As is known, in Minecraft multiplayer mode, the frequently used way of in-game communication is chat.
However, there's no theory to support this way of communication.
How, without any device or any personal superpower?
This light-weight mod added Signal to Minecraft overworld, generated by a tiny communicator(install JEI to check the recipe).
With the communicator in hand, several (5, in v1.0.0) types of signals could be sent in three ranges: within 1km, over-dimension, and over-server.



Now the below types of signals could be sent:
With extra features:
ATTENTION:
Hope you enjoy the mod!
No files available for download.