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 ff9c903634..e258aa7519 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
@@ -85,6 +85,10 @@ public class BinaryProtocol implements BinaryProtocolCommands {
 
     public static String findCommand(byte command) {
         switch (command) {
+            case Fields.TS_SD_R_COMMAND:
+                return "SD_R_COMMAND";
+            case Fields.TS_SD_W_COMMAND:
+                return "SD_W_COMMAND";
             case Fields.TS_PAGE_COMMAND:
                 return "PAGE";
             case Fields.TS_COMMAND_F:
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 d0b6871763..5b8071ee05 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
@@ -53,6 +53,8 @@ public interface IoStream extends WriteStream, Closeable, StreamStatistics {
     }
 
     default void sendPacket(byte[] plainPacket) throws IOException {
+        if (plainPacket.length == 0)
+            throw new IllegalArgumentException("Empty packets are not valid.");
         byte[] packet;
         if (BinaryProtocol.PLAIN_PROTOCOL) {
             packet = plainPacket;