code: def send_key(self, key):
          
          # Sanity check it's a valid key
          if key not in KEYS:
              return ['error', None]
  
          url = 'http://%s/WAN/%s/%s_ctrl.cgi' % (self._host, 'dvdr', 'dvdr')
          data = ('cCMD_RC_%s.x=100&cCMD_RC_%s.y=100' % (key, key)).encode()
  
          return self.send_cmd(url, data)
docs: Send the supplied keypress to the device