diff --git a/serial_port_class_api/include/CLASS_SerialPort.h b/serial_port_class_api/include/CLASS_SerialPort.h
index 360e9a5fd34188fd6977064ef01e34857f3f8a6a..1445aeafeb15ecbdd365d9a076fe94842d669366 100644
--- a/serial_port_class_api/include/CLASS_SerialPort.h
+++ b/serial_port_class_api/include/CLASS_SerialPort.h
@@ -189,6 +189,8 @@ public:
 	std::string ping();
 	
 	std::string getHelp();
+
+	std::string sendCustomCommand(std::string &command);
 };
 
 #endif
\ No newline at end of file
diff --git a/serial_port_class_api/src/CLASS_SerialPort.cpp b/serial_port_class_api/src/CLASS_SerialPort.cpp
index 4eba738ce5167637c7d14acc10baa5bb42a60b17..471f8248688857aae2a6763ecd432d1cf7980609 100644
--- a/serial_port_class_api/src/CLASS_SerialPort.cpp
+++ b/serial_port_class_api/src/CLASS_SerialPort.cpp
@@ -168,9 +168,9 @@ std::string CLASS_SerialPort::communication(const char *buffer, std::string auxC
 
 	std::string result;
 
-	std::string buf("[" + auxControl + "] ");
-	buf.append(buffer);
-	buffer = buf.c_str();
+	//std::string buf("[" + auxControl + "] ");
+	//buf.append(buffer);
+	//buffer = buf.c_str();
 
 	bool ret = write(buffer);
     if(!ret)
@@ -1526,4 +1526,16 @@ std::string CLASS_SerialPort::getHelp()
 	std::string msg = commands::ClassCommands::CMD_HELP;
 	std::string result = communication(msg.c_str());
 	return result;
+}
+
+/**
+ * @brief sends custom command to class
+ * 
+ * @param command custom command string to send to class device
+ * @return std::string answer
+ */
+std::string CLASS_SerialPort::sendCustomCommand(std::string &command)
+{
+	std::string result = communication(command.c_str());
+	return result;
 }
\ No newline at end of file
diff --git a/serial_port_class_api/src/main.cpp b/serial_port_class_api/src/main.cpp
index ad1f26bf4a349973d3668479f1dbcbac5c67bbc8..317788559a3976a3ccca6c63cba33aa76f402997 100644
--- a/serial_port_class_api/src/main.cpp
+++ b/serial_port_class_api/src/main.cpp
@@ -20,19 +20,23 @@ using namespace std;
 int main(void)
 {
     std::string port;
-    port = "COM3"; // name of port assigned to class bluetooth device
+    port = "COM4"; // name of port assigned to class bluetooth device
     CLASS_SerialPort serial;
     bool port_status = serial.SetOpenPort(port);
 
     cout << "Port Status :";
     cout << port_status <<endl;
- 
+
     if(port_status == 1)
     {
         //start communication command depending on device --> startFESCommunication() ; startTACTILITYCommunication() ; startCommunication(std::string &prototipeName)
         std::string start_communication = serial.startFESCommunication();
         cout << "start_communication : " + start_communication << endl;
 
+        std::string customcommand = "ping\r\n";
+        std::string custom = serial.sendCustomCommand(customcommand);
+        cout << "custom : " << custom << endl;
+
         std::string setStimulationOn = serial.setStimulationOn(); 
         cout << "setStimulationOn : " << setStimulationOn << endl;
 
@@ -301,13 +305,16 @@ int main(void)
         //std::string setRTCTime = serial.setRTCTime(time);
         //cout << "setRTCTime : " << setRTCTime << endl;
 
-
         std::string ping = serial.ping();
         cout << "ping : " + ping << endl;
 
         std::string help = serial.getHelp();
         cout << "Help : " + help << endl;
 
+        std::string customcommand = "ping\r\n";
+        std::string custom = serial.sendCustomCommand(customcommand);
+        cout << "custom : " << custom << endl;
+
         std::string shutDown = serial.shutDown();
         cout << "shutDown : " << shutDown << endl;