Limiting the number of telegram messages

Setup, Configuration and Use Scripts & Rules
1

I have a problem limiting the number of messages a rule can send in a certain time.

I have a over 100 temp sensors which report readings via mqtt at 1s intervals each.
I have voltage, amps, power monitoring at 2s intervals, I need to be alerted of power failure.
I have smoke sesors reporting at 1s intervals.

Using simple rules I can get an almost instant Telegram alert if any of them gets triggered, BUT I keep getting the alerts over and over and over again, almost rendering my phone useless because of the message flood.

I need a piece of advice about how to limit the number of messages dispatched, something like once every 10s, or every 20s.
I don’t want them to be “one time only” since I might be busy and miss the alert, so repeating is better, but not flooding my phone at 1s intervals.

Here is one of the rules:

rule "max temp alert"
when
    Item gTehnicalTempSensors received update
then
    if (gTehnicalTempSensors.state as Number >= 40) {
        val StringBuilder sb = new StringBuilder
        gTehnicalTempSensors.allMembers.filter[ i | i.state as Number > 40 ].forEach[ i | sb.append(i.name.toString +" ")]
        logError("Temperature:", "Temperatura sisteme peste 40 grade Celsius!"+sb.toString)
        sendTelegram("kCritical", "Temperatura sisteme peste 40 grade Celsius! "+sb.toString)
    }
end

PS. this rule also triggers a weird error every time I save the file, the rule works as expected, it’s just annoying

01:45:07.094 [ERROR] [untime.internal.engine.RuleEngineImpl] - Rule 'max temp alert': Script interpreter couldn't be obtain
2

A simple method is to trigger an Item that rules use to block messaging until it expires.
But it sounds more like the queuing example here would suit (no dropped messages)

3

Since I need them to drop the same repeating message if it occurs in a 5s window I implemented a virtual flag Switch Item which gets set when the first message is sent and then restored by a 5s timer.
Thank you!

PS. God damn DSL, this language is everything but a programming language, takes ages to figure out something I can do in C for Arduino in 30 seconds…

4

I use the expire binding for that, so the virtual switch item switches itself off…