diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index fbe777c..45ed941 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -16,8 +16,6 @@
     <uses-feature android:name="android.hardware.usb.host" />
     <uses-permission android:name="android.permission.USB_PERMISSION" />
 
-    <uses-feature android:name="android.hardware.usb.host" />
-
     <uses-permission android:name="android.permission.USB_PERMISSION" />
 
     <application
diff --git a/app/src/main/java/com/example/hpostesting/presentation/MainActivity.kt b/app/src/main/java/com/example/hpostesting/presentation/MainActivity.kt
index 83f1346..551a784 100644
--- a/app/src/main/java/com/example/hpostesting/presentation/MainActivity.kt
+++ b/app/src/main/java/com/example/hpostesting/presentation/MainActivity.kt
@@ -1,8 +1,11 @@
 package com.example.hpostesting.presentation
 
 import android.Manifest
+import android.app.PendingIntent
 import android.content.*
 import android.content.pm.PackageManager
+import android.hardware.usb.UsbDevice
+import android.hardware.usb.UsbDeviceConnection
 import android.hardware.usb.UsbManager
 import android.location.Location
 import android.os.Bundle
@@ -18,7 +21,9 @@ import com.example.hpostesting.data.DataHolder
 import com.example.hpostesting.data.constant.Constants
 import com.example.hpostesting.data.model.patient.UserData
 import com.example.hpostesting.data.model.test.TestType
+import com.example.hpostesting.presentation.testRight.UsbService
 import com.google.android.gms.location.*
+import com.hoho.android.usbserial.driver.UsbSerialDriver
 import com.hoho.android.usbserial.driver.UsbSerialProber
 import `in`.sminnovations.hpostesting.R
 import `in`.sminnovations.hpostesting.databinding.ActivityMainBinding
@@ -30,14 +35,35 @@ class MainActivity : AppCompatActivity() {
     private val TAG = "MainActivity"
     private lateinit var fusedLocationClient: FusedLocationProviderClient
     private lateinit var locationCallback: LocationCallback
-
+    private var mConnection: UsbDeviceConnection? = null
+    lateinit var mService: UsbService
+    private lateinit var mDriver: UsbSerialDriver
     private val usbReceiver = object : BroadcastReceiver() {
         override fun onReceive(context: Context?, intent: Intent) {
             when (intent.action) {
                 UsbManager.ACTION_USB_DEVICE_DETACHED -> DataHolder.usbConnected.value = false
                 UsbManager.ACTION_USB_DEVICE_ATTACHED -> DataHolder.usbConnected.value = true
             }
+
+
+            synchronized(this) {
+                val device: UsbDevice? = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE)
+
+                if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
+                    device?.apply {
+                        connectUsb(true)
+                    }
+                } else {
+                    onErrorReported("permission denied for device")
+                }
+            }
+
             checkAndUpdateUsbConnection()
+
+
+
+
+
         }
     }
 
@@ -138,6 +164,46 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
+    private fun connectUsb(permissionGranted: Boolean) {
+        Log.d(TAG, "connectUsb() called, permission variable = $permissionGranted")
+        val manager = getSystemService(Context.USB_SERVICE) as UsbManager
+        val availableDrivers = UsbSerialProber.getDefaultProber().findAllDrivers(manager)
+
+        if (availableDrivers.isEmpty()) {
+            onErrorReported("No Device is Connected")
+        } else {
+            mDriver = availableDrivers[0]
+
+            if (mConnection == null) {
+                requestUserPermission(manager, mDriver.device)
+            } else {
+//                setupService()
+            }
+        }
+    }
+
+    private fun requestUserPermission(manager: UsbManager, device: UsbDevice) {
+        val mPendingIntent: PendingIntent
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S) {
+            mPendingIntent = PendingIntent.getBroadcast(
+                this,
+                0,
+                Intent(Constants.ACTION_USB_PERMISSION),
+                PendingIntent.FLAG_MUTABLE
+            )
+        } else {
+            mPendingIntent = PendingIntent.getBroadcast(
+                this,
+                0,
+                Intent(Constants.ACTION_USB_PERMISSION),
+                PendingIntent.FLAG_ONE_SHOT or PendingIntent.FLAG_IMMUTABLE
+            )
+        }
+
+        val filter = IntentFilter(Constants.ACTION_USB_PERMISSION)
+        registerReceiver(usbReceiver, filter)
+        manager.requestPermission(device, mPendingIntent)
+    }
     private fun setupListeners() {
         binding.cvItem1.setOnClickListener {
             DataHolder.selectedTestType = TestType.SICKLECERT
@@ -258,6 +324,14 @@ class MainActivity : AppCompatActivity() {
         stopLocationUpdates()
     }
 
+
+    fun onErrorReported(msg: String) {
+        Toast.makeText(this, msg, Toast.LENGTH_SHORT).show()
+        if (!isFinishing)
+            onBackPressed()
+    }
+
+
     override fun onRequestPermissionsResult(
         requestCode: Int, permissions: Array<String>, grantResults: IntArray
     ) {