Guide: Register the client communication protocol

PackageHandlers.registerClientHandler("LevelSendClient", function(player, packet)

    if (packet[1] == "") 
    then
        print("packet[1] is empty")
        packet[1] = 1
    end
    Me:setValue("level",packet[1])

end)

PackageHandlers.registerClientHandler("ExpSendClient", function(player, packet)

    if (packet[1] == "") 
Then
        print("packet[1] is empty")
        packet[1] = 0
    end
    Me:setValue("exp",packet[1])

end)