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Naming convention

Homie device - same as RoomHub - it is not the same as "device" (see below)

Device - sensor or controller connected to RoomHub (e.g. relay module or switch button)

PJON Controller - Additional controller (e.g. Arduino Pro Mini) used to provide communication with RoomHub, for devices which are using other communication channels than simple digital or analog wire (e.g. serial, I2C or 1-Wire).

Point - each place connected to RoomHub with single ethernet/UTP cable, can have many devices connected to it

Room - space containing multiple points, it helps divide configuration into logical parts, but has currently no other influence after configuration is send to RoomHub (e.g. kitchen which has multiple light switches)

Wire - single wire of UTP cable which may be use to connect one (digital/analog) or multiple (PJON) devices.