Trigger Event

[Mauricio]

As we know, dew point temperatures can be used to predict when a severe frost will occur.
Therefore, I need help generating a trigger that will activate an alert indicating the possibility of a severe frost if the wind is =<5 km/h, the air temperature at 6:00 PM is >7.2°C, and the dew point is =< −2.2°C .
Is this possible? What do you think? Thanks!

[davidmc36]

One thing is you can create an email event at that time of day sending those parameters.

What about email "Triggered By Event"?

[Mauricio]

Exactly! if an email can be generated at that time, any idea how can the variable be generated?

[davidmc36]

I only had a quick look at the options under the Services/Events tab. Not sure exactly how to work it up.

[Mauricio]

I have tried it this way and it works!

One - Time Alarm ( It does not allow you to select 18 PM)

Raise: ([th0temp-act=c.1:0] <= 7.2) && ([wind0wind-act=kmh.0:0] <=5) && ([th0dew-act.0:0] <=-2.2)

Clear: ([th0temp-act=c.1:0] >= 10) && ([wind0wind-act=kmh.0:0] >=8.0) && ([th0dew-act.0:0] >= 2)

Subj # Body: Risk of severe frost!!

Thanks

[Mattk]

You should be able to frame a specific time and the other conditions using #if# #then# #else# #fi# and send an email etc?

[Mauricio]

Do you have any ideas on how to do it? I'm already lost there , I don't know how to relate it to the time. Thanks

[davidmc36]

You should be able to frame a specific time and the other conditions using #if# #then# #else# #fi# and send an email etc?

Are you thinking of a virtual sensor with the desired conditions that triggers when all conditions are met and initiates the email?

Or would it all be done on the Event tab?

[Mauricio]

I want to develop it through an event

[Mattk]

On the event tab but thinking some more might not be be an option without being able to nest the expression?

But with the one time alert maybe also able to incorporate the time (just thinking again) but just to clarify does the 6:00 PM only relate to the Temp? Assuming it would be, and wind, and dewp, and Temp all at 6:00 Pm? or No?

[Mauricio]

Exactly the time ( 18 PM) relate it to the 3 parameters

[Mattk]

Then how about setting up an Email event at a Specific Time [18:00] with a Subj# Body something like

Frost Risk @ [[hh]:[mm]##if# {*(Condition1) && (Conditon2) && (Condition3)*} #then# Yes #else# No #fi#

[Mauricio]

Mattk, It's already working perfectly. Your event will help protect our crops from the risk of severe frost; it's excellent. Thank you very much!

[davidmc36]

If I wanted to make an alarm that included Solar Radiation, UV Index, and Sunshine duration, how would you fill in the X's? Especially the watts per sq meter??

[sol0rad-act=x.X:X] <= n.n [uv0index-act=x.X:X] <= n.n [sol0total-act=x.X:X] <= n.n

[Mauricio]

A problem that I have encountered is that every time my device, the trigger, gives the order to reboot daily with http://templates.meteobridge.com/reboot.sh it trigger a rain event (false).






Thanks for any help or ideas on how to fix this.