四博 AI 智能音箱 4G S3 版本工程落地方案三模联网、远场唤醒、打断播放与 AI 会话框架1. 方案定位四博 AI 智能音箱 4G S3 版本是一套基于ESP32-S3 VB6824 Wi-Fi/BLE/4G的 AI 语音终端方案。它不是传统意义上的蓝牙音箱而是面向家庭、厨房、展厅、户外、门店和 B 端定制场景的联网 AI 音箱。四博模组选型资料中ESP32-S3 系列被定位在音视频 / AI 市场ESPS3-32、ESPS3-32E 系列兼容官方 ESP32-S3 模组封装适合 AI 音箱、AI 相机、多模态设备等产品开发。 四博 AI 方案资料中也明确给出 ESP32-C2/C3/S3 VB6824 语音方案VB6824 可完成音频编解码、AEC、语音唤醒和唤醒词修改让主控芯片专注通信及 UI。本方案采用“三层解耦”架构1. 网络平面Wi-Fi / BLE / 4G2. 语音平面VB6824 / 唤醒 / 打断 / 离线命令3. AI 平面WebSocket / 大模型 / TTS / OTA / 工具调用2. 硬件组合建议主控ESP32-S3R8 / ESPS3-32 N16R8语音VB6824联网Wi-Fi BLE 4G Cat.1音频MIC 功放 喇叭显示LED 灯效 / 小屏 / 点阵屏可选存储16MB Flash 8MB PSRAM电源Type-C / 锂电池 / DC 供电扩展外置经典蓝牙音频芯片 / TF Card / 按键需要特别说明ESP32-S3 原生支持 Wi-Fi BLEBLE 适合配网、绑定、小程序控制如果要实现真正的手机蓝牙音乐播放也就是 A2DP 经典蓝牙音频建议增加外置蓝牙音频芯片或采用 7014 类蓝牙音频方案。四博资料中也单独列出了 7014 蓝牙 PAN AI 手机伴侣方案和 AI 智能音响方案强调可做蓝牙音响、闹钟、声音克隆、声纹识别、APP、小程序和改唤醒词等功能。3. 总体软件框架这次不采用普通while(1)轮询写法而是采用Bus Manager Port Policy的工程结构。sibo_ai_speaker_4g_s3/├── app/│ ├── app_main.c│ ├── app_bus.c│ ├── app_bus.h│ ├── app_fsm.c│ └── app_fsm.h├── board/│ ├── board_config.h│ └── board_init.c├── network/│ ├── net_policy.c│ ├── wifi_port.c│ ├── ble_provision.c│ └── modem_4g_port.c├── voice/│ ├── vb6824_port.c│ ├── voice_cmd_map.c│ └── wakeup_controller.c├── audio/│ ├── audio_route.c│ ├── tts_player.c│ └── prompt_player.c├── ai/│ ├── ai_session.c│ ├── ai_protocol.c│ └── ai_action.c├── ota/│ └── ota_service.c└── ui/├── speaker_ui.c└── led_effect.c核心思想驱动层只负责收发数据Manager 层只负责状态管理Policy 层只负责选择策略App 层只处理业务事件AI 层只处理协议与云端交互。4. board_config.h#pragma once#include driver/gpio.h#include driver/uart.h#define PRODUCT_NAME SIBO_AI_SPEAKER_4G_S3#define DEVICE_ID SIBO_S3_4G_001122334455/* AI Server */#define AI_WS_URI wss://ai.example.com/sibo/speaker/ws/* VB6824 UART */#define VB6824_UART UART_NUM_1#define VB6824_TXD GPIO_NUM_17#define VB6824_RXD GPIO_NUM_18#define VB6824_BAUD 115200/* 4G UART */#define MODEM_UART UART_NUM_2#define MODEM_TXD GPIO_NUM_40#define MODEM_RXD GPIO_NUM_41#define MODEM_PWR GPIO_NUM_42#define MODEM_BAUD 115200/* Audio */#define I2S_BCLK GPIO_NUM_5#define I2S_WS GPIO_NUM_6#define I2S_DOUT GPIO_NUM_7#define I2S_DIN GPIO_NUM_8#define AMP_EN GPIO_NUM_9/* Keys */#define KEY_WAKEUP GPIO_NUM_0#define KEY_VOL_UP GPIO_NUM_10#define KEY_VOL_DOWN GPIO_NUM_11/* Network Policy */#define WIFI_SCORE 100#define MODEM_4G_SCORE 70#define NET_RETRY_INTERVAL_MS 30005. 应用事件总线AI 音箱有大量异步事件网络上线、4G 断线、语音唤醒、播放中打断、AI 返回、TTS 播放完成、OTA 通知。建议统一走事件总线。#pragma once#include stdint.h#include stddef.htypedef enum {BUS_EVT_NONE 0,BUS_EVT_WIFI_UP,BUS_EVT_WIFI_DOWN,BUS_EVT_4G_UP,BUS_EVT_4G_DOWN,BUS_EVT_BLE_CONFIG_OK,BUS_EVT_NET_SELECTED,BUS_EVT_NET_LOST,BUS_EVT_WAKEUP,BUS_EVT_BARGE_IN,BUS_EVT_CMD_CHAT,BUS_EVT_CMD_STOP,BUS_EVT_CMD_VOL_UP,BUS_EVT_CMD_VOL_DOWN,BUS_EVT_CMD_BT_MODE,BUS_EVT_CMD_MUSIC,BUS_EVT_CMD_ALARM,BUS_EVT_AI_CONNECTED,BUS_EVT_AI_DISCONNECTED,BUS_EVT_AI_JSON,BUS_EVT_TTS_START,BUS_EVT_TTS_DONE,BUS_EVT_OTA_NOTIFY,BUS_EVT_OTA_START,BUS_EVT_OTA_DONE,BUS_EVT_OTA_FAIL,} bus_evt_id_t;typedef struct {bus_evt_id_t id;void *payload;size_t length;} bus_evt_t;#include freertos/FreeRTOS.h#include freertos/queue.h#include app_bus.hstatic QueueHandle_t s_bus_queue NULL;void app_bus_init(void){s_bus_queue xQueueCreate(32, sizeof(bus_evt_t));}bool app_bus_post(bus_evt_id_t id, void *payload, size_t length){if (!s_bus_queue) {return false;}bus_evt_t evt {.id id,.payload payload,.length length,};return xQueueSend(s_bus_queue, evt, pdMS_TO_TICKS(20)) pdTRUE;}QueueHandle_t app_bus_queue(void){return s_bus_queue;}6. 三模联网策略Wi-Fi 优先4G 兜底BLE 配网这版代码用“评分制”来选择网络比简单 if/else 更适合后续扩展。typedef enum {NET_IF_NONE 0,NET_IF_WIFI,NET_IF_4G,} net_if_t;typedef struct {bool wifi_ready;bool g4_ready;int wifi_rssi;int g4_csq;net_if_t active;} net_policy_ctx_t;static net_policy_ctx_t s_net;static int net_score_wifi(void){if (!s_net.wifi_ready) {return 0;}if (s_net.wifi_rssi -60) {return 100;} else if (s_net.wifi_rssi -75) {return 85;}return 60;}static int net_score_4g(void){if (!s_net.g4_ready) {return 0;}if (s_net.g4_csq 20) {return 80;} else if (s_net.g4_csq 12) {return 70;}return 50;}static void net_policy_select(void){int wifi_score net_score_wifi();int g4_score net_score_4g();net_if_t next NET_IF_NONE;if (wifi_score g4_score wifi_score 0) {next NET_IF_WIFI;} else if (g4_score 0) {next NET_IF_4G;}if (next ! s_net.active) {s_net.active next;if (next NET_IF_NONE) {app_bus_post(BUS_EVT_NET_LOST, NULL, 0);} else {app_bus_post(BUS_EVT_NET_SELECTED, NULL, 0);}}}void net_policy_on_event(bus_evt_id_t evt){switch (evt) {case BUS_EVT_WIFI_UP:s_net.wifi_ready true;break;case BUS_EVT_WIFI_DOWN:s_net.wifi_ready false;modem_4g_connect_async();break;case BUS_EVT_4G_UP:s_net.g4_ready true;break;case BUS_EVT_4G_DOWN:s_net.g4_ready false;break;case BUS_EVT_BLE_CONFIG_OK:wifi_connect_saved_profile();break;default:break;}net_policy_select();}const char *net_policy_active_name(void){switch (s_net.active) {case NET_IF_WIFI:return wifi;case NET_IF_4G:return 4g;default:return none;}}7. 4G 模块 AT 命令封装#include driver/uart.h#include esp_log.h#include board_config.hstatic const char *TAG MODEM4G;void modem_4g_init(void){uart_config_t cfg {.baud_rate MODEM_BAUD,.data_bits UART_DATA_8_BITS,.parity UART_PARITY_DISABLE,.stop_bits UART_STOP_BITS_1,.flow_ctrl UART_HW_FLOWCTRL_DISABLE,.source_clk UART_SCLK_DEFAULT,};uart_driver_install(MODEM_UART, 4096, 4096, 0, NULL, 0);uart_param_config(MODEM_UART, cfg);uart_set_pin(MODEM_UART, MODEM_TXD, MODEM_RXD,UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);ESP_LOGI(TAG, 4G modem uart initialized);}static void modem_send_line(const char *cmd){uart_write_bytes(MODEM_UART, cmd, strlen(cmd));uart_write_bytes(MODEM_UART, \r\n, 2);}void modem_4g_probe_basic(void){modem_send_line(AT);vTaskDelay(pdMS_TO_TICKS(300));modem_send_line(ATE0);vTaskDelay(pdMS_TO_TICKS(300));modem_send_line(ATCPIN?);vTaskDelay(pdMS_TO_TICKS(300));modem_send_line(ATCSQ);vTaskDelay(pdMS_TO_TICKS(300));modem_send_line(ATCREG?);vTaskDelay(pdMS_TO_TICKS(300));modem_send_line(ATCGATT?);vTaskDelay(pdMS_TO_TICKS(300));}void modem_4g_start_data_call(void){modem_send_line(ATCGDCONT1,\IP\,\cmnet\);vTaskDelay(pdMS_TO_TICKS(500));modem_send_line(ATD*99#);/** 后续进入 PPP* 1. esp_modem 建立 DTE/DCE* 2. esp_netif_attach PPP* 3. 等待 IP_EVENT_PPP_GOT_IP* 4. 成功后 app_bus_post(BUS_EVT_4G_UP)*/}8. VB6824 串口流式解析器上一版是简单判断buf[0] 0xAA真实产品建议写成流式解析器避免串口分包、粘包导致解析失败。协议示例AA 55 LEN CMD PAYLOAD... CHECKSUMtypedef enum {PARSE_WAIT_AA 0,PARSE_WAIT_55,PARSE_WAIT_LEN,PARSE_WAIT_BODY,PARSE_WAIT_SUM,} vb_parse_state_t;typedef struct {vb_parse_state_t state;uint8_t len;uint8_t index;uint8_t cmd;uint8_t body[32];uint8_t sum;} vb_parser_t;static vb_parser_t s_vb_parser;static uint8_t vb_sum_calc(uint8_t len, uint8_t cmd, uint8_t *body){uint8_t sum 0xAA 0x55 len cmd;for (int i 0; i len - 1; i) {sum body[i];}return sum;}static void vb_dispatch_cmd(uint8_t cmd){switch (cmd) {case 0x01:app_bus_post(BUS_EVT_WAKEUP, NULL, 0);break;case 0x02:app_bus_post(BUS_EVT_BARGE_IN, NULL, 0);break;case 0x03:app_bus_post(BUS_EVT_CMD_CHAT, NULL, 0);break;case 0x04:app_bus_post(BUS_EVT_CMD_STOP, NULL, 0);break;case 0x05:app_bus_post(BUS_EVT_CMD_VOL_UP, NULL, 0);break;case 0x06:app_bus_post(BUS_EVT_CMD_VOL_DOWN, NULL, 0);break;case 0x07:app_bus_post(BUS_EVT_CMD_BT_MODE, NULL, 0);break;default:break;}}static void vb_parser_input(uint8_t byte){switch (s_vb_parser.state) {case PARSE_WAIT_AA:if (byte 0xAA) {s_vb_parser.state PARSE_WAIT_55;}break;case PARSE_WAIT_55:if (byte 0x55) {s_vb_parser.state PARSE_WAIT_LEN;} else {s_vb_parser.state PARSE_WAIT_AA;}break;case PARSE_WAIT_LEN:s_vb_parser.len byte;s_vb_parser.index 0;if (s_vb_parser.len 1) {s_vb_parser.state PARSE_WAIT_SUM;} else {s_vb_parser.state PARSE_WAIT_BODY;}break;case PARSE_WAIT_BODY:if (s_vb_parser.index 0) {s_vb_parser.cmd byte;} else {s_vb_parser.body[s_vb_parser.index - 1] byte;}s_vb_parser.index;if (s_vb_parser.index s_vb_parser.len) {s_vb_parser.state PARSE_WAIT_SUM;}break;case PARSE_WAIT_SUM: {uint8_t calc vb_sum_calc(s_vb_parser.len,s_vb_parser.cmd,s_vb_parser.body);if (calc byte) {vb_dispatch_cmd(s_vb_parser.cmd);}memset(s_vb_parser, 0, sizeof(s_vb_parser));s_vb_parser.state PARSE_WAIT_AA;break;}default:s_vb_parser.state PARSE_WAIT_AA;break;}}串口任务void vb6824_task(void *arg){uint8_t buf[64];while (1) {int len uart_read_bytes(VB6824_UART, buf, sizeof(buf), pdMS_TO_TICKS(100));for (int i 0; i len; i) {vb_parser_input(buf[i]);}}}9. 音频状态机远场唤醒 播放中打断typedef enum {AUDIO_IDLE 0,AUDIO_LISTENING,AUDIO_UPLOADING,AUDIO_PLAYING_TTS,AUDIO_BT_MUSIC,AUDIO_INTERRUPTED,} audio_state_t;static audio_state_t s_audio_state AUDIO_IDLE;static int s_volume 70;void audio_set_state(audio_state_t state){s_audio_state state;}void audio_barge_in(void){if (s_audio_state AUDIO_PLAYING_TTS ||s_audio_state AUDIO_BT_MUSIC) {audio_player_stop();s_audio_state AUDIO_INTERRUPTED;speaker_ui_status(已打断请继续说);}}void audio_volume_up(void){if (s_volume 100) {s_volume 5;}audio_player_set_volume(s_volume);}void audio_volume_down(void){if (s_volume 0) {s_volume - 5;}audio_player_set_volume(s_volume);}VB6824 的价值就在这里它把唤醒、AEC、离线命令和抗噪能力前置到语音芯片让 ESP32-S3 主要负责通信、状态机和 AI 协议。四博 AI 开发宝典中提到VB6824 具备更远距离唤醒、更低误唤醒率、更强抗噪能力和更快响应识别时间。10. AI 会话协议设备上线{type: hello,device_id: SIBO_S3_4G_001122334455,product: SIBO_AI_SPEAKER_4G_S3,net: wifi,capability: {wifi: true,ble: true,g4: true,far_field: true,barge_in: true,wake_word: 小博小博}}用户语音请求{type: chat,session_id: session_0001,text: 帮我设置一个晚上八点的提醒,scene: ai_speaker,tts: true}AI 返回{type: ai_result,text: 好的已为你设置晚上八点的提醒。,tts_url: https://cdn.example.com/tts/001.mp3,action: {name: set_alarm,params: {time: 20:00}}}WebSocket 客户端static esp_websocket_client_handle_t s_ws;static void ai_ws_event_handler(void *arg,esp_event_base_t base,int32_t event_id,void *event_data){esp_websocket_event_data_t *data event_data;switch (event_id) {case WEBSOCKET_EVENT_CONNECTED:app_bus_post(BUS_EVT_AI_CONNECTED, NULL, 0);break;case WEBSOCKET_EVENT_DISCONNECTED:app_bus_post(BUS_EVT_AI_DISCONNECTED, NULL, 0);break;case WEBSOCKET_EVENT_DATA:if (data-op_code 0x1) {char *json calloc(1, data-data_len 1);if (json) {memcpy(json, data-data_ptr, data-data_len);app_bus_post(BUS_EVT_AI_JSON, json, data-data_len);}}break;default:break;}}void ai_session_start(void){esp_websocket_client_config_t cfg {.uri AI_WS_URI,.reconnect_timeout_ms 3000,.network_timeout_ms 10000,};s_ws esp_websocket_client_init(cfg);esp_websocket_register_events(s_ws, WEBSOCKET_EVENT_ANY, ai_ws_event_handler, NULL);esp_websocket_client_start(s_ws);}static void ai_send_json(cJSON *root){if (!s_ws || !esp_websocket_client_is_connected(s_ws)) {return;}char *text cJSON_PrintUnformatted(root);if (!text) {return;}esp_websocket_client_send_text(s_ws, text, strlen(text), portMAX_DELAY);cJSON_free(text);}11. 设备 Hello 上报void ai_send_hello(void){cJSON *root cJSON_CreateObject();cJSON_AddStringToObject(root, type, hello);cJSON_AddStringToObject(root, device_id, DEVICE_ID);cJSON_AddStringToObject(root, product, PRODUCT_NAME);cJSON_AddStringToObject(root, net, net_policy_active_name());cJSON *cap cJSON_CreateObject();cJSON_AddBoolToObject(cap, wifi, true);cJSON_AddBoolToObject(cap, ble, true);cJSON_AddBoolToObject(cap, g4, true);cJSON_AddBoolToObject(cap, far_field, true);cJSON_AddBoolToObject(cap, barge_in, true);cJSON_AddStringToObject(cap, wake_word, 小博小博);cJSON_AddItemToObject(root, capability, cap);ai_send_json(root);cJSON_Delete(root);}12. AI 返回解析与 Action 分发static void ai_handle_action(cJSON *action){cJSON *name cJSON_GetObjectItem(action, name);cJSON *params cJSON_GetObjectItem(action, params);if (!cJSON_IsString(name)) {return;}if (strcmp(name-valuestring, set_alarm) 0) {cJSON *time cJSON_GetObjectItem(params, time);if (cJSON_IsString(time)) {alarm_set(time-valuestring);}} else if (strcmp(name-valuestring, play_music) 0) {cJSON *keyword cJSON_GetObjectItem(params, keyword);if (cJSON_IsString(keyword)) {music_search_and_play(keyword-valuestring);}} else if (strcmp(name-valuestring, switch_bt) 0) {audio_route_set_bt_mode(true);}}void ai_parse_json(const char *json){cJSON *root cJSON_Parse(json);if (!root) {return;}cJSON *type cJSON_GetObjectItem(root, type);if (cJSON_IsString(type) strcmp(type-valuestring, ai_result) 0) {cJSON *text cJSON_GetObjectItem(root, text);cJSON *tts cJSON_GetObjectItem(root, tts_url);cJSON *action cJSON_GetObjectItem(root, action);if (cJSON_IsString(text)) {speaker_ui_text(text-valuestring);}if (cJSON_IsString(tts)) {audio_set_state(AUDIO_PLAYING_TTS);tts_player_play_url(tts-valuestring);}if (cJSON_IsObject(action)) {ai_handle_action(action);}}if (cJSON_IsString(type) strcmp(type-valuestring, ota_notify) 0) {cJSON *url cJSON_GetObjectItem(root, firmware_url);if (cJSON_IsString(url)) {char *copy strdup(url-valuestring);app_bus_post(BUS_EVT_OTA_NOTIFY, copy, strlen(copy));}}cJSON_Delete(root);}13. 音频路由AI TTS / 本地提示音 / 蓝牙音频typedef enum {AUDIO_ROUTE_PROMPT 0,AUDIO_ROUTE_AI_TTS,AUDIO_ROUTE_BT_AUDIO,} audio_route_t;static audio_route_t s_route AUDIO_ROUTE_PROMPT;void audio_route_set(audio_route_t route){s_route route;switch (route) {case AUDIO_ROUTE_PROMPT:external_bt_audio_enable(false);amp_enable(true);break;case AUDIO_ROUTE_AI_TTS:external_bt_audio_enable(false);amp_enable(true);break;case AUDIO_ROUTE_BT_AUDIO:external_bt_audio_enable(true);amp_enable(true);audio_set_state(AUDIO_BT_MUSIC);break;}}void audio_route_set_bt_mode(bool enable){if (enable) {audio_route_set(AUDIO_ROUTE_BT_AUDIO);speaker_ui_status(蓝牙音箱模式);} else {audio_route_set(AUDIO_ROUTE_PROMPT);speaker_ui_status(AI 音箱模式);}}14. App 事件分发static void app_handle_event(bus_evt_t *evt){switch (evt-id) {case BUS_EVT_WIFI_UP:case BUS_EVT_WIFI_DOWN:case BUS_EVT_4G_UP:case BUS_EVT_4G_DOWN:case BUS_EVT_BLE_CONFIG_OK:net_policy_on_event(evt-id);break;case BUS_EVT_NET_SELECTED:speaker_ui_status(网络已连接);ai_session_start();break;case BUS_EVT_AI_CONNECTED:speaker_ui_status(AI 服务在线);ai_send_hello();break;case BUS_EVT_WAKEUP:audio_barge_in();audio_set_state(AUDIO_LISTENING);prompt_player_play(/spiffs/wakeup.mp3);speaker_ui_status(我在请说);break;case BUS_EVT_BARGE_IN:audio_barge_in();break;case BUS_EVT_CMD_CHAT:speaker_ui_status(正在思考...);ai_send_chat_text(用户发起语音对话);break;case BUS_EVT_CMD_STOP:audio_player_stop();audio_set_state(AUDIO_IDLE);speaker_ui_status(已停止);break;case BUS_EVT_CMD_VOL_UP:audio_volume_up();break;case BUS_EVT_CMD_VOL_DOWN:audio_volume_down();break;case BUS_EVT_CMD_BT_MODE:audio_route_set_bt_mode(true);break;case BUS_EVT_AI_JSON:ai_parse_json((char *)evt-payload);free(evt-payload);break;case BUS_EVT_OTA_NOTIFY:ota_start((char *)evt-payload);free(evt-payload);break;default:break;}}void app_dispatch_task(void *arg){QueueHandle_t q app_bus_queue();bus_evt_t evt;while (1) {if (xQueueReceive(q, evt, portMAX_DELAY) pdTRUE) {app_handle_event(evt);}}}15. app_main.cvoid app_main(void){nvs_flash_init();app_bus_init();board_init();speaker_ui_init();speaker_ui_status(四博 AI 智能音箱启动中...);audio_route_init();wifi_port_init();ble_provision_init();modem_4g_init();vb6824_port_init();ota_service_init();xTaskCreate(app_dispatch_task, app_dispatch, 8192, NULL, 8, NULL);xTaskCreate(vb6824_task, vb6824_task, 4096, NULL, 7, NULL);wifi_connect_saved_profile();ble_provision_start();modem_4g_probe_basic();speaker_ui_status(正在连接 Wi-Fi / 4G...);}16. sdkconfig.defaultsCONFIG_IDF_TARGETesp32s3CONFIG_ESPTOOLPY_FLASHSIZE_16MByCONFIG_SPIRAMyCONFIG_SPIRAM_USE_MALLOCyCONFIG_SPIRAM_SPEED_80MyCONFIG_FREERTOS_HZ1000CONFIG_ESP_MAIN_TASK_STACK_SIZE8192CONFIG_ESP_WIFI_STATIC_RX_BUFFER_NUM10CONFIG_ESP_WIFI_DYNAMIC_RX_BUFFER_NUM32CONFIG_ESP_WIFI_TX_BUFFER_TYPE_DYNAMICyCONFIG_LWIP_TCP_SND_BUF_DEFAULT8192CONFIG_LWIP_TCP_WND_DEFAULT8192CONFIG_LWIP_TCP_RECVMBOX_SIZE16CONFIG_MBEDTLS_SSL_IN_CONTENT_LEN16384CONFIG_MBEDTLS_SSL_OUT_CONTENT_LEN4096CONFIG_BT_ENABLEDyCONFIG_BT_NIMBLE_ENABLEDyCONFIG_LWIP_PPP_SUPPORTyCONFIG_PPP_SUPPORTy17. 总结四博 AI 智能音箱 4G S3 版本的关键不是“能播放声音”而是构建一套稳定的 AI 语音终端架构ESP32-S3系统主控、三模联网、AI 协议、OTAVB6824远场唤醒、AEC、离线命令、高噪声识别Wi-Fi家庭和固定场景主网络4G户外、门店、展厅兜底网络BLE小程序配网、绑定、控制WebSocketAI 长连接、TTS、工具调用外置蓝牙音频芯片扩展传统蓝牙音箱能力这套架构适合 AI 音箱、厨房语音助手、户外便携音箱、门店讲解终端、展厅接待设备和 B 端定制语音硬件。 四博 AI 智能音箱 4G S3 版本工程落地方案：三模联网、远场唤醒、打断播放与 AI 会话框架
四博 AI 智能音箱 4G S3 版本工程落地方案三模联网、远场唤醒、打断播放与 AI 会话框架1. 方案定位四博 AI 智能音箱 4G S3 版本是一套基于ESP32-S3 VB6824 Wi-Fi/BLE/4G的 AI 语音终端方案。它不是传统意义上的蓝牙音箱而是面向家庭、厨房、展厅、户外、门店和 B 端定制场景的联网 AI 音箱。四博模组选型资料中ESP32-S3 系列被定位在音视频 / AI 市场ESPS3-32、ESPS3-32E 系列兼容官方 ESP32-S3 模组封装适合 AI 音箱、AI 相机、多模态设备等产品开发。 四博 AI 方案资料中也明确给出 ESP32-C2/C3/S3 VB6824 语音方案VB6824 可完成音频编解码、AEC、语音唤醒和唤醒词修改让主控芯片专注通信及 UI。本方案采用“三层解耦”架构1. 网络平面Wi-Fi / BLE / 4G2. 语音平面VB6824 / 唤醒 / 打断 / 离线命令3. AI 平面WebSocket / 大模型 / TTS / OTA / 工具调用2. 硬件组合建议主控ESP32-S3R8 / ESPS3-32 N16R8语音VB6824联网Wi-Fi BLE 4G Cat.1音频MIC 功放 喇叭显示LED 灯效 / 小屏 / 点阵屏可选存储16MB Flash 8MB PSRAM电源Type-C / 锂电池 / DC 供电扩展外置经典蓝牙音频芯片 / TF Card / 按键需要特别说明ESP32-S3 原生支持 Wi-Fi BLEBLE 适合配网、绑定、小程序控制如果要实现真正的手机蓝牙音乐播放也就是 A2DP 经典蓝牙音频建议增加外置蓝牙音频芯片或采用 7014 类蓝牙音频方案。四博资料中也单独列出了 7014 蓝牙 PAN AI 手机伴侣方案和 AI 智能音响方案强调可做蓝牙音响、闹钟、声音克隆、声纹识别、APP、小程序和改唤醒词等功能。3. 总体软件框架这次不采用普通while(1)轮询写法而是采用Bus Manager Port Policy的工程结构。sibo_ai_speaker_4g_s3/├── app/│ ├── app_main.c│ ├── app_bus.c│ ├── app_bus.h│ ├── app_fsm.c│ └── app_fsm.h├── board/│ ├── board_config.h│ └── board_init.c├── network/│ ├── net_policy.c│ ├── wifi_port.c│ ├── ble_provision.c│ └── modem_4g_port.c├── voice/│ ├── vb6824_port.c│ ├── voice_cmd_map.c│ └── wakeup_controller.c├── audio/│ ├── audio_route.c│ ├── tts_player.c│ └── prompt_player.c├── ai/│ ├── ai_session.c│ ├── ai_protocol.c│ └── ai_action.c├── ota/│ └── ota_service.c└── ui/├── speaker_ui.c└── led_effect.c核心思想驱动层只负责收发数据Manager 层只负责状态管理Policy 层只负责选择策略App 层只处理业务事件AI 层只处理协议与云端交互。4. board_config.h#pragma once#include driver/gpio.h#include driver/uart.h#define PRODUCT_NAME SIBO_AI_SPEAKER_4G_S3#define DEVICE_ID SIBO_S3_4G_001122334455/* AI Server */#define AI_WS_URI wss://ai.example.com/sibo/speaker/ws/* VB6824 UART */#define VB6824_UART UART_NUM_1#define VB6824_TXD GPIO_NUM_17#define VB6824_RXD GPIO_NUM_18#define VB6824_BAUD 115200/* 4G UART */#define MODEM_UART UART_NUM_2#define MODEM_TXD GPIO_NUM_40#define MODEM_RXD GPIO_NUM_41#define MODEM_PWR GPIO_NUM_42#define MODEM_BAUD 115200/* Audio */#define I2S_BCLK GPIO_NUM_5#define I2S_WS GPIO_NUM_6#define I2S_DOUT GPIO_NUM_7#define I2S_DIN GPIO_NUM_8#define AMP_EN GPIO_NUM_9/* Keys */#define KEY_WAKEUP GPIO_NUM_0#define KEY_VOL_UP GPIO_NUM_10#define KEY_VOL_DOWN GPIO_NUM_11/* Network Policy */#define WIFI_SCORE 100#define MODEM_4G_SCORE 70#define NET_RETRY_INTERVAL_MS 30005. 应用事件总线AI 音箱有大量异步事件网络上线、4G 断线、语音唤醒、播放中打断、AI 返回、TTS 播放完成、OTA 通知。建议统一走事件总线。#pragma once#include stdint.h#include stddef.htypedef enum {BUS_EVT_NONE 0,BUS_EVT_WIFI_UP,BUS_EVT_WIFI_DOWN,BUS_EVT_4G_UP,BUS_EVT_4G_DOWN,BUS_EVT_BLE_CONFIG_OK,BUS_EVT_NET_SELECTED,BUS_EVT_NET_LOST,BUS_EVT_WAKEUP,BUS_EVT_BARGE_IN,BUS_EVT_CMD_CHAT,BUS_EVT_CMD_STOP,BUS_EVT_CMD_VOL_UP,BUS_EVT_CMD_VOL_DOWN,BUS_EVT_CMD_BT_MODE,BUS_EVT_CMD_MUSIC,BUS_EVT_CMD_ALARM,BUS_EVT_AI_CONNECTED,BUS_EVT_AI_DISCONNECTED,BUS_EVT_AI_JSON,BUS_EVT_TTS_START,BUS_EVT_TTS_DONE,BUS_EVT_OTA_NOTIFY,BUS_EVT_OTA_START,BUS_EVT_OTA_DONE,BUS_EVT_OTA_FAIL,} bus_evt_id_t;typedef struct {bus_evt_id_t id;void *payload;size_t length;} bus_evt_t;#include freertos/FreeRTOS.h#include freertos/queue.h#include app_bus.hstatic QueueHandle_t s_bus_queue NULL;void app_bus_init(void){s_bus_queue xQueueCreate(32, sizeof(bus_evt_t));}bool app_bus_post(bus_evt_id_t id, void *payload, size_t length){if (!s_bus_queue) {return false;}bus_evt_t evt {.id id,.payload payload,.length length,};return xQueueSend(s_bus_queue, evt, pdMS_TO_TICKS(20)) pdTRUE;}QueueHandle_t app_bus_queue(void){return s_bus_queue;}6. 三模联网策略Wi-Fi 优先4G 兜底BLE 配网这版代码用“评分制”来选择网络比简单 if/else 更适合后续扩展。typedef enum {NET_IF_NONE 0,NET_IF_WIFI,NET_IF_4G,} net_if_t;typedef struct {bool wifi_ready;bool g4_ready;int wifi_rssi;int g4_csq;net_if_t active;} net_policy_ctx_t;static net_policy_ctx_t s_net;static int net_score_wifi(void){if (!s_net.wifi_ready) {return 0;}if (s_net.wifi_rssi -60) {return 100;} else if (s_net.wifi_rssi -75) {return 85;}return 60;}static int net_score_4g(void){if (!s_net.g4_ready) {return 0;}if (s_net.g4_csq 20) {return 80;} else if (s_net.g4_csq 12) {return 70;}return 50;}static void net_policy_select(void){int wifi_score net_score_wifi();int g4_score net_score_4g();net_if_t next NET_IF_NONE;if (wifi_score g4_score wifi_score 0) {next NET_IF_WIFI;} else if (g4_score 0) {next NET_IF_4G;}if (next ! s_net.active) {s_net.active next;if (next NET_IF_NONE) {app_bus_post(BUS_EVT_NET_LOST, NULL, 0);} else {app_bus_post(BUS_EVT_NET_SELECTED, NULL, 0);}}}void net_policy_on_event(bus_evt_id_t evt){switch (evt) {case BUS_EVT_WIFI_UP:s_net.wifi_ready true;break;case BUS_EVT_WIFI_DOWN:s_net.wifi_ready false;modem_4g_connect_async();break;case BUS_EVT_4G_UP:s_net.g4_ready true;break;case BUS_EVT_4G_DOWN:s_net.g4_ready false;break;case BUS_EVT_BLE_CONFIG_OK:wifi_connect_saved_profile();break;default:break;}net_policy_select();}const char *net_policy_active_name(void){switch (s_net.active) {case NET_IF_WIFI:return wifi;case NET_IF_4G:return 4g;default:return none;}}7. 4G 模块 AT 命令封装#include driver/uart.h#include esp_log.h#include board_config.hstatic const char *TAG MODEM4G;void modem_4g_init(void){uart_config_t cfg {.baud_rate MODEM_BAUD,.data_bits UART_DATA_8_BITS,.parity UART_PARITY_DISABLE,.stop_bits UART_STOP_BITS_1,.flow_ctrl UART_HW_FLOWCTRL_DISABLE,.source_clk UART_SCLK_DEFAULT,};uart_driver_install(MODEM_UART, 4096, 4096, 0, NULL, 0);uart_param_config(MODEM_UART, cfg);uart_set_pin(MODEM_UART, MODEM_TXD, MODEM_RXD,UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);ESP_LOGI(TAG, 4G modem uart initialized);}static void modem_send_line(const char *cmd){uart_write_bytes(MODEM_UART, cmd, strlen(cmd));uart_write_bytes(MODEM_UART, \r\n, 2);}void modem_4g_probe_basic(void){modem_send_line(AT);vTaskDelay(pdMS_TO_TICKS(300));modem_send_line(ATE0);vTaskDelay(pdMS_TO_TICKS(300));modem_send_line(ATCPIN?);vTaskDelay(pdMS_TO_TICKS(300));modem_send_line(ATCSQ);vTaskDelay(pdMS_TO_TICKS(300));modem_send_line(ATCREG?);vTaskDelay(pdMS_TO_TICKS(300));modem_send_line(ATCGATT?);vTaskDelay(pdMS_TO_TICKS(300));}void modem_4g_start_data_call(void){modem_send_line(ATCGDCONT1,\IP\,\cmnet\);vTaskDelay(pdMS_TO_TICKS(500));modem_send_line(ATD*99#);/** 后续进入 PPP* 1. esp_modem 建立 DTE/DCE* 2. esp_netif_attach PPP* 3. 等待 IP_EVENT_PPP_GOT_IP* 4. 成功后 app_bus_post(BUS_EVT_4G_UP)*/}8. VB6824 串口流式解析器上一版是简单判断buf[0] 0xAA真实产品建议写成流式解析器避免串口分包、粘包导致解析失败。协议示例AA 55 LEN CMD PAYLOAD... CHECKSUMtypedef enum {PARSE_WAIT_AA 0,PARSE_WAIT_55,PARSE_WAIT_LEN,PARSE_WAIT_BODY,PARSE_WAIT_SUM,} vb_parse_state_t;typedef struct {vb_parse_state_t state;uint8_t len;uint8_t index;uint8_t cmd;uint8_t body[32];uint8_t sum;} vb_parser_t;static vb_parser_t s_vb_parser;static uint8_t vb_sum_calc(uint8_t len, uint8_t cmd, uint8_t *body){uint8_t sum 0xAA 0x55 len cmd;for (int i 0; i len - 1; i) {sum body[i];}return sum;}static void vb_dispatch_cmd(uint8_t cmd){switch (cmd) {case 0x01:app_bus_post(BUS_EVT_WAKEUP, NULL, 0);break;case 0x02:app_bus_post(BUS_EVT_BARGE_IN, NULL, 0);break;case 0x03:app_bus_post(BUS_EVT_CMD_CHAT, NULL, 0);break;case 0x04:app_bus_post(BUS_EVT_CMD_STOP, NULL, 0);break;case 0x05:app_bus_post(BUS_EVT_CMD_VOL_UP, NULL, 0);break;case 0x06:app_bus_post(BUS_EVT_CMD_VOL_DOWN, NULL, 0);break;case 0x07:app_bus_post(BUS_EVT_CMD_BT_MODE, NULL, 0);break;default:break;}}static void vb_parser_input(uint8_t byte){switch (s_vb_parser.state) {case PARSE_WAIT_AA:if (byte 0xAA) {s_vb_parser.state PARSE_WAIT_55;}break;case PARSE_WAIT_55:if (byte 0x55) {s_vb_parser.state PARSE_WAIT_LEN;} else {s_vb_parser.state PARSE_WAIT_AA;}break;case PARSE_WAIT_LEN:s_vb_parser.len byte;s_vb_parser.index 0;if (s_vb_parser.len 1) {s_vb_parser.state PARSE_WAIT_SUM;} else {s_vb_parser.state PARSE_WAIT_BODY;}break;case PARSE_WAIT_BODY:if (s_vb_parser.index 0) {s_vb_parser.cmd byte;} else {s_vb_parser.body[s_vb_parser.index - 1] byte;}s_vb_parser.index;if (s_vb_parser.index s_vb_parser.len) {s_vb_parser.state PARSE_WAIT_SUM;}break;case PARSE_WAIT_SUM: {uint8_t calc vb_sum_calc(s_vb_parser.len,s_vb_parser.cmd,s_vb_parser.body);if (calc byte) {vb_dispatch_cmd(s_vb_parser.cmd);}memset(s_vb_parser, 0, sizeof(s_vb_parser));s_vb_parser.state PARSE_WAIT_AA;break;}default:s_vb_parser.state PARSE_WAIT_AA;break;}}串口任务void vb6824_task(void *arg){uint8_t buf[64];while (1) {int len uart_read_bytes(VB6824_UART, buf, sizeof(buf), pdMS_TO_TICKS(100));for (int i 0; i len; i) {vb_parser_input(buf[i]);}}}9. 音频状态机远场唤醒 播放中打断typedef enum {AUDIO_IDLE 0,AUDIO_LISTENING,AUDIO_UPLOADING,AUDIO_PLAYING_TTS,AUDIO_BT_MUSIC,AUDIO_INTERRUPTED,} audio_state_t;static audio_state_t s_audio_state AUDIO_IDLE;static int s_volume 70;void audio_set_state(audio_state_t state){s_audio_state state;}void audio_barge_in(void){if (s_audio_state AUDIO_PLAYING_TTS ||s_audio_state AUDIO_BT_MUSIC) {audio_player_stop();s_audio_state AUDIO_INTERRUPTED;speaker_ui_status(已打断请继续说);}}void audio_volume_up(void){if (s_volume 100) {s_volume 5;}audio_player_set_volume(s_volume);}void audio_volume_down(void){if (s_volume 0) {s_volume - 5;}audio_player_set_volume(s_volume);}VB6824 的价值就在这里它把唤醒、AEC、离线命令和抗噪能力前置到语音芯片让 ESP32-S3 主要负责通信、状态机和 AI 协议。四博 AI 开发宝典中提到VB6824 具备更远距离唤醒、更低误唤醒率、更强抗噪能力和更快响应识别时间。10. AI 会话协议设备上线{type: hello,device_id: SIBO_S3_4G_001122334455,product: SIBO_AI_SPEAKER_4G_S3,net: wifi,capability: {wifi: true,ble: true,g4: true,far_field: true,barge_in: true,wake_word: 小博小博}}用户语音请求{type: chat,session_id: session_0001,text: 帮我设置一个晚上八点的提醒,scene: ai_speaker,tts: true}AI 返回{type: ai_result,text: 好的已为你设置晚上八点的提醒。,tts_url: https://cdn.example.com/tts/001.mp3,action: {name: set_alarm,params: {time: 20:00}}}WebSocket 客户端static esp_websocket_client_handle_t s_ws;static void ai_ws_event_handler(void *arg,esp_event_base_t base,int32_t event_id,void *event_data){esp_websocket_event_data_t *data event_data;switch (event_id) {case WEBSOCKET_EVENT_CONNECTED:app_bus_post(BUS_EVT_AI_CONNECTED, NULL, 0);break;case WEBSOCKET_EVENT_DISCONNECTED:app_bus_post(BUS_EVT_AI_DISCONNECTED, NULL, 0);break;case WEBSOCKET_EVENT_DATA:if (data-op_code 0x1) {char *json calloc(1, data-data_len 1);if (json) {memcpy(json, data-data_ptr, data-data_len);app_bus_post(BUS_EVT_AI_JSON, json, data-data_len);}}break;default:break;}}void ai_session_start(void){esp_websocket_client_config_t cfg {.uri AI_WS_URI,.reconnect_timeout_ms 3000,.network_timeout_ms 10000,};s_ws esp_websocket_client_init(cfg);esp_websocket_register_events(s_ws, WEBSOCKET_EVENT_ANY, ai_ws_event_handler, NULL);esp_websocket_client_start(s_ws);}static void ai_send_json(cJSON *root){if (!s_ws || !esp_websocket_client_is_connected(s_ws)) {return;}char *text cJSON_PrintUnformatted(root);if (!text) {return;}esp_websocket_client_send_text(s_ws, text, strlen(text), portMAX_DELAY);cJSON_free(text);}11. 设备 Hello 上报void ai_send_hello(void){cJSON *root cJSON_CreateObject();cJSON_AddStringToObject(root, type, hello);cJSON_AddStringToObject(root, device_id, DEVICE_ID);cJSON_AddStringToObject(root, product, PRODUCT_NAME);cJSON_AddStringToObject(root, net, net_policy_active_name());cJSON *cap cJSON_CreateObject();cJSON_AddBoolToObject(cap, wifi, true);cJSON_AddBoolToObject(cap, ble, true);cJSON_AddBoolToObject(cap, g4, true);cJSON_AddBoolToObject(cap, far_field, true);cJSON_AddBoolToObject(cap, barge_in, true);cJSON_AddStringToObject(cap, wake_word, 小博小博);cJSON_AddItemToObject(root, capability, cap);ai_send_json(root);cJSON_Delete(root);}12. AI 返回解析与 Action 分发static void ai_handle_action(cJSON *action){cJSON *name cJSON_GetObjectItem(action, name);cJSON *params cJSON_GetObjectItem(action, params);if (!cJSON_IsString(name)) {return;}if (strcmp(name-valuestring, set_alarm) 0) {cJSON *time cJSON_GetObjectItem(params, time);if (cJSON_IsString(time)) {alarm_set(time-valuestring);}} else if (strcmp(name-valuestring, play_music) 0) {cJSON *keyword cJSON_GetObjectItem(params, keyword);if (cJSON_IsString(keyword)) {music_search_and_play(keyword-valuestring);}} else if (strcmp(name-valuestring, switch_bt) 0) {audio_route_set_bt_mode(true);}}void ai_parse_json(const char *json){cJSON *root cJSON_Parse(json);if (!root) {return;}cJSON *type cJSON_GetObjectItem(root, type);if (cJSON_IsString(type) strcmp(type-valuestring, ai_result) 0) {cJSON *text cJSON_GetObjectItem(root, text);cJSON *tts cJSON_GetObjectItem(root, tts_url);cJSON *action cJSON_GetObjectItem(root, action);if (cJSON_IsString(text)) {speaker_ui_text(text-valuestring);}if (cJSON_IsString(tts)) {audio_set_state(AUDIO_PLAYING_TTS);tts_player_play_url(tts-valuestring);}if (cJSON_IsObject(action)) {ai_handle_action(action);}}if (cJSON_IsString(type) strcmp(type-valuestring, ota_notify) 0) {cJSON *url cJSON_GetObjectItem(root, firmware_url);if (cJSON_IsString(url)) {char *copy strdup(url-valuestring);app_bus_post(BUS_EVT_OTA_NOTIFY, copy, strlen(copy));}}cJSON_Delete(root);}13. 音频路由AI TTS / 本地提示音 / 蓝牙音频typedef enum {AUDIO_ROUTE_PROMPT 0,AUDIO_ROUTE_AI_TTS,AUDIO_ROUTE_BT_AUDIO,} audio_route_t;static audio_route_t s_route AUDIO_ROUTE_PROMPT;void audio_route_set(audio_route_t route){s_route route;switch (route) {case AUDIO_ROUTE_PROMPT:external_bt_audio_enable(false);amp_enable(true);break;case AUDIO_ROUTE_AI_TTS:external_bt_audio_enable(false);amp_enable(true);break;case AUDIO_ROUTE_BT_AUDIO:external_bt_audio_enable(true);amp_enable(true);audio_set_state(AUDIO_BT_MUSIC);break;}}void audio_route_set_bt_mode(bool enable){if (enable) {audio_route_set(AUDIO_ROUTE_BT_AUDIO);speaker_ui_status(蓝牙音箱模式);} else {audio_route_set(AUDIO_ROUTE_PROMPT);speaker_ui_status(AI 音箱模式);}}14. App 事件分发static void app_handle_event(bus_evt_t *evt){switch (evt-id) {case BUS_EVT_WIFI_UP:case BUS_EVT_WIFI_DOWN:case BUS_EVT_4G_UP:case BUS_EVT_4G_DOWN:case BUS_EVT_BLE_CONFIG_OK:net_policy_on_event(evt-id);break;case BUS_EVT_NET_SELECTED:speaker_ui_status(网络已连接);ai_session_start();break;case BUS_EVT_AI_CONNECTED:speaker_ui_status(AI 服务在线);ai_send_hello();break;case BUS_EVT_WAKEUP:audio_barge_in();audio_set_state(AUDIO_LISTENING);prompt_player_play(/spiffs/wakeup.mp3);speaker_ui_status(我在请说);break;case BUS_EVT_BARGE_IN:audio_barge_in();break;case BUS_EVT_CMD_CHAT:speaker_ui_status(正在思考...);ai_send_chat_text(用户发起语音对话);break;case BUS_EVT_CMD_STOP:audio_player_stop();audio_set_state(AUDIO_IDLE);speaker_ui_status(已停止);break;case BUS_EVT_CMD_VOL_UP:audio_volume_up();break;case BUS_EVT_CMD_VOL_DOWN:audio_volume_down();break;case BUS_EVT_CMD_BT_MODE:audio_route_set_bt_mode(true);break;case BUS_EVT_AI_JSON:ai_parse_json((char *)evt-payload);free(evt-payload);break;case BUS_EVT_OTA_NOTIFY:ota_start((char *)evt-payload);free(evt-payload);break;default:break;}}void app_dispatch_task(void *arg){QueueHandle_t q app_bus_queue();bus_evt_t evt;while (1) {if (xQueueReceive(q, evt, portMAX_DELAY) pdTRUE) {app_handle_event(evt);}}}15. app_main.cvoid app_main(void){nvs_flash_init();app_bus_init();board_init();speaker_ui_init();speaker_ui_status(四博 AI 智能音箱启动中...);audio_route_init();wifi_port_init();ble_provision_init();modem_4g_init();vb6824_port_init();ota_service_init();xTaskCreate(app_dispatch_task, app_dispatch, 8192, NULL, 8, NULL);xTaskCreate(vb6824_task, vb6824_task, 4096, NULL, 7, NULL);wifi_connect_saved_profile();ble_provision_start();modem_4g_probe_basic();speaker_ui_status(正在连接 Wi-Fi / 4G...);}16. sdkconfig.defaultsCONFIG_IDF_TARGETesp32s3CONFIG_ESPTOOLPY_FLASHSIZE_16MByCONFIG_SPIRAMyCONFIG_SPIRAM_USE_MALLOCyCONFIG_SPIRAM_SPEED_80MyCONFIG_FREERTOS_HZ1000CONFIG_ESP_MAIN_TASK_STACK_SIZE8192CONFIG_ESP_WIFI_STATIC_RX_BUFFER_NUM10CONFIG_ESP_WIFI_DYNAMIC_RX_BUFFER_NUM32CONFIG_ESP_WIFI_TX_BUFFER_TYPE_DYNAMICyCONFIG_LWIP_TCP_SND_BUF_DEFAULT8192CONFIG_LWIP_TCP_WND_DEFAULT8192CONFIG_LWIP_TCP_RECVMBOX_SIZE16CONFIG_MBEDTLS_SSL_IN_CONTENT_LEN16384CONFIG_MBEDTLS_SSL_OUT_CONTENT_LEN4096CONFIG_BT_ENABLEDyCONFIG_BT_NIMBLE_ENABLEDyCONFIG_LWIP_PPP_SUPPORTyCONFIG_PPP_SUPPORTy17. 总结四博 AI 智能音箱 4G S3 版本的关键不是“能播放声音”而是构建一套稳定的 AI 语音终端架构ESP32-S3系统主控、三模联网、AI 协议、OTAVB6824远场唤醒、AEC、离线命令、高噪声识别Wi-Fi家庭和固定场景主网络4G户外、门店、展厅兜底网络BLE小程序配网、绑定、控制WebSocketAI 长连接、TTS、工具调用外置蓝牙音频芯片扩展传统蓝牙音箱能力这套架构适合 AI 音箱、厨房语音助手、户外便携音箱、门店讲解终端、展厅接待设备和 B 端定制语音硬件。