电梯
From Senfi Docs
Senfi里的电梯代表着现实世界中的物理电梯。电梯是Senfi中的专用传感器，可能包含一个或多个测量值。
必须在测量中创建lsid标签，并将其标记为必需标签。
大堂
大堂代表现实世界中的电梯大堂。一个大堂可能包含一个或多个电梯。
Stop
Stops are levels that the lift can travel. Stops starts from 1 and begins from the lowest to the highest serving level.
For example: Lift A in below image is serving from level 2 of Blk A, so stop 1 of the Lift A is Level 2.
Lifts are associated with lobby and lift's stops may within one or more blocks of the same building.
For example: Lift A in below image is serving levels within Blk A but Lift C is serving from level 1 of Blk B to level 5 of blk C.
