diff --git a/android/app/build.gradle b/android/app/build.gradle
index 9d9786084e..6d775e35c2 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -6,7 +6,7 @@ android {
 
     defaultConfig {
         applicationId "com.rusefi.app"
-        minSdkVersion 17
+        minSdkVersion 21
         targetSdkVersion 30
         versionCode 1
         versionName "1.0"
@@ -22,6 +22,7 @@ android {
 }
 
 dependencies {
+    implementation files('lib/dfu_java.jar')
     implementation 'com.github.mik3y:usb-serial-for-android:v2.2.3'
     implementation fileTree(dir: "libs", include: ["*.jar"])
     implementation 'androidx.appcompat:appcompat:1.1.0'
diff --git a/android/app/lib/dfu_java.jar b/android/app/lib/dfu_java.jar
new file mode 100644
index 0000000000..6414960bf6
Binary files /dev/null and b/android/app/lib/dfu_java.jar differ
diff --git a/android/app/src/main/java/com/rusefi/app/rusEFI.java b/android/app/src/main/java/com/rusefi/app/rusEFI.java
index 021c93ed0f..bc3cbe52ae 100644
--- a/android/app/src/main/java/com/rusefi/app/rusEFI.java
+++ b/android/app/src/main/java/com/rusefi/app/rusEFI.java
@@ -17,8 +17,11 @@
 package com.rusefi.app;
 
 import android.app.Activity;
+import android.app.PendingIntent;
+import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
+import android.content.IntentFilter;
 import android.hardware.usb.UsbDevice;
 import android.hardware.usb.UsbDeviceConnection;
 import android.hardware.usb.UsbManager;
@@ -32,6 +35,7 @@ import com.hoho.android.usbserial.driver.UsbSerialDriver;
 import com.hoho.android.usbserial.driver.UsbSerialPort;
 import com.hoho.android.usbserial.driver.UsbSerialProber;
 import com.hoho.android.usbserial.util.SerialInputOutputManager;
+import com.rusefi.dfu.android.DfuDeviceLocator;
 
 import java.io.IOException;
 import java.util.Date;
@@ -42,27 +46,68 @@ public class rusEFI extends Activity {
     private static final int VENDOR_ST = 0x0483;
     private static final int ST_CDC = 0x5740;
 
+    private static final String ACTION_USB_PERMISSION = "com.android.example.USB_PERMISSION";
+
     /* UI elements */
     private TextView mStatusView;
     private TextView mResultView;
 
+    private UsbManager usbManager;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_usb);
 
+        usbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
+
+
         mStatusView = (TextView) findViewById(R.id.text_status);
         mResultView = (TextView) findViewById(R.id.text_result);
 
+        IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
+        registerReceiver(mUsbReceiver, filter);
 
         mStatusView.setText("Hello");
 
         handleButton();
     }
 
+    private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
+        public void onReceive(Context context, Intent intent) {
+            String action = intent.getAction();
+            if (ACTION_USB_PERMISSION.equals(action)) {
+                synchronized (this) {
+                    if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
+                        UsbDevice dfuDevice = DfuDeviceLocator.findDevice(usbManager);
+                        new DfuDeviceLocator().openDfu(usbManager, dfuDevice);
+//                        if (device != null) {
+//                            //call method to set up device communication
+//                        }
+//                    } else {
+                        //txtInfo.append("permission denied for device " + device);
+                    }
+                }
+            }
+        }
+    };
+
     private void handleButton() {
         mResultView.append("rusEFI app v0.0000001\n");
-        UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
+
+        UsbDevice dfuDevice = DfuDeviceLocator.findDevice(usbManager);
+
+        if (usbManager.hasPermission(dfuDevice)) {
+            new DfuDeviceLocator().openDfu(usbManager, dfuDevice);
+        } else {
+            PendingIntent mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0);
+            usbManager.requestPermission(dfuDevice, mPermissionIntent);
+        }
+
+
+        if (1 == 1)
+            return;
+
 
 //        listDevices(manager);
 
@@ -70,7 +115,7 @@ public class rusEFI extends Activity {
         customTable.addProduct(VENDOR_ST, ST_CDC, CdcAcmSerialDriver.class);
         UsbSerialProber prober = new UsbSerialProber(customTable);
 
-        List<UsbSerialDriver> availableDrivers = prober.findAllDrivers(manager);
+        List<UsbSerialDriver> availableDrivers = prober.findAllDrivers(usbManager);
         if (availableDrivers.isEmpty()) {
             mStatusView.setText("Not connected");
             mResultView.append("No devices " + new Date());
@@ -79,7 +124,7 @@ public class rusEFI extends Activity {
         mStatusView.setText("rusEFI: " + availableDrivers.size() + " device(s)");
 
         UsbSerialDriver driver = availableDrivers.get(0);
-        UsbDeviceConnection connection = manager.openDevice(driver.getDevice());
+        UsbDeviceConnection connection = usbManager.openDevice(driver.getDevice());
         if (connection == null) {
             // add UsbManager.requestPermission(driver.getDevice(), ..) handling here
             mStatusView.setText("Unable to open");