——來(lái)自迪文開(kāi)發(fā)者論壇

本期為大家推送迪文開(kāi)發(fā)者論壇獲獎(jiǎng)開(kāi)源案例——基于T5L的便攜功率計(jì)解決方案。該方案通過(guò)智能屏串口進(jìn)行通信，實(shí)時(shí)接收監(jiān)測(cè)到的電流、電壓和功率數(shù)據(jù)，并同步顯示在屏幕上，使用戶(hù)可以直觀地監(jiān)測(cè)電氣參數(shù)狀態(tài)。此外，該方案還支持WiFi聯(lián)網(wǎng)，無(wú)論是手機(jī)、PC還是其他移動(dòng)設(shè)備，用戶(hù)均可輕松訪問(wèn)電氣數(shù)據(jù)，大幅提升了數(shù)據(jù)管理的便捷性與靈活性。適用于電氣工程、智能家居和工業(yè)自動(dòng)化等領(lǐng)域。

    【演示視頻】

完整開(kāi)發(fā)資料含迪文屏DGUS工程資料與C51代碼，獲取方式：

1. 前往迪文開(kāi)發(fā)者論壇獲?。?span style="font-family: 微軟雅黑, "Microsoft YaHei"; text-decoration: underline; line-height: 150%; color: rgb(51, 102, 153); background: rgb(255, 255, 255);">http://inforum.dwin.com.cn:20080/forum.php?mod=viewthread&tid=10600&extra=&_dsign=e227a7c6

2. 微信公眾號(hào)中回復(fù)“便攜功率計(jì)”獲取。

【UI素材展示】

【GUI工程設(shè)計(jì)】

【程序代碼設(shè)計(jì)】

主控板將I2C采集的電流、電壓和功率數(shù)據(jù)，通過(guò)串口發(fā)送給迪文智能屏，同時(shí)通過(guò)UDP將數(shù)據(jù)發(fā)送至上位機(jī)，部分參考代碼如下：

static void wifi_event_handler(void* arg, esp_event_base_t event_base,int32_t event_id, void* event_data)

{

    if (event_id == WIFI_EVENT_AP_STACONNECTED)

    {

       wifi_event_ap_staconnected_t* event = (wifi_event_ap_staconnected_t*) event_data;

       ESP_LOGI(TAG, "station "MACSTR" join, AID=%d",MAC2STR(event->mac), event->aid);

    }

    else if (event_id == WIFI_EVENT_AP_STADISCONNECTED)

    {

       wifi_event_ap_stadisconnected_t* event = (wifi_event_ap_stadisconnected_t*) event_data;

       ESP_LOGI(TAG, "station "MACSTR" leave, AID=%d",MAC2STR(event->mac), event->aid);

    }

}

void wifi_init_softap(void)

{

    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));

    ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,ESP_EVENT_ANY_ID,&wifi_event_handler,NULL,NULL));

    wifi_config_t wifi_config =

    {

    .ap = {

      .ssid = EXAMPLE_ESP_WIFI_SSID,

      .ssid_len = strlen(EXAMPLE_ESP_WIFI_SSID),

      .channel = EXAMPLE_ESP_WIFI_CHANNEL,

      .password = EXAMPLE_ESP_WIFI_PASS,

      .max_connection = EXAMPLE_MAX_STA_CONN,

      .authmode = WIFI_AUTH_WPA_WPA2_PSK

      },

  };

      if (strlen(EXAMPLE_ESP_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, "wifi_init_softap finished. SSID:%s password:%s channel:%d",

  EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS, EXAMPLE_ESP_WIFI_CHANNEL);

    }

esp_ip4_addr_t ip_addr;

static void udp_server_task(void *pvParameters)

{

    // 將IPv4地址轉(zhuǎn)換為字符串格式的IP地址

    char ip_addr_str[INET_ADDRSTRLEN];

    inet_ntoa_r(ip_addr.addr, ip_addr_str, sizeof(ip_addr_str));

    // 設(shè)置廣播地址和接收方的端口號(hào)

    struct sockaddr_in broadcast_addr =

    {

    .sin_addr.s_addr = ip_addr.addr | htonl(0xFF), //廣播地址，其類(lèi)型為uint32_t

    .sin_family = AF_INET,

    .sin_port = htons(BROADCAST_PORT),

    };

     // 將廣播地址轉(zhuǎn)換為字符串

    ESP_LOGI(TAG, "broadcast_addr IP: %s", inet_ntoa(broadcast_addr.sin_addr.s_addr));

    // Create a socket for UDP broadcast

    int broadcast_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

    if (broadcast_socket < 0)

    {

    ESP_LOGE(TAG, "Failed to create socket: %d", broadcast_socket);

    goto error;

    }

    // 設(shè)置套接字選項(xiàng)以啟用地址重用

    int reuseEnable = 1;

    setsockopt(broadcast_socket, SOL_SOCKET, SO_REUSEADDR, &reuseEnable, sizeof(reuseEnable));

    // 使能廣播

    int broadcast_enable = 1;

    if (setsockopt(broadcast_socket, SOL_SOCKET, SO_BROADCAST, &broadcast_enable, sizeof(broadcast_enable)) < 0) {

    ESP_LOGE(TAG, "Failed to enable broadcasting");

    close(broadcast_socket);

    goto error;

    }

    // Send the broadcast message every BROADCAST_INTERVAL_MS milliseconds

    while (1) {

    // 創(chuàng)建一個(gè) JSON 對(duì)象，并添加三個(gè)屬性

    cJSON *json = cJSON_CreateObject();

    cJSON_AddStringToObject(json, "device", "EZPower");

    cJSON_AddStringToObject(json, "ip", ip_addr_str);

    cJSON_AddNumberToObject(json, "port", 3334);

    // 將 JSON 數(shù)據(jù)轉(zhuǎn)換為字符串

    char *json_str = cJSON_Print(json);

    ESP_LOGI(TAG, "Broadcasting message: %s", json_str);

    dwin_screen_send(json_str, strlen(json_str));

    int ret = sendto(broadcast_socket, json_str, strlen(json_str), 0, (struct sockaddr *)&broadcast_addr, sizeof(broadcast_addr));

    if (ret < 0)

    {

      ESP_LOGE(TAG, "Failed to send broadcast message: %d", ret);

    }

    cJSON_Delete(json);

    free(json_str);

    vTaskDelay(2000 / portTICK_PERIOD_MS);

    }

    error:

    vTaskDelete(NULL);

}

void app_main(void)

    {

    //Initialize NVS

    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_LOGI(TAG, "ESP_WIFI_MODE_AP");

    wifi_init_softap();

    ip_addr.addr = 0xFF04A8C0;

    dwin_init();

    xTaskCreate(udp_server_task, "udp_server", 4096, (void*)AF_INET, 5, NULL);

}