# Calling an external service and receiving the Response in a variable? **URL:** \ **Category:** Developers\ **Tags:** app, tools\ **Created:** [April 29, 2019, 4:36pm UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445 "2019-04-29T16:36:27Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![thudelicious](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/thudelicious/32/16721_2.png) [@thudelicious](https://community.homey.app/u/thudelicious)\ **Post date:** [February 6, 2020, 9:07pm UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/21 "2020-02-06T21:07:14Z")
Hi Erik, I am trying to follow your receipt in order to get the hourly forecast from this site: [https://api.met.no/weatherapi/locationforecast/2.0?lat=58.945370&lon=5.573560](https://api.met.no/weatherapi/locationforecast/2.0?lat=58.945370&lon=5.573560) I would like to store all the parameters (i.e air\_temperature, wind\_speed, ) for the next 12 hours in variables for use in other flows. However, I am struggling to get it to work (I am not very experienced with programming unfortunately). Do you have any ideas how I can make it work? How would you store the data in variables for instance? Would you make one air\_temperature variable in better logic for each hour, or is it possible to store all 12 hours in an array? Also, when I try to run I get a flow card error in the second step saying value not found. Can you see what I am doing wrong? Any help would be greatly appreciated 🙂 All the best, Eirik ![Screenshot 2020-02-06 at 22.08.32](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/0/1/01a7f071f34922985a8cb466c37dc691fc02261d.jpeg) ![Screenshot 2020-02-06 at 21.53.44](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/7/6/76da6d42aad581a70b90d63c946dced5f5e2d632.jpeg) ---
**Author:** ![peltsi51](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peltsi51/32/12564_2.png) [@peltsi51](https://community.homey.app/u/peltsi51)\ **Post date:** [February 7, 2020, 6:43am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/22 "2020-02-07T06:43:25Z")
Hi @thudelicious If you like to have the current hour temperature, the JSONpath expression for that is $.properties.timeseries[0].data.instant.details.air\_temperature The next hour is $.properties.timeseries[1].data.instant.details.air\_temperature and so on… There isn’t any array possibility in better logic or Homey variables, so you have to use separate variables. I think in Homey script there are possibility for arrays if you want to dive into that. In [http://jsonpath.com/](http://jsonpath.com/) you can evaluate the JSONpath syntax by copying your source to the page etc. ---
**Author:** ![thudelicious](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/thudelicious/32/16721_2.png) [@thudelicious](https://community.homey.app/u/thudelicious)\ **Post date:** [February 7, 2020, 8:08am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/23 "2020-02-07T08:08:39Z")
I see! Thank you so much. The link was also very useful to check out the syntax 🙂 I still get an error message when trying to test the flow however, but I am guessing that the card needs some sort of input which should be given from the other card. So when I try to test it I have to give it the input ({“a”:1,“b”:“some text”})? What should I put in here in order to test the card? Think I will have to look into Homey Script eventually, but as I just got my homey I think I will start with trying to get a better understanding of the flows first 🙂 Thanks again! ---
**Author:** ![thudelicious](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/thudelicious/32/16721_2.png) [@thudelicious](https://community.homey.app/u/thudelicious)\ **Post date:** [February 7, 2020, 8:20am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/24 "2020-02-07T08:20:55Z")
It seems to be running fine when I checked the variables, so I guess the best way is to verify the JSONpath first. ---
**Author:** ![Philipp\_Karl](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/philipp_karl/32/12702_2.png) [@Philipp\_Karl](https://community.homey.app/u/Philipp_Karl)\ **Post date:** [May 3, 2020, 1:24pm UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/25 "2020-05-03T13:24:02Z")
Hello @Erik, I would like to add a condition to my sprinkler that if the predicted amount of rain from the national weather service is greater than 0, the sprinkler will not start. I have the url for the query to the weather service for the next 5 days: [http://daten.buergernetz.bz.it/services/weather/district/6/bulletin?format=json&lang=de](http://daten.buergernetz.bz.it/services/weather/district/6/bulletin?format=json&lang=de) This is the result, where I need the value marked in yellow: ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/7/d/7d32c9ae605807cc7a72a22fd29fc8a6e6c560c2.png) I created 2 flows, the first calls the weatherdata, the second should write the betterlogic variable: [https://homey.app/f/fBxIq7](https://homey.app/f/fBxIq7) [https://homey.app/f/F9FIq7](https://homey.app/f/F9FIq7) I also created a betterlogic variable: ![Bildschirmfoto 2020-05-03 um 15.20.13](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/3/4/34a5789bc01ec5b4dce64b2c52709ecfa526367d.jpeg) If i try to test the second flow i always get this error: ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/4/0/40e6bc4b2ab49e69d978fed47c0ee8dfe3d15ff1.jpeg) Thanks a lot ---
**Author:** ![Erik](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/erik/32/9865_2.png) [@Erik](https://community.homey.app/u/Erik)\ **Post date:** [May 3, 2020, 1:45pm UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/26 "2020-05-03T13:45:21Z")
Tip: test your expression with [jsonpath.com](http://jsonpath.com) With `$.forecasts[0].rainTo` it should take the rainTo value of the first forecast in the dataset. ---
**Author:** ![Philipp\_Karl](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/philipp_karl/32/12702_2.png) [@Philipp\_Karl](https://community.homey.app/u/Philipp_Karl)\ **Post date:** [May 3, 2020, 2:02pm UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/27 "2020-05-03T14:02:39Z")
i’m getting this error? ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/2/6/26a15c63d6530dd797ad8d50a104a38cac891a32.png) thanks ---
**Author:** ![JPe4619](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jpe4619/32/9017_2.png) [@JPe4619](https://community.homey.app/u/JPe4619)\ **Post date:** [May 3, 2020, 5:30pm UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/28 "2020-05-03T17:30:05Z")
This is not an Error, this is a Test command. ---
**Author:** ![Philipp\_Karl](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/philipp_karl/32/12702_2.png) [@Philipp\_Karl](https://community.homey.app/u/Philipp_Karl)\ **Post date:** [May 3, 2020, 6:52pm UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/29 "2020-05-03T18:52:17Z")
Hello @erik, thanks ist works. could you help me to extract the variable in yellow? ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/c/1/c1b576da331013025f3fda73ef6070c310816e41.png) Thanks a lot ---
**Author:** ![Philipp\_Karl](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/philipp_karl/32/12702_2.png) [@Philipp\_Karl](https://community.homey.app/u/Philipp_Karl)\ **Post date:** [May 3, 2020, 6:56pm UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/30 "2020-05-03T18:56:15Z")
Hello, how can i visualize the extracted variabale to controll if the variable is right? is there any other way instead of using betterlogic, there are now the logics of homey, i always use them and want to continue using them? @Erik : do you think to realize this in your app fĂĽr http requests? thanks ---
**Author:** ![Philipp\_Karl](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/philipp_karl/32/12702_2.png) [@Philipp\_Karl](https://community.homey.app/u/Philipp_Karl)\ **Post date:** [May 3, 2020, 8:23pm UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/31 "2020-05-03T20:23:50Z")
hello, for what can i use this? what is trigger for T80? ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/c/e/ced1b7cac1b8a4da20ab9c5ed36f6a9a1365e63e.png) thanks ---
**Author:** ![Erik](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/erik/32/9865_2.png) [@Erik](https://community.homey.app/u/Erik)\ **Post date:** [May 4, 2020, 6:33am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/32 "2020-05-04T06:33:06Z")
That would be `$.forecasts[0].symbol.description` (agian, its easy to check you jsonpath expression on [jsonpath.com](http://jsonpath.com)) ---
**Author:** ![Erik](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/erik/32/9865_2.png) [@Erik](https://community.homey.app/u/Erik)\ **Post date:** [May 4, 2020, 6:34am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/33 "2020-05-04T06:34:19Z")
I tried to implement native homey variables, but the App toolkit didn’t allowed it (at least it wasn’t a year ago) ---
**Author:** ![Philipp\_Karl](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/philipp_karl/32/12702_2.png) [@Philipp\_Karl](https://community.homey.app/u/Philipp_Karl)\ **Post date:** [May 4, 2020, 7:01am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/34 "2020-05-04T07:01:14Z")
maybe you could retry? 🙂 ---
**Author:** ![Erik](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/erik/32/9865_2.png) [@Erik](https://community.homey.app/u/Erik)\ **Post date:** [May 4, 2020, 8:13am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/35 "2020-05-04T08:13:25Z")
Unfortunantly nothing has changed, so its still not possible to retreive and set native variables from an app. ([https://github.com/athombv/homey-apps-sdk-issues/issues/27](https://github.com/athombv/homey-apps-sdk-issues/issues/27)) ---
**Author:** ![Philipp\_Karl](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/philipp_karl/32/12702_2.png) [@Philipp\_Karl](https://community.homey.app/u/Philipp_Karl)\ **Post date:** [May 4, 2020, 8:33am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/36 "2020-05-04T08:33:31Z")
hello @Erik, if i use the JSONpath for trigger ist possbile to eliminate the betterlogic an wrtite in the standard logics from homey? What ist the trigger for T80? ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/b/5/b5c4dc71bb78c5fa679363179433b74db23d5c94.png) thanks a lot and fpr your patience 🙂 ---
**Author:** ![Philipp\_Karl](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/philipp_karl/32/12702_2.png) [@Philipp\_Karl](https://community.homey.app/u/Philipp_Karl)\ **Post date:** [May 4, 2020, 9:28am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/37 "2020-05-04T09:28:46Z")
@Erik or with this variable? Could this be a solution? I don’t know how to realise that: [https://homey.app/f/kyw0v7](https://homey.app/f/kyw0v7) Thanks ---
**Author:** ![Erik](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/erik/32/9865_2.png) [@Erik](https://community.homey.app/u/Erik)\ **Post date:** [May 4, 2020, 9:43am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/38 "2020-05-04T09:43:37Z")
Looks like the existing condition card _C22_ > Extract and check a specific value from a JSON or XML formatted GET response. This card expects a JSONpath expression. ---
**Author:** ![Philipp\_Karl](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/philipp_karl/32/12702_2.png) [@Philipp\_Karl](https://community.homey.app/u/Philipp_Karl)\ **Post date:** [May 4, 2020, 9:59am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/39 "2020-05-04T09:59:40Z")
could you help me to test this, i’m not able to isner the correct expressions? ---
**Author:** ![Erik](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/erik/32/9865_2.png) [@Erik](https://community.homey.app/u/Erik)\ **Post date:** [May 4, 2020, 10:39am UTC](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445/40 "2020-05-04T10:39:24Z")
What is the exact condition you want to evaluate? [Previous page](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445.md?page=1) [Next page](https://community.homey.app/t/calling-an-external-service-and-receiving-the-response-in-a-variable/12445.md?page=3)