diff --git a/src/src/main/java/com/my/graphiteDigesterBg/diframe/connection/DiConWebsocket.java b/src/src/main/java/com/my/graphiteDigesterBg/diframe/connection/DiConWebsocket.java
index 93b0f86..250b865 100644
--- a/src/src/main/java/com/my/graphiteDigesterBg/diframe/connection/DiConWebsocket.java
+++ b/src/src/main/java/com/my/graphiteDigesterBg/diframe/connection/DiConWebsocket.java
@@ -105,7 +105,13 @@ public class DiConWebsocket implements DiDeviceConnection {
             return ;
         }
 
-        String cmd = DiByteBuffer.toHex(request.parameter);
+        // build cmd from request.parameter
+        request.parameter.rewind();
+        Charset charset = StandardCharsets.UTF_8;
+        CharBuffer charBuffer = charset.decode(request.parameter);
+        String cmd = charBuffer.toString();
+
+//        String cmd = DiByteBuffer.toHex(request.parameter);
         LOG.info("Command (Retry:{}) => {} : [{}]", request.timeoutCount, request.parameterText, cmd);
         cmd = cmd.replace(" ","");
         this.client.send(cmd);