Server2

CLIENT_PORT = 0
io.write("Set a server port: ")
SERVER_PORT = tonumber(io.read())
print("Server port has been set to: "..SERVER_PORT)

local modem = peripheral.find("modem")
modem.open(SERVER_PORT)

if CLIENT_PORT == 0 then
    print("I am not broadcasting to anyone")
end


function pingLoc()
    io.write("Select robot to ping: ")
    local num1 = tonumber(io.read())
    modem.transmit(num1, num1, "pingLoc")
end

while true do

    event, modemSide, senderChannel, replyChannel, message, distance = os.pullEvent("modem_message")
    if message == "connectMessage" then
        print("Connection detected from "..replyChannel)
        modem.transmit(replyChannel, SERVER_PORT, "connectSuccess")
    end

    local command = io.read()

    if command == "Loc" then
        pingLoc()
    end
end