diff --git a/java_console/io/src/main/java/com/rusefi/io/DfuHelper.java b/java_console/io/src/main/java/com/rusefi/io/DfuHelper.java
index 785a68f815..3b987eec82 100644
--- a/java_console/io/src/main/java/com/rusefi/io/DfuHelper.java
+++ b/java_console/io/src/main/java/com/rusefi/io/DfuHelper.java
@@ -21,7 +21,7 @@ public class DfuHelper {
         try {
             stream.sendPacket(command);
             stream.close();
-            messages.append("Reboot command sent!\n");
+            messages.append(String.format("Reboot command [%s] sent into %s!\n", Fields.CMD_REBOOT_DFU, stream));
         } catch (IOException e) {
             messages.append("Error " + e);
         }
diff --git a/java_console/io/src/main/java/com/rusefi/io/serial/SerialIoStreamJSerialComm.java b/java_console/io/src/main/java/com/rusefi/io/serial/SerialIoStreamJSerialComm.java
index 1eaf662f99..f6ba8cbab3 100644
--- a/java_console/io/src/main/java/com/rusefi/io/serial/SerialIoStreamJSerialComm.java
+++ b/java_console/io/src/main/java/com/rusefi/io/serial/SerialIoStreamJSerialComm.java
@@ -18,7 +18,7 @@ import static com.devexperts.logging.Logging.getLogging;
  */
 public class SerialIoStreamJSerialComm extends AbstractIoStream {
     private static final Logging log = getLogging(SerialIoStreamJSerialComm.class);
-    private SerialPort sp;
+    private final SerialPort sp;
     private final String port;
     private final IncomingDataBuffer dataBuffer;
 
@@ -99,4 +99,9 @@ public class SerialIoStreamJSerialComm extends AbstractIoStream {
 //        FileLog.LOGGER.info("[SerialIoStreamJSerialComm] opened " + port);
         return new SerialIoStreamJSerialComm(serialPort, port);
     }
+
+    @Override
+    public String toString() {
+        return port + " " + super.toString();
+    }
 }