diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index ecce9af..7e7bcec 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -73,6 +73,8 @@ dependencies {
     implementation("io.github.scwang90:refresh-header-classics:3.0.0-alpha")
     implementation("io.github.scwang90:refresh-footer-classics:3.0.0-alpha")
 
+    implementation("org.greenrobot:eventbus:3.3.1")
+
 //    implementation("io.github.jeremyliao:live-event-bus-x:1.8.0")
 //    implementation("com.hoho:android-usb-serial:1.3.0")
 //    implementation("io.github.jeadyx:jserialport:1.5")
diff --git a/app/src/main/java/com/shuwei/intelligent/shelves/HomeActivity.kt b/app/src/main/java/com/shuwei/intelligent/shelves/HomeActivity.kt
index 48c079b..f5d0007 100644
--- a/app/src/main/java/com/shuwei/intelligent/shelves/HomeActivity.kt
+++ b/app/src/main/java/com/shuwei/intelligent/shelves/HomeActivity.kt
@@ -13,14 +13,17 @@ import androidx.activity.viewModels
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.repeatOnLifecycle
+import androidx.localbroadcastmanager.content.LocalBroadcastManager
 import androidx.recyclerview.widget.DefaultItemAnimator
 import androidx.recyclerview.widget.GridLayoutManager
 import com.chad.library.adapter4.util.setOnDebouncedItemClick
 import com.shuwei.intelligent.shelves.adapter.ShelfAdapter
 import com.shuwei.intelligent.shelves.base.BaseActivity
 import com.shuwei.intelligent.shelves.databinding.ActivityHomeBinding
+import com.shuwei.intelligent.shelves.model.SendWeightEvent
 import com.shuwei.intelligent.shelves.model.ShelfModel
 import com.shuwei.intelligent.shelves.model.ShelfResult
+import com.shuwei.intelligent.shelves.model.WeightEvent
 import com.shuwei.intelligent.shelves.net.Loading
 import com.shuwei.intelligent.shelves.net.NetViewModel
 import com.shuwei.intelligent.shelves.net.RespData
@@ -36,6 +39,9 @@ import com.shuwei.intelligent.shelves.utils.hexToBinary
 import com.shuwei.intelligent.shelves.utils.hexToDec
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
+import org.greenrobot.eventbus.EventBus
+import org.greenrobot.eventbus.Subscribe
+import org.greenrobot.eventbus.ThreadMode
 import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
@@ -65,18 +71,21 @@ class HomeActivity : BaseActivity() {
         const val DEVICE_INFO_CMD = "${HEADER}0301000000000000000000000000${FOOTER}"
 
         val list: MutableList<ShelfModel> = mutableListOf()
+        val weightArray = SparseArray<Double?>()
+        var shelfIndex = 0
+//        public fun getRealWeight():Double = weightArray[shelfIndex]?:0.0
     }
 
     private lateinit var binding: ActivityHomeBinding
 
     private val viewModel: NetViewModel by viewModels()
 
-    private val weightArray by lazy { SparseArray<Double?>() }
 
     @SuppressLint("NotifyDataSetChanged", "HardwareIds")
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         binding = ActivityHomeBinding.inflate(layoutInflater)
+        EventBus.getDefault().register(this)
         setContentView(binding.root)
 
         updateLeftStatus("1-1冷藏柜  -°C / -%")
@@ -316,12 +325,20 @@ class HomeActivity : BaseActivity() {
                     it.weight = realWeightDouble
                     val pos = list.indexOf(it)
                     shelfAdapter.notifyItemChanged(pos)
+                    Log.d(TAG, "getWeightInfo: deviceNo=${it.deviceNo},realWeight=${realWeight}")
+                    EventBus.getDefault().post(SendWeightEvent(it.deviceNo, realWeight))
                 }
             }
 
             count += 8
             index++
         }
+//        ShelfActivity.updateWeight(getRealWeight())
+//        if (list.isNotEmpty()) {
+//            val intent = Intent(ShelfActivity.RECEIVER_DEVICE_INFO + list[shelfIndex].deviceNo)
+//            intent.putExtra(ShelfActivity.SHELF_WEIGHT, weightArray[shelfIndex])
+//            LocalBroadcastManager.getInstance(this).sendBroadcast(intent)
+//        }
     }
 
     private fun getDeviceInfo(data: String) {
@@ -343,21 +360,14 @@ class HomeActivity : BaseActivity() {
             end = temperatureStartIndex,
             data = data
         )
-
-        if (list.isNotEmpty()) {
-            val intent = Intent(ShelfActivity.RECEIVER_DEVICE_INFO + list[shelfIndex].deviceNo)
-            intent.putExtra(ShelfActivity.SHELF_WEIGHT, weightArray[shelfIndex])
-            sendBroadcast(intent)
-        }
     }
 
-    private var shelfIndex = 0
-
     override fun onDestroy() {
         lifecycleScope.launch {
             SerialPortManager.close()
         }
         TaskManager.cancelTask()
+        EventBus.getDefault().unregister(this)
         super.onDestroy()
     }
 
@@ -365,7 +375,7 @@ class HomeActivity : BaseActivity() {
     private val shelfAdapter by lazy {
         ShelfAdapter(list).apply {
             setOnDebouncedItemClick { adapter, view, position ->
-                this@HomeActivity.shelfIndex = position
+                shelfIndex = position
                 lifecycleScope.launch {
                     val openCmd = if (list[position].deviceNo in 1..5)
                         LEFT_SHELF_OPEN_CMD
@@ -449,4 +459,9 @@ class HomeActivity : BaseActivity() {
             it.tvEmptyContent.setTextColor(Color.WHITE)
         }
     }
+
+    @Subscribe(threadMode = ThreadMode.MAIN)
+    public fun weightEvent(event: WeightEvent) {
+
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/shuwei/intelligent/shelves/ShelfActivity.kt b/app/src/main/java/com/shuwei/intelligent/shelves/ShelfActivity.kt
index d0c74b3..c3e5c5e 100644
--- a/app/src/main/java/com/shuwei/intelligent/shelves/ShelfActivity.kt
+++ b/app/src/main/java/com/shuwei/intelligent/shelves/ShelfActivity.kt
@@ -9,7 +9,10 @@ import android.os.Bundle
 import android.os.Handler
 import android.os.Looper
 import android.util.Log
+import android.widget.LinearLayout
+import android.widget.TextView
 import androidx.activity.viewModels
+import androidx.core.view.updateLayoutParams
 import androidx.core.widget.addTextChangedListener
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.lifecycleScope
@@ -23,21 +26,27 @@ import com.shuwei.intelligent.shelves.base.BaseActivity
 import com.shuwei.intelligent.shelves.databinding.ActivityShelfBinding
 import com.shuwei.intelligent.shelves.model.GoodsModel
 import com.shuwei.intelligent.shelves.model.GoodsRecord
+import com.shuwei.intelligent.shelves.model.SendWeightEvent
 import com.shuwei.intelligent.shelves.model.ShelfModel
 import com.shuwei.intelligent.shelves.net.Loading
 import com.shuwei.intelligent.shelves.net.NetViewModel
 import com.shuwei.intelligent.shelves.net.RespData
 import com.shuwei.intelligent.shelves.net.UiState
 import com.shuwei.intelligent.shelves.serial.SerialPortManager
+import com.shuwei.intelligent.shelves.task.TaskManager
 import com.shuwei.intelligent.shelves.utils.DateTimeUtil
 import com.shuwei.intelligent.shelves.utils.KeyboardUtil
 import com.shuwei.intelligent.shelves.utils.ext.addOnActionSearchListener
 import com.shuwei.intelligent.shelves.utils.ext.clickWithDebounce
+import com.shuwei.intelligent.shelves.utils.ext.dp
 import com.shuwei.intelligent.shelves.utils.ext.gone
 import com.shuwei.intelligent.shelves.utils.ext.toJsonString
 import com.shuwei.intelligent.shelves.utils.ext.toast
 import com.shuwei.intelligent.shelves.utils.ext.visible
 import kotlinx.coroutines.launch
+import org.greenrobot.eventbus.EventBus
+import org.greenrobot.eventbus.Subscribe
+import org.greenrobot.eventbus.ThreadMode
 import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
@@ -55,6 +64,7 @@ class ShelfActivity : BaseActivity() {
         const val SHELF_INDEX = "shelfIndex"
 
         const val PAGE_SIZE = 100
+
     }
 
     private lateinit var binding: ActivityShelfBinding
@@ -65,7 +75,6 @@ class ShelfActivity : BaseActivity() {
 
     private var realWeight: Int = 0
     private var pageNo: Int = 1
-    private var shelfIndex: Int = 0
 
     private val viewModel: NetViewModel by viewModels()
 
@@ -76,13 +85,15 @@ class ShelfActivity : BaseActivity() {
         super.onCreate(savedInstanceState)
         binding = ActivityShelfBinding.inflate(layoutInflater)
         setContentView(binding.root)
-
+        EventBus.getDefault().register(this)
+//        tvFoodWeight =binding.tvFoodWeight
         shelfModel = intent.getSerializableExtra(SHELF_MODEL) as ShelfModel?
 
         shelfModel?.let {
             binding.tvShelfName.text = it.shelfName
             binding.tvFoodName.text = if (it.goodsName.isNullOrBlank()) "-" else it.goodsName
             realWeight = ((it.weight ?: 0.0) * 1000).toInt()
+//            realWeight = (HomeActivity.getRealWeight() * 1000).toInt()
             binding.tvFoodWeight.text = "${realWeight}克"
         }
 
@@ -137,9 +148,11 @@ class ShelfActivity : BaseActivity() {
                 SerialPortManager.send(zeroClearingCmd)
                 //清零
                 realWeight = 0
-                binding.tvFoodWeight.text = "${realWeight}克"
+//                binding.tvFoodWeight.text = "${realWeight}克"
 
                 SerialPortManager.send(DEVICE_INFO_CMD)
+                Loading.show(this@ShelfActivity)
+                v.postDelayed({Loading.dismiss()}, 5000)
             }
             KeyboardUtil.hideKeyboard(v.context, v)
         }
@@ -159,7 +172,7 @@ class ShelfActivity : BaseActivity() {
             }
         }
 
-        registerReceiver(receiver, IntentFilter(RECEIVER_DEVICE_INFO + shelfModel?.deviceNo))
+//        registerReceiver(receiver, IntentFilter(RECEIVER_DEVICE_INFO + shelfModel?.deviceNo))
 
         binding.refreshLayout.let {
             it.setEnableRefresh(true)
@@ -171,6 +184,8 @@ class ShelfActivity : BaseActivity() {
             it.setOnLoadMoreListener { getGoodsList() }
         }
         getGoodsList()
+
+        TaskManager.startDeviceTask()
     }
 
     private fun finishRefresh() {
@@ -239,20 +254,23 @@ class ShelfActivity : BaseActivity() {
         }
     }
 
-    private val receiver = object : BroadcastReceiver() {
-        override fun onReceive(context: Context?, intent: Intent?) {
-            intent?.let {
-//                val data = it.getStringExtra(RECEIVER_DEVICE_INFO)
-                val weight = it.getDoubleExtra(SHELF_WEIGHT, 0.0)
-                Log.d(TAG, "getDeviceInfo:onReceive: weight=$weight")
-                realWeight = (weight * 1000).toInt()
-                binding.tvFoodWeight.text = "${realWeight}克"
-            }
-        }
-    }
+//    private val receiver = object : BroadcastReceiver() {
+//        override fun onReceive(context: Context?, intent: Intent?) {
+//            intent?.let {
+//                if (it.action == RECEIVER_DEVICE_INFO + shelfModel?.deviceNo) {
+//                    val weight = it.getDoubleExtra(SHELF_WEIGHT, 0.0)
+//                    Log.d(TAG, "getDeviceInfo:onReceive: weight=$weight")
+//                    realWeight = (weight * 1000).toInt()
+//                    binding.tvFoodWeight.text = "${realWeight}克"
+//                }
+//            }
+//        }
+//    }
 
     override fun onDestroy() {
-        unregisterReceiver(receiver)
+//        unregisterReceiver(receiver)
+        EventBus.getDefault().unregister(this)
+        TaskManager.cancelDeviceTask()
         super.onDestroy()
     }
 
@@ -315,6 +333,9 @@ class ShelfActivity : BaseActivity() {
                 getGoodsList()
             }
             it.ivEmptyIcon.setImageResource(R.drawable.ic_empty_gray)
+            it.ivEmptyIcon.updateLayoutParams<LinearLayout.LayoutParams> {
+                width = 200.dp
+            }
         }
         binding.refreshLayout.run {
             setEnableRefresh(false)
@@ -322,4 +343,11 @@ class ShelfActivity : BaseActivity() {
         }
     }
 
+    @Subscribe(threadMode = ThreadMode.MAIN)
+    public fun receiveWeightEvent(event: SendWeightEvent) {
+        if (event.shelfNo == (shelfModel?.deviceNo?:0)) {
+            binding.tvFoodWeight.text = "${event.weight}克"
+        }
+    }
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/shuwei/intelligent/shelves/model/SendWeightEvent.kt b/app/src/main/java/com/shuwei/intelligent/shelves/model/SendWeightEvent.kt
new file mode 100644
index 0000000..9c4031d
--- /dev/null
+++ b/app/src/main/java/com/shuwei/intelligent/shelves/model/SendWeightEvent.kt
@@ -0,0 +1,8 @@
+package com.shuwei.intelligent.shelves.model
+
+data class SendWeightEvent(
+    var shelfNo: Int = 0,
+    var weight:Int=0
+)
+
+data class WeightEvent(var weight: Int)
\ No newline at end of file
diff --git a/app/src/main/java/com/shuwei/intelligent/shelves/task/SyncDeviceTask.kt b/app/src/main/java/com/shuwei/intelligent/shelves/task/SyncDeviceTask.kt
new file mode 100644
index 0000000..417dba6
--- /dev/null
+++ b/app/src/main/java/com/shuwei/intelligent/shelves/task/SyncDeviceTask.kt
@@ -0,0 +1,32 @@
+package com.shuwei.intelligent.shelves.task
+
+import android.content.Context
+import android.util.Log
+import androidx.work.CoroutineWorker
+import androidx.work.WorkerParameters
+import com.shuwei.intelligent.shelves.HomeActivity
+import com.shuwei.intelligent.shelves.serial.SerialPortManager
+
+class SyncDeviceTask(appContext: Context, workerParams: WorkerParameters) :
+    CoroutineWorker(appContext, workerParams) {
+
+    companion object {
+        private const val TAG = "SyncDeviceTask"
+    }
+
+    override suspend fun doWork(): Result {
+        return try {
+            // 执行后台任务逻辑
+            Log.d(TAG, "doWork: ----------SyncDeviceTask----------")
+            SerialPortManager.send(HomeActivity.DEVICE_INFO_CMD)
+
+            TaskManager.startDeviceTask()
+
+            Result.success()
+        } catch (e: Exception) {
+            e.printStackTrace()
+            Result.retry()
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/shuwei/intelligent/shelves/task/TaskManager.kt b/app/src/main/java/com/shuwei/intelligent/shelves/task/TaskManager.kt
index 30b35ed..339e7f2 100644
--- a/app/src/main/java/com/shuwei/intelligent/shelves/task/TaskManager.kt
+++ b/app/src/main/java/com/shuwei/intelligent/shelves/task/TaskManager.kt
@@ -8,6 +8,7 @@ import java.util.concurrent.TimeUnit
 
 object TaskManager {
     const val TASK_NAME = "IntelligentShelvesSyncTask"
+    const val DEVICE_TASK_NAME = "IntelligentShelvesDeviceTask"
 
     fun startTask() {
         val nextRequest = OneTimeWorkRequestBuilder<SyncTask>()
@@ -41,4 +42,17 @@ object TaskManager {
             .cancelUniqueWork(TASK_NAME)
     }
 
+    fun startDeviceTask() {
+        val nextRequest = OneTimeWorkRequestBuilder<SyncDeviceTask>()
+            .setInitialDelay(3, TimeUnit.SECONDS)
+            .build()
+        WorkManager.getInstance(App.getInstance())
+            .enqueueUniqueWork(DEVICE_TASK_NAME, ExistingWorkPolicy.REPLACE, nextRequest)
+    }
+
+    fun cancelDeviceTask() {
+        WorkManager.getInstance(App.getInstance())
+            .cancelUniqueWork(DEVICE_TASK_NAME)
+    }
+
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout-sw600dp/activity_home.xml b/app/src/main/res/layout-sw600dp/activity_home.xml
index aadd7c6..51db701 100644
--- a/app/src/main/res/layout-sw600dp/activity_home.xml
+++ b/app/src/main/res/layout-sw600dp/activity_home.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     xmlns:app="http://schemas.android.com/apk/res-auto"
@@ -17,4 +17,11 @@
         android:layout_marginEnd="12dp"
         tools:listitem="@layout/list_item_shelf"/>
 
-</LinearLayout>
\ No newline at end of file
+
+    <include
+        android:id="@+id/include"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        layout="@layout/layout_empty_view"
+        android:visibility="gone"/>
+</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout-sw600dp/activity_shelf.xml b/app/src/main/res/layout-sw600dp/activity_shelf.xml
index 717f97a..1cab528 100644
--- a/app/src/main/res/layout-sw600dp/activity_shelf.xml
+++ b/app/src/main/res/layout-sw600dp/activity_shelf.xml
@@ -156,37 +156,51 @@
                     android:textSize="30sp"
                     tools:ignore="Autofill,HardcodedText,TextFields" />
             </LinearLayout>
-            <com.scwang.smart.refresh.layout.SmartRefreshLayout
-                android:id="@+id/refreshLayout"
+
+            <FrameLayout
                 android:layout_width="match_parent"
-                android:layout_marginTop="24dp"
                 android:layout_height="0dp"
-                android:layout_weight="1">
+                android:layout_weight="1"
+                android:layout_marginTop="24dp">
 
-                <com.scwang.smart.refresh.header.ClassicsHeader
+                <com.scwang.smart.refresh.layout.SmartRefreshLayout
+                    android:id="@+id/refreshLayout"
                     android:layout_width="match_parent"
-                    android:layout_height="wrap_content" />
+                    android:layout_height="match_parent">
 
-                <androidx.recyclerview.widget.RecyclerView
-                    android:id="@+id/rvSearch"
+                    <com.scwang.smart.refresh.header.ClassicsHeader
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content" />
+
+                    <androidx.recyclerview.widget.RecyclerView
+                        android:id="@+id/rvSearch"
+                        android:layout_width="match_parent"
+                        android:layout_height="match_parent"
+                        android:paddingStart="36dp"
+                        android:paddingBottom="12dp"
+                        android:paddingTop="12dp"
+                        android:paddingEnd="36dp"
+                        android:clipToPadding="false"
+                        android:overScrollMode="never"
+                        tools:listitem="@layout/list_item_search"
+                        app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
+                        app:spanCount="2"
+                        tools:itemCount="10"/>
+
+                    <com.scwang.smart.refresh.footer.ClassicsFooter
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content" />
+
+                </com.scwang.smart.refresh.layout.SmartRefreshLayout>
+
+                <include
+                    android:id="@+id/include"
                     android:layout_width="match_parent"
                     android:layout_height="match_parent"
-                    android:paddingStart="36dp"
-                    android:paddingBottom="12dp"
-                    android:paddingTop="12dp"
-                    android:paddingEnd="36dp"
-                    android:clipToPadding="false"
-                    android:overScrollMode="never"
-                    tools:listitem="@layout/list_item_search"
-                    app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
-                    app:spanCount="2"
-                    tools:itemCount="10"/>
+                    layout="@layout/layout_empty_view"
+                    android:visibility="gone"/>
 
-                <com.scwang.smart.refresh.footer.ClassicsFooter
-                    android:layout_width="match_parent"
-                    android:layout_height="wrap_content" />
-
-            </com.scwang.smart.refresh.layout.SmartRefreshLayout>
+            </FrameLayout>
 
 <!--            android:layout_marginTop="48dp"-->
             <com.google.android.material.button.MaterialButton