diff --git a/java_console/io/src/main/java/com/rusefi/io/IoStream.java b/java_console/io/src/main/java/com/rusefi/io/IoStream.java
index d452c4b3d4..02d87479d5 100644
--- a/java_console/io/src/main/java/com/rusefi/io/IoStream.java
+++ b/java_console/io/src/main/java/com/rusefi/io/IoStream.java
@@ -52,8 +52,13 @@ public interface IoStream extends WriteStream, Closeable, StreamStatistics {
         write(packet.getPacket());
         writeInt(packet.getCrc());
         flush();
+        onActivity();
     }
 
+    long latestActivityTime();
+
+    void onActivity();
+
     default void sendPacket(byte[] plainPacket) throws IOException {
         if (plainPacket.length == 0)
             throw new IllegalArgumentException("Empty packets are not valid.");
diff --git a/java_console/io/src/main/java/com/rusefi/io/serial/AbstractIoStream.java b/java_console/io/src/main/java/com/rusefi/io/serial/AbstractIoStream.java
index c5d7f5221f..5175dac748 100644
--- a/java_console/io/src/main/java/com/rusefi/io/serial/AbstractIoStream.java
+++ b/java_console/io/src/main/java/com/rusefi/io/serial/AbstractIoStream.java
@@ -10,6 +10,7 @@ public abstract class AbstractIoStream implements IoStream {
 
     protected StreamStats streamStats = new StreamStats();
     private final AtomicInteger bytesOut = new AtomicInteger();
+    private long latestActivity;
 
     @Override
     public StreamStats getStreamStats() {
@@ -30,6 +31,15 @@ public abstract class AbstractIoStream implements IoStream {
     public void flush() throws IOException {
     }
 
+    @Override
+    public void onActivity() {
+        latestActivity = System.currentTimeMillis();
+    }
+
+    public long latestActivityTime() {
+        return latestActivity;
+    }
+
     @Override
     public boolean isClosed() {
         return isClosed;
@@ -57,6 +67,7 @@ public abstract class AbstractIoStream implements IoStream {
                 maxPacketGap = (int) Math.max(maxPacketGap, now - previousPacketArrivalTime);
             }
             previousPacketArrivalTime = now;
+            AbstractIoStream.this.onActivity();
         }
 
         public void onArrived(int length) {