基于STM32CUBEMX+DHT11+LCD1602溫濕度遠程監測系統Proteus仿真

ID:1160531 發表于 2025-11-27 00:10 | 顯示全部樓層 |閱讀模式

項目基于STM32CUBEMX配置環境，結合PROTEUS仿真軟件，實現了STM32F103C8T6實時讀取DHT11溫濕度數據，在串口終端顯示并且在LCD1602液晶屏上進行顯示。對項目的操作步驟進行了詳細記錄，見附件《Proteus stm32f103C8T6_dht11_lcd1602_hal 過程文檔》，完整的工程代碼見附件壓縮包。

仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）

單片機源程序如下:

/* USER CODE BEGIN PV */
uint8_t DHT11Flag = 1; // DHT11Flag==0表示DHT11存在
uint8_t TempData;//溫度數據
uint8_t HumiData;//濕度數據
// 定義全局字符串變量
const char g_send_str[] = "Demo Data Acquisition!\r\n";
const char g_exist_str[] = "DHT11 exist!\r\n";
const char g_no_exist_str[] = "DHT11 not exist!\r\n";
char TempStr[16]; // 用于存儲溫度的字符串形式
char HumiStr[16]; // 用于存儲濕度的字符串形式
uint8_t uart_buf[64]; // 擴大緩沖區預留余量
uint16_t buf_len;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* 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 */
/* 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_TIM1_Init();
/* USER CODE BEGIN 2 */
HAL_UART_Transmit(&huart1,(uint8_t *)&"Demo Data Acquisition!\r\n",25,10);
//串口1輸出打印字符串，25個字符長度，超時時間10ms
LCD_Init();
LCD_Puts(0,0,"DHT11 Data Acquisition!");
HAL_Delay(500);
LCD_Clear();
if(DHT11Flag==1) //先獲得DHT11傳感器響應
{
DHT11_Rst();
DHT11Flag = DHT11_Check();
if(DHT11Flag ==0)
HAL_UART_Transmit(&huart1, (uint8_t *)g_exist_str, strlen(g_exist_str), 10);
else
HAL_UART_Transmit(&huart1, (uint8_t *)g_no_exist_str, strlen(g_no_exist_str), 10);
}
HAL_Delay(500);
/* USER CODE END 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
if(DHT11Flag ==0)
{
if(DHT11_Read_Data(&TempData,&HumiData)==0)//正常讀取DHT11
{
//用len=nsprintf格式化(第二個參數64是緩沖區最大長度，避免溢出)
buf_len = snprintf((char*)uart_buf, sizeof(uart_buf), "Temperature:%d,Humidity:%d\r\n", TempData, HumiData);
//發送（僅發送實際格式化后的長度，而非整個緩沖區）
HAL_UART_Transmit(&huart1, uart_buf, buf_len, HAL_MAX_DELAY);
sprintf(TempStr, "Temperature %d", TempData); // 構造溫度字符串
sprintf(HumiStr, "Humidity %d", HumiData); // 構造濕度字符串
LCD_Puts(0,0,TempStr);
LCD_Puts(0,1,HumiStr);
}
}
HAL_Delay(1000);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}