Making this post because before I bought this (amazing) game, I was trying to learn about the extent of craft automation and (more importantly) communication. A lot of the posts I was finding seemed to indicate that broadcasting to nearby crafts wasn't working, and that the Ansible mod was required for this to work.
So this post is for any future explorers: Broadcasting to nearby crafts does work without the Ansible mod, which means it works on mobile too.
You just need to have the sender and receiver be within physics range. Once a craft exits physics range, it does not seem to receive broadcasts anymore.
Hopefully this helps anyone looking for answers!
If the developers add a block for changing the Craft name to Vizzy, it might work. This block is only available for Crafting parts.