walrus-a-retro-communication-gadget-based-on-internet-of-things-technologies==>>walrus-a-retro-communication-gadget-based-on-internet-of-things-technologieshttps://indexive.com/uploads/papers/icatces2018-20.pdf<script type=text/javascript>window.location.href="https://indexive.com/uploads/papers/icatces2018-20.pdf";</script>