Delay¶

Overview¶

A delay can be set to a Value so that the changes of the Value are delayed instead of being immediately published.

Warning

Errors on a delayed Value are also delayed.

@startuml
skinparam backgroundColor transparent
robust "Delay value" as delay
robust "External value" as value

@0
value is 0
delay is 0

@1
value is 10
value -> delay : Trigger

@delay
@1 <-> @2 : 1s

@2
delay is 10

@3
value is 15
value -> delay : Trigger

@delay
@3 <-> @4 : 1s

@3.5
value is 20
value -> delay : Trigger

@4
delay is 15

@delay
@3.5 <-> @4.5 : 1s

@4.5
delay is 20

@enduml

The External value is the source of the delay.
The Delay value is the resulting value as published by OnSphere.
The blue arrow indicates that the value is read by OnSphere.
The red arrow indicates the duration of the delay.

Example¶

This can be used for example to delay the locking of a door when pushing on a button, so the person has time to leave the room before it closes.