code: def valid_body_waiting(self):
          
          # 0f f8 be 04 00 08 00 00 2f 04
          packet_size = velbus.MINIMUM_MESSAGE_SIZE + \
              (self.buffer[3] & 0x0F)
          if len(self.buffer) < packet_size:
              self.logger.debug("Buffer does not yet contain full message")
              result = False
          else:
              result = True
              result = result and self.buffer[packet_size - 1] == velbus.END_BYTE
              if not result:
                  self.logger.warning("End byte not recognized")
              result = result and velbus.checksum(
                  self.buffer[0:packet_size - 2])[0] == self.buffer[packet_size - 2]
              if not result:
                  self.logger.warning("Checksum not recognized")
          self.logger.debug("Valid Body Waiting: %s (%s)", result, str(self.buffer))
          return result
docs: Check if a valid body is waiting in buffer