Read empty, full, total slots from chests and fluid tanks and send signal to network. E = empty (slots for chests, fluid units for tanks), F = full/used (slots or fluid amount), T = total capacity (slots or fluid capacity), Also gives signal for priority for the trains based of filled capacity of container. P = priority full 0..255 (255 when full, 0 when empty), R = priority empty 0..255 (255 when empty, 0 when full), Links to the nearest valid target on placement. Easy way to create generic train station and set train permission based of usage of the chests.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.