code: def do_ctrlc(self, arg):
          ''' Ctrl-C sends a STOP command to the arm. '''
          print('STOP')
          if self.arm.is_connected():
              self.arm.write('STOP'f do_ctrlc(self, arg):
          ''' Ctrl-C sends a STOP command to the arm. '''
          print('STOP')
          if self.arm.is_connected():
              self.arm.write('STOP')
docs: Ctrl-C sends a STOP command to the arm.