Arcam control over ip

[Thinklight]

Hi,
What I am doing wrong?
I want to control Arcam receiver over IP and put in Command function this code:

Code:

function tcp_arcam(data, ip, port)  local sock, res, err  sock = require('socket').tcp()  sock:settimeout(5)  res, err = sock:connect(ip, port or 50000)    if res then    res, err = sock:receive(5)    if res == 'PJ_OK' then      sock:send('PJREQ')      res, err = sock:receive(5)      if res == 'PJACK' then        sock:send(data)        res, err = sock:receive(6)      else        alert('invalid/no ack: ' .. tostring(res))        end    else      alert('invalid/no init: ' .. tostring(res))      end  else    alert('connect failed: ' .. tostring(err))  end  sock:close()  return res, err end

Then from event script using this:

Code:

cmdon  = string.char(0x21, 0x01, 0x00, 0x01, 0xF0, 0x0D) cmdoff = string.char(0x21, 0x01, 0x00, 0x00, 0xF0, 0x0D) ip = '192.168.11.112' if (event.getvalue()==true) then  res, err = tcp_arcam(cmdon, ip) else  res, err = tcp_arcam(cmdoff, ip) os.sleep(2.5)  res, err = tcp_arcam(cmdoff, ip) end log (res, err)

Manual of receiver is her: Manual of control