Client

local component = require("component")
local serialization = require("serialization")
local event = require("event")
local m = component.modem
local serverAddress = ""
local localAddresS = ""
local connected = false

function connectToServer()
    m.open(5)
    if m.isOpen(5) then
        print(m.isOpen(5))
        m.broadcast(5, serialization.serialize({to="router", method="connection"}))
        print("Sent a request for address")
        print("Waiting for answer")
        local _, localAddress, from, port, distance, message = event.pull(5, "modem_message")
        localAddresS = localAddress
        message = serialization.unserialize(message)
        if message.connected == true then
            serverAddress = from
            connected = true
            print("Connected with the router: " .. serverAddress)
            return
        end

    else
        print("Can't bind on port: 5")
    end
end

function listen(port)
    m.open(port)
    local _, localAddress, from, port, distance, message = event.pull("modem_message")
    message = serialization.unserialize(message)
    return message
end

function send(port2, to2, message2)
    if connected == true then
        m.open(10)
        m.send(serverAddress, 10, serialization.serialize({port = port2, from = localAddresS, time = os.time(os.date("!*t"))
, to = to2, message = message2, message2 = "true"}))
        m.close(10)
        print("sent message to router")
        return
    else
        print("You can not send. You are not conneted")
    end
end
function broadcast(port, message)
        m.send(serverAddress, port, serialization.serialize({method = "broadcast", message = message, port = port}))
end
connectToServer()
send(123, localAddresS, "Hi")
result = listen(123)

print("Test123: " .. tostring(result.message))