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WIFI 开关

news 2024/11/23 14:25:09

esp32  作为http  ap  server 控制led  。

esp32c3  作为遥控器，按下gpio4脚接高电平，唤醒深度睡眠的c3, 连接服务器，发送/open.

此无线开关高度低功耗，因为c3采用深度睡眠，平时功耗只有几微安。就是双方wifi连接时间有5至10秒左右时间。

遥控器端有led显示，如果没有连接上服务器，led灯一直点亮

如果能优化wifi连接的时间缩小为1,2秒左右，此方案就实用化了。

如果使用c3的wifi功能，必须进行电源功耗管理，因为它连接wifi发热太严重了。

1. led服务器端


#include <stdio.h>
#include <string.h>
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "esp_http_server.h"
#include "driver/gpio.h"
#define WIFI_SSID "ESP32_AP"
#define WIFI_PASS "wz123456"
#define MAX_STA_CONN 4#define GPIO_out  23       //控制led脚
static const char *TAG = "ESP32_AP_HTTP";// HTTP GET 处理程序，响应 "OK"
esp_err_t open_handler(httpd_req_t *req) {char resp_str[21]="led open"; httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");httpd_resp_set_type(req, "text/plain");httpd_resp_send(req, resp_str, HTTPD_RESP_USE_STRLEN); gpio_set_level(GPIO_out,1);vTaskDelay(10000/portTICK_PERIOD_MS);     //led 亮10秒gpio_set_level(GPIO_out,0);return ESP_OK;
}// 配置 HTTP 服务器并注册 URI 处理程序
httpd_handle_t start_webserver(void) {httpd_config_t config = HTTPD_DEFAULT_CONFIG();httpd_handle_t server = NULL;if (httpd_start(&server, &config) == ESP_OK) {httpd_uri_t ok_uri = {.uri       = "/open",.method    = HTTP_GET,.handler   = open_handler,.user_ctx  = NULL};httpd_register_uri_handler(server, &ok_uri);}return server;
}// 初始化 AP 模式
void wifi_init_softap() {wifi_config_t wifi_config = {.ap = {.ssid = WIFI_SSID,.ssid_len = strlen(WIFI_SSID),.password = WIFI_PASS,.max_connection = MAX_STA_CONN,.authmode = WIFI_AUTH_WPA_WPA2_PSK,.channel = 6,},};if (strlen(WIFI_PASS) == 0) {wifi_config.ap.authmode = WIFI_AUTH_OPEN;}ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_AP, &wifi_config));ESP_ERROR_CHECK(esp_wifi_start());ESP_LOGI(TAG, "AP initialized. SSID:%s password:%s", WIFI_SSID, WIFI_PASS);
}void app_main(void) {gpio_config_t io_conf = {};      io_conf.intr_type = GPIO_INTR_DISABLE;io_conf.mode = GPIO_MODE_OUTPUT;io_conf.pin_bit_mask = 1ULL<<GPIO_out;  io_conf.pull_down_en = 0;io_conf.pull_up_en = 0;gpio_config(&io_conf);esp_err_t ret = nvs_flash_init();if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {ESP_ERROR_CHECK(nvs_flash_erase());ret = nvs_flash_init();}ESP_ERROR_CHECK(ret);ESP_ERROR_CHECK(esp_netif_init());ESP_ERROR_CHECK(esp_event_loop_create_default());esp_netif_create_default_wifi_ap();wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();ESP_ERROR_CHECK(esp_wifi_init(&cfg));wifi_init_softap();// 启动 HTTP 服务器start_webserver();
}

2.c3遥控器端


#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/event_groups.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "esp_http_server.h"
#include "esp_timer.h"
#include "driver/gpio.h"
#include "esp_sleep.h"// WiFi 
#define WIFI_SSID "ESP32_AP"
#define WIFI_PASS "wz123456"#include "esp_http_client.h"#define SERVER_IP      "192.168.4.1"
#define URL_OPEN       "http://" SERVER_IP "/open"
#define URL_CLOSE      "http://" SERVER_IP "/close"static const char *TAG = "HTTP_CLIENT";static EventGroupHandle_t s_wifi_event_group;
static const int WIFI_CONNECTED_BIT = BIT0;//----------------------
#define AJ  4          
#define LED 21          //led 不能接入0-10脚static void event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data) {if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {esp_wifi_connect();  // } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {esp_wifi_connect();  // ESP_LOGI(TAG, "...");} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;ESP_LOGI(TAG, "IP: " IPSTR, IP2STR(&event->ip_info.ip));xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);  // 锟斤拷}
}// WiFi 
void wifi_init_sta(void) {s_wifi_event_group = xEventGroupCreate();  // //  NVSesp_err_t ret = nvs_flash_init();if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {ESP_ERROR_CHECK(nvs_flash_erase());ret = nvs_flash_init();}ESP_ERROR_CHECK(ret);//  WiFiESP_ERROR_CHECK(esp_netif_init());ESP_ERROR_CHECK(esp_event_loop_create_default());esp_netif_create_default_wifi_sta();wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();ESP_ERROR_CHECK(esp_wifi_init(&cfg));ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL, NULL));ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL, NULL));//  WiFi wifi_config_t wifi_config = {.sta = {.ssid = WIFI_SSID,.password = WIFI_PASS,.channel = 6,},};ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));  // ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));esp_wifi_set_ps(WIFI_PS_NONE);ESP_ERROR_CHECK(esp_wifi_start());  //  WiFiESP_LOGI(TAG, "WiFi ");
}// HTTP GET 请求函数
void http_get_request(const char *url) {esp_http_client_config_t config = {.url = url,};esp_http_client_handle_t client = esp_http_client_init(&config);// 发送 GET 请求esp_err_t err = esp_http_client_perform(client);if (err !=ESP_OK) {ESP_LOGE(TAG, "HTTP GET request failed: %s", esp_err_to_name(err));}// 关闭客户端esp_http_client_cleanup(client);
}void app_main(void) {// 配置 LED GPIO 为输出模式   gpio 0 脚为1，led 亮gpio_config_t io_conf;io_conf.intr_type = GPIO_INTR_DISABLE;io_conf.mode = GPIO_MODE_OUTPUT;io_conf.pin_bit_mask = (1ULL << LED);io_conf.pull_down_en = 0;io_conf.pull_up_en = 0;gpio_config(&io_conf);gpio_set_level(LED,1);esp_sleep_wakeup_cause_t   hxbz = esp_sleep_get_wakeup_cause();  //取得唤醒的类型，第一次开机类型不属于gpio，led不亮// 判断是否是深度睡眠唤醒if (hxbz == ESP_SLEEP_WAKEUP_GPIO) {    //GPIO唤醒     if条件内的语句就是唤醒后要执行的语句，如连接WiFi都行wifi_init_sta();EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group, WIFI_CONNECTED_BIT, pdFALSE, pdTRUE, portMAX_DELAY);if (bits & WIFI_CONNECTED_BIT) {ESP_LOGI(TAG, "WiFi ok");} else {ESP_LOGI(TAG, "WiFi no");}http_get_request(URL_OPEN);     //关断	} //配置唤醒源gpio_set_level(LED,0);gpio_deep_sleep_hold_dis();	    //在深度睡眠时禁用所有数字gpio pad保持功能。esp_deep_sleep_enable_gpio_wakeup((1ULL<<AJ), ESP_GPIO_WAKEUP_GPIO_HIGH); //highgpio_set_direction(AJ, GPIO_MODE_INPUT);	//GPIO定向，设置为输入或输出GPIO_NUM_4esp_deep_sleep_start();}

3.各种优化后的c3客户端，连接时间少于5秒

#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/event_groups.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "esp_http_server.h"
#include "esp_timer.h"
#include "driver/gpio.h"
#include "esp_sleep.h"
#include "esp_netif.h"// WiFi
#define WIFI_SSID "ESP32_AP"
#define WIFI_PASS "wz123456"// Static IP configuration
#define STATIC_IP      "192.168.4.10"
#define STATIC_GW      "192.168.4.1"
#define STATIC_NETMASK "255.255.255.0"#include "esp_http_client.h"#define SERVER_IP      "192.168.4.1"
#define URL_OPEN       "http://" SERVER_IP "/open"
#define URL_CLOSE      "http://" SERVER_IP "/close"static const char *TAG = "HTTP_CLIENT";static EventGroupHandle_t s_wifi_event_group;
static const int WIFI_CONNECTED_BIT = BIT0;#define AJ  4          
#define LED 21          // LED cannot be connected to pins 0-10static void event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data) {if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {esp_wifi_connect();} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {esp_wifi_connect();ESP_LOGI(TAG, "WiFi disconnected, reconnecting...");} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;ESP_LOGI(TAG, "Static IP: " IPSTR, IP2STR(&event->ip_info.ip));xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);}
}// WiFi Initialization with Static IP
void wifi_init_sta(void) {s_wifi_event_group = xEventGroupCreate();// Initialize NVSesp_err_t ret = nvs_flash_init();if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {ESP_ERROR_CHECK(nvs_flash_erase());ret = nvs_flash_init();}ESP_ERROR_CHECK(ret);// Initialize TCP/IP network interfaceESP_ERROR_CHECK(esp_netif_init());ESP_ERROR_CHECK(esp_event_loop_create_default());esp_netif_t *netif = esp_netif_create_default_wifi_sta();// Stop DHCP clientESP_ERROR_CHECK(esp_netif_dhcpc_stop(netif));// Set static IP configurationesp_netif_ip_info_t ip_info;inet_pton(AF_INET, STATIC_IP, &ip_info.ip);inet_pton(AF_INET, STATIC_GW, &ip_info.gw);inet_pton(AF_INET, STATIC_NETMASK, &ip_info.netmask);ESP_ERROR_CHECK(esp_netif_set_ip_info(netif, &ip_info));wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();ESP_ERROR_CHECK(esp_wifi_init(&cfg));ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL, NULL));ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL, NULL));// WiFi Configurationwifi_config_t wifi_config = {.sta = {.ssid = WIFI_SSID,.password = WIFI_PASS,.channel = 6,.sort_method = WIFI_CONNECT_AP_BY_SIGNAL,.threshold.authmode = WIFI_AUTH_WPA2_PSK,.bssid = { 0xbc,0xdd,0xc2,0xcd,0x26,0xf1 }},};ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));esp_wifi_set_ps(WIFI_PS_NONE);ESP_ERROR_CHECK(esp_wifi_start());ESP_LOGI(TAG, "WiFi initialized with static IP");
}// HTTP GET request function
void http_get_request(const char *url) {esp_http_client_config_t config = {.url = url,};esp_http_client_handle_t client = esp_http_client_init(&config);// Send GET requestesp_err_t err = esp_http_client_perform(client);if (err != ESP_OK) {ESP_LOGE(TAG, "HTTP GET request failed: %s", esp_err_to_name(err));}// Cleanupesp_http_client_cleanup(client);
}void app_main(void) {// Configure LED GPIO as outputgpio_config_t io_conf;io_conf.intr_type = GPIO_INTR_DISABLE;io_conf.mode = GPIO_MODE_OUTPUT;io_conf.pin_bit_mask = (1ULL << LED);io_conf.pull_down_en = 0;io_conf.pull_up_en = 0;gpio_config(&io_conf);gpio_set_level(LED, 1);esp_sleep_wakeup_cause_t hxbz = esp_sleep_get_wakeup_cause();// Check if the wake-up is from deep sleepif (hxbz == ESP_SLEEP_WAKEUP_GPIO) {wifi_init_sta();EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group, WIFI_CONNECTED_BIT, pdFALSE, pdTRUE, portMAX_DELAY);if (bits & WIFI_CONNECTED_BIT) {ESP_LOGI(TAG, "WiFi connected");} else {ESP_LOGI(TAG, "WiFi connection failed");}http_get_request(URL_OPEN);} // Configure wake-up sourcegpio_set_level(LED, 0);gpio_deep_sleep_hold_dis();esp_deep_sleep_enable_gpio_wakeup((1ULL << AJ), ESP_GPIO_WAKEUP_GPIO_HIGH);gpio_set_direction(AJ, GPIO_MODE_INPUT);esp_deep_sleep_start();
}


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