【单片机毕业设计选题24003】-基于STM32和阿里云的家庭安全监测系统

系统功能:

此设计采用STM32单片机采集环境温湿度,烟雾浓度和一氧化碳浓度显示在OLED上，并将这些信息上报至阿里云平台。

1. 上电连接手机热点后自动连接阿里云，可通过阿里云平台收到系统上报的温湿度，烟雾

浓度，一氧化碳数据以及系统状态信息，并可以通过阿里云下发风扇开关命令。

2. 硬件系统包含四个机械按键，第一个按键为系统显示界面切换，第二个和第三个按键

为当前显示界面的设定阈值增减，第四个按键为手动开启/关闭风扇。

3. 系统有三个显示界面，第一个界面显示温湿度/继电器状态/系统状态，第二个界面

显示烟雾传感器设定阈值及状态，第三个界面显示一氧化碳传感器设定阈值及状态。系统功能框图:

资料获取方法

主要功能模块原理图

系统主要功能模块代码

初始化代码:

  /* USER CODE BEGIN 1 */


  /* USER CODE END 1 */


  /* MCU Configuration--------------------------------------------------------*/


  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */

  HAL_Init();


  /* USER CODE BEGIN Init */

    InitVar();


  /* 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_USART1_UART_Init();

  MX_USART2_UART_Init();

  MX_ADC1_Init();

  /* USER CODE BEGIN 2 */

//uart2打开接收中断

    HAL_UART_Receive_IT(&huart2, (uint8_t*)&uart2RecBuff, 1);

   

    InitOled();

    InitOledDisp();

    ResetDHT11();

//初始化ESP8266

    ESP8266_Init();   

    HAL_Delay(100);

    OledFill(0x00);     //全屏熄灭

ESP8266接入阿里云代码:

//硬件复位ESP8266

    HAL_GPIO_WritePin(ESP8266RST_GPIO_Port, ESP8266RST_Pin, GPIO_PIN_RESET);

         HAL_Delay(250);

    HAL_GPIO_WritePin(ESP8266RST_GPIO_Port, ESP8266RST_Pin, GPIO_PIN_SET);

         HAL_Delay(500);

//关闭板载LED

    HAL_GPIO_WritePin(OnBoardLED_GPIO_Port, OnBoardLED_Pin, GPIO_PIN_SET);

         ESP8266_Clear();

//测试AT指令

         printf("AT Testing\r\n");

         while(ESP8266_SendCmd("AT\r\n", "OK", 200))

         {

                  HAL_Delay(1000);

         }

         HAL_GPIO_TogglePin(OnBoardLED_GPIO_Port, OnBoardLED_Pin); 

         HAL_Delay(500);

//设置为Station   

         printf("set CWMODE\r\n");

         while(ESP8266_SendCmd("AT+CWMODE=1\r\n", "OK", 200))

         {

                  HAL_Delay(1000);

         }

         HAL_GPIO_TogglePin(OnBoardLED_GPIO_Port, OnBoardLED_Pin); 

         HAL_Delay(500);

//上电不自动连接AP

         printf("set CWAUTOCONN\r\n");

         while(ESP8266_SendCmd("AT+CWAUTOCONN=0\r\n", "OK", 200))

         {

                  HAL_Delay(1000);

         }

         HAL_GPIO_TogglePin(OnBoardLED_GPIO_Port, OnBoardLED_Pin); 

         HAL_Delay(500);

//关闭回显

    printf("set ATE0\r\n");

    while(ESP8266_SendCmd("ATE0\r\n", "OK", 200))

    {

        HAL_Delay(1000);

    }

    HAL_GPIO_TogglePin(OnBoardLED_GPIO_Port, OnBoardLED_Pin);  

    HAL_Delay(500);

//配置WIFI

         printf("set Wifi\r\n");

         while(ESP8266_SendCmd("AT+CWJAP=\""WIFI_SSID"\",\""WIFI_PASSWD"\"\r\n", "OK", 500))

         {

                  HAL_Delay(1000);

    }      

         HAL_GPIO_TogglePin(OnBoardLED_GPIO_Port, OnBoardLED_Pin);

         HAL_Delay(500);

//MQTT USER CONFIG

    printf("mqtt config\r\n");

    while(ESP8266_SendCmd("AT+MQTTUSERCFG=0,1,\""MQTT_CLIENT_ID"\",\""MQTT_USER_NAME"\",\""MQTT_PASSWD"\",0,0,\"\"\r\n", "OK", 500))

    {

        HAL_Delay(1000);

    }  

    HAL_GPIO_TogglePin(OnBoardLED_GPIO_Port, OnBoardLED_Pin);

    HAL_Delay(1000);

//MQTT连接服务器

    printf("mqtt broker\r\n");

    while(ESP8266_SendCmd("AT+MQTTCONN=0,\""BROKER_ASDDRESS"\",1883,0\r\n", "OK", 500))

    {

        HAL_Delay(1000);

    }  

    HAL_GPIO_TogglePin(OnBoardLED_GPIO_Port, OnBoardLED_Pin);

HAL_Delay(500);

读传感器数据:

//读传感器值，AD值

void ReadSensorVal(void)

{

//获取温度值

    getTempVal = DHT11_Data.temp_int;

//获取湿度值

    getHumiVal = DHT11_Data.humi_int;

//获取烟雾传感器值

    getMQ2Val = ReadADCChannel(ADC_CHANNEL_4);

//获取一氧化碳传感器值

    getMQ7Val = ReadADCChannel(ADC_CHANNEL_5);

//烟雾和一氧化碳超标后需打开风扇，自动开风扇

    if((getMQ2Val>setMQ2Val)||(getMQ7Val>setMQ7Val))

    {

        relayState = true; 

        RELAY_ON();

    }

    else

    {

        relayState = false;

    }

//四个传感器值中任意一个超标都报警

    if((getMQ2Val>setMQ2Val)||(getMQ7Val>setMQ7Val)

        ||(getTempVal>setTempVal)||(getHumiVal>setHumiVal))

    {

        sysAlarm = true;

        BUZZER_ON();

    }

    else

    {

        sysAlarm = false;

        BUZZER_OFF();

    }

}