# Making friends and influencing nodes, with multicasting

**URL:** <https://forum.devtalk.com/t/making-friends-and-influencing-nodes-with-multicasting/7717>\
**Category:** Blogs/Articles/Talks/Podcasts\
**Tags:** elixir, otp, nerves, blog-post\
**Created:** [9 March 2021 21:38 UTC](https://forum.devtalk.com/t/making-friends-and-influencing-nodes-with-multicasting/7717 "2021-03-09T21:38:32Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![paulanthonywilson](https://forum.devtalk.com/user_avatar/forum.devtalk.com/paulanthonywilson/32/2494_2.png) [@paulanthonywilson](https://forum.devtalk.com/u/paulanthonywilson)\
**Post date:** [9 March 2021 21:38 UTC](https://forum.devtalk.com/t/making-friends-and-influencing-nodes-with-multicasting/7717/1 "2021-03-09T21:38:32Z")

</div>

> **[Making friends and influencing nodes, with multicasting](https://furlough.merecomplexities.com/elixir/otp/networking/nerves/2021/03/09/fun-with-multicasting.html)**
>
> How are you going to make friends if no-one knows you exist? That can be a real problem for some Elixir nodes, for example a few Raspberry Pi Zeroes running Nerves on a local network. One answer is to use the power of multicasting. I will walk you...

Post on using UDP multicasting with Elixir to broadcast presence, and listen for peers, on a local network. I have found this approach useful if I want [Nerves devices](https://www.nerves-project.org) to cooperate in some way.