diff --git a/app/src/main/java/eu/droogers/smsmatrix/MainActivity.java b/app/src/main/java/eu/droogers/smsmatrix/MainActivity.java
index e38cadf..e23c76b 100644
--- a/app/src/main/java/eu/droogers/smsmatrix/MainActivity.java
+++ b/app/src/main/java/eu/droogers/smsmatrix/MainActivity.java
@@ -1,9 +1,11 @@
 package eu.droogers.smsmatrix;
 
+import android.Manifest;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
@@ -20,11 +22,14 @@ public class MainActivity extends Activity {
     private EditText username;
     private EditText device;
     private EditText hsUrl;
+    private EditText syncDelay;
+    private EditText syncTimeout;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+        checkPermissions();
 
         sp = getSharedPreferences("settings", Context.MODE_PRIVATE);
         botUsername = (EditText) findViewById(R.id.editText_botUsername);
@@ -32,24 +37,31 @@ public class MainActivity extends Activity {
         username = (EditText) findViewById(R.id.editText_username);
         device = (EditText) findViewById(R.id.editText_device);
         hsUrl = (EditText) findViewById(R.id.editText_hsUrl);
+        syncDelay = (EditText) findViewById(R.id.editText_syncDelay);
+        syncTimeout = (EditText) findViewById(R.id.editText_syncTimeout);
 
         botUsername.setText(sp.getString("botUsername", ""));
         botPassword.setText(sp.getString("botPassword", ""));
         username.setText(sp.getString("username", ""));
         device.setText(sp.getString("device", ""));
         hsUrl.setText(sp.getString("hsUrl", ""));
+        syncDelay.setText(sp.getString("syncDelay", ""));
+        syncTimeout.setText(sp.getString("syncTimeout", ""));
 
 
         Button saveButton = (Button) findViewById(R.id.button_save);
         saveButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
+                checkPermissions();
                 SharedPreferences.Editor editor = sp.edit();
                 editor.putString("botUsername", botUsername.getText().toString());
                 editor.putString("botPassword", botPassword.getText().toString());
                 editor.putString("username", username.getText().toString());
                 editor.putString("device", device.getText().toString());
                 editor.putString("hsUrl", hsUrl.getText().toString());
+                editor.putString("syncDelay", syncDelay.getText().toString());
+                editor.putString("syncTimeout", syncTimeout.getText().toString());
                 editor.apply();
 
                 Log.e(TAG, "onClick: " + botUsername.getText().toString() );
@@ -59,6 +71,20 @@ public class MainActivity extends Activity {
         startService();
     }
 
+    private void checkPermissions() {
+        askPermission(Manifest.permission.SEND_SMS);
+        askPermission(Manifest.permission.READ_PHONE_STATE);
+        askPermission(Manifest.permission.READ_CONTACTS);
+        askPermission(Manifest.permission.READ_EXTERNAL_STORAGE);
+
+    }
+
+    private void askPermission(String permission) {
+        if (getApplicationContext().checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
+            this.requestPermissions(new String[]{permission},1);
+        }
+    }
+
     private void startService() {
         Intent intent = new Intent(this, MatrixService.class);
         startService(intent);
diff --git a/app/src/main/java/eu/droogers/smsmatrix/Matrix.java b/app/src/main/java/eu/droogers/smsmatrix/Matrix.java
index 4e5b6ea..e7c252b 100644
--- a/app/src/main/java/eu/droogers/smsmatrix/Matrix.java
+++ b/app/src/main/java/eu/droogers/smsmatrix/Matrix.java
@@ -41,6 +41,8 @@ import static android.content.ContentValues.TAG;
  */
 
 public class Matrix {
+    private final int syncDelay;
+    private final int syncTimeout;
     HomeServerConnectionConfig hsConfig;
     Context context;
     MXSession session;
@@ -56,7 +58,7 @@ public class Matrix {
 
     private String realUserid;
 
-    public Matrix (final Context context, String url, String botUsername, String botPassword, String username, String device) {
+    public Matrix(final Context context, String url, String botUsername, String botPassword, String username, String device, String syncDelay, String syncTimeout) {
         this.context = context;
         hsConfig = new HomeServerConnectionConfig(Uri.parse(url));
 
@@ -64,6 +66,8 @@ public class Matrix {
         deviceName = device;
         this.botUsername = botUsername;
         botHSUrl = url;
+        this.syncDelay = Integer.parseInt(syncDelay);
+        this.syncTimeout = Integer.parseInt(syncTimeout);
 
         login(botUsername, botPassword);
     }
@@ -99,8 +103,8 @@ public class Matrix {
 //        NetworkConnectivityReceiver nwMan = new NetworkConnectivityReceiver();
 
         session = new MXSession(hsConfig, dh, context);
-        session.setSyncDelay(12000);
-        session.setSyncTimeout(30*60*1000);
+        session.setSyncDelay(syncDelay * 1000);
+        session.setSyncTimeout(syncTimeout * 60 * 1000);
         Log.e(TAG, "onLogin:" + session.getSyncTimeout());
 
 
diff --git a/app/src/main/java/eu/droogers/smsmatrix/MatrixService.java b/app/src/main/java/eu/droogers/smsmatrix/MatrixService.java
index cc1b111..1e29f60 100644
--- a/app/src/main/java/eu/droogers/smsmatrix/MatrixService.java
+++ b/app/src/main/java/eu/droogers/smsmatrix/MatrixService.java
@@ -21,6 +21,8 @@ public class MatrixService extends Service {
     private String username;
     private String device;
     private String hsUrl;
+    private String syncDelay;
+    private String syncTimeout;
 
     @Override
     public void onCreate() {
@@ -35,9 +37,11 @@ public class MatrixService extends Service {
         username = sp.getString("username", "");
         device = sp.getString("device", "");
         hsUrl = sp.getString("hsUrl", "");
+        syncDelay = sp.getString("syncDelay", "");
+        syncTimeout = sp.getString("syncTimeout", "");
 
-        if (mx == null && !botUsername.isEmpty() && !botPassword.isEmpty() && !username.isEmpty() && !device.isEmpty() && !hsUrl.isEmpty()) {
-            mx = new Matrix(getApplication(), hsUrl, botUsername, botPassword, username, device);
+        if (mx == null && !botUsername.isEmpty() && !botPassword.isEmpty() && !username.isEmpty() && !device.isEmpty() && !hsUrl.isEmpty() && !syncDelay.isEmpty() && !syncTimeout.isEmpty()) {
+            mx = new Matrix(getApplication(), hsUrl, botUsername, botPassword, username, device, syncDelay, syncTimeout);
             Log.e(TAG, "onStartCommand222: " + hsUrl );
             Toast.makeText(this, "service starting:", Toast.LENGTH_SHORT).show();
         }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 4830c46..b386f52 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -100,6 +100,40 @@
         android:hint="Sms_mobiel"
         android:inputType="textPersonName" />
 
+    <TextView
+        android:id="@+id/textView_syncDelay"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:text="SyncDelay in seconds"
+        android:textStyle="bold" />
+
+    <EditText
+        android:id="@+id/editText_syncDelay"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:ems="10"
+        android:hint="12"
+        android:inputType="number" />
+
+    <TextView
+        android:id="@+id/textView_syncTimeout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:text="SyncTimeout in minutes"
+        android:textStyle="bold" />
+
+    <EditText
+        android:id="@+id/editText_syncTimeout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:ems="10"
+        android:hint="30"
+        android:inputType="number" />
+
     <Button
         android:id="@+id/button_save"
         android:layout_width="match_parent"