http request

[admin]

Try this, your content-length header does not include initial XML line.
Edit: you are missing Host and Connection headers.

Code:

data =
'<?xml version="1.0" encoding="UTF-8"?>\r\n' ..
'<Packet>\r\n' ..
'<Command>getRequest</Command>\r\n' ..
'<AirConditioner>\r\n' ..
'<OpGroup GrNo="1" OnOff="*" Mode="*" ErrorStatus="*"></OpGroup>\r\n' ..
'</AirConditioner>\r\n' ..
'</Packet>'

-- http request  
reqs = 'POST /servlet/MIMEReceiveServlet.asp HTTP/1.1\r\n'..
'Content-Type: text/xml\r\n'..
'Host: ' .. ip .. '\r\n' ..
'Connection: close\r\n' ..
'Content-Length: '.. #data..'\r\n\r\n' ..
data

sock = socket.tcp()
sock:settimeout(70)

res, err = sock:connect(ip, port)
log(res,err)

if res then
  res, err = sock:send(reqs)

  if res then
    log('send OK')
    
    res2, err2 = sock:receive("*a")
    sock:close()

    log(res2,err2)
  else
    log('send failed: ' .. tostring(err))
  end
else
  log('connect failed: ' .. tostring(err))
end