esp32 |
您所在的位置：网站首页 › 通过ssid连接wifi › esp32 |
|
实现模块在smartconfig的基础上，实现掉电自动重连的功能。那么我们势必要将配网的信息存储在NVS中，上电读取，如果得到存储的配网信息，就直接去联网；如果没有，就启动smartconfig配网。 1. app_main 函数修改 void app_main(void) { ESP_ERROR_CHECK( nvs_flash_init() ); //initialise_wifi(); check_wifi_config_in_nvs(); }2.标识是否已经配过网了 typedef enum { wifi_unconfiged = 0, wifi_configed = 0xAA, }wifi_info_storage_t;3.在初始化时，读取NVS是否有配网信息 static void check_wifi_config_in_nvs(void) { nvs_handle_t wificonfig_get_handle; wifi_config_t wifi_config; esp_err_t err; uint8_t u8WifiConfigVal = 0; uint8_t u8Ssid[33] = { 0 }; uint8_t u8Password[65] = { 0 }; size_t Len = 0; uint8_t u8GetWifiFlag = 0; bzero(&wifi_config, sizeof(wifi_config_t)); nvs_open("wificonfig", NVS_READWRITE, &wificonfig_get_handle); nvs_get_u8(wificonfig_get_handle, "WifiConfigFlag", &u8WifiConfigVal); printf("wificonfigval:%X \r\n",u8WifiConfigVal); if (u8WifiConfigVal == wifi_configed) { Len = sizeof(u8Ssid); err = nvs_get_str(wificonfig_get_handle, "SSID", (char *)u8Ssid, &Len); if(err == ESP_OK) { memcpy(wifi_config.sta.ssid, u8Ssid, sizeof(wifi_config.sta.ssid)); ESP_LOGI(TAG, "ssid:%s,len:%d",u8Ssid,Len); u8GetWifiFlag ++; } Len = sizeof(u8Password); err = nvs_get_str(wificonfig_get_handle, "PASSWORD",(char *)u8Password,&Len); if(err == ESP_OK) { memcpy(wifi_config.sta.password, u8Password, sizeof(wifi_config.sta.password)); ESP_LOGI(TAG, "password:%s,len:%d",u8Password,Len); u8GetWifiFlag ++; } nvs_close(wificonfig_get_handle); initialise_wifi(); if(u8GetWifiFlag == 2) { //使用获取的配网信息链接无线网络 ESP_ERROR_CHECK( esp_wifi_disconnect() ); ESP_ERROR_CHECK( esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) ); ESP_ERROR_CHECK( esp_wifi_connect() ); } else { xTaskCreate(smartconfig_example_task, "smartconfig_example_task", 4096, NULL, 3, NULL); } } else { nvs_close(wificonfig_get_handle); initialise_wifi(); xTaskCreate(smartconfig_example_task, "smartconfig_example_task", 4096, NULL, 3, NULL); ESP_LOGI(TAG, "Get WifiConfig Fail,Start SmartConfig......"); } }4.事件函数也做了修改 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) { //不再此处创建空中配网的任务 //xTaskCreate(smartconfig_example_task, "smartconfig_example_task", 4096, NULL, 3, NULL); } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_CONNECTED) { //增加链接上WiFi后的信息提示 ESP_LOGI(TAG, "Wifi Connected!"); } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) { esp_wifi_connect(); xEventGroupClearBits(s_wifi_event_group, CONNECTED_BIT); } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) { xEventGroupSetBits(s_wifi_event_group, CONNECTED_BIT); } else if (event_base == SC_EVENT && event_id == SC_EVENT_SCAN_DONE) { ESP_LOGI(TAG, "Scan done"); } else if (event_base == SC_EVENT && event_id == SC_EVENT_FOUND_CHANNEL) { ESP_LOGI(TAG, "Found channel"); } else if (event_base == SC_EVENT && event_id == SC_EVENT_GOT_SSID_PSWD) { ESP_LOGI(TAG, "Got SSID and password"); smartconfig_event_got_ssid_pswd_t *evt = (smartconfig_event_got_ssid_pswd_t *)event_data; wifi_config_t wifi_config; uint8_t ssid[33] = { 0 }; uint8_t password[65] = { 0 }; bzero(&wifi_config, sizeof(wifi_config_t)); memcpy(wifi_config.sta.ssid, evt->ssid, sizeof(wifi_config.sta.ssid)); memcpy(wifi_config.sta.password, evt->password, sizeof(wifi_config.sta.password)); wifi_config.sta.bssid_set = evt->bssid_set; if (wifi_config.sta.bssid_set == true) { memcpy(wifi_config.sta.bssid, evt->bssid, sizeof(wifi_config.sta.bssid)); } memcpy(ssid, evt->ssid, sizeof(evt->ssid)); memcpy(password, evt->password, sizeof(evt->password)); ESP_LOGI(TAG, "SSID:%s", ssid); ESP_LOGI(TAG, "PASSWORD:%s", password); //存放当前的配网信息 nvs_handle_t wificonfig_set_handle; ESP_ERROR_CHECK( nvs_open("wificonfig",NVS_READWRITE,&wificonfig_set_handle) ); ESP_ERROR_CHECK( nvs_set_u8(wificonfig_set_handle,"WifiConfigFlag", wifi_configed) ); ESP_ERROR_CHECK( nvs_set_str(wificonfig_set_handle,"SSID",(const char *)ssid) ); ESP_ERROR_CHECK( nvs_set_str(wificonfig_set_handle,"PASSWORD", (const char *)password) ); ESP_ERROR_CHECK( nvs_commit(wificonfig_set_handle) ); nvs_close(wificonfig_set_handle); //使用获取的配网信息链接无线网络 ESP_ERROR_CHECK( esp_wifi_disconnect() ); ESP_ERROR_CHECK( esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) ); ESP_ERROR_CHECK( esp_wifi_connect() ); } else if (event_base == SC_EVENT && event_id == SC_EVENT_SEND_ACK_DONE) { xEventGroupSetBits(s_wifi_event_group, ESPTOUCH_DONE_BIT); } }编译当前的代码，烧录后，首次需要通过 smartconfig 或者 airkiss 配网后 再次重启，可以看到直接从NVS中读取配网信息直接连接上了网络。 下一章增加按键和指示灯，按键通过长按清除配网信息，led指示配网状态。 |
| CopyRight 2018-2019 办公设备维修网 版权所有 豫ICP备15022753号-3 |