OpenWeatherMap - formatting datas

[Werner Girlich]

I am able to extract any datas from OWM to make them visible in my UI - that's not the issue. I have problems in formatting that datas:

Code msg.payload : array[40]array[40]

[0 … 9]

0: object

dt: 1522422000

main: object

temp: 12.8

temp_min: 11.63

temp_max: 12.8

pressure: 1002.28

sea_level: 1012.31

grnd_level: 1002.28

humidity: 86

temp_kf: 1.17

weather: array[1]

clouds: object

wind: object

rain: object

sys: object

dt_txt: "2018-03-30 15:00:00"

I my template node I just want to use the icon, the temperature value and the date - but temperature only rounded in an absolute value and the timestamp only in 'hh:mm'.

<div style="display: flex;height: 100%;justify-content: center;align-items: center;">
<i class="fa-2x wi wi-owm-{{msg.payload[5].weather[0].icon}}"></i>
</div>
<div ng-bind-html="msg.payload[5].main.temp"></div>
<div ng-bind-html="msg.payload[5].dt_txt"></div>

 Any help is welcome!

[Mark Setrem]

use a function node and https://stackoverflow.com/questions/11832914/round-to-at-most-2-decimal-places-only-if-necessary

[Werner Girlich]

Didn't know that this can lead to an endless discussion there at stackoverflow...  For my little application the

'.toFixed(0)'-appendix is fully OK and works fine. Thanks for your advice.

Is anybody here to help in deleting the 'date'-information out of the timestamp?

[Mark Setrem]

i’m sure if you google formatting date javascript you’ll find a stack page that will help you

[Werner Girlich]

I tried, but I fail in extracting hh:mm even from a text-formatted or ISO-formatted input to place the javascript into a function node. Haven't found any help yet.

[Colin Law]

Are you trying to extract the time out of dt_text as shown in your first post?  If so you can use substring [1]

Colin

[1] https://www.w3schools.com/jsref/jsref_substring.asp

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[Matha Goram]

Hello Werner,

Your note (using OpenWeatherMap) caught my eye while I was searching for some guidance on the Notification widget of the Dashboard!

Here is my function to reformat the datetime stamp returned by OpenWeatherMap:

// convert Unix timestamp to local time in readable format
function riseset(timestamp)
{
    var myLocale = "en-US"; // bn-IN, hi-IN, ur-IN
    var myOptions = {weekday: "long", year: "numeric", month: "numeric",
        day: "numeric"};
    var d = new Date(timestamp * 1.e3);
    return d.toLocaleTimeString(myLocale, myOptions);
}

It is working under Chromium on RPi Stretch (current).

Regards.

[Werner Girlich]

Hi Colin, Martha, thanks for your inputs. For sure you both have the right approach - but I fail in converting the scripts in a function node. I am a beginner in NodeRED. Nevertheless, string manipulation gave me the idea to search for a particular node, and I found 'node-red-contrib-string'. Great, with this node I was able to solve my little problem. Again thanks and have a nice Easter!