diff --git a/apps/counter/api/serializers.py b/apps/counter/api/serializers.py
index 0c7c762..8893dd1 100644
--- a/apps/counter/api/serializers.py
+++ b/apps/counter/api/serializers.py
@@ -1,5 +1,6 @@
 import pytz
 from typing import Optional
+from datetime import datetime, timedelta
 from django.db.models import Q, Min, Max
 from django.core.cache import cache
 from rest_framework import serializers
@@ -194,9 +195,6 @@ class DeviceCountWithInfoSerializer(DeviceCountSerializer):
         return online
 
 
-device_status_map = {'ON': 1, 'OFF': 0}
-
-
 class DeviceInfoSerializer(serializers.ModelSerializer):
     device_name = serializers.SerializerMethodField()
     status = serializers.SerializerMethodField()
@@ -238,9 +236,14 @@ class DeviceInfoSerializer(serializers.ModelSerializer):
         # 区分一代和二代设备
         if obj.chip_type == 'AIR-V2':
             mosq_device_info = MosquitoDeviceInfo.objects.filter(device_id=obj.device_id).first()
-            if mosq_device_info and mosq_device_info.led_status:
+            if mosq_device_info and mosq_device_info.last_connect:
                 self.mosq_device_info = mosq_device_info
-                return device_status_map[mosq_device_info.led_status]
+                now = datetime.now(tz=pytz.timezone('Asia/Shanghai'))
+                dt = now - mosq_device_info.last_connect
+                if dt.seconds > 300:
+                    return 0
+                else:
+                    return 1
 
         return obj.online
 
diff --git a/apps/mosquito/migrations/0032_deviceinfo_last_connect.py b/apps/mosquito/migrations/0032_deviceinfo_last_connect.py
new file mode 100644
index 0000000..0444261
--- /dev/null
+++ b/apps/mosquito/migrations/0032_deviceinfo_last_connect.py
@@ -0,0 +1,18 @@
+# Generated by Django 2.2.4 on 2024-04-01 15:15
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mosquito', '0031_auto_20240326_1106'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='deviceinfo',
+            name='last_connect',
+            field=models.DateTimeField(blank=True, null=True, verbose_name='最近连接时间'),
+        ),
+    ]
diff --git a/apps/mosquito/models.py b/apps/mosquito/models.py
index ff503eb..765c012 100644
--- a/apps/mosquito/models.py
+++ b/apps/mosquito/models.py
@@ -83,6 +83,7 @@ class DeviceInfo(models.Model):
     location = models.CharField(max_length=100, blank=True, null=True, verbose_name='地理位置')
     led_lifetime = models.PositiveIntegerField(default=30000, verbose_name='LED 寿命')
     launch_time = models.DateTimeField(blank=True, null=True, verbose_name='第一次启动时间')
+    last_connect = models.DateTimeField(blank=True, null=True, verbose_name='最近连接时间')
 
     # mqtt 数据
     count = models.PositiveIntegerField(blank=True, null=True, verbose_name='蚊子计数')
diff --git a/apps/mosquito/mqtt_task.py b/apps/mosquito/mqtt_task.py
index a7aef0b..2dcd55a 100644
--- a/apps/mosquito/mqtt_task.py
+++ b/apps/mosquito/mqtt_task.py
@@ -1,6 +1,7 @@
 import os
 import sys
 import json
+import pytz
 import django
 from typing import Dict
 from pathlib import Path
@@ -43,11 +44,20 @@ def on_message(client, userdata, message):
     # 从主题中解析 device_id
     topic_parts = topic.split('/')
     device_id = topic_parts[2]
+    topic_postfix = topic_parts[3]
 
     payload = message.payload.decode('utf-8')
-
-    # update and create
     post_data = json.loads(payload)
+
+    if topic_postfix == 'state':
+        device = DeviceInfo.objects.filter(device_id=device_id).first()
+        if device:
+            ts = post_data['Time Stamp']
+            tz = pytz.timezone("Asia/Shanghai")
+            device.last_connect = tz.localize(datetime.fromtimestamp(ts))
+            device.save()
+            print(f"Device: {device_id} state post success")
+        return
     try:
         update_device_info(device_id, post_data=post_data)
         create_mosq_post(device_id, post_data=post_data)
@@ -165,7 +175,7 @@ client.connect(MQTT_BROKER, MQTT_PORT, 60)
 
 # 订阅所有设备的主题
 client.subscribe(DATA_TOPIC)
-# client.subscribe(STATE_TOPIC)
+client.subscribe(STATE_TOPIC)
 
 # 开始MQTT客户端
 client.loop_forever()