写一个STM32通过ESP8266模块获取天气的程序
时间: 2024-03-07 12:48:41 浏览: 30
以下是一个基于STM32和ESP8266模块的获取天气的程序示例。这个示例使用了AT指令协议进行通信,使用了OpenWeatherMap的API获取天气数据。
```c
#include "stm32f1xx_hal.h"
#include <stdio.h>
#include <string.h>
UART_HandleTypeDef huart1;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
char buffer[1024];
void sendAT(char* command) {
HAL_UART_Transmit(&huart1, (uint8_t*)command, strlen(command), HAL_MAX_DELAY);
HAL_UART_Transmit(&huart1, (uint8_t*)"\r\n", 2, HAL_MAX_DELAY);
HAL_Delay(500);
}
void readResponse() {
int pos = 0;
memset(buffer, 0, sizeof(buffer));
HAL_UART_Receive(&huart1, (uint8_t*)buffer, sizeof(buffer), HAL_MAX_DELAY);
printf(buffer);
}
void getWeather() {
char command[128];
char* apiKey = "your_api_key_here";
char* city = "your_city_here";
sprintf(command, "AT+CIPSTART=\"TCP\",\"api.openweathermap.org\",80");
sendAT(command);
sprintf(command, "GET /data/2.5/weather?q=%s&appid=%s HTTP/1.1", city, apiKey);
sendAT(command);
sendAT("AT+CIPSEND");
readResponse();
HAL_Delay(1000);
sendAT("AT+CIPCLOSE");
}
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USART1_UART_Init();
while (1)
{
sendAT("AT");
readResponse();
getWeather();
HAL_Delay(10000);
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
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 buses 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();
}
}
static void MX_USART1_UART_Init(void)
{
huart1.Instance = USART1;
huart1.Init.BaudRate = 115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/*Configure GPIO pin : PA0 */
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
```
在这个示例中,我们定义了一些函数来发送AT指令,读取ESP8266的响应和获取天气数据。在主循环中,我们发送“AT”指令和等待响应,以确保ESP8266正常工作。然后,我们使用OpenWeatherMap的API获取天气数据。获取数据后,我们关闭TCP连接并等待一段时间,然后再次开始循环。
请注意,你需要在程序中替换“your_api_key_here”和“your_city_here”为你自己的API密钥和城市名称。
这个示例仅供参考,实际使用时可能需要根据具体情况进行修改。
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