HELP luasocket changed in build 31

[admin]

Working example:

Code:

if not ready then
  copas = require('copas')
  socket = require('socket')

  udpserver = socket.udp()
  udpserver:setsockname('127.0.0.1', 51034)

  function udphandler(udpsock)
    udpsock = copas.wrap(udpsock)
    log('udp connection handler')

    while true do
      local data, err = udpsock:receive()
      if data then
        log('received data', data)
      end
    end
  end

  function parse(data)
    log(data)
  end

  function sendtcp(command)
    if connected then
      tcpsock:send(command)
      copas.sleep(0.5)
    end
  end

  ready = true

  function tcpconnect()
    local sock = socket.tcp()

    tcpsock = copas.wrap(sock)
    tcpsock:settimeout(1)

    connected, err = tcpsock:connect('192.168.0.175', 4999)

    if connected then
      log('connect ok')
      sendtcp('#COSMSGS=false\r')
      sendtcp('#MODEL?\r')
    else
      log('connect failed', err)
      copas.sleep(1)
    end
  end

  function tcphandler()
    while true do
      if connected then
        local resp, err = tcpsock:receive('*r')

        if resp then
          local status, data = pcall(parse, resp)
          if not status then
            log('parse failed', data)
          end
        elseif err == 'closed' then
          log('disconnected')

          connected = false
          tcpsock:close()
          tcpsock = nil
          collectgarbage('step')
          copas.sleep(1)
        end
      end

      if not connected then
        tcpconnect()
      end
    end
  end

  copas.addserver(udpserver, udphandler, 0)
  copas.addthread(tcphandler)
end

copas.loop()