diff --git a/jsowell-common/src/main/java/com/jsowell/common/enums/ebike/PortStatusEnum.java b/jsowell-common/src/main/java/com/jsowell/common/enums/ebike/PortStatusEnum.java
new file mode 100644
index 000000000..8ec21bbf2
--- /dev/null
+++ b/jsowell-common/src/main/java/com/jsowell/common/enums/ebike/PortStatusEnum.java
@@ -0,0 +1,49 @@
+package com.jsowell.common.enums.ebike;
+
+/**
+ * 电单车端口状态
+ */
+public enum PortStatusEnum {
+    IDLE(0, "空闲"),
+    CHARGING(1, "充电中"),
+    CHARGER_CONNECTED_NOT_CHARGING_USER(2, "有充电器但未充电（用户未启动充电）"),
+    CHARGER_CONNECTED_NOT_CHARGING_FULL(3, "有充电器但未充电（已充满电）"),
+    UNMEASURABLE(4, "该路无法计量"),
+    FLOAT_CHARGE(5, "浮充"),
+    MEMORY_DAMAGE(6, "存储器损坏"),
+    SOCKET_SPRING_STUCK(7, "插座弹片卡住故障"),
+    CONTACT_BAD_OR_FUSE_BLOWN(8, "接触不良或保险丝烧断故障"),
+    RELAY_GLUE(9, "算法-继电器粘连"),
+    HALL_SWITCH_DAMAGE(10, "霍尔开关损坏（即插入检测传感器）"),
+    PRE_INSPECTION_RELAY_OR_FUSE_BAD(11, "预检-继电器坏或保险丝断"),
+    PRE_INSPECTION_LOAD_SHORT_CIRCUIT(13, "预检-负载短路"),
+    FILTERED_PRE_INSPECTION_RELAY_GLUE(14, "过滤性预检-继电器粘连"),
+    CARD_CHIP_DAMAGE(15, "刷卡芯片损坏故障"),
+    DETECTION_CIRCUIT_FAULT(16, "检测电路故障");
+
+    private final int value;
+    private final String description;
+
+    PortStatusEnum(int value, String description) {
+        this.value = value;
+        this.description = description;
+    }
+
+    public int getValue() {
+        return value;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    // 新增方法: 根据 value 获取描述
+    public static String getDescriptionByValue(int value) {
+        for (PortStatusEnum status : values()) {
+            if (status.getValue() == value) {
+                return status.getDescription();
+            }
+        }
+        return "未知状态";
+    }
+}
\ No newline at end of file
diff --git a/jsowell-netty/src/main/java/com/jsowell/netty/domain/ebike/deviceupload/DeviceHeartbeat.java b/jsowell-netty/src/main/java/com/jsowell/netty/domain/ebike/deviceupload/DeviceHeartbeat.java
new file mode 100644
index 000000000..a2e7209e7
--- /dev/null
+++ b/jsowell-netty/src/main/java/com/jsowell/netty/domain/ebike/deviceupload/DeviceHeartbeat.java
@@ -0,0 +1,64 @@
+package com.jsowell.netty.domain.ebike.deviceupload;
+
+import com.google.common.collect.Lists;
+import com.jsowell.common.enums.ebike.PortStatusEnum;
+import com.jsowell.common.util.BytesUtil;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * 此为心跳包，间隔时间默认为3分钟，方便服务器管理SocketIP
+ * 设备如2次收不到服务器应答，则进入离线状态
+ */
+@Getter
+@Setter
+public class DeviceHeartbeat {
+    /**
+     * 电压：设备的当前电压（打包发送心跳包指令时的当前时间点的实时电压）
+     */
+    private String voltage;
+
+    /**
+     * 端口数量：表示设备总共有多少个端口，和后面的“端口状态”配套
+     */
+    private int portNumber;
+
+    /**
+     * 注4、各端口状态：一个字节表示一个端口，和“端口数量”匹配，
+     * 如端口数量是16，则“各端口状态”为16字节；
+     * 每个字节表示的意思，
+     * 0=空闲，1=充电中，2=有充电器但未充电（用户未启动充电），3=有充电器但未充电（已充满电） 4=该路无法计量，5=浮充，6=存储器损坏，
+     * 7＝插座弹片卡住故障，8＝接触不良或保险丝烧断故障，9＝(算法-继电器粘连)，0x0A=霍尔开关损坏（即插入检测传感器）。
+     * 0x0B=（预检-继电器坏或保险丝断），0x0D=（预检-负载短路）。0x0E=(过滤性预检-继电器粘连),0x0F=(刷卡芯片损坏故障)，0x10=（检测电路故障）
+     */
+    private List<String> portStatus;
+
+    /**
+     * 信号强度：指分机与主机之间的无线信号强度，如LORA信号。00则为有线组网或无信号强度功能
+     */
+    private String rssi;
+
+    /**
+     * 当前环境温度：表示当前设备内的温度，可能和真正的当前环境温度有一定的误差，如00则表示无此功能
+     */
+    private String temperature;
+
+
+    public DeviceHeartbeat(byte[] dataBytes) {
+        this.voltage = BytesUtil.bytesToIntLittle(Arrays.copyOfRange(dataBytes, 0, 2)) + "";
+        this.portNumber = BytesUtil.bytesToIntLittle(Arrays.copyOfRange(dataBytes, 2, 3));
+
+        byte[] statusBytes = Arrays.copyOfRange(dataBytes, 3, this.portNumber);
+        List<String> statusList = Lists.newArrayList();
+        for (byte statusByte : statusBytes) {
+            int status = BytesUtil.bytesToIntLittle(new byte[]{statusByte});
+            statusList.add(PortStatusEnum.getDescriptionByValue(status));
+        }
+        this.portStatus = statusList;
+        this.rssi = BytesUtil.bcd2StrLittle(Arrays.copyOfRange(dataBytes, dataBytes.length - 2, dataBytes.length - 1));
+        this.temperature = BytesUtil.bcd2StrLittle(Arrays.copyOfRange(dataBytes, dataBytes.length - 1, dataBytes.length));
+    }
+}
diff --git a/jsowell-netty/src/main/java/com/jsowell/netty/domain/ebike/deviceupload/EBikeMessageCmd20.java b/jsowell-netty/src/main/java/com/jsowell/netty/domain/ebike/deviceupload/EBikeMessageCmd20.java
index f7593f616..5e90fb1fe 100644
--- a/jsowell-netty/src/main/java/com/jsowell/netty/domain/ebike/deviceupload/EBikeMessageCmd20.java
+++ b/jsowell-netty/src/main/java/com/jsowell/netty/domain/ebike/deviceupload/EBikeMessageCmd20.java
@@ -1,12 +1,10 @@
 package com.jsowell.netty.domain.ebike.deviceupload;
 
 import com.jsowell.netty.domain.ebike.AbsEBikeMessage;
-import lombok.Data;
 
 /**
  * 设备注册包（20指令）
  */
-@Data
 public class EBikeMessageCmd20 extends AbsEBikeMessage {
 
     private DeviceRegister deviceRegister;
diff --git a/jsowell-netty/src/main/java/com/jsowell/netty/domain/ebike/deviceupload/EBikeMessageCmd21.java b/jsowell-netty/src/main/java/com/jsowell/netty/domain/ebike/deviceupload/EBikeMessageCmd21.java
new file mode 100644
index 000000000..35623a779
--- /dev/null
+++ b/jsowell-netty/src/main/java/com/jsowell/netty/domain/ebike/deviceupload/EBikeMessageCmd21.java
@@ -0,0 +1,26 @@
+package com.jsowell.netty.domain.ebike.deviceupload;
+
+import com.jsowell.netty.domain.ebike.AbsEBikeMessage;
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * 设备注册包（20指令）
+ */
+@Getter
+@Setter
+public class EBikeMessageCmd21 extends AbsEBikeMessage {
+
+    private DeviceHeartbeat deviceHeartbeat;
+
+    public EBikeMessageCmd21(String header, int length, int physicalId, int messageId, String command, Object payload, int checksum, DeviceHeartbeat deviceHeartbeat) {
+        super(header, length, physicalId, messageId, command, payload, checksum);
+        this.deviceHeartbeat = deviceHeartbeat;
+    }
+
+    @Override
+    public void parsePayload(byte[] dataBytes) {
+        this.deviceHeartbeat = new DeviceHeartbeat(dataBytes);
+    }
+
+}
\ No newline at end of file