优化多个寄存器读取修改导致卡死，将modbus客户端模块分离主程序

modbus_client.py

@@ -0,0 +1,73 @@
+import modbus_tk
+import modbus_tk.defines as cst
+import modbus_tk.modbus_tcp as modbus_tcp
+import socket
+
+class ModbusClient:
+    def __init__(self):
+        self.master = None
+
+    def connect(self, ip, port):
+        if self.master:
+            self.master.close()
+            self.master = None
+        try:
+            self.master = modbus_tcp.TcpMaster(host=ip, port=port)
+            self.master.set_timeout(5.0)
+            self.master.set_verbose(False)
+            # Test connection
+            self.master.execute(1, cst.READ_HOLDING_REGISTERS, 0, 1)
+            return {'success': True, 'msg': f"Modbus连接成功\nIP: {ip}\n端口: {port}"}
+        except modbus_tk.modbus.ModbusError as e:
+            self.master = None
+            return {'success': False, 'msg': f"Modbus协议错误: {e}\n从站地址: {e.slave}\n功能码: {e.function_code}"}
+        except socket.error as e:
+            self.master = None
+            return {'success': False, 'msg': f"网络连接失败: {e}"}
+        except Exception as e:
+            self.master = None
+            return {'success': False, 'msg': f"连接失败: {str(e)}"}
+
+    def disconnect(self):
+        if self.master:
+            self.master.close()
+            self.master = None
+
+    def read_holding_registers(self, slave_id, address, count):
+        if not self.master:
+            return {'success': False, 'data': None, 'msg': "Modbus未初始化，请先连接"}
+        try:
+            result = self.master.execute(
+                slave=slave_id,
+                function_code=cst.READ_HOLDING_REGISTERS,
+                starting_address=address,
+                quantity_of_x=count
+            )
+            if result:
+                return {'success': True, 'data': list(result), 'msg': "读取成功"}
+            else:
+                return {'success': False, 'data': None, 'msg': "读取结果为空"}
+        except Exception as e:
+            return {'success': False, 'data': None, 'msg': f"读取失败：{e}"}
+
+    def write_single_register(self, slave_id, address, value):
+        if not self.master:
+            return {'success': False, 'msg': "Modbus未连接，请先初始化连接"}
+        if value is None:
+            return {'success': False, 'msg': "未指定要写入的值"}
+        try:
+            write_value = int(value)
+            if not (0 <= write_value <= 65535):
+                return {'success': False, 'msg': "值必须在0-65535范围内(16位无符号整数)"}
+        except ValueError:
+            return {'success': False, 'msg': "写入值必须为整数"}
+        try:
+            self.master.execute(
+                slave=slave_id,
+                function_code=cst.WRITE_SINGLE_REGISTER,
+                starting_address=address,
+                output_value=write_value
+            )
+            return {'success': True, 'msg': f"写入成功: 从机ID={slave_id}，地址={address}，值={write_value}"}
+        except Exception as e:
+            return {'success': False, 'msg': f"写入失败: 从机ID={slave_id}，地址={address}，错误：{e}"}