10 second timer tag

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1

I have a boolean tag that when false, I want to run another script that executes periodically that verifies that the first tag should actually be false and if not sets it true.

I was originally using dateExtract(now(),'second')%10=0 && {[.]bool1/Value}=False, which mostly works, except that until the first 10 second multiple is reached, the trigger could occur anywhere from 0 to 10 seconds, and afterwards would indeed be every 10 seconds.

My second attempt was
toInt(dateDiff({[.]enableCancel/Value.Timestamp}, now(),'second'))%10=0 && {[.]bool1/Value}=False

I like this idea better since it executes every 10 seconds since the event started, except this triggers immediately as the initial dateDiff is 0.

Any suggestions? I would like to keep to tag(s) and not use a gateway timer script.

2

Ok I just added a check for dateDiff to not be 0, so lol yeah.

3

I'm not sure why you wouldn't want to use a gateway timer script, but you can make a 10 second flasher like this

toMillis(now(10000)) % 20000 > 10000
4

I have a similar question to OP... I have a tag right now (Memory tag of type String) that holds a message to display to the user. The reason why it's in a tag is because I read/write to it from the UI and from tag change scripts, so I needed something globally scoped. It probably isn't the best way to accomplish this, but it works.

I would like to reset the tag after 10 seconds or so, so that users don't get confused whether a message they're seeing is current or stale.

I would also really try to avoid using a time.sleep or some similar mechanism, but I can't come up with a way to accomplish this.

I was thinking to use a tag group that reads every 10 seconds indefinitely, but it doesn't give me what I want (namely, the 10 second timer to start when the message tag gets populated, not just a cyclic 10 seconds).

Do you have an idea of how to accomplish this?

5

Use a second tag that looks at the timestamp of the message tag and compare that to now() if the len of the message is greater than zero.

2 Likes
6

Getting back into this project and wanted to make sure I understand you... You're saying that two tags is all I'll need (say, statusMsg and statusMsgTs)?

I have a setup like this right now, with statusMsg being a String memory tag and statusMsgTs being a Boolean Expression tag. On the expression, I have something like this:

if(
    secondsBetween(now(0), {[.]statusMsg.Timestamp}) > 10 
        && len({[.]statusMsg}) > 0, 
    true, 
    false
)

What isn't super clear is the third step that would clear the tag. The most obvious method would be to have a gateway tag change script that would reset the statusMsgTs back to false and clear the statusMsg tag. Is there something else you had in mind?

7

Make your expression tag hold either the status string or the empty string, then point your display to the expression tag.

if(
    secondsBetween(now(), {[.]statusMsg.Timestamp}) > 10,
    '', 
    {[.]statusMsg}
)
1 Like
8

Perfect, that is what I was looking for. The only thing I added was to wrap the secondsBetween call in abs, as I was initially confused why the tag wasn't clearing. This can also be done by swapping the order of the parameters in that expression function, but I might reuse this setup elsewhere, so it will be good to have generalizable (future and past times).

Thank you again.