diff --git a/app/build.gradle b/app/build.gradle
index 1dc9f3d..0e298c2 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -30,6 +30,7 @@ android {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+            signingConfig signingConfigs.debug
         }
     }
     compileOptions {
diff --git a/app/src/main/java/com/example/hpostesting/di/AppModule.kt b/app/src/main/java/com/example/hpostesting/di/AppModule.kt
index 2e46abe..d806a06 100644
--- a/app/src/main/java/com/example/hpostesting/di/AppModule.kt
+++ b/app/src/main/java/com/example/hpostesting/di/AppModule.kt
@@ -38,6 +38,7 @@ import com.example.hpostesting.domain.SaveRawDataTest
 import com.example.hpostesting.firebase.FirebaseManager
 import com.example.hpostesting.presentation.utils.UsbServiceListener
 import com.example.hpostesting.presentation.utils.UsbServiceListenerImpl
+import com.example.hpostesting.util.NetworkMonitor
 import com.example.hpostesting.util.PropertyProvider
 import com.example.hpostesting.util.PropertyProviderImpl
 import com.google.firebase.firestore.FirebaseFirestore
@@ -240,8 +241,11 @@ object AppModule {
         return UsbServiceListenerImpl(context)
     }
 
-
-
+    @Provides
+    @Singleton
+    fun provideNetworkMonitor(@ApplicationContext context: Context): NetworkMonitor {
+        return NetworkMonitor(context)
+    }
 
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/example/hpostesting/util/NetworkChecker.kt b/app/src/main/java/com/example/hpostesting/util/NetworkChecker.kt
new file mode 100644
index 0000000..75d5886
--- /dev/null
+++ b/app/src/main/java/com/example/hpostesting/util/NetworkChecker.kt
@@ -0,0 +1,79 @@
+package com.example.hpostesting.util
+
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.Network
+import android.net.NetworkCapabilities
+import android.net.NetworkRequest
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.launch
+import java.net.HttpURLConnection
+import java.net.URL
+import javax.inject.Inject
+import javax.inject.Singleton
+
+
+@Singleton
+class NetworkMonitor @Inject constructor(
+    @ApplicationContext private val context: Context
+) {
+
+    private val connectivityManager =
+        context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+
+    private val _isConnected = MutableLiveData(false)
+    val isConnected: LiveData<Boolean> get() = _isConnected
+
+    private val networkScope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
+
+    private val networkCallback = object : ConnectivityManager.NetworkCallback() {
+        override fun onAvailable(network: Network) {
+            performPingCheck()
+        }
+        override fun onLost(network: Network) {
+            _isConnected.postValue(false)
+        }
+    }
+
+    fun startMonitoring() {
+        val network = connectivityManager.activeNetwork
+        if (network != null) {
+            performPingCheck()
+        }
+        val networkRequest = NetworkRequest.Builder()
+            .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+            .build()
+
+        connectivityManager.registerNetworkCallback(networkRequest, networkCallback)
+    }
+
+    fun stopMonitoring() {
+        try {
+            connectivityManager.unregisterNetworkCallback(networkCallback)
+        } catch (_: IllegalArgumentException) {
+        }
+        networkScope.cancel()
+    }
+
+    private fun performPingCheck() {
+        networkScope.launch {
+            try {
+                val url = URL("https://www.google.com")
+                val connection = url.openConnection() as HttpURLConnection
+                connection.connectTimeout = 2000
+                connection.connect()
+                val isReachable = connection.responseCode == 200
+                _isConnected.postValue(isReachable)
+                connection.disconnect()
+            } catch (e: Exception) {
+                _isConnected.postValue(false)
+            }
+        }
+    }
+}