技能梳理14@stm32+esp8266+ds18b20+红外传感器+烟雾传感器+CO传感器+蜂鸣器

画板子，有至少8个io口（分别连ds18b20、红外传感器、烟雾传感器、CO传感器，后面3个传感器都是检测到就发高电平），2个串口，1个蜂鸣器，nbiot用的YED-C724 核心板(AIR724) 后改为基于esp8266的nodemcu

1、项目简介

2、实现逻辑

#配置好esp8266，烧录好nodemcu的固件，编写lua脚本，识别固定协议的数据传给onenet
#通过adc检测烟雾值（mq2）
#检测CO（MQ7）
#检测火灾情况（红外传感器）
#检测ds18b20测到的的温度
#进行参数分析，判读是否符合蜂鸣器报警条件
#将参数发送给onenet（通过nodemcu），每5秒一次自动发送
#oled显示各状态参数
#如果烟雾>=1000 ‖ co>=1000 ‖ 温度>=50 ‖ 检测到红外，就蜂鸣器提示，反之不响
#远端网页版加一个红外情况:放一个开关，检测到红外开关变on，反之off。
#火灾情况，放一个开关，烟雾>=1000 ‖ co>=1000 ‖ 温度>=50 ‖ 检测到红外，若这串结果为1开关变

3、应用场景

4、核心代码梳理

//stm32程序
void MQ2_PPM_Calibration(float RS)
{R0 = RS / pow(CAL_PPM / 613.9f, 1 / -2.074f);
}float MQ2_GetPPM(void)
{float Vrl = 3.3f * ADC_num_smoke / 4095.f;float RS = (3.3f - Vrl) / Vrl * RL;if(HAL_GetTick() < 10000){MQ2_PPM_Calibration(RS);}float ppm = 613.9f * pow(RS/R0, -2.074f);return  ppm;
}void MQ7_PPM_Calibration(float RS)
{R0_CO = RS / pow(CAL_PPM_CO / 98.322, 1 / -1.458f);
}// 获取传感器的值
float MQ7_GetPPM(void)
{float Vrl = 33.3f * ADC_num_co/ 4095.f;Vrl = ( (float)( (int)( (Vrl+0.005)*100 ) ) )/100;float RS_CO = (3.3f - Vrl) / Vrl * RL;if(HAL_GetTick() < 10000){MQ7_PPM_Calibration(RS_CO);}float ppm = 98.322f * pow(RS_CO/R0_CO, -1.458f);return  ppm;
}//复位DS18B20
void DS18B20_Rst(void)
{HAL_GPIO_WritePin(DS18B20_GPIO_Port,DS18B20_Pin,GPIO_PIN_RESET); //拉低DQdelay_us(750);    //拉低750usHAL_GPIO_WritePin(DS18B20_GPIO_Port,DS18B20_Pin,GPIO_PIN_SET); //DQ=1delay_us(15);     //15US
}
//等待DS18B20的回应
//返回1:未检测到DS18B20的存在
//返回0:存在
uint8_t DS18B20_Check(void)
{uint8_t retry=0;//SET PB1 INPUTwhile (HAL_GPIO_ReadPin(DS18B20_GPIO_Port,DS18B20_Pin) && retry<200){retry++;delay_us(1);};if(retry>=200)return 1;else retry=0;while (!HAL_GPIO_ReadPin(DS18B20_GPIO_Port,DS18B20_Pin)&&retry<240){retry++;delay_us(1);};if(retry>=240)return 1;return 0;
}
//从DS18B20读取一个位
//返回值：1/0
uint8_t DS18B20_Read_Bit(void)           // read one bit
{uint8_t data;HAL_GPIO_WritePin(DS18B20_GPIO_Port,DS18B20_Pin,GPIO_PIN_RESET);delay_us(2);HAL_GPIO_WritePin(DS18B20_GPIO_Port,DS18B20_Pin,GPIO_PIN_SET);delay_us(12);if(HAL_GPIO_ReadPin(DS18B20_GPIO_Port,DS18B20_Pin))data=1;else data=0;delay_us(50);return data;
}
//从DS18B20读取一个字节
//返回值：读到的数据
uint8_t DS18B20_Read_Byte(void)    // read one byte
{uint8_t i,j,dat;dat=0;for (i=1; i<=8; i++){j=DS18B20_Read_Bit();dat=(j<<7)|(dat>>1);}return dat;
}
//写一个字节到DS18B20
//dat：要写入的字节
void DS18B20_Write_Byte(uint8_t dat)
{uint8_t j;uint8_t testb;for (j=1; j<=8; j++){testb=dat&0x01;dat=dat>>1;if (testb){HAL_GPIO_WritePin(DS18B20_GPIO_Port,DS18B20_Pin,GPIO_PIN_RESET);// Write 1delay_us(2);HAL_GPIO_WritePin(DS18B20_GPIO_Port,DS18B20_Pin,GPIO_PIN_SET);delay_us(60);}else{HAL_GPIO_WritePin(DS18B20_GPIO_Port,DS18B20_Pin,GPIO_PIN_RESET);// Write 0delay_us(60);HAL_GPIO_WritePin(DS18B20_GPIO_Port,DS18B20_Pin,GPIO_PIN_SET);delay_us(2);}}
}
//开始温度转换
void DS18B20_Start(void)// ds1820 start convert
{DS18B20_Rst();DS18B20_Check();DS18B20_Write_Byte(0xcc);// skip romDS18B20_Write_Byte(0x44);// convert
}
//初始化DS18B20的IO口 DQ 同时检测DS的存在
//返回1:不存在
//返回0:存在
uint8_t DS18B20_Init(void)
{DS18B20_Rst();return DS18B20_Check();
}
//从ds18b20得到温度值
//精度：0.1C
//返回值：温度值 （-550~1250）
float DS18B20_Get_Temp(void)
{uint8_t temp;uint8_t TL,TH;short tem;float return_tem;DS18B20_Start();                    // ds1820 start convertDS18B20_Rst();DS18B20_Check();DS18B20_Write_Byte(0xcc);// skip romDS18B20_Write_Byte(0xbe);// convertTL=DS18B20_Read_Byte(); // LSBTH=DS18B20_Read_Byte(); // MSBif(TH>7){TH=~TH;TL=~TL;temp=0;//温度为负} else temp=1;//温度为正tem=TH; //获得高八位tem<<=8;tem+=TL;//获得底八位return_tem = (float)tem*0.625;//转换if(temp)return return_tem; //返回温度值else return -return_tem;
}/* 向onenet平台发数据函数* return 1 ok; 0 fail*/
uint8_t send_onenet(void)
{char text[200];uint8_t len;memset(text, 0, sizeof(text));//组包memset(text, 0, sizeof(text));sprintf(text, "{\"id\": 123,\"dp\": {\"SMOKE\": [{\"v\": %.2f}],\"FIRE\": [{\"v\": %d}],\"RED\": [{\"v\": %d}],\"TEMP\": [{\"v\": %.2f}],\"CO\": [{\"v\": %.2f}]}}",check_smoke, fire_sta, red_sta, check_temp, check_co);//封包len = strlen(text);HAL_UART_Transmit(&huart1, (uint8_t *)text, len, 0xFFFF); //发送return 1;
}/* USER CODE END 0 *//*** @brief  The application entry point.* @retval int*/
int main(void)
{/* USER CODE BEGIN 1 */uint16_t clk, adcBuf[3];tx_nbiot[0] = 0xff;tx_nbiot[1] = 0x74;tx_nbiot[13] = 0xff;/* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_ADC1_Init();MX_USART1_UART_Init();MX_USART3_UART_Init();/* USER CODE BEGIN 2 */OLED_Init();OLED_ColorTurn(0);//OLED_DisplayTurn(0);//OLED_Refresh();OLED_Clear();OLED_ShowString(0,0,"TEMP:    .      C",12);OLED_ShowString(0,10,"CO:        .    PPM",12);OLED_ShowString(0,20,"SMO:       .    PPM",12);OLED_ShowString(0,30,"RED:      ",12);OLED_ShowString(0,40,"FIRE:      ",12);OLED_Refresh();//__HAL_UART_ENABLE_IT(&huart1,UART_IT_RXNE);//open uart1 RXNEHAL_Delay(100);HAL_GPIO_WritePin(GPIOA, BEEP_Pin, GPIO_PIN_SET);DS18B20_Init();/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 *///OLED_Clear();clk++;//nbiot receiveif(rx_ok){//rx_order++;rx_ok = 0;}
//send nbiot/displayif(clk % 20 == 0) //1s -- 10{//check smoke//HAL_ADC_Start_IT(&hadc1);for(uint8_t i=0; i<3; i++){HAL_ADC_Start(&hadc1);HAL_ADC_PollForConversion(&hadc1,0xffff);adcBuf[i]=HAL_ADC_GetValue(&hadc1);}ADC_num_smoke = adcBuf[0];ADC_num_co = adcBuf[1];ADC_num_fire = adcBuf[2];check_smoke = MQ2_GetPPM();intS = (int)check_smoke;float tmp = check_smoke-intS;decS = tmp * 100;OLED_ShowNum(25,20,intS,6,12);OLED_ShowNum(72,20,decS,2,12);//check  CO  //10ppm - 10000ppmcheck_co = MQ7_GetPPM();intCO = (int)check_co;float tmpC0 = check_co-intCO;decCO = tmpC0 * 100;OLED_ShowNum(25,10,intCO,6,12);OLED_ShowNum(72,10,decCO,2,12);//            OLED_ShowNum(39,2,CO>>8,4,12);
//            OLED_ShowNum(80,2,CO&0xff,2,12);//check  fireif(HAL_GPIO_ReadPin(GPIOA,FIRE_DO_Pin)){red_sta = 0;OLED_ShowString(55,30,"NO  ",12);}else{red_sta = 1;OLED_ShowString(55,30,"YES",12);}//check  DS18B20check_temp = DS18B20_Get_Temp()/10;intT = (int)check_temp;          /*合成实际温度整数部分****精度相对上面的更高*/float tem_tmp = check_temp-intT;         /*合成实际温度小数部分*/decT = tem_tmp*100;OLED_ShowNum(40,0,intT,2,12);OLED_ShowNum(60,0,decT,2,12);tx_nbiot[2] = decT;tx_nbiot[3] = tem_tmp;tx_nbiot[4] = CO>>8;tx_nbiot[5] = CO&0xff;tx_nbiot[6] = intS / 256;tx_nbiot[7] = intS % 256;tx_nbiot[8] = decS;tx_nbiot[9] = fire_sta;
//            tx_nbiot[10] = motor_sta;
//            tx_nbiot[11] = alarm_sta;
//            tx_nbiot[12] = beep_sta + 5;//alarmtemp = tx_nbiot[2];hump = tx_nbiot[4];smoke = check_smoke;if((temp > 40) || (CO > 50)){}else{}if(smoke > 300){alarm_smoke = 1;}else if(smoke < 100){alarm_smoke = 0;}else //30-300 fan{alarm_smoke = 0;}if(alarm_smoke || fire_sta)alarm_sta = 1;else alarm_sta = 0;if(alarm_sta)//beep{//                HAL_GPIO_WritePin(GPIOA, BEEP_Pin, GPIO_PIN_RESET); //active}else{//                  HAL_GPIO_WritePin(GPIOA, BEEP_Pin, GPIO_PIN_SET);}if(check_smoke>=1000 || check_co>=1000 || check_temp>=50 || red_sta)//check_smoke, fire_sta, red_sta, check_temp, check_cofire_sta = 1;else fire_sta = 0;if(!fire_sta){OLED_ShowString(55,40,"NO  ",12);HAL_GPIO_WritePin(GPIOA, BEEP_Pin, GPIO_PIN_SET);}else{OLED_ShowString(55,40,"YES",12);HAL_GPIO_WritePin(GPIOA, BEEP_Pin, GPIO_PIN_RESET); //active}}if(clk % 50 == 0) //1s -- 10{send_onenet();//tx onenet data}HAL_Delay(100);OLED_Refresh();}/* USER CODE END 3 */
}//lua脚本
cfg = {}
cfg.ssid = "esp8266"
cfg.pwd = "esp8266test"wifi.setmode(wifi.STATIONAP)
wifi.sta.config(cfg)
wifi.sta.connect()DeviceId = "704xxx0230"
ProductId ="41xxx85"
AuthoTnfo = "96jNf6YzxxxxxSznrgULsQ="
KeepAlive = 200
host = "183.230.40.39"
port = 6002 myClient = mqtt.Client(DeviceId, KeepAlive, ProductId, AuthoTnfo)
--print("115200 8-n-1")
uart.setup(0, 115200, 8, uart.PARITY_NONE, uart.STOPBITS_1, 0)timer1 = tmr.create()timer2 = tmr.create()function ReConnect()if wifi.sta.getip() == nil thenprint("Connect AP,waitting...")elseprint("Connected AP,Success!")--print("IP is:"..wifi.sta.getip())--print("MAC address:"..wifi.sta.getmac())timer1:stop()myClient:connect(host, port, function(client)-- print("Connected OneNET success!")gpio.write(pin,gpio.LOW) end)uart.on("data", function(data) cnt = string.len(data)timer1.stop(1)timer1.interval(1, 1)timer1.start(1)--uart.write(0, data)--print("len:",string.len(data))---print(type(data))if(cnt == 13) thencnt = 0if(string.find(data,"t") == 1) then--print("t!") --print(string.byte(data,2))--print(string.byte(data,3)/100)TEM = string.byte(data,2) + string.byte(data,3)/100HUM = string.byte(data,4) + string.byte(data,5)/100SMOKE = string.byte(data,6)*256 + string.byte(data,7)+ string.byte(data,8)/100LED = string.byte(data,9)MOTOR = string.byte(data,10)ALARM_STA = string.byte(data,11)BEEP_STA = string.byte(data,12)endendUpdate_Message()end, 0)myClient:on("message", function(client , topic , message)--print("get a message.\n")--print(topic..":"..message)print("order:"..message)end)--timer2:alarm(3000, tmr.ALARM_AUTO, Update_Message)end
endtimer1:alarm(1000,tmr.ALARM_AUTO,ReConnect)function Update_Message()info = {}info.tem = TEMinfo.hum = HUMinfo.smoke = SMOKEinfo.led = LEDinfo.motor = MOTORinfo.alarm = ALARM_STAinfo.beep = BEEP_STA --TEM = TEM + 1--HUM = HUM - 1--SMOKE = SMOKE + 0.1ok,message = pcall(cjson.encode, info)--print("message:"..message)header = string.char(3, 0 ,string.len(message))..messagemyClient:publish("$dp", header, 0, 0, function(client)--print("Publish info success!")end)
end

5、部分参考资料

http://www.openedv.com/
https://wiki.openluat.com/
http://wiki.yinerda.com/index.php/YED-C724

6、注意事项

#YED-C724好像不需要物联网卡
#用打火机的气体可以模拟co、烟雾及火灾情况
#烟雾检测的时候前几分钟一般是校准时间
#ESP8266脚本的信息要和远端的onenet上的信息一致

完整可运行项目地址