def open_button_clicked(self):
        if self.serial.isOpen():
            self.thread.close()
            self.open_close_button_handler(False)
            print("Closed port")
            print(self.serial)
            self.statusTextBrowser.setText("Zamknięto port: " + self.get_selected_port())
        else:
            setattr(self.serial, 'port', self.get_selected_port())
            setattr(self.serial, 'baudrate', 57600)
            try:
                self.serial.open()
            except serial.SerialException as exp:
                print("SerialException - open_button_clicked", str(exp))
            except (IOError, OSError) as exp:
                print("IOError || OSError", str(exp))
            else:
                self.serial.reset_input_buffer()
                self.serial.reset_output_buffer()
                print("Opened port")
                print(self.serial)
                self.statusTextBrowser.setText("Otwarto port: " + self.get_selected_port())
                self.open_close_button_handler(True)
                self.thread.start()