The location for LCA2019 has been announced - Christchurch NZ (aka here!), at the University of Canterbury.
Linux, electronics and IoT sort of go together pretty well. Theme is "Linux of Things" - so I expect lots of IoT and embedded topics. Even if you are not a big Linux User there are usually some interesting specialist mini-conferences alongside it.
See
http://lca2019.linux.org.au/ to subscribe to the mailing list.