在STM32CUBE环境下 使用ESP-01 ESP8266+STM32F407VGT6连接阿里云的具体代码
时间: 2024-03-19 19:45:48 浏览: 69
好的,下面是使用STM32F407VGT6和ESP-01 ESP8266连接阿里云的代码,使用的是STM32CUBE环境。请注意,以下代码仅供参考,需要根据实际情况进行修改和适配。
首先,需要在阿里云的物联网平台上创建设备并获取设备的三元组信息,包括ProductKey、DeviceName和DeviceSecret。同时,需要在阿里云的物联网平台上创建Topic,用于消息的发布和订阅。
然后,在STM32CUBE中创建一个新工程,并配置好所需的外设和引脚。在代码中,我使用了USART2作为与ESP8266通信的串口,并将其连接到STM32的PA3和PA2引脚上。
接下来是代码实现:
```c
#include "main.h"
#include <string.h>
#include <stdio.h>
UART_HandleTypeDef huart2;
char esp_response[100];
char mqtt_topic[100];
char mqtt_msg[100];
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);
static void MX_NVIC_Init(void);
void esp8266_init(void);
void esp8266_send_command(char* command, uint32_t timeout);
void esp8266_connect_wifi(char* ssid, char* password);
void esp8266_mqtt_connect(char* product_key, char* device_name, char* device_secret);
void esp8266_mqtt_publish(char* topic, char* message);
void esp8266_mqtt_subscribe(char* topic);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USART2_UART_Init();
MX_NVIC_Init();
esp8266_init();
esp8266_connect_wifi("your_wifi_ssid", "your_wifi_password");
esp8266_mqtt_connect("your_product_key", "your_device_name", "your_device_secret");
while (1)
{
sprintf(mqtt_topic, "/%s/%s/update", "your_product_key", "your_device_name");
sprintf(mqtt_msg, "{\"id\":123,\"params\":{\"test\":%d}}", 1);
esp8266_mqtt_publish(mqtt_topic, mqtt_msg);
HAL_Delay(1000);
}
}
void esp8266_init(void)
{
HAL_Delay(5000);
esp8266_send_command("AT\r\n", 1000);
esp8266_send_command("AT+CWMODE=1\r\n", 1000);
esp8266_send_command("AT+CIPMUX=0\r\n", 1000);
}
void esp8266_send_command(char* command, uint32_t timeout)
{
memset(esp_response, 0, sizeof(esp_response));
HAL_UART_Transmit(&huart2, (uint8_t*)command, strlen(command), 1000);
HAL_UART_Receive(&huart2, (uint8_t*)esp_response, sizeof(esp_response), timeout);
}
void esp8266_connect_wifi(char* ssid, char* password)
{
char command[100];
sprintf(command, "AT+CWJAP=\"%s\",\"%s\"\r\n", ssid, password);
esp8266_send_command(command, 5000);
}
void esp8266_mqtt_connect(char* product_key, char* device_name, char* device_secret)
{
char command[100];
sprintf(command, "AT+TCPSTART=\"%s.iot-as-mqtt.cn-shanghai.aliyuncs.com\",1883\r\n", product_key);
esp8266_send_command(command, 5000);
HAL_Delay(1000);
sprintf(command, "AT+MQTTSTART\r\n");
esp8266_send_command(command, 5000);
HAL_Delay(1000);
sprintf(command, "AT+MQTTACCQ=0,\"%s|%s|0|%d\",60,1,\"%s\"\r\n", product_key, device_name, 0, device_secret);
esp8266_send_command(command, 5000);
HAL_Delay(1000);
}
void esp8266_mqtt_publish(char* topic, char* message)
{
char command[100];
sprintf(command, "AT+MQTTPUB=\"%s\",0,0,0,\"%s\"\r\n", topic, message);
esp8266_send_command(command, 5000);
}
void esp8266_mqtt_subscribe(char* topic)
{
char command[100];
sprintf(command, "AT+MQTTSUB=\"%s\",0\r\n", topic);
esp8266_send_command(command, 5000);
}
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.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 336;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
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_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
{
Error_Handler();
}
}
static void MX_USART2_UART_Init(void)
{
huart2.Instance = USART2;
huart2.Init.BaudRate = 115200;
huart2.Init.WordLength = UART_WORDLENGTH_8B;
huart2.Init.StopBits = UART_STOPBITS_1;
huart2.Init.Parity = UART_PARITY_NONE;
huart2.Init.Mode = UART_MODE_TX_RX;
huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
if (HAL_UART_Init(&huart2) != HAL_OK)
{
Error_Handler();
}
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_2|GPIO_PIN_3, GPIO_PIN_RESET);
GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
static void MX_NVIC_Init(void)
{
HAL_NVIC_SetPriority(USART2_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART2_IRQn);
}
void USART2_IRQHandler(void)
{
HAL_UART_IRQHandler(&huart2);
}
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
// TODO: 处理ESP8266返回的数据
}
```
在上述代码中,我们使用了esp8266_send_command()函数来向ESP8266发送AT指令,并使用HAL_UART_Receive()函数来接收ESP8266的响应。在esp8266_mqtt_connect()函数中,我们使用了阿里云提供的MQTT连接流程,包括建立TCP连接、启动MQTT服务、申请MQTT连接、设置连接参数等步骤。在esp8266_mqtt_publish()函数中,我们使用了阿里云提供的MQTT发布消息流程,将消息发布到指定的Topic上。
在main函数中,我们先初始化ESP8266,连接到WiFi网络,然后连接到阿里云的物联网平台,最后使用esp8266_mqtt_publish()函数发布消息到指定的Topic上。
需要注意的是,在HAL_UART_RxCpltCallback()函数中,我们需要对ESP8266返回的数据进行处理。具体实现方式取决于你所使用的ESP8266模块和阿里云的物联网平台。
希望这份代码能对你有所帮助!
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