diff --git a/main/application.cc b/main/application.cc
index 9980c43..017dd53 100644
--- a/main/application.cc
+++ b/main/application.cc
@@ -520,10 +520,22 @@ void Application::ToggleChatState() {
             Board::GetInstance().SetPowerSaveMode(false);// 关闭低功耗模式
             if (!protocol_->OpenAudioChannel()) {
                 auto ac = Board::GetInstance().GetAudioCodec();
-                ESP_LOGW(TAG, "打开音频通道失败，将在2秒后重试");
+                audio_channel_retry_count_++;
+                ESP_LOGW(TAG, "打开音频通道失败 (第 %d 次), 将在2秒后重试", audio_channel_retry_count_);
                 if (ac) {
                     ESP_LOGW(TAG, "Diag: codec out_channels=%d in_channels=%d out_sr=%d in_sr=%d", ac->output_channels(), ac->input_channels(), ac->output_sample_rate(), ac->input_sample_rate());
                 }
+                // 方案 B (移植自 Baji commit 70f0cdd): 连续失败 3 次后销毁 + 重建 RTC engine
+                //   清理 SDK 内部状态污染 (lwIP socket fd 残留 / 内部缓存错乱),
+                //   触发 Phase 6 的 rtc_handle_=nullptr → Start() 重建路径
+                if (audio_channel_retry_count_ >= 3) {
+                    ESP_LOGW(TAG, "🔄 连续失败 3 次, 触发 RTC engine 重建 (清理 SDK 状态)");
+                    auto* volc_rtc = static_cast<VolcRtcProtocol*>(protocol_.get());
+                    if (volc_rtc) {
+                        volc_rtc->ForceRebuildEngine();
+                    }
+                    audio_channel_retry_count_ = 0;
+                }
                 SetDeviceState(kDeviceStateIdle);
                 Schedule([this]() {
                     vTaskDelay(pdMS_TO_TICKS(2000));
@@ -532,6 +544,8 @@ void Application::ToggleChatState() {
                 });
                 return;
             }
+            // 连接成功重置重试计数
+            audio_channel_retry_count_ = 0;
 
             listening_mode_ = kListeningModeRealtime;// 设置监听模式为实时监听
             SetDeviceState(kDeviceStateDialog);// 设置设备状态为对话模式
diff --git a/main/application.h b/main/application.h
index ed7bfac..5c0d9dc 100644
--- a/main/application.h
+++ b/main/application.h
@@ -167,6 +167,7 @@ private:
     std::atomic<bool> https_playback_active_{false};// 🌐 HTTPS音频播放进行中标志
     std::atomic<bool> https_playback_abort_{false};// 🌐 HTTPS音频播放中止标志
     bool aborted_ = false;
+    int audio_channel_retry_count_ = 0;// RTC 偶发连接失败重试计数 (方案 B: 失败 3 次后销毁 + 重建 engine, 移植自 Baji commit 70f0cdd)
     bool voice_detected_ = false;
     bool audio_paused_ = false; // 音频暂停状态标志
     float current_speaker_volume_ = 0.0f;  // 当前扬声器音量，用于语音打断判断
diff --git a/main/protocols/volc_rtc_protocol.cc b/main/protocols/volc_rtc_protocol.cc
index a2cb3dc..ee9fd31 100644
--- a/main/protocols/volc_rtc_protocol.cc
+++ b/main/protocols/volc_rtc_protocol.cc
@@ -21,6 +21,27 @@
 
 static const char* TAG = "VolcRtcProtocol";
 
+// ============================================================
+// 方案 C (移植自 Baji commit 70f0cdd): RTC bind 失败诊断埋点
+// 验证完成后改 0 关闭, 编译器消除 #if 块, 不占 Flash/CPU
+// ============================================================
+#ifndef DIAG_RTC_BIND_ENABLE
+#define DIAG_RTC_BIND_ENABLE 1
+#endif
+
+#if DIAG_RTC_BIND_ENABLE
+#include "esp_wifi.h"
+#include "lwip/sockets.h"  // LWIP_SOCKET_OFFSET
+static int diag_count_used_sockets(void) {
+    int used = 0;
+    for (int fd = LWIP_SOCKET_OFFSET; fd < LWIP_SOCKET_OFFSET + CONFIG_LWIP_MAX_SOCKETS; fd++) {
+        struct stat st;
+        if (fstat(fd, &st) == 0) used++;
+    }
+    return used;
+}
+#endif
+
 VolcRtcProtocol::VolcRtcProtocol() {
     event_group_handle_ = xEventGroupCreate();
 }
@@ -347,6 +368,18 @@ bool VolcRtcProtocol::OpenAudioChannel() {
         xEventGroupClearBits(event_group_handle_, 0x1 | 0x2);
         // 新增：extra_params 用于传递额外的AgentConfig配置参数
         ESP_LOGI(TAG, "Join RTC: handle=%p bot=%s iot_ready=%d free_heap=%u", rtc_handle_, CONFIG_VOLC_BOT_ID, (int)iot_ready_, (unsigned)heap_caps_get_free_size(MALLOC_CAP_DEFAULT));
+#if DIAG_RTC_BIND_ENABLE
+        {
+            int sockets_used = diag_count_used_sockets();
+            wifi_ap_record_t ap_info = {};
+            int rssi = (esp_wifi_sta_get_ap_info(&ap_info) == ESP_OK) ? ap_info.rssi : -127;
+            ESP_LOGW("DIAG-RTC", "Pre-Join: sockets=%d/%d heap=%u psram=%u rssi=%d",
+                     sockets_used, CONFIG_LWIP_MAX_SOCKETS,
+                     (unsigned)heap_caps_get_free_size(MALLOC_CAP_DEFAULT),
+                     (unsigned)heap_caps_get_free_size(MALLOC_CAP_SPIRAM),
+                     rssi);
+        }
+#endif
         int ret = volc_rtc_start(rtc_handle_, CONFIG_VOLC_BOT_ID, &iot_info_, extra_params_.empty() ? NULL : extra_params_.c_str());
         if (ret != 0) {
             ESP_LOGE(TAG, "RTC启动失败：%d", ret);// RTC启动失败：%d
@@ -358,6 +391,16 @@ bool VolcRtcProtocol::OpenAudioChannel() {
         if ((bits & 0x1) == 0) {
             ESP_LOGE(TAG, "RTC连接超时");// RTC连接超时
             ESP_LOGW(TAG, "Diag: check Wi-Fi, SNTP time sync, IoT creds, RTC server availability");// 诊断：检查Wi-Fi、SNTP时间同步、IoT凭证、RTC服务器可用性
+#if DIAG_RTC_BIND_ENABLE
+            {
+                int sockets_used = diag_count_used_sockets();
+                ESP_LOGW("DIAG-RTC", "Post-Fail: sockets=%d/%d heap=%u psram=%u errno=%d(%s)",
+                         sockets_used, CONFIG_LWIP_MAX_SOCKETS,
+                         (unsigned)heap_caps_get_free_size(MALLOC_CAP_DEFAULT),
+                         (unsigned)heap_caps_get_free_size(MALLOC_CAP_SPIRAM),
+                         errno, strerror(errno));
+            }
+#endif
             return false;
         }
         // Do not block audio readiness on remote user join; enable subscribe immediately
@@ -435,6 +478,38 @@ void VolcRtcProtocol::LeaveRoom(bool notify_closed) {
     }
 }
 
+// 方案 B (移植自 Baji commit 70f0cdd): 强制销毁并重建 RTC engine
+// 用途: OpenAudioChannel 连续失败 N 次后调用, 清理 SDK 内部错乱状态
+// 实现: 销毁 rtc_handle_ + 触发 Phase 6 重建路径
+//   下次 OpenAudioChannel 看到 rtc_handle_=nullptr → Start() 异步重建
+void VolcRtcProtocol::ForceRebuildEngine() {
+    ESP_LOGW(TAG, "🔄 ForceRebuildEngine: 销毁 RTC engine 以清理 SDK 状态");
+#if DIAG_RTC_BIND_ENABLE
+    ESP_LOGW("DIAG-RTC", "Pre-Rebuild: sockets=%d/%d heap=%u",
+             diag_count_used_sockets(), CONFIG_LWIP_MAX_SOCKETS,
+             (unsigned)heap_caps_get_free_size(MALLOC_CAP_DEFAULT));
+#endif
+    if (rtc_handle_) {
+        if (is_connected_) {
+            volc_rtc_stop(rtc_handle_);
+            is_connected_ = false;
+        }
+        volc_rtc_destroy(rtc_handle_);
+        rtc_handle_ = nullptr;
+    }
+    is_audio_channel_opened_ = false;
+    downlink_is_pcm_ = false;
+    first_downlink_logged_ = false;
+    // 等 2 秒让 lwIP 释放残留 socket fd (TIME_WAIT 状态)
+    vTaskDelay(pdMS_TO_TICKS(2000));
+#if DIAG_RTC_BIND_ENABLE
+    ESP_LOGW("DIAG-RTC", "Post-Rebuild-Wait: sockets=%d/%d heap=%u",
+             diag_count_used_sockets(), CONFIG_LWIP_MAX_SOCKETS,
+             (unsigned)heap_caps_get_free_size(MALLOC_CAP_DEFAULT));
+#endif
+    ESP_LOGI(TAG, "🔄 engine 已销毁, 下次 OpenAudioChannel 触发 Phase 6 重建");
+}
+
 // 🔊 检查音频通道是否已打开
 bool VolcRtcProtocol::IsAudioChannelOpened() const {
     return is_audio_channel_opened_;
diff --git a/main/protocols/volc_rtc_protocol.h b/main/protocols/volc_rtc_protocol.h
index 0e49ace..e824ccd 100644
--- a/main/protocols/volc_rtc_protocol.h
+++ b/main/protocols/volc_rtc_protocol.h
@@ -21,6 +21,12 @@ public:
     bool OpenAudioChannel() override;// 🔊 打开音频通道
     void CloseAudioChannel() override;// 🔊 关闭音频通道
     void LeaveRoom(bool notify_closed = true) override;// Phase 6: 退出 RTC 房间（stop，保留 handle 供唤醒复用）
+
+    // 方案 B (移植自 Baji commit 70f0cdd): 强制销毁并重建 RTC engine.
+    // 当 OpenAudioChannel 连续失败 N 次时调用, 清理 SDK 内部错乱状态
+    // (lwIP socket fd 残留 / 内部缓存污染), 触发 Phase 6 的 rtc_handle_=nullptr → Start() 重建路径
+    void ForceRebuildEngine();
+
     bool IsAudioChannelOpened() const override;// 🔊 检查音频通道是否已打开
     void SendAbortSpeaking(AbortReason reason) override;// 🔊 发送中止通话请求
     void SendStartListening(ListeningMode mode) override;// 🔊 发送开始监听请求
diff --git a/sdkconfig b/sdkconfig
index 7db0b92..f695839 100644
--- a/sdkconfig
+++ b/sdkconfig
@@ -14,6 +14,7 @@ CONFIG_SOC_GDMA_SUPPORTED=y
 CONFIG_SOC_AHB_GDMA_SUPPORTED=y
 CONFIG_SOC_GPTIMER_SUPPORTED=y
 CONFIG_SOC_LCDCAM_SUPPORTED=y
+CONFIG_SOC_LCDCAM_CAM_SUPPORTED=y
 CONFIG_SOC_LCDCAM_I80_LCD_SUPPORTED=y
 CONFIG_SOC_LCDCAM_RGB_LCD_SUPPORTED=y
 CONFIG_SOC_MCPWM_SUPPORTED=y
@@ -101,7 +102,7 @@ CONFIG_SOC_CPU_HAS_FPU=y
 CONFIG_SOC_HP_CPU_HAS_MULTIPLE_CORES=y
 CONFIG_SOC_CPU_BREAKPOINTS_NUM=2
 CONFIG_SOC_CPU_WATCHPOINTS_NUM=2
-CONFIG_SOC_CPU_WATCHPOINT_MAX_REGION_SIZE=64
+CONFIG_SOC_CPU_WATCHPOINT_MAX_REGION_SIZE=0x40
 CONFIG_SOC_SIMD_PREFERRED_DATA_ALIGNMENT=16
 CONFIG_SOC_DS_SIGNATURE_MAX_BIT_LEN=4096
 CONFIG_SOC_DS_KEY_PARAM_MD_IV_LENGTH=16
@@ -208,7 +209,7 @@ CONFIG_SOC_RTCIO_INPUT_OUTPUT_SUPPORTED=y
 CONFIG_SOC_RTCIO_HOLD_SUPPORTED=y
 CONFIG_SOC_RTCIO_WAKE_SUPPORTED=y
 CONFIG_SOC_LP_IO_CLOCK_IS_INDEPENDENT=y
-CONFIG_SOC_SDM_GROUPS=y
+CONFIG_SOC_SDM_GROUPS=1
 CONFIG_SOC_SDM_CHANNELS_PER_GROUP=8
 CONFIG_SOC_SDM_CLK_SUPPORT_APB=y
 CONFIG_SOC_SPI_PERIPH_NUM=3
@@ -369,6 +370,9 @@ CONFIG_SOC_BLE_DEVICE_PRIVACY_SUPPORTED=y
 CONFIG_SOC_BLUFI_SUPPORTED=y
 CONFIG_SOC_ULP_HAS_ADC=y
 CONFIG_SOC_PHY_COMBO_MODULE=y
+CONFIG_SOC_LCDCAM_CAM_SUPPORT_RGB_YUV_CONV=y
+CONFIG_SOC_LCDCAM_CAM_PERIPH_NUM=1
+CONFIG_SOC_LCDCAM_CAM_DATA_WIDTH_MAX=16
 CONFIG_IDF_CMAKE=y
 CONFIG_IDF_TOOLCHAIN="gcc"
 CONFIG_IDF_TOOLCHAIN_GCC=y
@@ -1021,7 +1025,7 @@ CONFIG_BT_LOG_BLUFI_TRACE_LEVEL=2
 
 CONFIG_BT_ACL_CONNECTIONS=4
 CONFIG_BT_MULTI_CONNECTION_ENBALE=y
-# CONFIG_BT_ALLOCATION_FROM_SPIRAM_FIRST is not set
+CONFIG_BT_ALLOCATION_FROM_SPIRAM_FIRST=y
 # CONFIG_BT_BLE_DYNAMIC_ENV_MEMORY is not set
 CONFIG_BT_SMP_ENABLE=y
 CONFIG_BT_SMP_MAX_BONDS=15
@@ -1033,6 +1037,7 @@ CONFIG_BT_BLE_42_FEATURES_SUPPORTED=y
 CONFIG_BT_BLE_42_DTM_TEST_EN=y
 CONFIG_BT_BLE_42_ADV_EN=y
 CONFIG_BT_BLE_42_SCAN_EN=y
+CONFIG_BT_BLE_VENDOR_HCI_EN=y
 # CONFIG_BT_BLE_HIGH_DUTY_ADV_INTERVAL is not set
 # CONFIG_BT_ABORT_WHEN_ALLOCATION_FAILS is not set
 # end of Bluedroid Options
@@ -1254,6 +1259,7 @@ CONFIG_ESP_TLS_USE_DS_PERIPHERAL=y
 # CONFIG_ESP_TLS_SERVER_MIN_AUTH_MODE_OPTIONAL is not set
 # CONFIG_ESP_TLS_PSK_VERIFICATION is not set
 # CONFIG_ESP_TLS_INSECURE is not set
+CONFIG_ESP_TLS_DYN_BUF_STRATEGY_SUPPORTED=y
 # end of ESP-TLS
 
 #
@@ -1280,6 +1286,12 @@ CONFIG_ESP_COEX_SW_COEXIST_ENABLE=y
 CONFIG_ESP_ERR_TO_NAME_LOOKUP=y
 # end of Common ESP-related
 
+#
+# ESP-Driver:Camera Controller Configurations
+#
+# CONFIG_CAM_CTLR_DVP_CAM_ISR_CACHE_SAFE is not set
+# end of ESP-Driver:Camera Controller Configurations
+
 #
 # ESP-Driver:GPIO Configurations
 #
@@ -1597,8 +1609,11 @@ CONFIG_ESP_PHY_RF_CAL_PARTIAL=y
 # CONFIG_ESP_PHY_RF_CAL_NONE is not set
 # CONFIG_ESP_PHY_RF_CAL_FULL is not set
 CONFIG_ESP_PHY_CALIBRATION_MODE=0
+CONFIG_ESP_PHY_PLL_TRACK_PERIOD_MS=1000
 # CONFIG_ESP_PHY_PLL_TRACK_DEBUG is not set
 # CONFIG_ESP_PHY_RECORD_USED_TIME is not set
+CONFIG_ESP_PHY_IRAM_OPT=y
+# CONFIG_ESP_PHY_DEBUG is not set
 # end of PHY
 
 #
@@ -2081,7 +2096,7 @@ CONFIG_LWIP_DNS_SUPPORT_MDNS_QUERIES=y
 CONFIG_LWIP_TIMERS_ONDEMAND=y
 CONFIG_LWIP_ND6=y
 # CONFIG_LWIP_FORCE_ROUTER_FORWARDING is not set
-CONFIG_LWIP_MAX_SOCKETS=10
+CONFIG_LWIP_MAX_SOCKETS=20
 # CONFIG_LWIP_USE_ONLY_LWIP_SELECT is not set
 # CONFIG_LWIP_SO_LINGER is not set
 CONFIG_LWIP_SO_REUSE=y
@@ -2271,6 +2286,7 @@ CONFIG_MBEDTLS_DYNAMIC_BUFFER=y
 # CONFIG_MBEDTLS_X509_TRUSTED_CERT_CALLBACK is not set
 # CONFIG_MBEDTLS_SSL_CONTEXT_SERIALIZATION is not set
 # CONFIG_MBEDTLS_SSL_KEEP_PEER_CERTIFICATE is not set
+# CONFIG_MBEDTLS_SSL_KEYING_MATERIAL_EXPORT is not set
 CONFIG_MBEDTLS_PKCS7_C=y
 # end of mbedTLS v3.x related
 
@@ -2981,6 +2997,7 @@ CONFIG_BT_NIMBLE_COEX_PHY_CODED_TX_RX_TLIM_DIS=y
 CONFIG_SW_COEXIST_ENABLE=y
 CONFIG_ESP32_WIFI_SW_COEXIST_ENABLE=y
 CONFIG_ESP_WIFI_SW_COEXIST_ENABLE=y
+# CONFIG_CAM_CTLR_DVP_CAM_ISR_IRAM_SAFE is not set
 # CONFIG_MCPWM_ISR_IN_IRAM is not set
 # CONFIG_EVENT_LOOP_PROFILING is not set
 CONFIG_POST_EVENTS_FROM_ISR=y