I have in my flow a node which compares the RTC and the RPI clock. It looks for a difference. If it is greater than a set value, it sends a message indicating that. But to check I need to do the check both ways. Have a look at the code and I hope you will see the problem. Basically I have: dif…

That doesn't actually answer the format question. Are you comparing values that are constantly increasing (milllisecs since epoch) or values that reset at midnight everyday (eg 24 hour clock: 235959)

(yeah........ ok.) Line 55: r = Math.abs(a - b); That should work?

Ok, so, the next problem: Alas I have lost a bit of data over the last couple of days because yesterday NR spat the dummy. :frowning: All ok now. But it seems that every midnight it throws up an error and I am not exactly sure why. An error: as in it says there is too much of a time difference…

Show us the exact and full message please

At this point I don't have one. As stated: "NR spat the dummy" and I have to wait - probably 24 hours - to get another report/error on that.

If it was a significant error it should be in syslog

You don't say where you get your clock values or what units they are in. I assume/hope you are using something like milllisecs since epoch (ie, what Date.now() returns).

This is most of the flow that does it. Understand that the inject node is from another thing which is basically a timed pulse happening every 'x' seconds. A sort of heart beat for the entire system. The last function node has 3 outputs. The first one goes to a bit more stuff which looks at the …

It isn't so much an error, but the code I wrote claims there is a problem with the two times it is seeing.

Are you able to answer my question? What is the format of the time values you are comparing?

Maths problem - stuck

General

Trying_to_learn 19 May 2019 07:07 8

There is a signal sent and the "system clock" is read. At the same time the RTC time is read.
They are sent into a function node and the two times compared.

Depending if they are less than the set value different all is good.

I shall hope (weirdly) that I can catch an error tonight and post what I get from it there after.

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Maths problem - stuck

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