使用ESP32模块实现数据透传,请提供ESP32的程序
时间: 2024-03-24 22:41:12 浏览: 129
以下是一个简单的ESP32数据透传的程序,其中使用了ESP-IDF框架:
```c
#include <stdio.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "esp_system.h"
#include "esp_wifi.h"
#include "esp_event_loop.h"
#include "esp_log.h"
#include "esp_err.h"
#include "esp_http_client.h"
#define WIFI_SSID "your_wifi_ssid"
#define WIFI_PASS "your_wifi_password"
#define SERVER_URL "http://your_server_url" // 服务器地址
static const char *TAG = "data_passthrough";
static char data_buf[100]; // 数据缓存区
static SemaphoreHandle_t data_mutex; // 数据互斥锁
/* WiFi事件处理程序 */
static esp_err_t wifi_event_handler(void *ctx, system_event_t *event)
{
switch(event->event_id) {
case SYSTEM_EVENT_STA_START:
esp_wifi_connect();
ESP_LOGI(TAG, "WiFi STA started");
break;
case SYSTEM_EVENT_STA_CONNECTED:
break;
case SYSTEM_EVENT_STA_GOT_IP:
ESP_LOGI(TAG, "Got IP: %s", ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));
break;
case SYSTEM_EVENT_STA_DISCONNECTED:
esp_wifi_connect();
break;
default:
break;
}
return ESP_OK;
}
/* HTTP事件处理程序 */
static esp_err_t http_event_handler(esp_http_client_event_t *evt)
{
switch(evt->event_id) {
case HTTP_EVENT_ERROR:
ESP_LOGI(TAG, "HTTP ERROR");
break;
case HTTP_EVENT_ON_CONNECTED:
ESP_LOGI(TAG, "HTTP CONNECTED");
break;
case HTTP_EVENT_ON_FINISH:
ESP_LOGI(TAG, "HTTP FINISHED");
break;
case HTTP_EVENT_ON_DATA:
ESP_LOGI(TAG, "HTTP DATA RECEIVED");
if (evt->data_len < sizeof(data_buf) - 1) {
strncpy(data_buf, (char *)evt->data, evt->data_len);
data_buf[evt->data_len] = '\0';
xSemaphoreGive(data_mutex); // 释放数据互斥锁
}
break;
default:
break;
}
return ESP_OK;
}
/* 数据透传任务 */
static void data_passthrough_task(void *pvParameters)
{
while (1) {
if (xSemaphoreTake(data_mutex, portMAX_DELAY) == pdTRUE) { // 获取数据互斥锁
ESP_LOGI(TAG, "Data received: %s", data_buf);
esp_http_client_config_t config = {
.url = SERVER_URL,
.event_handler = http_event_handler,
};
esp_http_client_handle_t client = esp_http_client_init(&config);
esp_err_t err = esp_http_client_perform(client); // 发送HTTP请求
if (err == ESP_OK) {
ESP_LOGI(TAG, "Data sent to server");
} else {
ESP_LOGI(TAG, "Failed to send data to server");
}
esp_http_client_cleanup(client);
}
}
}
void app_main()
{
// 初始化WiFi
tcpip_adapter_init();
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
esp_wifi_init(&cfg);
esp_wifi_set_mode(WIFI_MODE_STA);
esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config);
esp_wifi_start();
ESP_LOGI(TAG, "WiFi STA configured");
// 注册WiFi事件处理程序
ESP_ERROR_CHECK(esp_event_loop_init(wifi_event_handler, NULL));
// 初始化数据互斥锁
data_mutex = xSemaphoreCreateMutex();
// 创建数据透传任务
xTaskCreate(data_passthrough_task, "data_passthrough_task", 4096, NULL, 5, NULL);
}
```
这个程序首先连接到一个WiFi热点,然后等待从服务器接收数据,一旦接收到数据,就将其发送到指定的服务器地址。可以根据实际需要修改WiFi SSID、密码和服务器地址等参数。
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