diff --git a/yudao-module-iot/yudao-module-iot-gateway/src/main/java/cn/iocoder/yudao/module/iot/gateway/codec/tcp/IotTcpJsonDeviceMessageCodec.java b/yudao-module-iot/yudao-module-iot-gateway/src/main/java/cn/iocoder/yudao/module/iot/gateway/codec/tcp/IotTcpJsonDeviceMessageCodec.java
index 368130d98c..10ffbdf5c6 100644
--- a/yudao-module-iot/yudao-module-iot-gateway/src/main/java/cn/iocoder/yudao/module/iot/gateway/codec/tcp/IotTcpJsonDeviceMessageCodec.java
+++ b/yudao-module-iot/yudao-module-iot-gateway/src/main/java/cn/iocoder/yudao/module/iot/gateway/codec/tcp/IotTcpJsonDeviceMessageCodec.java
@@ -1,6 +1,7 @@
 package cn.iocoder.yudao.module.iot.gateway.codec.tcp;
 
 import cn.hutool.core.lang.Assert;
+import cn.hutool.core.util.StrUtil;
 import cn.iocoder.yudao.framework.common.util.json.JsonUtils;
 import cn.iocoder.yudao.module.iot.core.mq.message.IotDeviceMessage;
 import cn.iocoder.yudao.module.iot.gateway.codec.IotDeviceMessageCodec;
@@ -9,8 +10,6 @@ import lombok.Data;
 import lombok.NoArgsConstructor;
 import org.springframework.stereotype.Component;
 
-import java.nio.charset.StandardCharsets;
-
 /**
  * TCP JSON 格式 {@link IotDeviceMessage} 编解码器
  *
@@ -95,7 +94,7 @@ public class IotTcpJsonDeviceMessageCodec implements IotDeviceMessageCodec {
     @Override
     @SuppressWarnings("DataFlowIssue")
     public IotDeviceMessage decode(byte[] bytes) {
-        String jsonStr = new String(bytes, StandardCharsets.UTF_8).trim();
+        String jsonStr = StrUtil.utf8Str(bytes).trim();
         TcpJsonMessage tcpJsonMessage = JsonUtils.parseObject(jsonStr, TcpJsonMessage.class);
         Assert.notNull(tcpJsonMessage, "消息不能为空");
         Assert.notBlank(tcpJsonMessage.getMethod(), "消息方法不能为空");
diff --git a/yudao-module-iot/yudao-module-iot-gateway/src/main/java/cn/iocoder/yudao/module/iot/gateway/protocol/tcp/router/IotTcpUpstreamHandler.java b/yudao-module-iot/yudao-module-iot-gateway/src/main/java/cn/iocoder/yudao/module/iot/gateway/protocol/tcp/router/IotTcpUpstreamHandler.java
index 1659890189..0aff8f72f2 100644
--- a/yudao-module-iot/yudao-module-iot-gateway/src/main/java/cn/iocoder/yudao/module/iot/gateway/protocol/tcp/router/IotTcpUpstreamHandler.java
+++ b/yudao-module-iot/yudao-module-iot-gateway/src/main/java/cn/iocoder/yudao/module/iot/gateway/protocol/tcp/router/IotTcpUpstreamHandler.java
@@ -364,6 +364,7 @@ public class IotTcpUpstreamHandler implements Handler<NetSocket> {
      * @param message   消息
      * @param codecType 消息编解码类型
      */
+    @SuppressWarnings("SameParameterValue")
     private void sendSuccessResponse(NetSocket socket, String requestId, String message, String codecType) {
         sendResponse(socket, true, message, requestId, codecType);
     }
@@ -374,6 +375,7 @@ public class IotTcpUpstreamHandler implements Handler<NetSocket> {
      * @param params 参数对象（通常为 Map 类型）
      * @return 认证参数 DTO，解析失败时返回 null
      */
+    @SuppressWarnings("unchecked")
     private IotDeviceAuthReqDTO parseAuthParams(Object params) {
         if (params == null) {
             return null;
@@ -382,7 +384,6 @@ public class IotTcpUpstreamHandler implements Handler<NetSocket> {
         try {
             // 参数默认为 Map 类型，直接转换
             if (params instanceof java.util.Map) {
-                @SuppressWarnings("unchecked")
                 java.util.Map<String, Object> paramMap = (java.util.Map<String, Object>) params;
                 return new IotDeviceAuthReqDTO()
                         .setClientId(MapUtil.getStr(paramMap, "clientId"))
@@ -398,9 +399,8 @@ public class IotTcpUpstreamHandler implements Handler<NetSocket> {
             // 其他情况尝试 JSON 转换
             String jsonStr = JsonUtils.toJsonString(params);
             return JsonUtils.parseObject(jsonStr, IotDeviceAuthReqDTO.class);
-
         } catch (Exception e) {
-            log.error("[parseAuthParams][解析认证参数失败]", e);
+            log.error("[parseAuthParams][解析认证参数({})失败]", params, e);
             return null;
         }
     }