diff --git a/iot-common-core/src/main/java/cc/iotkit/common/constant/Constants.java b/iot-common-core/src/main/java/cc/iotkit/common/constant/Constants.java
index 188df75..bbd66aa 100755
--- a/iot-common-core/src/main/java/cc/iotkit/common/constant/Constants.java
+++ b/iot-common-core/src/main/java/cc/iotkit/common/constant/Constants.java
@@ -170,6 +170,11 @@ public interface Constants {
      */
     String PROPERTY_CACHE_KEY = "str:iotkit:device:property:%s";
 
+    /**
+     * 设备最后一次通讯缓存key
+     */
+    String LAST_TIME_CACHE_KEY = "str:iotkit:device:lasttime:%s";
+
     /**
      * 三方平台类型
      */
diff --git a/iot-plugin-core/src/main/java/cc/iotkit/plugin/core/thing/actions/ActionType.java b/iot-plugin-core/src/main/java/cc/iotkit/plugin/core/thing/actions/ActionType.java
index f0b9fe0..eb00e68 100755
--- a/iot-plugin-core/src/main/java/cc/iotkit/plugin/core/thing/actions/ActionType.java
+++ b/iot-plugin-core/src/main/java/cc/iotkit/plugin/core/thing/actions/ActionType.java
@@ -39,6 +39,9 @@ public enum ActionType {
     REGISTER("register"),
     //子注册
     SUB_REGISTER("sub_register"),
+    // 心跳ping
+    PING("ping"),
+
     //设备拓扑更新
     TOPOLOGY("topology"),
     //在离线状态变更
diff --git a/iot-plugin-core/src/main/java/cc/iotkit/plugin/core/thing/actions/up/DevicePing.java b/iot-plugin-core/src/main/java/cc/iotkit/plugin/core/thing/actions/up/DevicePing.java
new file mode 100644
index 0000000..0113fe5
--- /dev/null
+++ b/iot-plugin-core/src/main/java/cc/iotkit/plugin/core/thing/actions/up/DevicePing.java
@@ -0,0 +1,50 @@
+/*
+ *
+ *  * | Licensed 未经许可不能去掉「OPENIITA」相关版权
+ *  * +----------------------------------------------------------------------
+ *  * | Author: xw2sy@163.com
+ *  * +----------------------------------------------------------------------
+ *
+ *  Copyright [2024] [OPENIITA]
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ * /
+ */
+
+package cc.iotkit.plugin.core.thing.actions.up;
+
+
+import cc.iotkit.plugin.core.thing.actions.AbstractAction;
+import cc.iotkit.plugin.core.thing.actions.ActionType;
+import cc.iotkit.plugin.core.thing.actions.DeviceState;
+import lombok.*;
+import lombok.experimental.SuperBuilder;
+
+/**
+ * 设备在线状态变更
+ *
+ * @author sjg
+ */
+@EqualsAndHashCode(callSuper = true)
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@SuperBuilder
+@ToString(callSuper = true)
+public class DevicePing extends AbstractAction {
+
+    @Override
+    public ActionType getType() {
+        return ActionType.PING;
+    }
+}