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 a62e76b523..b84ef533b6 100644
--- a/android/app/src/main/java/com/rusefi/app/rusEFI.java
+++ b/android/app/src/main/java/com/rusefi/app/rusEFI.java
@@ -192,8 +192,10 @@ public class rusEFI extends Activity {
     @SuppressLint("SetTextI18n")
     private void switchToDfu() {
         AndroidSerial serial = AndroidSerial.getAndroidSerial(mStatusView, mResultView, usbManager);
-        if (serial == null)
+        if (serial == null) {
+            // error already reported to mStatusView
             return;
+        }
 
         mResultView.append("Switching to DFU\n");
         DfuHelper.sendDfuRebootCommand(serial, new StringBuilder());
@@ -241,6 +243,7 @@ public class rusEFI extends Activity {
         } else if (view.getId() == R.id.buttonBroadcast) {
             AndroidSerial serial = AndroidSerial.getAndroidSerial(mStatusView, mResultView, usbManager);
             if (serial == null) {
+                // error already reported to mStatusView
                 Snackbar mySnackbar = Snackbar.make(view, "No ECU detected", BaseTransientBottomBar.LENGTH_LONG);
                 mySnackbar.show();
                 return;
diff --git a/android/app/src/main/java/com/rusefi/app/serial/AndroidSerial.java b/android/app/src/main/java/com/rusefi/app/serial/AndroidSerial.java
index 27da852aba..5c9381c6cf 100644
--- a/android/app/src/main/java/com/rusefi/app/serial/AndroidSerial.java
+++ b/android/app/src/main/java/com/rusefi/app/serial/AndroidSerial.java
@@ -1,5 +1,6 @@
 package com.rusefi.app.serial;
 
+import android.annotation.SuppressLint;
 import android.hardware.usb.UsbDeviceConnection;
 import android.hardware.usb.UsbManager;
 import android.widget.TextView;
@@ -40,6 +41,7 @@ public class AndroidSerial extends AbstractIoStream {
         dataBuffer = IncomingDataBuffer.createDataBuffer("", this);
     }
 
+    @SuppressLint("SetTextI18n")
     @Nullable
     public static AndroidSerial getAndroidSerial(TextView mStatusView, TextView mResultView, UsbManager usbManager) {
         List<UsbSerialDriver> availableDrivers = findUsbSerial(usbManager);
@@ -63,7 +65,8 @@ public class AndroidSerial extends AbstractIoStream {
             port.open(connection);
             port.setParameters(115200, 8, UsbSerialPort.STOPBITS_1, UsbSerialPort.PARITY_NONE);
         } catch (IOException e) {
-            throw new IllegalStateException(e);
+            mStatusView.append("Error opening " + e);
+            return null;
         }
 
         return new AndroidSerial(port);