diff --git a/DBNMQTTool/main.py b/DBNMQTTool/main.py
index 3b77525..8f0120b 100644
--- a/DBNMQTTool/main.py
+++ b/DBNMQTTool/main.py
@@ -1,283 +1,346 @@
 #!/usr/bin/env python3
 """
 DBN MQTT Tool — DLD960 IoT MQTT 设备管理工具
-
-跨平台桌面软件 (tkinter)
+跨平台桌面软件 (PySide6)
 """
 
 import sys
 import os
 import json
-import time
-import tkinter as tk
-from tkinter import ttk, messagebox, scrolledtext
-from threading import Thread
 from datetime import datetime
 from typing import Optional
 
-# 确保项目路径可导入
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
+from PySide6.QtWidgets import (
+    QApplication, QMainWindow, QWidget, QVBoxLayout, QHBoxLayout,
+    QLabel, QLineEdit, QPushButton, QTreeWidget, QTreeWidgetItem,
+    QTabWidget, QTextEdit, QGroupBox, QGridLayout, QCheckBox,
+    QSplitter, QMessageBox, QHeaderView, QFrame,
+)
+from PySide6.QtCore import Qt, QTimer, Signal, Slot
+from PySide6.QtGui import QFont, QColor, QTextCursor
+
 from dbn_mqtt_tool.mqtt_client import MqttClient, BrokerConfig
-from dbn_mqtt_tool.device_manager import DeviceManager, DeviceInfo
+from dbn_mqtt_tool.device_manager import DeviceManager
 from dbn_mqtt_tool.protocol import (
     CMD_DEV_INFO_QUERY, CMD_SSC_NET_QUERY, CMD_IOT_NET_QUERY,
     CMD_IOT_TOPIC_QUERY, CMD_LOOP_PARAM_QUERY,
     CMD_SSC_NET_SET, CMD_IOT_NET_SET, CMD_IOT_TOPIC_SET,
-    CMD_LOOP_PARAM_SET, CMD_REPORT_CONFIG,
     CMD_PWD_VERIFY, CMD_PWD_SET, CMD_FACTORY_RESET, CMD_DEVICE_RESET,
-    CMD_DEV_SERIAL_SET,
-    CMD_LOOP_DATA, CMD_EVENT_REPORT, CMD_HEARTBEAT,
-    ERROR_MSGS, FREQ_LEVELS, OUTPUT_MODES,
+    ERROR_MSGS,
     data_ssc_net_set, data_iot_net_set, data_iot_topic_set,
-    data_loop_param_set, data_report_config,
-    data_pwd_verify, data_pwd_set, data_dev_serial_set,
-    topic_data_loop, topic_data_event, topic_status,
+    data_pwd_verify, data_pwd_set,
 )
 
 
-class DBNMqttTool(tk.Tk):
-    """主窗口"""
+class MainWindow(QMainWindow):
+    _mqtt_status = Signal(bool, str)
+    _mqtt_msg = Signal(str, str, object)
+    _devices_changed = Signal()
 
     def __init__(self):
         super().__init__()
-
-        self.title("DBN MQTT Tool — DLD960 IoT 设备管理")
-        self.geometry("1200x750")
-        self.minsize(900, 600)
+        self.setWindowTitle("DBN MQTT Tool — DLD960 IoT 设备管理")
+        self.resize(1280, 800)
+        self.setMinimumSize(960, 640)
 
         self._mqtt = MqttClient()
         self._devmgr = DeviceManager()
 
-        # MQTT 回调
-        self._mqtt.on_status_change(self._on_mqtt_status)
-        self._mqtt.on_message(self._on_mqtt_message)
+        self._mqtt.on_status_change(lambda c, m: self._mqtt_status.emit(c, m))
+        self._mqtt.on_message(lambda t, s, p: self._mqtt_msg.emit(t, s, p))
+        self._devmgr.on_change(lambda: self._devices_changed.emit())
 
-        # 设备列表变化
-        self._devmgr.on_change(self._refresh_device_list)
-
-        self._pending: dict[int, str] = {}  # msg_id → 命令名
-        self._log_lines: list[str] = []
+        self._mqtt_status.connect(self._on_status)
+        self._mqtt_msg.connect(self._on_message)
+        self._devices_changed.connect(self._refresh_devices)
 
         self._build_ui()
+        self._log("DBN MQTT Tool 已启动")
 
     # ================================================================
     # UI 构建
     # ================================================================
 
     def _build_ui(self):
-        # -- 顶栏：连接 --
-        top_bar = ttk.Frame(self, padding=5)
-        top_bar.pack(fill=tk.X)
+        central = QWidget()
+        self.setCentralWidget(central)
+        root = QVBoxLayout(central)
+        root.setContentsMargins(8, 8, 8, 8)
+        root.setSpacing(6)
 
-        ttk.Label(top_bar, text="Broker:").pack(side=tk.LEFT, padx=(0, 5))
-        self._host_var = tk.StringVar(value="121.37.20.199")
-        ttk.Entry(top_bar, textvariable=self._host_var, width=16).pack(side=tk.LEFT, padx=2)
-        ttk.Label(top_bar, text="Port:").pack(side=tk.LEFT, padx=(5, 2))
-        self._port_var = tk.IntVar(value=1883)
-        ttk.Entry(top_bar, textvariable=self._port_var, width=6).pack(side=tk.LEFT, padx=2)
-        ttk.Label(top_bar, text="用户:").pack(side=tk.LEFT, padx=(5, 2))
-        self._user_var = tk.StringVar()
-        ttk.Entry(top_bar, textvariable=self._user_var, width=10).pack(side=tk.LEFT, padx=2)
-        ttk.Label(top_bar, text="密码:").pack(side=tk.LEFT, padx=(5, 2))
-        self._pass_var = tk.StringVar()
-        ttk.Entry(top_bar, textvariable=self._pass_var, width=10, show="*").pack(side=tk.LEFT, padx=2)
+        # -- 顶栏 --
+        root.addWidget(self._build_top_bar())
 
-        self._btn_connect = ttk.Button(top_bar, text="连接", command=self._toggle_connect)
-        self._btn_connect.pack(side=tk.LEFT, padx=10)
+        # -- 主体 --
+        splitter = QSplitter(Qt.Horizontal)
 
-        self._conn_status = ttk.Label(top_bar, text="● 未连接", foreground="red")
-        self._conn_status.pack(side=tk.LEFT, padx=10)
+        left = self._build_device_panel()
+        splitter.addWidget(left)
 
-        # -- 主体：左右分栏 --
-        main = ttk.PanedWindow(self, orient=tk.HORIZONTAL)
-        main.pack(fill=tk.BOTH, expand=True, padx=5, pady=5)
+        right = QTabWidget()
+        right.addTab(self._build_info_tab(), "设备信息")
+        right.addTab(self._build_config_tab(), "参数配置")
+        right.addTab(self._build_data_tab(), "实时数据")
+        right.addTab(self._build_log_tab(), "日志")
+        splitter.addWidget(right)
 
-        # 左侧：设备列表
-        left = ttk.Frame(main, width=280)
-        main.add(left, weight=0)
+        splitter.setSizes([280, 960])
+        root.addWidget(splitter, 1)
 
-        ttk.Label(left, text="设备列表", font=("", 11, "bold")).pack(anchor=tk.W, pady=(0, 5))
-        self._dev_tree = ttk.Treeview(left, columns=("model",), show="tree headings", height=14)
-        self._dev_tree.heading("#0", text="设备序列码")
-        self._dev_tree.heading("model", text="型号")
-        self._dev_tree.column("#0", width=140)
-        self._dev_tree.column("model", width=80)
-        self._dev_tree.pack(fill=tk.BOTH, expand=True)
-        self._dev_tree.bind("<<TreeviewSelect>>", self._on_device_select)
+    def _build_top_bar(self) -> QWidget:
+        bar = QWidget()
+        layout = QHBoxLayout(bar)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(6)
 
-        btn_frame = ttk.Frame(left)
-        btn_frame.pack(fill=tk.X, pady=5)
-        ttk.Button(btn_frame, text="查询设备信息", command=self._query_dev_info).pack(side=tk.LEFT, padx=2)
-        ttk.Button(btn_frame, text="查询全部", command=self._query_all).pack(side=tk.LEFT, padx=2)
+        layout.addWidget(QLabel("Broker:"))
+        self._host_edit = QLineEdit("121.37.20.199")
+        self._host_edit.setMaximumWidth(140)
+        layout.addWidget(self._host_edit)
 
-        # 右侧：标签页
-        right = ttk.Frame(main)
-        main.add(right, weight=1)
+        layout.addWidget(QLabel("Port:"))
+        self._port_edit = QLineEdit("1883")
+        self._port_edit.setMaximumWidth(60)
+        layout.addWidget(self._port_edit)
 
-        self._notebook = ttk.Notebook(right)
-        self._notebook.pack(fill=tk.BOTH, expand=True)
+        layout.addWidget(QLabel("用户:"))
+        self._user_edit = QLineEdit()
+        self._user_edit.setMaximumWidth(90)
+        layout.addWidget(self._user_edit)
 
-        self._tab_info = self._add_info_tab()
-        self._tab_config = self._add_config_tab()
-        self._tab_data = self._add_data_tab()
-        self._tab_log = self._add_log_tab()
+        layout.addWidget(QLabel("密码:"))
+        self._pass_edit = QLineEdit()
+        self._pass_edit.setMaximumWidth(90)
+        self._pass_edit.setEchoMode(QLineEdit.Password)
+        layout.addWidget(self._pass_edit)
 
-    def _add_info_tab(self):
-        f = ttk.Frame(self._notebook, padding=10)
-        self._notebook.add(f, text="设备信息")
+        self._btn_conn = QPushButton("连接")
+        self._btn_conn.setFixedWidth(70)
+        self._btn_conn.clicked.connect(self._toggle_connect)
+        layout.addWidget(self._btn_conn)
 
-        self._info_text = scrolledtext.ScrolledText(f, height=18, width=60, state=tk.DISABLED,
-                                                     font=("Consolas", 10))
-        self._info_text.pack(fill=tk.BOTH, expand=True)
-        return f
+        self._status_label = QLabel("● 未连接")
+        self._status_label.setStyleSheet("color: red; font-weight: bold;")
+        layout.addWidget(self._status_label)
 
-    def _add_config_tab(self):
-        f = ttk.Frame(self._notebook, padding=10)
-        self._notebook.add(f, text="参数配置")
+        layout.addStretch()
+        return bar
 
-        row = 0
-        # -- 网口配置 --
-        ttk.Label(f, text="▸ SSC 网络配置", font=("", 10, "bold")).grid(row=row, column=0, columnspan=4, sticky=tk.W, pady=(0, 5))
-        row += 1
-        for label, var_name, col in [
-            ("设备 IP", "ssc_ip", 0), ("子网掩码", "ssc_mask", 1),
-            ("网关", "ssc_gw", 2), ("LSSC IP", "ssc_lssc", 3),
-            ("DNS", "ssc_dns", 0), ("端口", "ssc_port", 1),
-        ]:
-            ttk.Label(f, text=label + ":").grid(row=row, column=col * 2, sticky=tk.E, padx=2, pady=1)
-            var = tk.StringVar()
-            setattr(self, f"_var_{var_name}", var)
-            ttk.Entry(f, textvariable=var, width=15).grid(row=row, column=col * 2 + 1, sticky=tk.W, padx=2, pady=1)
-            if col == 3 or (col == 1 and var_name == "ssc_port"):
-                row += 1
+    def _build_device_panel(self) -> QWidget:
+        w = QWidget()
+        layout = QVBoxLayout(w)
+        layout.setContentsMargins(0, 0, 0, 0)
 
-        ttk.Button(f, text="查询 SSC 网络", command=self._query_ssc_net).grid(row=row, column=0, pady=5, padx=2, sticky=tk.W)
-        ttk.Button(f, text="设置 SSC 网络", command=self._set_ssc_net).grid(row=row, column=1, pady=5, padx=2, sticky=tk.W)
-        row += 1
+        layout.addWidget(QLabel("<b>设备列表</b>"))
 
-        # -- IoT 配置 --
-        ttk.Separator(f, orient=tk.HORIZONTAL).grid(row=row, column=0, columnspan=4, sticky=tk.EW, pady=10)
-        row += 1
-        ttk.Label(f, text="▸ IoT 网络配置", font=("", 10, "bold")).grid(row=row, column=0, columnspan=4, sticky=tk.W, pady=(0, 5))
-        row += 1
-        for label, var_name in [
+        self._dev_tree = QTreeWidget()
+        self._dev_tree.setHeaderLabels(["设备序列码", "型号"])
+        self._dev_tree.setRootIsDecorated(False)
+        self._dev_tree.header().setStretchLastSection(True)
+        self._dev_tree.itemSelectionChanged.connect(self._on_dev_select)
+        layout.addWidget(self._dev_tree, 1)
+
+        btn_row = QHBoxLayout()
+        btn_query = QPushButton("查询设备信息")
+        btn_query.clicked.connect(self._query_dev_info)
+        btn_row.addWidget(btn_query)
+
+        btn_all = QPushButton("查询全部")
+        btn_all.clicked.connect(self._query_all)
+        btn_row.addWidget(btn_all)
+
+        layout.addLayout(btn_row)
+        return w
+
+    def _build_info_tab(self) -> QWidget:
+        w = QWidget()
+        layout = QVBoxLayout(w)
+        self._info_text = QTextEdit()
+        self._info_text.setReadOnly(True)
+        self._info_text.setFont(QFont("Consolas", 10))
+        layout.addWidget(self._info_text)
+        return w
+
+    def _build_config_tab(self) -> QWidget:
+        w = QWidget()
+        layout = QVBoxLayout(w)
+
+        # -- SSC 网络 --
+        g1 = QGroupBox("SSC 网络配置")
+        g1_layout = QGridLayout(g1)
+        fields_ssc = [
+            ("设备 IP", "ssc_ip"), ("子网掩码", "ssc_mask"),
+            ("网关", "ssc_gw"), ("LSSC IP", "ssc_lssc"),
+            ("DNS", "ssc_dns"), ("端口", "ssc_port"),
+        ]
+        for i, (label, name) in enumerate(fields_ssc):
+            g1_layout.addWidget(QLabel(label + ":"), i // 2, (i % 2) * 2)
+            edit = QLineEdit()
+            edit.setMaximumWidth(140)
+            g1_layout.addWidget(edit, i // 2, (i % 2) * 2 + 1)
+            setattr(self, f"_edit_{name}", edit)
+
+        btn_row = QHBoxLayout()
+        b1 = QPushButton("查询")
+        b1.clicked.connect(self._query_ssc_net)
+        b2 = QPushButton("设置")
+        b2.clicked.connect(self._set_ssc_net)
+        btn_row.addWidget(b1)
+        btn_row.addWidget(b2)
+        btn_row.addStretch()
+        g1_layout.addLayout(btn_row, 3, 0, 1, 4)
+        layout.addWidget(g1)
+
+        # -- IoT 网络 --
+        g2 = QGroupBox("IoT 网络配置")
+        g2_layout = QGridLayout(g2)
+        fields_iot = [
             ("MQTT Host", "iot_host"), ("MQTT Port", "iot_port"),
-            ("Client ID", "iot_cid"), ("用户名", "iot_user"), ("密码", "iot_pass"),
+            ("Client ID", "iot_cid"), ("用户名", "iot_user"),
+            ("密码", "iot_pass"),
+        ]
+        for i, (label, name) in enumerate(fields_iot):
+            g2_layout.addWidget(QLabel(label + ":"), i, 0)
+            edit = QLineEdit()
+            edit.setMinimumWidth(200)
+            if "pass" in name:
+                edit.setEchoMode(QLineEdit.Password)
+            g2_layout.addWidget(edit, i, 1)
+            setattr(self, f"_edit_{name}", edit)
+
+        btn_row2 = QHBoxLayout()
+        b3 = QPushButton("查询")
+        b3.clicked.connect(self._query_iot_net)
+        b4 = QPushButton("设置")
+        b4.clicked.connect(self._set_iot_net)
+        btn_row2.addWidget(b3)
+        btn_row2.addWidget(b4)
+        btn_row2.addStretch()
+        g2_layout.addLayout(btn_row2, len(fields_iot), 0, 1, 2)
+        layout.addWidget(g2)
+
+        # -- Topic --
+        g3 = QGroupBox("IoT Topic 配置")
+        g3_layout = QGridLayout(g3)
+        self._chk_cid = QCheckBox("Client ID 启用")
+        self._chk_cid.setChecked(True)
+        g3_layout.addWidget(self._chk_cid, 0, 0, 1, 2)
+
+        g3_layout.addWidget(QLabel("Topic 发布:"), 1, 0)
+        self._edit_topic_pub = QLineEdit()
+        self._edit_topic_pub.setMinimumWidth(250)
+        g3_layout.addWidget(self._edit_topic_pub, 1, 1)
+
+        g3_layout.addWidget(QLabel("Topic 订阅:"), 2, 0)
+        self._edit_topic_sub = QLineEdit()
+        g3_layout.addWidget(self._edit_topic_sub, 2, 1)
+
+        btn_row3 = QHBoxLayout()
+        b5 = QPushButton("查询")
+        b5.clicked.connect(self._query_iot_topic)
+        b6 = QPushButton("设置")
+        b6.clicked.connect(self._set_iot_topic)
+        btn_row3.addWidget(b5)
+        btn_row3.addWidget(b6)
+        btn_row3.addStretch()
+        g3_layout.addLayout(btn_row3, 3, 0, 1, 2)
+        layout.addWidget(g3)
+
+        # -- 控制 --
+        g4 = QGroupBox("控制命令")
+        g4_layout = QGridLayout(g4)
+        g4_layout.addWidget(QLabel("密码:"), 0, 0)
+        self._edit_pwd = QLineEdit()
+        self._edit_pwd.setMaximumWidth(100)
+        self._edit_pwd.setEchoMode(QLineEdit.Password)
+        g4_layout.addWidget(self._edit_pwd, 0, 1)
+        g4_layout.addWidget(QLabel("新密码:"), 0, 2)
+        self._edit_new_pwd = QLineEdit()
+        self._edit_new_pwd.setMaximumWidth(100)
+        self._edit_new_pwd.setEchoMode(QLineEdit.Password)
+        g4_layout.addWidget(self._edit_new_pwd, 0, 3)
+
+        btn_row4 = QHBoxLayout()
+        for label, slot in [
+            ("验证密码", self._do_pwd_verify), ("设置密码", self._do_pwd_set),
+            ("出厂初始化", self._do_factory_reset), ("设备复位", self._do_device_reset),
         ]:
-            ttk.Label(f, text=label + ":").grid(row=row, column=0, sticky=tk.E, padx=2, pady=1)
-            var = tk.StringVar()
-            setattr(self, f"_var_{var_name}", var)
-            w = ttk.Entry(f, textvariable=var, width=30)
-            if "pass" in var_name.lower():
-                w.configure(show="*")
-            w.grid(row=row, column=1, columnspan=3, sticky=tk.W, padx=2, pady=1)
-            row += 1
+            btn = QPushButton(label)
+            btn.clicked.connect(slot)
+            btn_row4.addWidget(btn)
+        btn_row4.addStretch()
+        g4_layout.addLayout(btn_row4, 1, 0, 1, 4)
+        layout.addWidget(g4)
 
-        ttk.Button(f, text="查询 IoT 网络", command=self._query_iot_net).grid(row=row, column=0, pady=5, padx=2, sticky=tk.W)
-        ttk.Button(f, text="设置 IoT 网络", command=self._set_iot_net).grid(row=row, column=1, pady=5, padx=2, sticky=tk.W)
-        row += 1
+        layout.addStretch()
+        return w
 
-        # -- Topic 配置 --
-        ttk.Separator(f, orient=tk.HORIZONTAL).grid(row=row, column=0, columnspan=4, sticky=tk.EW, pady=10)
-        row += 1
-        ttk.Label(f, text="▸ IoT Topic 配置", font=("", 10, "bold")).grid(row=row, column=0, columnspan=4, sticky=tk.W, pady=(0, 5))
-        row += 1
-        self._var_cid_enable = tk.BooleanVar(value=True)
-        ttk.Checkbutton(f, text="Client ID 启用", variable=self._var_cid_enable).grid(row=row, column=0, columnspan=2, sticky=tk.W)
-        row += 1
-        for label, var_name in [("Topic 发布", "topic_pub"), ("Topic 订阅", "topic_sub")]:
-            ttk.Label(f, text=label + ":").grid(row=row, column=0, sticky=tk.E, padx=2, pady=1)
-            var = tk.StringVar()
-            setattr(self, f"_var_{var_name}", var)
-            ttk.Entry(f, textvariable=var, width=40).grid(row=row, column=1, columnspan=3, sticky=tk.W, padx=2, pady=1)
-            row += 1
+    def _build_data_tab(self) -> QWidget:
+        w = QWidget()
+        layout = QVBoxLayout(w)
 
-        ttk.Button(f, text="查询 Topic", command=self._query_iot_topic).grid(row=row, column=0, pady=5, padx=2, sticky=tk.W)
-        ttk.Button(f, text="设置 Topic", command=self._set_iot_topic).grid(row=row, column=1, pady=5, padx=2, sticky=tk.W)
-        row += 1
+        layout.addWidget(QLabel("<b>线圈传感数据 (loop_data)</b>"))
+        self._loop_text = QTextEdit()
+        self._loop_text.setReadOnly(True)
+        self._loop_text.setFont(QFont("Consolas", 10))
+        layout.addWidget(self._loop_text, 2)
 
-        # -- 控制区 --
-        ttk.Separator(f, orient=tk.HORIZONTAL).grid(row=row, column=0, columnspan=4, sticky=tk.EW, pady=10)
-        row += 1
-        ttk.Label(f, text="▸ 控制命令", font=("", 10, "bold")).grid(row=row, column=0, columnspan=4, sticky=tk.W, pady=(0, 5))
-        row += 1
-        self._var_pwd = tk.StringVar()
-        ttk.Label(f, text="密码:").grid(row=row, column=0, sticky=tk.E, padx=2)
-        ttk.Entry(f, textvariable=self._var_pwd, width=10, show="*").grid(row=row, column=1, sticky=tk.W, padx=2)
-        self._var_new_pwd = tk.StringVar()
-        ttk.Label(f, text="新密码:").grid(row=row, column=2, sticky=tk.E, padx=2)
-        ttk.Entry(f, textvariable=self._var_new_pwd, width=10, show="*").grid(row=row, column=3, sticky=tk.W, padx=2)
-        row += 1
-        ttk.Button(f, text="验证密码", command=self._do_pwd_verify).grid(row=row, column=0, pady=5, padx=2)
-        ttk.Button(f, text="设置密码", command=self._do_pwd_set).grid(row=row, column=1, pady=5, padx=2)
-        ttk.Button(f, text="出厂初始化", command=self._do_factory_reset).grid(row=row, column=2, pady=5, padx=2)
-        ttk.Button(f, text="设备复位", command=self._do_device_reset).grid(row=row, column=3, pady=5, padx=2)
+        layout.addWidget(QLabel("<b>事件上报 (event_report)</b>"))
+        self._event_text = QTextEdit()
+        self._event_text.setReadOnly(True)
+        self._event_text.setFont(QFont("Consolas", 10))
+        layout.addWidget(self._event_text, 1)
+        return w
 
-        return f
+    def _build_log_tab(self) -> QWidget:
+        w = QWidget()
+        layout = QVBoxLayout(w)
+        self._log_text = QTextEdit()
+        self._log_text.setReadOnly(True)
+        self._log_text.setFont(QFont("Consolas", 9))
+        layout.addWidget(self._log_text, 1)
 
-    def _add_data_tab(self):
-        f = ttk.Frame(self._notebook, padding=10)
-        self._notebook.add(f, text="实时数据")
-
-        # 线圈数据
-        ttk.Label(f, text="▸ 线圈传感数据 (loop_data)", font=("", 10, "bold")).pack(anchor=tk.W)
-        self._loop_text = scrolledtext.ScrolledText(f, height=10, width=80, state=tk.DISABLED,
-                                                     font=("Consolas", 10))
-        self._loop_text.pack(fill=tk.BOTH, expand=True, pady=5)
-
-        # 事件
-        ttk.Label(f, text="▸ 事件上报 (event_report)", font=("", 10, "bold")).pack(anchor=tk.W)
-        self._event_text = scrolledtext.ScrolledText(f, height=6, width=80, state=tk.DISABLED,
-                                                      font=("Consolas", 10))
-        self._event_text.pack(fill=tk.BOTH, expand=True, pady=5)
-
-        return f
-
-    def _add_log_tab(self):
-        f = ttk.Frame(self._notebook, padding=10)
-        self._notebook.add(f, text="日志")
-
-        self._log_text = scrolledtext.ScrolledText(f, height=18, width=60, state=tk.DISABLED,
-                                                    font=("Consolas", 9))
-        self._log_text.pack(fill=tk.BOTH, expand=True)
-
-        ttk.Button(f, text="清空", command=self._clear_log).pack(anchor=tk.E, pady=5)
-        return f
+        btn_clear = QPushButton("清空")
+        btn_clear.clicked.connect(self._log_text.clear)
+        layout2 = QHBoxLayout()
+        layout2.addStretch()
+        layout2.addWidget(btn_clear)
+        layout.addLayout(layout2)
+        return w
 
     # ================================================================
-    # MQTT 操作
+    # MQTT
     # ================================================================
 
     def _toggle_connect(self):
         if self._mqtt.connected:
             self._mqtt.disconnect()
         else:
-            config = BrokerConfig(
-                host=self._host_var.get(),
-                port=self._port_var.get(),
-                username=self._user_var.get(),
-                password=self._pass_var.get(),
+            cfg = BrokerConfig(
+                host=self._host_edit.text(),
+                port=int(self._port_edit.text() or "1883"),
+                username=self._user_edit.text(),
+                password=self._pass_edit.text(),
             )
-            self._mqtt.connect(config)
-            self._log(f"正在连接 {config.host}:{config.port} ...")
+            self._mqtt.connect(cfg)
+            self._log(f"正在连接 {cfg.host}:{cfg.port} ...")
 
-    def _on_mqtt_status(self, connected: bool, msg: str):
-        self.after(0, lambda: self._update_conn_status(connected, msg))
-
-    def _update_conn_status(self, connected: bool, msg: str):
+    @Slot(bool, str)
+    def _on_status(self, connected: bool, msg: str):
         if connected:
-            self._btn_connect.configure(text="断开")
-            self._conn_status.configure(text="● 已连接", foreground="green")
+            self._btn_conn.setText("断开")
+            self._status_label.setText("● 已连接")
+            self._status_label.setStyleSheet("color: green; font-weight: bold;")
         else:
-            self._btn_connect.configure(text="连接")
-            self._conn_status.configure(text="● 未连接", foreground="red")
+            self._btn_conn.setText("连接")
+            self._status_label.setText("● 未连接")
+            self._status_label.setStyleSheet("color: red; font-weight: bold;")
         self._log(msg)
 
-    def _on_mqtt_message(self, topic: str, dev_serial: str, payload: dict):
-        self.after(0, lambda: self._handle_message(topic, dev_serial, payload))
-
-    def _handle_message(self, topic: str, dev_serial: str, payload: dict):
+    @Slot(str, str, object)
+    def _on_message(self, topic: str, dev_serial: str, payload: dict):
         cmd = payload.get("cmd", "")
         ts = datetime.fromtimestamp(payload.get("ts", 0)).strftime("%H:%M:%S")
 
@@ -289,26 +352,25 @@ class DBNMqttTool(tk.Tk):
             if code == 0:
                 if cmd == CMD_DEV_INFO_QUERY:
                     self._devmgr.update_from_dev_info(dev_serial, data)
-                    self._show_info(data)
-                elif cmd in (CMD_SSC_NET_QUERY, CMD_IOT_NET_QUERY, CMD_IOT_TOPIC_QUERY):
-                    self._show_info({cmd: data})
-                elif cmd == CMD_LOOP_PARAM_QUERY:
-                    self._show_info({cmd: data})
+                    self._show_json(data)
+                elif cmd in (CMD_SSC_NET_QUERY, CMD_IOT_NET_QUERY, CMD_IOT_TOPIC_QUERY, CMD_LOOP_PARAM_QUERY):
+                    self._show_json({cmd: data})
             else:
-                self._show_info({"error": f"code={code} {pmsg} ({ERROR_MSGS.get(code, '?')})"})
+                self._show_json({"error": f"code={code} {pmsg} ({ERROR_MSGS.get(code, '?')})"})
 
         elif "/dev/data/loop" in topic:
             data = payload.get("data", {})
             self._devmgr.update_loop_data(dev_serial, data)
-            self._log(f"[{ts}] {dev_serial} ← loop_data ({len(data.get('channels', []))} 通道)")
-            self._append_data(self._loop_text, json.dumps(payload, indent=2, ensure_ascii=False))
+            chs = len(data.get("channels", []))
+            self._log(f"[{ts}] {dev_serial} ← loop_data ({chs} 通道)")
+            self._append_text(self._loop_text, json.dumps(payload, indent=2, ensure_ascii=False))
 
         elif "/dev/data/event" in topic:
             data = payload.get("data", {})
             self._devmgr.update_event(dev_serial, data)
-            events = data.get("events", [])
-            self._log(f"[{ts}] {dev_serial} ← event_report ({len(events)} 事件)")
-            self._append_data(self._event_text, json.dumps(payload, indent=2, ensure_ascii=False))
+            evt_count = len(data.get("events", []))
+            self._log(f"[{ts}] {dev_serial} ← event_report ({evt_count} 事件)")
+            self._append_text(self._event_text, json.dumps(payload, indent=2, ensure_ascii=False))
 
         elif "/dev/status" in topic:
             data = payload.get("data", {})
@@ -320,18 +382,16 @@ class DBNMqttTool(tk.Tk):
     # ================================================================
 
     def _selected_dev(self) -> Optional[str]:
-        sel = self._dev_tree.selection()
-        if sel:
-            return self._dev_tree.item(sel[0], "text")
-        return None
+        items = self._dev_tree.selectedItems()
+        return items[0].text(0).lstrip("●○ ") if items else None
 
     def _require_dev(self) -> Optional[str]:
         sn = self._selected_dev()
         if not sn:
-            messagebox.showwarning("提示", "请先在左侧选择一个设备")
+            QMessageBox.warning(self, "提示", "请先选择一个设备")
             return None
         if not self._mqtt.connected:
-            messagebox.showwarning("提示", "请先连接 MQTT Broker")
+            QMessageBox.warning(self, "提示", "请先连接 MQTT Broker")
             return None
         return sn
 
@@ -340,10 +400,10 @@ class DBNMqttTool(tk.Tk):
         if not sn:
             return
         try:
-            msg_id = self._mqtt.send_command(sn, cmd, data)
-            self._log(f"→ {sn} {cmd} (msg_id={msg_id})")
+            mid = self._mqtt.send_command(sn, cmd, data)
+            self._log(f"→ {sn} {cmd} (msg_id={mid})")
         except Exception as e:
-            messagebox.showerror("发送失败", str(e))
+            QMessageBox.critical(self, "发送失败", str(e))
 
     def _query_dev_info(self):
         self._send_cmd(CMD_DEV_INFO_QUERY)
@@ -364,12 +424,12 @@ class DBNMqttTool(tk.Tk):
 
     def _set_ssc_net(self):
         self._send_cmd(CMD_SSC_NET_SET, data_ssc_net_set(
-            dev_ip=self._var_ssc_ip.get(),
-            subnet_mask=self._var_ssc_mask.get(),
-            route_ip=self._var_ssc_gw.get(),
-            lssc_ip=self._var_ssc_lssc.get(),
-            dns=self._var_ssc_dns.get(),
-            port=int(self._var_ssc_port.get() or "0"),
+            dev_ip=self._edit_ssc_ip.text(),
+            subnet_mask=self._edit_ssc_mask.text(),
+            route_ip=self._edit_ssc_gw.text(),
+            lssc_ip=self._edit_ssc_lssc.text(),
+            dns=self._edit_ssc_dns.text(),
+            port=int(self._edit_ssc_port.text() or "0"),
         ))
 
     def _query_iot_net(self):
@@ -377,11 +437,11 @@ class DBNMqttTool(tk.Tk):
 
     def _set_iot_net(self):
         self._send_cmd(CMD_IOT_NET_SET, data_iot_net_set(
-            host=self._var_iot_host.get(),
-            port=int(self._var_iot_port.get() or "1883"),
-            client_id=self._var_iot_cid.get(),
-            username=self._var_iot_user.get(),
-            password=self._var_iot_pass.get(),
+            host=self._edit_iot_host.text(),
+            port=int(self._edit_iot_port.text() or "1883"),
+            client_id=self._edit_iot_cid.text(),
+            username=self._edit_iot_user.text(),
+            password=self._edit_iot_pass.text(),
         ))
 
     def _query_iot_topic(self):
@@ -389,60 +449,67 @@ class DBNMqttTool(tk.Tk):
 
     def _set_iot_topic(self):
         self._send_cmd(CMD_IOT_TOPIC_SET, data_iot_topic_set(
-            client_id_enable=self._var_cid_enable.get(),
-            topic_pub=self._var_topic_pub.get(),
-            topic_sub=self._var_topic_sub.get(),
+            client_id_enable=self._chk_cid.isChecked(),
+            topic_pub=self._edit_topic_pub.text(),
+            topic_sub=self._edit_topic_sub.text(),
         ))
 
     def _do_pwd_verify(self):
-        pwd = self._var_pwd.get()
+        pwd = self._edit_pwd.text()
         if not pwd:
-            messagebox.showwarning("提示", "请输入密码")
+            QMessageBox.warning(self, "提示", "请输入密码")
             return
         self._send_cmd(CMD_PWD_VERIFY, data_pwd_verify(pwd))
 
     def _do_pwd_set(self):
-        old = self._var_pwd.get()
-        new = self._var_new_pwd.get()
+        old = self._edit_pwd.text()
+        new = self._edit_new_pwd.text()
         if not old or not new:
-            messagebox.showwarning("提示", "请输入旧密码和新密码")
+            QMessageBox.warning(self, "提示", "请输入旧密码和新密码")
             return
         self._send_cmd(CMD_PWD_SET, data_pwd_set(old, new))
 
     def _do_factory_reset(self):
-        if not messagebox.askyesno("确认", "确定要恢复出厂设置吗？此操作不可撤销！"):
-            return
-        self._send_cmd(CMD_FACTORY_RESET)
+        r = QMessageBox.question(self, "确认", "确定要恢复出厂设置吗？\n此操作不可撤销！",
+                                  QMessageBox.Yes | QMessageBox.No)
+        if r == QMessageBox.Yes:
+            self._send_cmd(CMD_FACTORY_RESET)
 
     def _do_device_reset(self):
-        if not messagebox.askyesno("确认", "确定要复位设备吗？设备将重启。"):
-            return
-        self._send_cmd(CMD_DEVICE_RESET)
+        r = QMessageBox.question(self, "确认", "确定要复位设备吗？设备将重启。",
+                                  QMessageBox.Yes | QMessageBox.No)
+        if r == QMessageBox.Yes:
+            self._send_cmd(CMD_DEVICE_RESET)
 
     # ================================================================
     # UI 更新
     # ================================================================
 
-    def _refresh_device_list(self):
+    @Slot()
+    def _refresh_devices(self):
         tree = self._dev_tree
-        current = set(tree.get_children(""))
-        devices = self._devmgr.devices
+        existing = {}
+        for i in range(tree.topLevelItemCount()):
+            item = tree.topLevelItem(i)
+            sn = item.text(0).lstrip("●○ ")
+            existing[sn] = item
 
-        for sn, dev in devices.items():
-            iid = sn
+        for sn, dev in self._devmgr.devices.items():
             status = "●" if dev.online else "○"
-            display = f"{status} {sn}"
             model = dev.model or "?"
-            if iid in current:
-                tree.item(iid, text=display, values=(model,))
-                current.discard(iid)
+            if sn in existing:
+                existing[sn].setText(0, f"{status} {sn}")
+                existing[sn].setText(1, model)
+                del existing[sn]
             else:
-                tree.insert("", tk.END, iid=iid, text=display, values=(model,))
+                item = QTreeWidgetItem([f"{status} {sn}", model])
+                tree.addTopLevelItem(item)
 
-        for stale in current:
-            tree.delete(stale)
+        for sn, item in existing.items():
+            idx = tree.indexOfTopLevelItem(item)
+            tree.takeTopLevelItem(idx)
 
-    def _on_device_select(self, event):
+    def _on_dev_select(self):
         sn = self._selected_dev()
         if sn and sn in self._devmgr.devices:
             dev = self._devmgr.devices[sn]
@@ -458,40 +525,28 @@ class DBNMqttTool(tk.Tk):
                 "online": dev.online,
                 "last_seen": dev.last_seen.strftime("%Y-%m-%d %H:%M:%S") if dev.last_seen else "—",
             }
-            self._show_info(info)
+            self._show_json(info)
 
-    def _show_info(self, data: dict):
-        self._info_text.configure(state=tk.NORMAL)
-        self._info_text.delete("1.0", tk.END)
-        self._info_text.insert(tk.END, json.dumps(data, indent=2, ensure_ascii=False))
-        self._info_text.configure(state=tk.DISABLED)
+    def _show_json(self, data: dict):
+        self._info_text.setPlainText(json.dumps(data, indent=2, ensure_ascii=False))
 
-    def _append_data(self, widget: scrolledtext.ScrolledText, text: str):
-        widget.configure(state=tk.NORMAL)
+    def _append_text(self, widget: QTextEdit, text: str):
         ts = datetime.now().strftime("%H:%M:%S")
-        widget.insert(tk.END, f"--- {ts} ---\n{text}\n\n")
-        widget.see(tk.END)
-        widget.configure(state=tk.DISABLED)
+        widget.append(f"--- {ts} ---\n{text}\n")
+        widget.moveCursor(QTextCursor.End)
 
     def _log(self, msg: str):
         ts = datetime.now().strftime("%H:%M:%S")
-        line = f"[{ts}] {msg}"
-        self._log_lines.append(line)
-        self._log_text.configure(state=tk.NORMAL)
-        self._log_text.insert(tk.END, line + "\n")
-        self._log_text.see(tk.END)
-        self._log_text.configure(state=tk.DISABLED)
-
-    def _clear_log(self):
-        self._log_text.configure(state=tk.NORMAL)
-        self._log_text.delete("1.0", tk.END)
-        self._log_text.configure(state=tk.DISABLED)
-        self._log_lines.clear()
+        self._log_text.append(f"[{ts}] {msg}")
+        self._log_text.moveCursor(QTextCursor.End)
 
 
 def main():
-    app = DBNMqttTool()
-    app.mainloop()
+    app = QApplication(sys.argv)
+    app.setStyle("Fusion")
+    win = MainWindow()
+    win.show()
+    sys.exit(app.exec())
 
 
 if __name__ == "__main__":