Get the State before the last State

Setup, Configuration and Use Scripts & Rules
1

Hello All,

I have a question regarding the rules.

How can i find the state before the last state? or maybe three states in the past?

I don’t want to use time for it, but simple query to the persistence and get the values.

Is this possible?

Thanks all for the support.

2

You can get the previousState or the previousState that is different from the current state.

MyItem.previousState // most recent value in the persisted database not counting the current state
MyItem.previousState(true) // most recent value in the persisted database that is different from the current state

Obviously, the above methods require persistence to be set up and configured.

If you have a changed trigger for your rule, there will be a previousState variable provided to your Rule that you can use.

Beyond that, you will have to keep track of the state changes yourself in Rules using Unbound/Virtual Items or global variables…

3

Many thanks for the reply…

I guess then i will need to control it via variables.

4

Hello,

I found this post because I had the same problem and found a solution which I wanted to share. InfluxDB is used for persistence and I need the the actual state, the last state and the state before the last state.

variable with item.state and item.previousState at the beginning of the rule

var EZ_Esstisch_previous = EZ_Esstisch_dimmer.previousState(true,"influxdb").state as Number
    var EZ_Esstisch_now = EZ_Esstisch_dimmer.state as Number

and then at the end of each “if”

EZ_Esstisch_preprevious.sendCommand(EZ_Esstisch_previous)

EZ_Esstisch_preprevious is a string item:

String
    EZ_Esstisch_preprevious
    "EZ_Esstisch vorletzter Wert"

In my example the rule looks like:

rule "EZ_Esstisch switch"
when
    Item EZ_Esstisch_dimmer received command
then
    val EZ_Esstisch_previous = EZ_Esstisch_dimmer.previousState(true,"influxdb").state as Number
    var EZ_Esstisch_now = EZ_Esstisch_dimmer.state as Number
    var EZ_Dimmer_time = 0
    val Number EZ_max_dim = 7 //Zeit in Sekunden bis zur max. Helligkeit
    if (receivedCommand == ON || receivedCommand == OFF) {
        EZ_Esstisch_command.sendCommand(ON)
        Thread::sleep(100)
        EZ_Esstisch_command.sendCommand(OFF)
        EZ_Esstisch_preprevious.sendCommand(EZ_Esstisch_previous)
end

I hope it helps.

Best regards
BrainPain

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