TCP Socket Connection for Legrand

[a455115]

Code:

function read(sock)   local buf = {}   while true do     local ch, err = sock:receive(1)     if ch then       local pr = buf[ #buf ]       buf[ #buf + 1 ] = ch       if ch == '#' and pr == '#' then         break       end     else       return nil, err     end   end   local ret = table.concat(buf)   log(ret)   return ret end ACK = '*#*1##' NACK = '*#*0##' OPEN = '*99*1##' function openwebnetinit()   local socket = require('socket')     local sock = socket.tcp() sock:settimeout(1)    local res, err = socket.connect('192.168.1.247', 20000)   if not res then     alert('connect failed ' .. tostring(err))     return   end   res, err = read(sock)   if res ~= ACK then     alert('no initial ack ' .. tostring(res or err))     return   end   sock:send(OPEN)   res, err = read(sock)   if not res then     alert('no nonce ' .. tostring(err))     return   end   local nonce = res:match('%d+')   res, err = read(sock)   if res ~= ACK then     alert('auth failed ' .. tostring(res or err))     return   end   return sock end sock = openwebnetinit() if sock then   alert('connection ok')   -- do something here   sock:close() end

Code:

Resident script:5: calling 'receive' on bad self (tcp{client} expected, got userdata) stack traceback: [C]: in function 'receive' Resident script:5: in function 'read' Resident script:43: in function 'openwebnetinit'

Apparently I'm confusing something general?