An ASCII Aquarium Has Swimming Fish That Display the Temperature—and Ghosts for Halloween

A maker created an ASCII-style aquarium for a smart-home display. Fish made from characters swim across the screen, including one that shows a live sensor temperature. Home Assistant can trigger falling food that the fish chase, and users can adjust fish count and swimming speed. A Halloween mode replaces fish with pumpkins, ghosts, and other spooky icons, and a scare effect displays an image and plays a sound. The panel can also show a voice assistant's state.