code: def connection_made(self, transport):
          
          _LOGGER.info('Connection established to PLM')
          self.transport = transport
  
          self._restart_writer = True
          self.restart_writing()
  
          # Testing to see if this fixes the 2413S issue
          self.transport.serial.timeout = 1
          self.transport.serial.write_timeout = 1
          self.transport.set_write_buffer_limits(128)
          # limit = self.transport.get_write_buffer_size()
          # _LOGGER.debug('Write buffer size is %d', limit)
          if self._aldb.status != ALDBStatus.LOADED:
              asyncio.ensure_future(self._setup_devices(), loop=self._loop)
docs: Start the PLM connection process.
  
          Called when asyncio.Protocol establishes the network connection.