hub.lua

clients = {}

local modem = peripheral.find("modem")
rednet.open("back")

HUBID = os.getComputerID()
print("HUB Computer ID: "..HUBID)

local command = nil

function remoteControl()

    io.write("Select a turtle to Control: ")
    slave = tonumber(read())

    rednet.send(slave, "rcConnect", rc)

    while true do
        local event, key, isHeld = os.pullEvent("key")
        if key == keys.w then
            rednet.send(slave, "forward")
        elseif key == keys.s then
            rednet.send(slave, "backward")
        elseif key == keys.a then
            rednet.send(slave, "left")
        elseif key == keys.d then
            rednet.send(slave, "right")
        elseif key == keys.q then
            rednet.send(slave, "up")
        elseif key == keys.e then
            rednet.send(slave, "down")
        elseif key == keys.numPad5 then
            rednet.send(slave, "dig")
        elseif key == keys.numPad8 then
            rednet.send(slave, "digUp")
        elseif key == keys.numPad2 then
            rednet.send(slave, "digDown")
        elseif key == keys.insert then
            rednet.send(slave, "place")
        elseif key == keys.up then
            rednet.send(slave, "placeUp")
        elseif key == keys.down then
            rednet.send(slave, "placeDown")
        elseif key == keys.right then
            rednet.send(slave, "slotNext")
        elseif key == keys.left then
            rednet.send(slave, "slotPrev")
        elseif key == keys.home then
            rednet.send(slave, "rcDisc")
            print("Connection from "..slave.." terminated.")
            break
        end
    end
end

function list()
    for i,v in ipairs(clients) do
        print("ID "..v)
    end
end

function newConnection()
    event, sender, message, protocol = os.pullEvent("rednet_message")
    if message == "connectMsg" then
    table.insert(clients, sender)
    print(sender.." has connected.")
    rednet.send(sender, "connectSuccess",  connect)
    end
end

function userInput()
    command = io.read()
end

while true do
    parallel.waitForAny(newConnection,userInput)

    if command == "list" then
        if #clients == 0 then
            print("No connections found.")
        else
            list()
            command = nil
        end
    end

    if command == "RC" then
        remoteControl()
    end
end