Monitor status variations

[scanch]

Hello,
I have an item that performs check on a tcp port and returns two values (0 or 1). I want to configure a trigger for monitoring only status variations for one day (0->1 and 1->0). If I have more than 10 changes in the day, trigger will be activated. After reading the trigger documentation, I doesn't found any function that deal with my requirements
I have tried with average functions, count, ... But it doesn't make the job.
Is there a way to do it?
Thanks,

[[email protected]]

Make a calculated item and use diff function.
This calculated item should de evaluated with the same frequency as the item that performs the tcp check.
If the value of the calculated item = 1, then there is a change in the port status.
Now you can make a trigger and use sum-function:
sum(calcitem,24*3600)>10

[scanch]

Thanks for the tip !