Display NTP binding to unix timestamp

Setup, Configuration and Use Beginners
1

Hello,
How can I display the timestamp from the NTP binding ?not formatted simply the Unix timestamp.

Thanks

2

Link it to a DateTime type Item, then display or use in a rule the string value of the Item.

if you’re after the Epoch e.g. single integer value, see here -

3

Can you post a sample please?

4

No, I don’t know where you want to use it. In a rule? What language of rule? Log the value? Display in a UI?

5

I want to display it in the ui

6

Have you decided if it is really ‘epoch’ form you are after yet?

If you don’t want to create another Item to hold it as a string, I think you could write a javascript JS transform to use in the DateTime item’s label.
The javascript would get an ISO string like
2018-05-05T05:55:55.000-04:00
which you would need to parse into a javascript object, then get the milliseconds epoch to return to openHAB.
Some ideas here -

7

What is wrong with this transformation?

(function(i) {
    var date = new Date(i); // some mock date
    var response = date.getTime(); 
    return response;
}) (input)

it shows me now


DateTime	date_actualntptimestamp	"Date  [JS(timetotimestamp.js):%s]"	<time>	{channel="ntp:ntp:smarthome:dateTime"}
result:
1.596436653672E12
8

Have you come across “scientific notation” before?
This is just another way to write
1596436653672
which is a milliseconds epoch for
Monday, August 3, 2020 6:37:33.672
Your script gives the right value, but you don’t like the format I guess.

If you want to format your number another way, you should do that in your javascript too. I think maybe a simple .toString() would do it.