diff --git a/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt b/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt
index 3f26e53..682815f 100644
--- a/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt
+++ b/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt
@@ -1,6 +1,10 @@
 package xyz.mtfos.btdemo
 
+import android.Manifest
+import android.annotation.SuppressLint
 import android.app.Activity
+import android.content.pm.PackageManager
+import android.os.Build
 import android.os.Bundle
 import android.os.Handler
 import android.widget.Button
@@ -31,6 +35,15 @@ class MainActivity : Activity() {
 
         ble = BLECls(this@MainActivity)
 
+        var permissionCheck: Int = 0
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            permissionCheck += this@MainActivity.checkSelfPermission(android.Manifest.permission.ACCESS_COARSE_LOCATION)
+            permissionCheck += this@MainActivity.checkSelfPermission(android.Manifest.permission.ACCESS_FINE_LOCATION)
+            if (permissionCheck != 0) {
+                requestPermissions(arrayOf(Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION), 111)
+            }
+        }
+
         btn.setOnClickListener {
             val txt: String = intxt.text.toString()
             ble?.sendLongData(txt.toByteArray())
@@ -44,12 +57,16 @@ class MainActivity : Activity() {
         }
     }
 
+    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>?, grantResults: IntArray?) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+    }
+
     override fun onStop() {
         super.onStop()
         disconnect()
     }
 
-    fun scanConnect(){
+    fun scanConnect() {
         if (ble?.init()!!) {
             isInit = true
             ble?.startScan()
@@ -84,5 +101,7 @@ class MainActivity : Activity() {
         }
         disconnectBtn.isEnabled = false
         connectBtn.isEnabled = true
+        btn.isEnabled = false
+        isInit = false
     }
 }
\ No newline at end of file