diff --git a/java_console/autotest/src/main/java/com/rusefi/autotest/ControllerConnectorState.java b/java_console/autotest/src/main/java/com/rusefi/autotest/ControllerConnectorState.java
index 1e7bf9b35d..b9ddcd1831 100644
--- a/java_console/autotest/src/main/java/com/rusefi/autotest/ControllerConnectorState.java
+++ b/java_console/autotest/src/main/java/com/rusefi/autotest/ControllerConnectorState.java
@@ -37,7 +37,7 @@ public class ControllerConnectorState {
         FileLog.MAIN.start();
         String port = System.getProperty("ecu.port");
         if (port == null) {
-            port = PortDetector.autoDetectSerial(null);
+            port = PortDetector.autoDetectSerial(null).getSerialPort();
             if (port == null)
                 throw new IllegalStateException("ECU serial not detected");
         }
diff --git a/java_console/io/src/main/java/com/rusefi/autodetect/PortDetector.java b/java_console/io/src/main/java/com/rusefi/autodetect/PortDetector.java
index 0a9fc9d209..4098d7124f 100644
--- a/java_console/io/src/main/java/com/rusefi/autodetect/PortDetector.java
+++ b/java_console/io/src/main/java/com/rusefi/autodetect/PortDetector.java
@@ -29,19 +29,24 @@ public class PortDetector {
      * @return port name on which rusEFI was detected or null if none
      */
     @Nullable
-    public static String autoDetectSerial(Function<IoStream, Void> callback) {
+    public static SerialAutoChecker.AutoDetectResult autoDetectSerial(Function<IoStream, Void> callback) {
         String rusEfiAddress = System.getProperty("rusefi.address");
-        if (rusEfiAddress != null)
-            return rusEfiAddress;
+        if (rusEfiAddress != null) {
+            return getSignatureFromPorts(callback, new String[] {rusEfiAddress});
+        }
         String[] serialPorts = getPortNames();
         if (serialPorts.length == 0) {
             log.error("No serial ports detected");
-            return null;
+            return new SerialAutoChecker.AutoDetectResult(null, null);
         }
         log.info("Trying " + Arrays.toString(serialPorts));
+        return getSignatureFromPorts(callback, serialPorts);
+    }
+
+    private static SerialAutoChecker.AutoDetectResult getSignatureFromPorts(Function<IoStream, Void> callback, String[] serialPorts) {
         List<Thread> serialFinder = new ArrayList<>();
         CountDownLatch portFound = new CountDownLatch(1);
-        AtomicReference<String> result = new AtomicReference<>();
+        AtomicReference<SerialAutoChecker.AutoDetectResult> result = new AtomicReference<>();
         for (String serialPort : serialPorts) {
             Thread thread = AUTO_DETECT_PORT.newThread(new SerialAutoChecker(serialPort, portFound, result, callback));
             serialFinder.add(thread);
@@ -67,9 +72,9 @@ public class PortDetector {
     }
 
     @Nullable
-    public static String autoDetectPort(JFrame parent) {
-        String autoDetectedPort = autoDetectSerial(null);
-        if (autoDetectedPort == null) {
+    public static SerialAutoChecker.AutoDetectResult autoDetectPort(JFrame parent) {
+        SerialAutoChecker.AutoDetectResult autoDetectedPort = autoDetectSerial(null);
+        if (autoDetectedPort.getSerialPort() == null) {
             JOptionPane.showMessageDialog(parent, "Failed to located device");
             return null;
         }
@@ -79,7 +84,7 @@ public class PortDetector {
     public static String autoDetectSerialIfNeeded(String port) {
         if (!isAutoPort(port))
             return port;
-        return autoDetectSerial(null);
+        return autoDetectSerial(null).getSerialPort();
     }
 
     public static boolean isAutoPort(String port) {
diff --git a/java_console/io/src/main/java/com/rusefi/autodetect/SerialAutoChecker.java b/java_console/io/src/main/java/com/rusefi/autodetect/SerialAutoChecker.java
index 9345881b15..77db59e4f7 100644
--- a/java_console/io/src/main/java/com/rusefi/autodetect/SerialAutoChecker.java
+++ b/java_console/io/src/main/java/com/rusefi/autodetect/SerialAutoChecker.java
@@ -6,6 +6,7 @@ import com.rusefi.config.generated.Fields;
 import com.rusefi.io.IoStream;
 import com.rusefi.io.commands.HelloCommand;
 import com.rusefi.io.serial.SerialIoStreamJSerialComm;
+import org.jetbrains.annotations.Nullable;
 
 import java.io.IOException;
 import java.util.concurrent.CountDownLatch;
@@ -18,18 +19,18 @@ public class SerialAutoChecker implements Runnable {
     private final static Logging log = Logging.getLogging(SerialAutoChecker.class);
     private final String serialPort;
     private final CountDownLatch portFound;
-    private final AtomicReference<String> result;
+    private final AtomicReference<AutoDetectResult> result;
+    @Nullable
     private final Function<IoStream, Void> callback;
-    public static String SIGNATURE;
 
-    public SerialAutoChecker(String serialPort, CountDownLatch portFound, AtomicReference<String> result, Function<IoStream, Void> callback) {
+    public SerialAutoChecker(String serialPort, CountDownLatch portFound, AtomicReference<AutoDetectResult> result, Function<IoStream, Void> callback) {
         this.serialPort = serialPort;
         this.portFound = portFound;
         this.result = result;
         this.callback = callback;
     }
 
-    public SerialAutoChecker(String serialPort, CountDownLatch portFound, AtomicReference<String> result) {
+    public SerialAutoChecker(String serialPort, CountDownLatch portFound, AtomicReference<AutoDetectResult> result) {
         this(serialPort, portFound, result, null);
     }
 
@@ -38,13 +39,13 @@ public class SerialAutoChecker implements Runnable {
         IoStream stream = SerialIoStreamJSerialComm.openPort(serialPort);
         IncomingDataBuffer incomingData = stream.getDataBuffer();
         boolean isPortFound = false;
+        String signature;
         try {
             HelloCommand.send(stream);
-            byte[] response = incomingData.getPacket("");
+            byte[] response = incomingData.getPacket("auto detect");
             if (!checkResponseCode(response, (byte) Fields.TS_RESPONSE_OK))
                 return;
-            String signature = new String(response, 1, response.length - 1);
-            SIGNATURE = signature;
+            signature = new String(response, 1, response.length - 1);
             log.info("Got signature=" + signature + " from " + serialPort);
             if (signature.startsWith(Fields.PROTOCOL_SIGNATURE_PREFIX)) {
                 if (callback != null) {
@@ -61,8 +62,27 @@ public class SerialAutoChecker implements Runnable {
             /**
              * propagating result after closing the port so that it could be used right away
              */
-            result.set(serialPort);
+            result.set(new AutoDetectResult(serialPort, signature));
             portFound.countDown();
         }
     }
+
+    public static class AutoDetectResult {
+
+        private final String serialPort;
+        private final String signature;
+
+        public AutoDetectResult(String serialPort, String signature) {
+            this.serialPort = serialPort;
+            this.signature = signature;
+        }
+
+        public String getSerialPort() {
+            return serialPort;
+        }
+
+        public String getSignature() {
+            return signature;
+        }
+    }
 }
diff --git a/java_console/io/src/main/java/com/rusefi/binaryprotocol/BinaryProtocol.java b/java_console/io/src/main/java/com/rusefi/binaryprotocol/BinaryProtocol.java
index 3c0161475b..61a4f57262 100644
--- a/java_console/io/src/main/java/com/rusefi/binaryprotocol/BinaryProtocol.java
+++ b/java_console/io/src/main/java/com/rusefi/binaryprotocol/BinaryProtocol.java
@@ -220,6 +220,11 @@ public class BinaryProtocol {
         linkManager.getCommandQueue().handleConfirmationMessage(CommandQueue.CONFIRMATION_PREFIX + command);
     }
 
+    public String getSignature() throws IOException {
+        HelloCommand.send(stream);
+        return HelloCommand.getHelloResponse(incomingData);
+    }
+
     /**
      * this method reads configuration snapshot from controller
      *
@@ -227,8 +232,7 @@ public class BinaryProtocol {
      */
     public boolean connectAndReadConfiguration(DataListener listener) {
         try {
-            HelloCommand.send(stream);
-            signature = HelloCommand.getHelloResponse(incomingData);
+            signature = getSignature();
             System.out.println("Got " + signature);
             SignatureHelper.downloadIfNotAvailable(SignatureHelper.getUrl(signature));
         } catch (IOException e) {
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 e981f93d5c..d8bbe8e6d0 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
@@ -7,6 +7,12 @@ import java.io.IOException;
 
 public class DfuHelper {
     public static void sendDfuRebootCommand(IoStream stream, StringBuilder messages) {
+
+
+
+        if (1==1)
+            return;
+
         byte[] command = BinaryProtocol.getTextCommandBytes(Fields.CMD_REBOOT_DFU);
         try {
             stream.sendPacket(command);
diff --git a/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java b/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java
index 9b3c9f58ca..aa86231ac5 100644
--- a/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java
+++ b/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java
@@ -6,7 +6,7 @@ import java.net.URL;
 import java.util.concurrent.atomic.AtomicReference;
 
 public class rusEFIVersion {
-    public static final int CONSOLE_VERSION = 20210918;
+    public static final int CONSOLE_VERSION = 20210920;
     public static AtomicReference<String> firmwareVersion = new AtomicReference<>("N/A");
 
     public static long classBuildTimeMillis() {
diff --git a/java_console/ui/src/main/java/com/rusefi/StartupFrame.java b/java_console/ui/src/main/java/com/rusefi/StartupFrame.java
index 12fa8fa993..5beef6ec49 100644
--- a/java_console/ui/src/main/java/com/rusefi/StartupFrame.java
+++ b/java_console/ui/src/main/java/com/rusefi/StartupFrame.java
@@ -238,7 +238,7 @@ public class StartupFrame {
         BaudRateHolder.INSTANCE.baudRate = Integer.parseInt((String) comboSpeeds.getSelectedItem());
         String selectedPort = comboPorts.getSelectedItem().toString();
         if (SerialPortScanner.AUTO_SERIAL.equals(selectedPort)) {
-            String autoDetectedPort = PortDetector.autoDetectPort(StartupFrame.this.frame);
+            String autoDetectedPort = PortDetector.autoDetectPort(StartupFrame.this.frame).getSerialPort();
             if (autoDetectedPort == null)
                 return;
             selectedPort = autoDetectedPort;
diff --git a/java_console/ui/src/main/java/com/rusefi/autodetect/PortDetectorSandbox.java b/java_console/ui/src/main/java/com/rusefi/autodetect/PortDetectorSandbox.java
index c1fd6ee8b1..cf5bd2ef80 100644
--- a/java_console/ui/src/main/java/com/rusefi/autodetect/PortDetectorSandbox.java
+++ b/java_console/ui/src/main/java/com/rusefi/autodetect/PortDetectorSandbox.java
@@ -5,7 +5,7 @@ import com.rusefi.IoUtil;
 public class PortDetectorSandbox {
     public static void main(String[] args) {
         while (true) {
-            String port = PortDetector.autoDetectSerial(null);
+            String port = PortDetector.autoDetectSerial(null).getSerialPort();
             System.out.println("Detected " + port);
 
             IoUtil.sleepSeconds(1);
diff --git a/java_console/ui/src/main/java/com/rusefi/maintenance/DfuFlasher.java b/java_console/ui/src/main/java/com/rusefi/maintenance/DfuFlasher.java
index 611b1c570d..293b7a6498 100644
--- a/java_console/ui/src/main/java/com/rusefi/maintenance/DfuFlasher.java
+++ b/java_console/ui/src/main/java/com/rusefi/maintenance/DfuFlasher.java
@@ -62,7 +62,7 @@ public class DfuFlasher {
             port = PortDetector.autoDetectSerial(stream -> {
                 DfuHelper.sendDfuRebootCommand(stream, messages);
                 return null;
-            });
+            }).getSerialPort();
             if (port == null) {
                 JOptionPane.showMessageDialog(ConsoleUI.getFrame(), "rusEFI serial port not detected");
                 return;
diff --git a/java_console/ui/src/main/java/com/rusefi/tools/ConsoleTools.java b/java_console/ui/src/main/java/com/rusefi/tools/ConsoleTools.java
index 45141c567d..dffbd76c7c 100644
--- a/java_console/ui/src/main/java/com/rusefi/tools/ConsoleTools.java
+++ b/java_console/ui/src/main/java/com/rusefi/tools/ConsoleTools.java
@@ -239,7 +239,7 @@ public class ConsoleTools {
 
     public static void startAndConnect(final Function<LinkManager, Void> onConnectionEstablished) {
 
-        String autoDetectedPort = PortDetector.autoDetectSerial(null);
+        String autoDetectedPort = PortDetector.autoDetectSerial(null).getSerialPort();
         if (autoDetectedPort == null) {
             System.err.println(RUS_EFI_NOT_DETECTED);
             return;
@@ -342,7 +342,7 @@ public class ConsoleTools {
 
     @Nullable
     private static String autoDetectPort() {
-        String autoDetectedPort = PortDetector.autoDetectSerial(null);
+        String autoDetectedPort = PortDetector.autoDetectSerial(null).getSerialPort();
         if (autoDetectedPort == null) {
             System.err.println(RUS_EFI_NOT_DETECTED);
             return null;
@@ -367,7 +367,8 @@ public class ConsoleTools {
     }
 
     static void detect(String[] strings) throws IOException {
-        String autoDetectedPort = autoDetectPort();
+        SerialAutoChecker.AutoDetectResult detectResult = PortDetector.autoDetectSerial(null);
+        String autoDetectedPort = detectResult.getSerialPort();
         if (autoDetectedPort == null) {
             System.out.println(RUS_EFI_NOT_DETECTED);
             return;
@@ -413,9 +414,9 @@ public class ConsoleTools {
         });
         responseBuffer.append(textResponse + "\r\n", LinkManager.ENCODER);
 
-        System.out.println("Signature: " + SerialAutoChecker.SIGNATURE);
+        System.out.println("Signature: " + detectResult.getSignature());
         System.out.println("It says " + messages);
-        Pair<String, String> stringPair = SignatureHelper.getUrl(SerialAutoChecker.SIGNATURE);
+        Pair<String, String> stringPair = SignatureHelper.getUrl(detectResult.getSignature());
         if (stringPair != null)
             System.out.println("Ini file: " + stringPair.first);
         System.exit(0);
diff --git a/java_console/ui/src/main/java/com/rusefi/tools/NetworkConnectorStartup.java b/java_console/ui/src/main/java/com/rusefi/tools/NetworkConnectorStartup.java
index 97782b7494..c605222197 100644
--- a/java_console/ui/src/main/java/com/rusefi/tools/NetworkConnectorStartup.java
+++ b/java_console/ui/src/main/java/com/rusefi/tools/NetworkConnectorStartup.java
@@ -21,7 +21,7 @@ public class NetworkConnectorStartup {
             return;
         }
 
-        String autoDetectedPort = PortDetector.autoDetectSerial(null);
+        String autoDetectedPort = PortDetector.autoDetectSerial(null).getSerialPort();
         if (autoDetectedPort == null) {
             System.err.println(ConsoleTools.RUS_EFI_NOT_DETECTED);
             return;
diff --git a/java_console/ui/src/main/java/com/rusefi/ui/light/LightweightGUI.java b/java_console/ui/src/main/java/com/rusefi/ui/light/LightweightGUI.java
index 94c29e0421..4f50599443 100644
--- a/java_console/ui/src/main/java/com/rusefi/ui/light/LightweightGUI.java
+++ b/java_console/ui/src/main/java/com/rusefi/ui/light/LightweightGUI.java
@@ -113,7 +113,7 @@ public class LightweightGUI {
 
     private static String detectPortUntilDetected() {
         while (true) {
-            String port = PortDetector.autoDetectSerial(null);
+            String port = PortDetector.autoDetectSerial(null).getSerialPort();
             System.out.println("Detected " + port);
             if (port != null)
                 return port;