diff --git a/KorMYS/src/main.cpp b/KorMYS/src/main.cpp
index 3d601e0..fabf80c 100644
--- a/KorMYS/src/main.cpp
+++ b/KorMYS/src/main.cpp
@@ -141,6 +141,10 @@ void loop()
 			wait(100);
 			send(msgHum10.set(p10, 1));
 		}
+		if (++cSec > 19){
+			cSec = 0;
+			sendHeartbeat();
+		}
 	}
 }