Data buffering

[buuuudzik]

I checked this and the problem is not in UDP client-server. It works great but when I try send the command via TCP my connection is refused. I try to send cmd to the RS485 server. This is the script:

Code:

if not server then
 -- local UDP server on port 5432
 server = require('socket').udp()
 server:settimeout(1)
 server:setsockname('127.0.0.1', 5432)
 
 -- serial connection
 port = require('serial').open('/dev/RS485', {
   baudrate = 4800,
   parity = 'odd',
   duplex = 'half',
   databits = 8,
   stopbits = 1
 })
end

cmd = server:receive()

if cmd then
function somfy_rf(cmd)
serial_server_ip = '192.168.2.15'
host, port = serial_server_ip, 10001
socket = require("socket")
client = socket.tcp()
client:settimeout(1)
client:connect(host, port)
client:send(cmd)
end
 somfy_rf(cmd)
 if #cmd == 12 then
   time = 6
 elseif #cmd == 13 then
   time = 0.6
 elseif msg == set_channel then
   time = 0.45
 end
 os.sleep(time)
end

Where is the error?

---

This is the network configuration of the serial server.