基于STC89C52RC单片机的智能气象站
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演示视频
基于51单片机的智能气象站
主要内容
本次设计了一款基于单片机温湿度 大气压强pm2.5检测装置，该设计可以直接通过dc5v直流直接进行供电，采用STM32单片机作为核心处理器，SHT20温湿度传感器实时检测当前环境的温度和湿度，PM2.5灰尘颗粒传感器实时检测空气中的PM2.5浓度，采用bmp180检测当前的大气压强，按键用于设置pm2.5浓度值上限，。当检测pm2.5超标，，单片机控制蜂鸣器进行报警，进单片机将采集到的的pm2.5值，温度和湿度值显示在LCD1602液晶屏上，实时展示数据的动态变化，通过温湿度的采集显示当前天气下雨的概率。
系统硬件结构设计
硬件包含温湿度传感器、LCD1602显示屏、STM32F103、空气质量传感器Pm2.5、大气压强BMP180传感器实现温度、湿度、大气压强、空气质量的采集等。
系统软件结构设计
实物照片
部分代码
int main(void)
{
u8 i;
u8 keynum = 0;
delay_init(); //延时函数初始化
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
delay_ms(500);
LCD_Init(); //1602初始化
KEY_Init(); //按键初始化
I2C_Configuration();//IIC初始化
SHT2X_Init();//sht20初始化
bh1750_Init();
delay_ms(1000);
IIC_Init(); //IIC初始化
uart_init(2400); //使能串口1
LCD_Write_String(0,0,"Wait GSM Init...");
LCD_Write_String(0,1," ");
while(1)//等待GSM模块连接到基站
{
delay_ms(500);
count123=0;
for(i=0;i<39;i++)
RX_Buffer[i]=0;
sprintf((char*)buff,"AT+CPIN?\r\n");
UART3_SendString(buff);
delay_ms(1000);
if(lianwang==1)
{
LCD_Write_String(0,0,"GSM Success... ");
LCD_Write_String(0,1," ");
delay_ms(1000);delay_ms(1000);
Send_Message();
BEEP = 1;delay_ms(200);
break;
}
}
if(mode == 0)
{
count = 90;
LCD_Write_String(0,0,"Tmp: C Hum: %");
LCD_Write_String(0,1,"P: Kpa G: %");
}
else
{
LCD_Write_String(0,0,"PM2.5: ug/m3 ");
LCD_Write_String(0,1,"max_P: ug/m3 ");
}
while(1)
{
keyscan();//按键扫描
if(count++ >= 150)//延时大概150ms读取一次
{
count = 0;
if(mode == 0)//温湿度气压下雨概率
{
BEEP = 0;
if(SHT2x_Calc_T())//读取温度值
{
temperature = (short)temperatureC;
}
if(SHT2x_Calc_RH())//读取湿度值
{
humidity = (short)humidityRH;
}
//显示温度
LCD_Write_Char(4,0,temperature/10+'0');
LCD_Write_Char(5,0,temperature%10+'0');
//显示湿度
LCD_Write_Char(13,0,humidity/10+'0');
LCD_Write_Char(14,0,humidity%10+'0');
//根据湿度计算下雨概率
if(humidity < 60)
pro = 10;
else if(humidity >= 60 && humidity < 80)
pro = 20;
else if(humidity >= 80 && humidity < 95)
pro = 50;
else if(humidity >= 95)
pro = 99;
//显示概率
LCD_Write_Char(13,1,pro/10+'0');
LCD_Write_Char(14,1,pro%10+'0');
True_Press = Convert_UncompensatedToTrue((long)BMP085_Get_UT(),(long)BMP_UP_Read());//读取气压值
//显示气压
LCD_Write_Char(2,1,True_Press/10000000+'0');
LCD_Write_Char(3,1,True_Press%10000000/1000000+'0');
LCD_Write_Char(4,1,True_Press%1000000/100000+'0');
LCD_Write_Char(5,1,'.');
LCD_Write_Char(6,1,True_Press%100000/10000+'0');
}
else if(mode == 1)//pm2.5
{
if(cnt++ > 200)
{
cnt = 0;
Get_PM();//读取PM2.5值
if(PM25_Value > 999)//超过999，显示 ‘-’
{
LCD_Write_Char(7,0,'-');
LCD_Write_Char(8,0,'-');
LCD_Write_Char(9,0,'-');
}
else
{
//显示PM2.5
LCD_Write_Char(7,0,PM25_Value%1000/100+'0');
LCD_Write_Char(8,0,PM25_Value%100/10+'0');
LCD_Write_Char(9,0,PM25_Value%10+'0');
}
if(PM25_Value >= PM25_Value_max && flag == 0)//PM2.5超限，蜂鸣器报警
{
if(duanxin==1)
duanxin=2;
flag = 1;
if(beep_count++ < 2)
{
BEEP = 1;
}
else
{
BEEP = 0;
if(beep_count > 10)
{
beep_count = 0;
}
}
flag = 0;
}
else
{
duanxin=1;
BEEP = 0;
}
//duanxin状态为 1 2 3
// 2：报警发短信 3：发送完一次短信为3 1：PM2.2低于报警值置1
// 采用三个状态时为了在报警的时候避免重复多次发送短信
if(duanxin==2)//进入发短信标志
Send_Message();
}
}
else if(mode==2)
{
Get_BH1750_Value();//获取光强
guangqiang=lux*100;
LCD_Write_Char(6,1,guangqiang/1000000+'0');
LCD_Write_Char(7,1,guangqiang%1000000/100000+'0');
LCD_Write_Char(8,1,guangqiang%100000/10000+'0');
LCD_Write_Char(9,1,guangqiang%10000/1000+'0');
LCD_Write_Char(10,1,guangqiang%1000/100+'0');
LCD_Write_Char(11,1,'.');
LCD_Write_Char(12,1,guangqiang%100/10+'0');
LCD_Write_Char(13,1,guangqiang%10+'0');
LCD_Write_Char(14,1,'l');
LCD_Write_Char(15,1,'x');
}
}
}
}