change the type of value of the gervaluerequest to dict

ml/thing.py

@@ -271,7 +271,7 @@ def on_get_value_request(self, msg):
         get_value_reply.fillGetValueReply(
             senderUUID=self.thing_id,
             receiverUUID=[request_sender],
-            results=str(value),
+            results=value,
             msgUUID=reply_msg_uuid,
             replyingToUUID=request_msg_id,
         )