功能介绍：
0.本系统采用STC89C52作为单片机
1.LCD1602液晶实时显示当前温湿度/烟雾浓度，同时WIFI串口上报
2.当温湿度或烟雾浓度超过设定阈值时，向WIFI串口发送报警信息
3.通过WIFI串口发送命令可更改设定阈值
*T=xx# 设定温度阈值，xx为数字
*R=xx# 设定湿度阈值，xx为数字
*S=xx# 设定烟雾浓度阈值，xx为数字
4.采用DC002作为电源接口可直接输入5V给整个系统供电
原理图：
PCB ：
主程序：
#include <reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义#include <stdio.h>#include "delay.h"#include "tlc0832.h"#include "oled_iic.h"#include "dht11.h"/************************* 变量定义 *************************/int smog = 0;unsigned char tempMax = 30; //温度上限unsigned char RHMax = 70; //湿度上限unsigned char smogMax = 20; //烟雾浓度上限char dis0[16]; //定义显示区域临时存储数组bit refreshFlag = 1; //刷新标志unsigned char setIndex = 0;/************************* 函数声明 *************************/void Timer0_Init(void); //函数声明void KeyProcess(void); //按键处理void UART_Init(void); //串口初始化void UART_SendByte(unsigned char dat); //串口发送单字节数据void UART_SendStr(unsigned char *s, unsigned char length); //发送定长度字符串void SendData(void); //WIFI串口发送数据void main(void){/************************* 初始化 *************************/Timer0_Init();OLED_Init();OLED_Clear();UART_Init();/************************* 读取数据 *************************/DHT11_0_ReadData();smog = (100 * (ReadADC(AIN0_GND) - 29)) / 227; //计算烟雾浓度百分比if (smog < 0){smog = 0;}/************************* 显示 *************************/sprintf(dis0, "T:%3d", (int)U8T_data_H);OLED_ShowString(0, 0, dis0, FONT_1608); //显示温度OLED_ShowWord(5 * 8, 0, 0); //显示摄氏度sprintf(dis0, " Max:%2d", (int)tempMax);OLED_ShowString(7 * 8, 0, dis0, FONT_1608); //显示温度阈值OLED_ShowWord(14 * 8, 0, 0);//显示摄氏度sprintf(dis0, "RH:%3d%%", (int)U8RH_data_H); //显示湿度OLED_ShowString(0, 2, dis0, FONT_1608);sprintf(dis0, " Max:%3d%%", (int)RHMax); //显示湿度阈值OLED_ShowString(7 * 8, 2, dis0, FONT_1608);sprintf(dis0, "S:%3d%%", (int)smog); //显示烟雾OLED_ShowString(0, 4, dis0, FONT_1608);sprintf(dis0, " Max:%3d%%", (int)smogMax); //显示烟雾阈值OLED_ShowString(6 * 8, 4, dis0, FONT_1608);/************************* WIFI模式配置 *************************/UART_SendStr("AT+CIPMUX=1\r\n", 13); //打开多连接DelayS(1);UART_SendStr("AT+CIPSERVER=1,8080\r\n", 21); //建立服务 端口号为8080/************************* 主循环 *************************/while (1){if (refreshFlag == 1) //定时刷新屏幕{refreshFlag = 0;DHT11_0_ReadData();smog = (100 * (ReadADC(AIN0_GND)-29)) / 227; //计算烟雾浓度百分比if (smog < 0){smog = 0;}sprintf(dis0, "%3d", (int)U8T_data_H);OLED_ShowString(2*8, 0, dis0, FONT_1608);sprintf(dis0, "%2d", (int)tempMax);OLED_ShowString(12 * 8, 0, dis0, FONT_1608); //显示温度阈值sprintf(dis0, "%3d", (int)U8RH_data_H); //显示湿度OLED_ShowString(3*8, 2, dis0, FONT_1608);sprintf(dis0, "%3d", (int)RHMax); //显示湿度阈值OLED_ShowString(12*8, 2, dis0, FONT_1608);sprintf(dis0, "%3d", (int)smog); //显示烟雾OLED_ShowString(2*8, 4, dis0, FONT_1608);sprintf(dis0, "%3d", (int)smogMax); //显示烟雾阈值OLED_ShowString(11*8, 4, dis0, FONT_1608);SendData();}KeyProcess();}}void Timer0_Init(void){TMOD &= 0xF0;//使用模式1，16位定时器，使用"|"符号可以在使用多个定时器时不受影响TMOD |= 0x01;//使用模式1，16位定时器，使用"|"符号可以在使用多个定时器时不受影响TL0 = 0x00;//设置定时初始值TH0 = 0x4C;//设置定时初始值 50msPT0 = 1; //设置高优先级EA = 1; //总中断打开ET0 = 1; //定时器中断打开TR0 = 1; //定时器开关打开}void Timer0_isr(void) interrupt 1{static unsigned char numCount = 0;TL0 = 0x00;//设置定时初始值TH0 = 0x4C;//设置定时初始值 50msnumCount++;if (numCount > 4){numCount = 0;refreshFlag = 1;}}void SendData(void){char dis[26];UART_SendStr("AT+CIPSEND=0,26\r\n", 17); //发送数据DelayMs(100);sprintf(dis,"T:%3d'C RH:%3d%% S:%3d%%\r\n\r\n", (int)U8T_data_H, (int)U8RH_data_H, (int)smog);UART_SendStr(dis, 26);DelayMs(100);if (U8T_data_H > tempMax) //温度过高{UART_SendStr("AT+CIPSEND=0,27\r\n", 17); //发送数据DelayMs(100);UART_SendStr("Temperature is too high\r\n\r\n", 27);DelayMs(100);}if (U8RH_data_H > RHMax) //湿度过高{UART_SendStr("AT+CIPSEND=0,24\r\n", 17); //发送数据DelayMs(100);UART_SendStr("Humidity is too high\r\n\r\n", 24);DelayMs(100);}if (smog > smogMax) //烟雾浓度过高{UART_SendStr("AT+CIPSEND=0,38\r\n", 17); //发送数据DelayMs(100);UART_SendStr("The smog concentration is too high\r\n\r\n", 38);DelayMs(100);}}/************************* 串口配置 *************************/void UART_Init(void){SCON = 0x50;TH2 = 0xFF;TL2 = 0xFD;// RCAP2H = 0xFF; //(65536-(FOSC/32/BAUD)) BAUD = 9600 FOSC = 11059200// RCAP2L = 0xDC;RCAP2H = 0xFF; //(65536-(FOSC/32/BAUD)) BAUD = 115200 FOSC = 11059200RCAP2L = 0xFD;/*****************/TCLK = 1;RCLK = 1;C_T2 = 0;EXEN2 = 0;/*****************/TR2 = 1;ES = 1; //串口中断EA = 1; //打开总中断}/************************* 串口发送字节 *************************/void UART_SendByte(unsigned char dat) //串口发送单字节数据{unsigned char time_out;time_out = 0;SBUF = dat; //将数据放入SBUF中while ((!TI) && (time_out < 100)) //检测是否发送出去{time_out++;DelayUs10x(2);}//未发送出去 进行短暂延时TI = 0; //清除ti标志}///************************* 串口发送字符串 *************************/void UART_SendStr(unsigned char *s, unsigned char length){unsigned char num;num = 0x00;while (num < length) //发送长度对比{UART_SendByte(*s); //放松单字节数据s++; //指针++num++; //下一个++}}/************************* 串口中断 *************************/void UART_Interrupt(void) interrupt 4 //串行中断服务程序{static unsigned char i = 0;static unsigned char firstBit = 0;static unsigned char R_buf[6];if (RI)//判断是接收中断产生{RI = 0; //标志位清零TR0 = 0;//SBUF = SBUF;if (SBUF == '*') //检查到帧头{firstBit = 1; //接收标志成功i = 0;R_buf[1] = 0;R_buf[2] = 0;R_buf[3] = 0;R_buf[4] = 0;R_buf[5] = 0;}if (firstBit == 1){R_buf[i] = SBUF;i++;if (i == 6 || R_buf[4] == '#' || R_buf[5] == '#') //检测到帧尾{if (i == 5 && R_buf[4] == '#'){if (R_buf[0] == '*' && R_buf[1] == 'T' && R_buf[2] == '='){tempMax = R_buf[3] - '0';}else if (R_buf[0] == '*' && R_buf[1] == 'R' && R_buf[2] == '='){RHMax = R_buf[3] - '0';}else if (R_buf[0] == '*' && R_buf[1] == 'S' && R_buf[2] == '='){smogMax = R_buf[3] - '0';}}else if (i == 6 && R_buf[5] == '#') //检测到帧尾{if (R_buf[0] == '*' && R_buf[1] == 'T' && R_buf[2] == '='){tempMax = (R_buf[3] - '0') * 10 + (R_buf[4] - '0');}else if (R_buf[0] == '*' && R_buf[1] == 'R' && R_buf[2] == '='){RHMax = (R_buf[3] - '0') * 10 + (R_buf[4] - '0');}else if (R_buf[0] == '*' && R_buf[1] == 'S' && R_buf[2] == '='){smogMax = (R_buf[3] - '0') * 10 + (R_buf[4] - '0');}}firstBit = 0;i = 0;}}TR0 = 1;}if (TI)//判断是发送中断产生{TI = 0; //标志位清零}}
仿真演示视频：
/video/BV1AW4y1i7cD/
实物演示视频：
/video/BV1bt4y1L7Ma/
