/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2025 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "dht11.h"
#include "stdio.h"
#include <stdlib.h>
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
#include "string.h"
#define RxMaxLen 100
#define timeout 5000
uint8_t RxBuf[100]={0};
uint32_t startTick = 0;
char atMode[] = "AT+CWMODE=1\r\n"; //设置wifi工作模式的AT指令
char atJap[] = "AT+CWJAP=\"HONOR 90\",\"041028ly\"\r\n"; // wifi连接热点的AT指令
char atTcp[] = "AT+CIPSTART=\"TCP\",\"121.37.241.174\",8600\r\n"; //wifi连接云端服务器的AT指令
char atSendConn[] = "AT+CIPSEND=88\r\n"; //wifi上传数据字节数的AT指令
char atJsonConn[] = "{\"t\":1,\"device\":\"esp8266_199\",\"key\":\"39a2825123ad4ff8a4779cbd5fca31b7\",\"ver\":\"v0.0.0.0\"}\r\n"; //wifi连接设备的JSON数据 AT指令
char atSendSens[] = "AT+CIPSEND=53\r\n"; ////wifi上传数据字节数的AT指令
//char atJsonSens[] = "{\"t\":3,\"datatype\":1,\"datas\":{\"temp\":\"12\"},\"msgid\":123}\r\n"; ////wifi给传感器上报数据的JSON AT指令
//给wifi发送AT指令
void SenAtCom(char *str)
{
HAL_UART_Transmit(&huart3,(uint8_t *)str,strlen(str),0xffff);
}
//wifi连接热点函数
void ProjectConn()
{
SenAtCom(atMode);
HAL_Delay(50);
SenAtCom(atJap);
startTick= HAL_GetTick(); //获了系统当前运行时间
while ((HAL_GetTick() - startTick) < timeout) //当所用时间小于退出时间
{
if(strstr((char *)RxBuf,"GOT IP") == RESET) //如没有收到“获得IP”，即如没有连接到热点
{
HAL_Delay(10); //延时
SenAtCom(atJap); //继续连接热点
}
else
{
break; //连接到了，就退出。
}
}
}
//wifi连接服务器函数
void ServerConn()
{
SenAtCom(atMode);
HAL_Delay(50);
SenAtCom(atJap);
HAL_Delay(2000);
SenAtCom(atTcp);
HAL_Delay(50);
}
//串口3接收中断回调处理函数，该函数可以处理不定长度的接收中断
void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
{
if(huart == &huart3)
{
HAL_UART_Transmit(&huart1,RxBuf,sizeof(RxBuf),0xffff); //把串口3接收到的wifi回复，转发到串口1,可以通串口1打印到屏幕
}
memset(RxBuf,0,RxMaxLen);
HAL_UARTEx_ReceiveToIdle_IT(&huart3, RxBuf, RxMaxLen); //接收串口3收到的信息，并再次开启串口3的接收中断
}
/* 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 */
DHT11_Data_TypeDef dht11_rec_buf[]={0,0,0,0,0,0.0,0.0};
int fputc(int ch ,FILE *f)
{
HAL_UART_Transmit(&huart1,(uint8_t *)&ch,1,0xffff);
return ch;
}
typedef struct {
float temperature;
} DHT11RecBuf;
/* 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 */
DHT11RecBuf *dht11_rec_buf = (DHT11RecBuf*)malloc(sizeof(DHT11RecBuf));
/* 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_USART3_UART_Init();
/* USER CODE BEGIN 2 */
DHT11_Init();
HAL_UARTEx_ReceiveToIdle_IT(&huart3, RxBuf, RxMaxLen); //开启串口3的接收中断，仅一次
ProjectConn(); //wifi连接热点
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
char atJsonSens[128];
sprintf(atJsonSens, "{\"t\":3,\"datatype\":1,\"datas\":{\"temp\":\"%.2f\"},\"msgid\":123}\r\n", dht11_rec_buf->temperature);
SenAtCom(atTcp); //连接云端服务器
HAL_Delay(100);
SenAtCom(atSendConn); //发送上传数据的字节数
HAL_Delay(100);
SenAtCom(atJsonConn); //连接云端服务器上的设备
HAL_Delay(2000);
SenAtCom(atSendSens); //发送上传数据的字节数（要与发送的JSON数据字节数完全一致）
HAL_Delay(100);
SenAtCom(atJsonSens); //上传传感器数据
HAL_Delay(3000);
/* USER CODE END WHILE */
free(dht11_rec_buf);
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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