diff --git a/hardware/Core.PcbDoc b/hardware/Core.PcbDoc
index c35f1b6..4f39409 100755
--- a/hardware/Core.PcbDoc
+++ b/hardware/Core.PcbDoc
Binary files differ
diff --git a/hardware/Sheet1.SchDoc b/hardware/Sheet1.SchDoc
index f3406a5..50eef07 100755
--- a/hardware/Sheet1.SchDoc
+++ b/hardware/Sheet1.SchDoc
Binary files differ
diff --git a/software/card9.js b/software/card9.js
index 8473824..453a471 100755
--- a/software/card9.js
+++ b/software/card9.js
@@ -14,16 +14,28 @@
     client: client,
     reason: 'System',
   });
+  var timerId = setInterval(function(){
+    c.write(encoder.command(defines.commands.heartBeep));
+  }, 3000);
+  var cleanAction = function(){
+    local.removeListener('command', commandListener);
+    c.end();
+    clearInterval(timerId);
+  }
+  c.on('end', cleanAction);
+  c.on('error', cleanAction);
   c.on('end', function() {
     logger({
 			event: 'Client disconnected',
 			client: client,
 			reason: 'System',
     });
-    local.removeListener('command', commandListener);
   }).on('error', function(){
-  	c.end();
-    local.removeListener('command', commandListener);
+  	logger({
+			event: 'Client connection lost',
+			client: client,
+			reason: 'System',
+    });
   });
   var commandListener = function(command){
   	switch(command){
diff --git a/software/utils/defines.js b/software/utils/defines.js
index 0c8a608..e7bfa3c 100644
--- a/software/utils/defines.js
+++ b/software/utils/defines.js
@@ -27,10 +27,12 @@
 		doDoorOpen: 0,
 		doAlarmOn: 1,
 		doAlarmOff: 2,
+		heartBeep: 3,
 		map: [
 			"doDoorOpen",
 			"doAlarmOn",
 			"doAlarmOff",
+			"heartBeep"
 		],
 	},
 	requests: {