Min/Max temp output

Setup, Configuration and Use Scripts & Rules
1

Hi everyone,

I wanted to make a graph bar displaying minimum and maximum temperature per day… so it should not be a flowing chart… but litterally per day the absolute max and absolute minimum temperature… so I can track the days/weeks/months for these values…

any idea on how to do this?

I could write a rule to set a value… with multiple items, but perhaps there is an easier way

on outdoor_temp change #getting highest value and lowest value)
item maxvalueinterim = outdoor_temp if (outdoor_temp > maxvalueinterim )
item minvalueinterim = outdoor_temp if (outdoor_temp < minvalueinterim )

at 0:00 (#writing max and min value per day at midnight)
item maxvalue=maxvalueinterim
item minvalue=minvalueinterim
maxvalueinterim = 0 #as max value will always be >0
minvalueinterim = 100 #as max value will always be <100

create a graph with maxvalue & min value on the same axis

2

If you just want to have a chart showing the min or max value, you do not need additional items and can configure the chart to show min/max values …

Have a look into the built in analyzer, there you can change the aggregation from avg (default) to something else

3

thats what I was hoping for… but it still gives me the ranges (going up and down) rather than pure min/max values per day… see below example - essentially i want the big red and big blue lines… not the thin blue line

image
image1634×541 127 KB

4

Can you colour it white, or give it zero thickness?

5

as far as I understand the thick red and blue lines were manually added in the taken screenshot; they are wanted but not yet shown in the original graph ( see there are some peaks that are higher than the red line ).

6

I think you only added the lables for min and max value. Not the min resp. the max curve.
Just did some experiments the first but. I have the impression that you only can have on or the other ( min or max curve but not both. At least I was not able to get both of them.

Screenshot from 2022-09-27 21-27-11
Screenshot from 2022-09-27 21-27-111903×799 41 KB

7

made it into this - which hopefully gives me the overview later…

rule "Set MinMax"
when
    Item velbusvmbpiro_Outdoor_Temperature changed
then

    logInfo("WEATHER","Minimum temperature " + minvalueinterim.state)
    logInfo("WEATHER","Maximum temperature " + maxvalueinterim.state)    
    logInfo("WEATHER","OUTSIDE temperature " + velbusvmbpiro_Outdoor_Temperature.state)
    if (velbusvmbpiro_Outdoor_Temperature.state >= maxvalueinterim.state) {
        maxvalueinterim.postUpdate(velbusvmbpiro_Outdoor_Temperature.state)
    }
    if (velbusvmbpiro_Outdoor_Temperature.state <= minvalueinterim.state) {
        minvalueinterim.postUpdate(velbusvmbpiro_Outdoor_Temperature.state)
    }
    logInfo("WEATHER","Minimum temperature " + minvalueinterim.state)
    logInfo("WEATHER","Maximum temperature " + maxvalueinterim.state)
end

rule "midnight update"
when
    Time cron "5 0 0 * * ?"
then
    // set the min max temperatures for that day in the fixed variables
    maxvalue.postUpdate(maxvalueinterim.state)
    minvalue.postUpdate(minvalueinterim.state)

    //reset the interim values for the next day
    // min == 100 (it would always be less -as I hope we don't have >100C)
    // max == 0 (we dont have freezing cold here.. so temp would always be >0)
    maxvalueinterim.postUpdate(0)
    minvalueinterim.postUpdate(100)
end

rule "Reset temps on OH Start"
// rule to set the variables on system start - we can filter these out in the graph based on max / min values
when
    System started
then
    // min == 100 (it would always be less -as I hope we don't have >100C)
    // max == 0 (we dont have freezing cold here.. so temp would always be >0)
    maxvalueinterim.postUpdate(0)
    minvalueinterim.postUpdate(100)
end

and created the following items:

Number:Temperature maxvalueinterim
Number:Temperature minvalueinterim
Number:Temperature maxvalue
Number:Temperature minvalue
8

Thanks for posting this.

Someone asked about this a few days ago and I said I’d need to think about it… Turns out… I just had to do a quick search…

I have tweaked your rule just a little, to make it easier for people to adopt it into their systems, by only needing to change the item name in two places

rule "Set MinMax Outdoor temp"
when
    Item Meteo_Temperature changed		// for testing, change this to "received update" 
	
	then
		logInfo("WEATHER","MinMax Rule started")
		
	var temp = Meteo_Temperature.state
		
		
		logInfo("WEATHER","Outside temp is "+temp)
		
		
		// check if null states
		
	if (maxvalueinterim.state  == NULL || maxvalueinterim.state == UNDEF) {
	maxvalueinterim.postUpdate(0)
	}

	
	if (minvalueinterim.state  == NULL || minvalueinterim.state == UNDEF) {
	minvalueinterim.postUpdate(0)
	}
		
		
    logInfo("WEATHER","Previous Minimum temperature " + minvalueinterim.state)
    logInfo("WEATHER","Previous Maximum temperature " + maxvalueinterim.state)    
    logInfo("WEATHER","OUTSIDE temperature " + temp)

    if (temp >= maxvalueinterim.state) {
        maxvalueinterim.postUpdate(temp)
    }
    if (temp <= minvalueinterim.state) {
        minvalueinterim.postUpdate(temp)
    }
    logInfo("WEATHER","New Minimum temperature " + minvalueinterim.state)
    logInfo("WEATHER","New Maximum temperature " + maxvalueinterim.state)
end

rule "midnight update"
when
    Time cron "5 0 0 * * ?"
then
    // set the min max temperatures for that day in the fixed variables
    maxvalue.postUpdate(maxvalueinterim.state)
    minvalue.postUpdate(minvalueinterim.state)

    //reset the interim values for the next day
    // min == 100 (it would always be less -as I hope we don't have >100C)
    // max == 0 (we dont have freezing cold here.. so temp would always be >0)
    maxvalueinterim.postUpdate(0)
    minvalueinterim.postUpdate(100)
end

I could add a triggering item line, I’ll work on that and update this