ArKnator

ArKnator will make your phone become an Art-Net LED tile but also a traffic visualizer.
The mobile application must be on the same Wi-Fi network than an ArtNet server.
You can use ArKaos GrandVJ or ArKaos MediaMaster as an ArtNet server.
ArtNet is a communication protocol for transmitting the DMX lighting control protocol over Ethernet.
DMX itself is a standard for digital communication networks that are commonly used to control stage lighting, effects, ​and light dimmers.