Thank you Rich for your assistance and to whom like you that makes this things affordable.
I tried with influxdb as well with same strategy but with no succes. Rule is triggered only if I get the avarage in the past.
I would like my terrace rollers go up when the wind intensity it lasts enough, at least 7/10 seconds.
Many thanks indeed
I can’t tell if there is a language issue or something else. You talk about a “future average” but now you say “when the wind intensity it lasts enough” which only requires past data.
But “7/10” seconds is far too short to get anything out of rrd4j. It only saves data on changes and every minute. And even if your sensor is changing really fast, rrd4j doesn’t save data fast enough that you’ll ever have more than one or two values over a 10 second period. So it’s always just going to give you the most recent value.
You’ve still not said what the “average since” is actually returning. What is “doesn’t work”?
How often does this Item update? If it’s not at least once a second (but no faster as rrd4j will throw away values faster than once per second) you’ll never get anything meaningful from average since.
All average since does is get all the records between now and the time you pass to it and gives you the average of those values. If there’s only one record between now and ten seconds ago there’s no average.
Getting the average over the past five minutes should work. Over the past minute might work. Anything shorter than that is almost certainly not going to work. You need to keep a running average yourself and can’t use persistence for this.
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As it is build the rule now the rollers go up immediately as the wind starts because the average ‘since now minus seconds’ is always higher than my trigger.
The sensor is updated every change it would be even every second and I woul like to get the average once the sensor is updatedfor the 10 seconds after.
Doesn’t work means that if change in the rule with the avarage ‘since now plus x seconds’ nothing happen and my rollers don’t go up at all.
At the end in this way or it go up immediately once the sensor is updated (cause the avarage is obviously higher)or they don’t go up at all.
But there’s is no data in the future. Is your wind sensor psychic and can see the future? That’s what makes no sense. It’s never going to work.
If you have a weather service that reports predicted wind speeds that would be something else, but even there is only going to give you future values on the order of minutes, not seconds. And you can’t use rrd4j for that.
Average since it’s working as expected and designed in this case.
If you need the average for a time period as short as ten seconds, your not going to be able to use average since for this. You’ll have to create a rule that keeps a running average for you or you need to use a time frame of minutes, not seconds.
Finally, you are comparing a number which is what average since returns to a string, which is probably not what you want.
1 Like
Rich thanks but this is not my intention.
My rule’ trigger is the sensor update event and I get the avarage a that time and the x second before where for sure there was no wind because the sensor was sleeping
I want get the average after the updating event.
No in the future.
No prediction. it happens. How long does it last? Is it the case to roll up or that was just a little breeze?
If I can get the avarage and duration my roller can get up if the wind is strong and it last
Hi ,
I think I sorta understood what you are trying to do.
This is a very ugly and not indented or prettified and a simplistic approach mostly just to make it easy to see how you grab 10 values and hold them for use later without having to send to a DB This will take 10 samples of your live windspeed regardless if the wind speed stays at the defined level or even if it goes up or down this will see what happened once every sample interval.
absolutely sure it could be done better and very likely many templates and other examples are much more elegant but it does do exactly what you want.
add this as a inline script to your rule on changed trigger.
If nothing else maybe it gives you some ideas.
var current_windspeed = 1.9; // this would be your item that provides the actual wind speed
var windspeed_too_high = 1; //This sets your wind level to act on so if your first wind speed change is greater or equal to this value then this your monitor will start
var number_of_samples_to_take = 10; //This sets your number of samples if you change greater then 10 you must add samples and if statments to populate them
var sample_count = 0; //this sets your count back to 0 at start of rule run
var windspeed_sample_sum = 0; //this is a sum of all 10 samples
var windspeed_sample_1 = 0; //this is your first live measurement during your 10 second intraval
var windspeed_sample_2 = 0; //this is your second live measurement during your 10 second intraval
var windspeed_sample_3 = 0; //this is your third live measurement during your 10 second intraval
var windspeed_sample_4 = 0; //this is your forth live measurement during your 10 second intraval
var windspeed_sample_5 = 0; //this is your fifth live measurement during your 10 second intraval
var windspeed_sample_6 = 0; //this is your sixth live measurement during your 10 second intraval
var windspeed_sample_7 = 0; //this is your seventh live measurement during your 10 second intraval
var windspeed_sample_8 = 0; //this is your eighth live measurement during your 10 second intraval
var windspeed_sample_9 = 0; //this is your nineth live measurement during your 10 second intraval
var windspeed_sample_10 = 0; //this is your tenth live measurement during your 10 second intraval
var windspeed_monitor_cycle_active = 0; //This sets the state of your monitor you could make this a switch item and when it is on then you could have your rule be blocked from retriggering till it is set to off after sample run is complete
var future_predictor = setInterval(myTimer, 1000); //this is your 1 second timer the 1000 is milliseconds you could change that to a higher of lower value as you see fit
if(current_windspeed >= windspeed_too_high) // this compares your wind speed value based on your first event change and if it the intial wind speed or gust is equal to or greater then the defined value it starts the counter
{
windspeed_monitor_cycle_active = 1;
sample_count = 1;
}
else if(current_windspeed < windspeed_too_high)
{
console.info('windspeed was not high enough to start measurement cycle ' + current_windspeed );
}
function myTimer() // this incremments your sample count based on your intraval.
{
sample_count = sample_count + 1;
if(sample_count == 1)
{
windspeed_sample_1 = current_windspeed;
console.warn('this is windspeed at intraval 1 '+ windspeed_sample_1 );
console.warn('this is sample_count '+ sample_count );
}
if(sample_count == 2)
{
windspeed_sample_2 = current_windspeed;
console.warn('this is windspeed at intraval 2 '+ windspeed_sample_2 );
console.warn('this is sample_count '+ sample_count );
}
if(sample_count == 3)
{
windspeed_sample_3 = current_windspeed;
console.warn('this is windspeed at intraval 3 '+ windspeed_sample_3 );
console.warn('this is sample_count '+ sample_count );
}
if(sample_count == 4)
{
windspeed_sample_4 = current_windspeed;
console.warn('this is windspeed at intraval 4 '+ windspeed_sample_4 );
console.warn('this is sample_count '+ sample_count );
}
if(sample_count == 5)
{
windspeed_sample_5 = current_windspeed;
console.warn('this is windspeed at intraval 5 '+ windspeed_sample_5 );
console.warn('this is sample_count '+ sample_count );
}
if(sample_count == 6)
{
windspeed_sample_6 = current_windspeed;
console.warn('this is windspeed at intraval 6 '+ windspeed_sample_6 );
console.warn('this is sample_count '+ sample_count );
}
if(sample_count == 7)
{
windspeed_sample_7 = current_windspeed;
console.warn('this is windspeed at intraval 7 '+ windspeed_sample_7 );
console.warn('this is sample_count '+ sample_count );
}
if(sample_count == 8)
{
windspeed_sample_8 = current_windspeed;
console.warn('this is windspeed at intraval 8 '+ windspeed_sample_8 );
console.warn('this is sample_count '+ sample_count );
}
if(sample_count == 9)
{
windspeed_sample_9 = current_windspeed;
console.warn('this is windspeed at intraval 9 '+ windspeed_sample_9 );
console.warn('this is sample_count '+ sample_count );
}
if(sample_count == 10)
{
windspeed_sample_10 = current_windspeed;
console.warn('this is windspeed at intraval 10 '+ windspeed_sample_10 );
console.warn('this is sample_count '+ sample_count );
}
if(sample_count == number_of_samples_to_take)
{
clearInterval(future_predictor);
windspeed_monitor_cycle_active = 0;
}
windspeed_sample_sum = (windspeed_sample_1 + windspeed_sample_2 + windspeed_sample_3 + windspeed_sample_4 + windspeed_sample_5
+ windspeed_sample_6 + windspeed_sample_7 + windspeed_sample_8 + windspeed_sample_9 + windspeed_sample_10);
var Wind_10_second_average = (windspeed_sample_sum / number_of_samples_to_take);
console.info('this is sum '+ windspeed_sample_sum );
console.info('this is 10 second average '+ Wind_10_second_average );
console.debug('this is sample_count '+ sample_count );
if(Wind_10_second_average >= windspeed_too_high)
{
console.warn('wind is to high '+ Wind_10_second_average );
// action to close shutter
}
else
{
console.info('wind not high '+ Wind_10_second_average );
//No action required
}
};
hope it helps
Edit I changed this because it was not correctly using interval…
EDIT2 better version in a later post.
@justaoldman 's approach is probably your best bet. If your timelines were in the minutes instead of seconds, @moody_blue 's approach would work.
Here are the problems with using persistence for this.
-
when there is no wind, there is no entries saved to the database at all or, in the case of rrd4j the last reported wind is going to be saved every minute. So if you time is too short to calculate the average you’ll either get the current wind speed or the average of the current wind speed and the last reported wind speed, even if that was hours ago.
-
rrd4j isn’t going to work well with a time in mere seconds anyway, the time bins it’s stores values in are too large
-
values are saved to the database in parallel with the triggering of the rule. It’s unlikely the most recent value that triggered the rule will have actually been saved to the database yet when the rule runs
@justaoldman 's approach could be made simpler by using a running average so you don’t need all those Items. But either way, you’ll need to make sure to account for the zero values when the sensor doesn’t report anything.
Thank you to all for your help.
I’ll try to build my wind trigger rule waiting a second update from sensor in x second before roll the blinds up.
Could be affordable and easier?
Cron strategy with timer?
Either cron or based on events would probably work, but I’m either case you’ll need to handle the fact that your sensor doesn’t report anytime when there is no wind so you’ll have to add something to tell when the wind speed is zero. Maybe expire?
I have just pasted your code as inline script to test it and let you know.
What is supposed to be my sensor trigger based on Item update or change?
And what is the command for action in case of wind too high ?
Thank you
Thank you Rich.
For sure the problem is over my little experience and scripting knowledge.
Hi,
you stated you have a wind speed item if you use a on change event then it will fire the rule.
if the wind speed is greater then whatever you decide is a wind speed too high value it will start sampling the wind speed item every 1 sec for 10 samples. if you create a generic item (switch) that is on off (1 is on 0 is off ) and set a condition on your rule to not run again if the switch is on it will not fire the rule with inline script again if the wind speed onchanged event occurs any more (even if it changed 10 times during those 10 seconds) we only want the rule to run one time during that 10 second interval of sampling. till all 10 sample values are collected and averaged. The wind speed may continue changing during that 10 seconds and your wind speed values may be different for each sample but since each sample is a get of the current wind speed item the script does not care about more on change events till 10 samples of windspeed are collected. once the 10 samples are complete it will set the (generic switch back to off ) and it resets for next event cycle. The reason I chose to set 10 separate items to collect is if during that 10 seconds if one value does go to 0 then the math will still add value of 0 plus any other number values so the math function remains valid. I did average after 10 samples too avoid a 0 value because well average is a division math function and would blow up because you cannot divide by zero. since we know the first sample will be some number value greater then 0 because you would not want it to trigger for “no wind” then we know the final sum no matter what will be some thing more then 0 and the average will work fine.
The command for action would be what every item you have that “closes the roll shutter”.
edit: Also reason I say used on changed is if you have a windspeed that is fluctuating between .2 and .8 and you wind_too_high is set at .9 then you will check for each change to see if wind speed is picking up. but not start collecting samples till your current_windspeed is equal to or greater then your_wind_too_high value. this may cause the rule to kick off more often but since very first check is the compare it will exit very quickly and should not be too expensive. You should also add another condition to only allow the rule to run if the roller shutter is in open state as well. This would prevent the rule from running anytime roller shutter is already closed.
Hi thank you for the explanation.
It is all clear now
I have do edit in your code where you comment with
//action to close shutter
send.command?
I don’t have any experience at scripting.
yes some like
items.getItem('your item name').sendCommand('whatever the valid command is');
you can also change all the console.warn or console.info to console.debug once you are ok and reduce you log entrys. or simply comment them out with 2 forward slashes in front of them like
// console.warn('some comment');
Edit : I updated the original sample I posted as it was not using interval correctly.
Also I tested this more with a item value that changes over the 10 second period and it was not exactly what I expected so this may not pull a new item wind speed value each time due to some other limitations
I will play around with a few other approaches as I have some time and post back.
Thank you indeed
Really appreciate.
I believe it could be useful reduce this interval of 10 second to 5/6 seconds
In this case is it enough to cut the sample lines in your template? Isn it?
yes, all you would need to do is change the value of number_of_samples_to_take to lower number and that is all it will sample.
edit; I updated the script to make it a lot better and insure it actually gets new values for each sample.
Pay close attention to any comments I put in all CAPITAL letters they need you to adjust those values! for your usage. Drop this in your rule as an inline ECMAScript Then area
You can next create a simple generic switch item and name it wind_monitor_active
under your rules use the When and make that your wind speed sensor changed as trigger
under your rules But only if
If wind_monitor_active=OFF
(OPTIONAL) is Add a second But only if
to prevent it running if your roller shutter is already closed
Update the script variables for your wind speed sensor name your roller shutter item Name also you can adjust the interval number and time between samples as you see best I tested many differnt intervals and it seemed to work good with any I tried…
var current_windspeed = items.getItem('Wind_Sensor').numericState; // UPDATE THIS TO YOUR WIND SPEED SENSOR ITEM NAME this would be your item that provides the actual wind speed
var windspeed_too_high = 1.0; //UPDATE THIS TO YOUR MAXIMUM WIND SPEED This sets your wind level to act on so if your first wind speed change is greater or equal to this value then this your monitor will start
var number_of_samples_to_take = 10; //UPDATE THIS TO NUMBER OF SAMPLES TO COLLECT This sets your number of samples if you change greater then 10 you must add samples and if statments to populate them
var interval_time = 1000; // UPDATE THIS TO YOUR DESIRED INTERVAL TIME BETWEEN SAMPLES IN MILLISECONDS. 1000 milliseconds = 1 second. This sets the interval time between samples value MUST be in milliseconds.
var windspeed_sample_sum = 0; //this is a sum of all 10 samples
var windspeed_sample_1 = 0; //this is your first live measurement during your 10 second intraval
var windspeed_sample_2 = 0; //this is your second live measurement during your 10 second intraval
var windspeed_sample_3 = 0; //this is your third live measurement during your 10 second intraval
var windspeed_sample_4 = 0; //this is your forth live measurement during your 10 second intraval
var windspeed_sample_5 = 0; //this is your fifth live measurement during your 10 second intraval
var windspeed_sample_6 = 0; //this is your sixth live measurement during your 10 second intraval
var windspeed_sample_7 = 0; //this is your seventh live measurement during your 10 second intraval
var windspeed_sample_8 = 0; //this is your eighth live measurement during your 10 second intraval
var windspeed_sample_9 = 0; //this is your nineth live measurement during your 10 second intraval
var windspeed_sample_10 = 0; //this is your tenth live measurement during your 10 second intraval
var sample_count = 0; //this sets your count back to 0 at start of rule run
var windspeed_monitor_cycle_active = 0; //This sets the state of your monitor you could make this a switch item and when it is on then you could have your rule be blocked from retriggering till it is set to off after sample run is complete
var wind_speed_average = 0; //this sets your wind speed average back to 0 at start of rule run
var future_predictor = setInterval(MySampleCollector, interval_time); //this is your 1 second timer the interval time "interval_time" is in milliseconds you could change that to a higher of lower value as you see fit with the interval_time varible.
if(current_windspeed >= windspeed_too_high) // this compares your wind speed value based on your first event change and if it the intial wind speed or gust is equal to or greater then the defined value it starts the counter
{
windspeed_monitor_cycle_active = 1; //this sets the monitor cycle to track script is still running
items.getItem('wind_monitor_active').sendCommand('ON'); //UPDATE THIS TO YOUR GENERIC SWITCH ITEM USED TOO BLOCK/UNBLOCK RETRIGGER
sample_count = 0;
console.warn('Wind is too high starting monitor cycle '+'The wind speed is '+current_windspeed);
}
else if(current_windspeed < windspeed_too_high)
{
console.info('windspeed was not high enough to start measurement cycle ' + current_windspeed )
clearInterval(future_predictor);
}
function MySampleCollector()
{
sample_count = sample_count + 1;
if(sample_count == 1)
{
windspeed_sample_1 = items.getItem('Wind_Sensor').numericState; //UPDATE THIS TO YOUR WIND SENSOR ITEM NAME
//windspeed_sample_1 = current_windspeed;
console.debug('this is windspeed at intraval 1 '+ windspeed_sample_1 );
console.debug('this is sample_count '+ sample_count );
}
if(sample_count == 2)
{
windspeed_sample_2 = items.getItem('Wind_Sensor').numericState; //UPDATE THIS TO YOUR WIND SENSOR ITEM NAME
//windspeed_sample_2 = current_windspeed;
console.debug('this is windspeed at intraval 2 '+ windspeed_sample_2 );
console.debug('this is sample_count '+ sample_count );
}
if(sample_count == 3)
{
windspeed_sample_3 = items.getItem('Wind_Sensor').numericState; //UPDATE THIS TO YOUR WIND SENSOR ITEM NAME
//windspeed_sample_3 = current_windspeed;
console.debug('this is windspeed at intraval 3 '+ windspeed_sample_3 );
console.debug('this is sample_count '+ sample_count );
}
if(sample_count == 4)
{
windspeed_sample_4 = items.getItem('Wind_Sensor').numericState; //UPDATE THIS TO YOUR WIND SENSOR ITEM NAME
//windspeed_sample_4 = current_windspeed;
console.debug('this is windspeed at intraval 4 '+ windspeed_sample_4 );
console.debug('this is sample_count '+ sample_count );
}
if(sample_count == 5)
{
windspeed_sample_5 = items.getItem('Wind_Sensor').numericState; //UPDATE THIS TO YOUR WIND SENSOR ITEM NAME
//windspeed_sample_5 = current_windspeed;
console.debug('this is windspeed at intraval 5 '+ windspeed_sample_5 );
console.debug('this is sample_count '+ sample_count );
}
if(sample_count == 6)
{
windspeed_sample_6 = items.getItem('Wind_Sensor').numericState; //UPDATE THIS TO YOUR WIND SENSOR ITEM NAME
//windspeed_sample_6 = current_windspeed;
console.debug('this is windspeed at intraval 6 '+ windspeed_sample_6 );
console.debug('this is sample_count '+ sample_count );
}
if(sample_count == 7)
{
windspeed_sample_7 = items.getItem('Wind_Sensor').numericState; //UPDATE THIS TO YOUR WIND SENSOR ITEM NAME
//windspeed_sample_7 = current_windspeed;
console.debug('this is windspeed at intraval 7 '+ windspeed_sample_7 );
console.debug('this is sample_count '+ sample_count );
}
if(sample_count == 8)
{
windspeed_sample_8 = items.getItem('Wind_Sensor').numericState; //UPDATE THIS TO YOUR WIND SENSOR ITEM NAME
//windspeed_sample_8 = current_windspeed;
console.debug('this is windspeed at intraval 8 '+ windspeed_sample_8 );
console.debug('this is sample_count '+ sample_count );
}
if(sample_count == 9)
{
windspeed_sample_9 = items.getItem('Wind_Sensor').numericState; //UPDATE THIS TO YOUR WIND SENSOR ITEM NAME
//windspeed_sample_9 = current_windspeed;
console.debug('this is windspeed at intraval 9 '+ windspeed_sample_9 );
console.debug('this is sample_count '+ sample_count );
}
if(sample_count == 10)
{
windspeed_sample_10 = items.getItem('Wind_Sensor').numericState; //UPDATE THIS TO YOUR WIND SENSOR ITEM NAME
//windspeed_sample_10 = current_windspeed;
console.debug('this is windspeed at intraval 10 '+ windspeed_sample_10 );
console.debug('this is sample_count '+ sample_count );
}
if(windspeed_monitor_cycle_active = 1)
{
//you can uncomment use this as a way to show like maybe a change a icon or card background a switch state on your UI while monitor is running
//items.GetItem('My_Generic_Switch').sendCommand('ON');
}
if(sample_count == number_of_samples_to_take)
{
console.debug('This is sample_count value = '+ sample_count +' This is number of samples to take value = '+ number_of_samples_to_take );
clearInterval(future_predictor);
windspeed_monitor_cycle_active = 0;
items.getItem('wind_monitor_active').sendCommand('OFF'); //UPDATE THIS TO YOUR GENERIC SWITCH ITEM USED TOO BLOCK/UNBLOCK RETRIGGER
Do_all_math_and_control_shutter();
}
};
function Do_all_math_and_control_shutter()
{
windspeed_sample_sum = (windspeed_sample_1 + windspeed_sample_2 + windspeed_sample_3 + windspeed_sample_4 + windspeed_sample_5
+ windspeed_sample_6 + windspeed_sample_7 + windspeed_sample_8 + windspeed_sample_9 + windspeed_sample_10);
//var Wind_10_second_average = (windspeed_sample_sum / number_of_samples_to_take);
wind_speed_average= (windspeed_sample_sum / number_of_samples_to_take);
if(wind_speed_average >= windspeed_too_high)
{
console.warn('wind is too high closing shutter '+ 'Wind speed average is '+ wind_speed_average );
items.getItem('Test_Roller_Shutter').sendCommand('0'); //UPDATE THIS TO YOUR ROLLER SHUTTER CONTROL
// action to close shutter
}
else
{
console.info('wind is not high '+ 'Wind speed average is '+ wind_speed_average );
//No action required
}
console.debug('this is sum '+ windspeed_sample_sum );
console.debug('this is '+number_of_samples_to_take+' second average '+ wind_speed_average );
console.debug('this is sample_count '+ sample_count );
sample_count = 0;
}
hope it helps and you enjoy.
Thank you indeed Justaoldman. It works like a charm!!!
Masterpiece!
It would be useful to roll up 30% if this wind average is grater than a value. (14km/h) and to roll up completely if the average is grater than an higher value (20 km/h)
But I can confirm that iy works perfectly now.
Many thanks
Hi, glad it works for you.
You could try something like
below this line
var windspeed_too_high = 1; //UPDATE THIS TO YOUR MAXIMUM WIND SPEED This sets your wind level to act on so if your first wind speed change is greater or equal to this value then this your monitor will start
add this new line
var windspeed_super_high = 2; //UPDATE THIS FOR YOUR SUPER HIGH WIND VALUE
then below the last close bracket “}” of this if statement else leg.
if(wind_speed_average >= windspeed_too_high)
{
console.warn('wind is too high closing shutter '+ 'Wind speed average is '+ wind_speed_average );
items.getItem('Test_Roller_Shutter').sendCommand('30'); //UPDATE THIS TO YOUR ROLLER SHUTTER CONTROL
// action to partly close shutter to specific position
}
else
{
console.info('wind is not high '+ 'Wind speed average is '+ wind_speed_average );
//No action required
}
add this new if statement
if(wind_speed_average >= windspeed_super_high)
{
items.getItem('Test_Roller_Shutter').sendCommand('0'); //UPDATE THIS TO YOUR ROLLER SHUTTER CONTROL
console.warn('wind is super high fully closing shutter '+ 'Wind speed average is '+ wind_speed_average );
// action to fully close shutter to specific position
}
that should work to give you two different thresholds to compare.
Edit forgot the console log statement on new action updated it.
Thank you again Justanoldman.
I can confirm it works perfectly and do exactly what I wanted.
Reading your script to learn something I would ask how you ensure when the math avarage after the cicle is higher then windspeed_super_high that also action for windspeed_too_high would be triggered
Cheers