diff --git a/Gaugecontroller/Gaugecontroller.ino b/Gaugecontroller/Gaugecontroller.ino
index a682582..abece38 100644
--- a/Gaugecontroller/Gaugecontroller.ino
+++ b/Gaugecontroller/Gaugecontroller.ino
@@ -467,6 +467,7 @@ bool parsePosQuery(const String& line) {
       CMD_PORT.print(' ');
       CMD_PORT.println(gauges[i].sweepEnabled ? 1 : 0);
     }
+    sendReply("OK");
     return true;
   }
   return false;
@@ -508,6 +509,7 @@ void readCommands() {
       rxLine += c;
       if (rxLine.length() > 120) {
         rxLine = "";
+        sendReply("ERR TOO_LONG");
       }
     }
   }