红外模块+SIM800C GSM模块+LCD1602显示屏组成。
功能介绍：
（1）可检测环境温度、烟雾浓雾和人体信号并通过显示屏显示；
（2）可通过按键设置报警值，当检测值超过报警值时进行报警；
（3）报警可通过LED+蜂鸣器现场报警，显示屏显示报警内容；还可通过GSM模块实现远程报警，短息可显示不同报警内容。
2、实物图：
3、电路图：
4、部分代码
#include
#include
#include "sim800.h"
#define uchar unsigned char
#define uint unsigned int
#define K_MG_MV 120/66
typedef unsigned char U8; /* defined for unsigned 8-bits integer variable 无符号8位整型变量 */
typedef unsigned int U16; /* defined for unsigned 16-bits integer variable 无符号16位整型变量 */
/********测试GSM是否启动**********/
int test_boot;
/********测试GSM是否注册网络**********/
int test_net_register;
/********GSM串口接收数据缓存**********/
unsigned char idata GSM_receive[60];
/********GSM串口接收计数器**********/
unsigned char GSMDATA_count;
unsigned char *content_temp = "Warning: over temperature\r\n";
unsigned char *content_smoke = "Warning: excessive smoke concentration\r\n";
unsigned char *content_body = "Warning: body entry\r\n";
unsigned char str_yw[12];//烟雾值
unsigned char T_baojing = 30; //温度报警值
unsigned int C_baojing = 500; //烟雾浓度报警值
unsigned char T_buff[3]; //报警缓存
unsigned char H_buff[3];
unsigned char C_buff[4];
bit sf_flag=0; //设防标志
unsigned char moshi=0;
unsigned char data1;
long Value;
sbit bADcs=P3^4;
sbit bADcl=P3^6;
sbit bADda=P3^5;
sbit sf_led = P1^3;// 设防指示灯
sbit shefang= P1^4;// 设防按键
sbit shezhi = P1^5; // 设置
sbit jia = P1^6; // 加
sbit jian = P1^7; // 减
sbit BUZZER = P2^0; // LED蜂鸣器
sbit Infra = P3^2; // 人体红外模块
unsigned char IntToString(unsigned char *str, int dat);
extern bit Start18B20();
extern bit Get18B20Temp(int *temp); // ；；；；；、‘
extern void InitLcd1602();
extern void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str);
float intT, decT; //温度值的整数和小数部分
long kssj() //开始收集
{
unsigned char i;
bADcs = 0;//当ADC0832未工作时其CS输入端应为高电平，此时芯片禁用.
bADcl=0;
bADda=1;
bADcl=1;
bADcl=0;//i down
bADda=1;
bADcl=1;
bADcl=0; // 2 down
bADda=0;
bADcl=1;
bADcl=0; // 3 down
bADda=1;
bADcl=1;
bADcl=0; // 4 down
for(i=8;i>0;i--)
{
data1<<=1;
bADcl=0;
bADcl=1;
if(bADda==1) data1|=0x01;
bADda=1;
}
bADcs=1;
Value=data1*1.0/256*500;
Value=Value*K_MG_MV;
Value=Value-5;
if(Value<0)Value=0;
return Value;
}
void Key_set_scan()
{
if(shezhi==0)
{
Delay_Ms(10);
if(shezhi==0)
{
while(!shezhi);
InitLcd1602(); //初始化液晶
moshi++;
if(moshi >= 3)moshi = 0;
if(moshi == 0)
{
LcdShowStr(0, 0,"T: C");
LcdShowStr(7, 0,"C: PPM");
}
else if(moshi == 1)
{
LcdShowStr(0, 1,"Set_T: C");
}
else if(moshi == 2)
{
LcdShowStr(0, 1,"Set_C: PPM");
}
}
}
if(jia==0)
{
Delay_Ms(10);
if(jia==0)
{
while(!jia);
if(moshi==1)
{
T_baojing++ ;
if( T_baojing>=99 )T_baojing =99;
}
if(moshi==2)
{
C_baojing++ ;
if( C_baojing>=999 )C_baojing =999;
}
}
}
if(jian == 0)
{
Delay_Ms(10);
if(jian == 0)
{
while(!jian);
if(moshi==1)
{
T_baojing-- ;
if( T_baojing<=0 )T_baojing =0;
}
if(moshi==2)
{
C_baojing-- ;
if( C_baojing<=0 )C_baojing =0;
}
}
}
if(shefang == 0)
{
Delay_Ms(10);
if(shefang == 0)
{
while(!shefang);
sf_flag =~ sf_flag;
if(sf_flag == 1) //开启设防
sf_led = 0;
else //关闭设防
{
sf_led = 1;
BUZZER = 1;
}
}
}
}
void wendu()
{
bit res;
int temp; //读取到的当前温度值
unsigned char len;
unsigned char str_wd[5]; //温度缓冲区
Get18B20Temp(&temp); //读取当前温度
res = Get18B20Temp(&temp); //读取当前温度
if (res) //读取成功时，刷新当前温度显示
{
intT = temp >> 4; //分离出温度值整数部分
decT = temp & 0xF; //分离出温度值小数部分
len = IntToString(str_wd, intT); //整数部分转换为字符串
str_wd[len++] = '.'; //添加小数点
decT = (decT*10) / 16; //二进制的小数部分转换为1位十进制位
str_wd[len++] = decT + '0'; //十进制小数位再转换为ASCII字符
str_wd[len] = '\0'; //添加字符串结束符
LcdShowStr(2, 0, str_wd); //显示到液晶屏上
}
Start18B20();
}
/************主函数****************/
void main()
{
unsigned char i;
sf_flag = 0;
Uart_Init();
InitLcd1602(); //初始化液晶
Start18B20();
LcdShowStr(0,0," System init ");
LcdShowStr(0,1," please wait ");
for(i = 0;i < 15;i++)//等待网络稳定
{
Delay_Ms(1000);
}
InitLcd1602();
LcdShowStr(0, 0,"T: C");
LcdShowStr(7, 0,"C: PPM");
// //测试是否已经开机，同时自适应波特率
// while(test_boot==No)
// {
// Send_String("AT\r\n");
// Delay_Ms(100);
// }
// test_boot=No;
//
// //测试是否注册到网络
// while(test_net_register==No)
// {
// Send_String("AT+CREG?\r\n");
// Delay_Ms(100);
// }
// test_net_register=No;
Receive_message(); //配置成接受短信模式
while(1)
{
Key_set_scan();//按键扫描
if(moshi == 0) //设置模式切换
{
kssj(); //开始收集 ,电压采集检测烟雾浓度
Value = Value-100;//烟雾浓度校准
IntToString(str_yw,Value); //转换成字符串
LcdShowStr(9, 0, str_yw); //烟雾浓度显示到液晶屏上
wendu(); //温度检测并显示
if(sf_flag == 1) //当开启设防时
{
if(Value>=C_baojing||intT>T_baojing||Infra==1) //有触发报警
{
BUZZER = 0;
Delay_Ms(1000);
LcdShowStr(0, 1," ");
if(intT > T_baojing)
{ /*1234567890123456*/
LcdShowStr(0,1,"temp");
Send_message(content_temp); //发温度超标短信
} else LcdShowStr(0, 1," ");
if(Value >= C_baojing)
{ /*1234567890123456*/
LcdShowStr(5,1,"smoke");
Send_message(content_smoke); //发烟雾浓度超标短信
} else LcdShowStr(5, 1," ");
if(Infra == 1)
{ /*1234567890123456*/
LcdShowStr(11, 1,"body");
Send_message(content_body); //发人体进入短信
} else LcdShowStr(11,1," ");
}
else //没有触发报警
{
BUZZER = 1; /*1234567890123456*/
LcdShowStr(0, 1," System normal ");
}
}
}
else if(moshi == 1) //设置温度上限模式
{
T_buff[0] = T_baojing/10+0x30;
T_buff[1] = T_baojing%10+0x30;
T_buff[2] = '\0';
LcdShowStr(6, 1,T_buff);
}
else if(moshi == 2) //设置烟雾浓度上限模式
{
C_buff[0] = C_baojing/100+0x30;
C_buff[1] = C_baojing%100/10+0x30;
C_buff[2] = C_baojing%10+0x30;
C_buff[4] = '\0';
LcdShowStr(6, 1,C_buff);
}
}
}
/* 整型数转换为字符串，str-字符串指针，dat-待转换数，返回值-字符串长度 */
unsigned char IntToString(unsigned char *str, int dat)
{
signed char i = 0;
unsigned char len = 0;
unsigned char buf[6];
if (dat < 0) //如果为负数，首先
{
dat = -dat;
*str++ = '-';
len++;
}
do { //先转换为低位在前的十进制数组
buf[i++] = dat % 10;
dat /= 10;
} while (dat > 0);
len += i; //i最后的值就是有效字符的个数
while (i-- > 0) //将数组值转换为ASCII码反向拷贝到接收指针上
{
*str++ = buf[i] + '0';
}
*str = '\0'; //添加字符串结束符
return len; //返回字符串长度
}
/*****************************************************************************
串口中断
/****************************************************************************/
void uart(void) interrupt 4
{
unsigned char UART_data;
if(RI)
{
UART_data=SBUF;
if(UART_data=='\n')
{
if(GSM_receive[0]=='O'&&GSM_receive[1]=='K')
{
test_boot=Yes;
}
//else
// test_boot=No;
if(GSM_receive[0]=='+'&&GSM_receive[1]=='C'&&GSM_receive[2]=='R'&&GSM_receive[3]=='E'&&GSM_receive[4]=='G')
{
if(GSM_receive[7]=='1'||GSM_receive[9]=='1'||GSM_receive[9]=='5')
{
test_net_register=Yes;
}
}
// else
// test_net_register=No;
if((GSM_receive[0]=='O')&&(GSM_receive[1]=='K')) //大写OK
{
// sf_flag = 0;
//sf_led = 1;
//BUZZER = 1;
}
if((GSM_receive[0]=='C')&&(GSM_receive[1]=='L')&&(GSM_receive[2]=='O')&&(GSM_receive[3]=='S')&&(GSM_receive[4]=='E'))
{
// CZ = 1;LcdShowStr(5, 1,"Close");
}
GSMDATA_count=0;
}
else
{
GSM_receive[GSMDATA_count]=UART_data;
GSMDATA_count++;
}
}
RI=0;
}