# Issue with OpenWeather app? It appears to be returning a Null value for Precipitation **URL:** \ **Category:** Questions & Help\ **Created:** [July 5, 2023, 9:43am UTC](https://community.homey.app/t/issue-with-openweather-app-it-appears-to-be-returning-a-null-value-for-precipitation/83988 "2023-07-05T09:43:55Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![pmeester](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/pmeester/32/17275_2.png) [@pmeester](https://community.homey.app/u/pmeester)\ **Post date:** [July 5, 2023, 9:43am UTC](https://community.homey.app/t/issue-with-openweather-app-it-appears-to-be-returning-a-null-value-for-precipitation/83988/1 "2023-07-05T09:43:55Z")
I have number variable called g\_precipitation\_counter. It starts being 0. Every 15 minutes I add the value for Precipitation from the OpenWeather app to it. ![flow](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/6/c/6c2a6ac1ded0cdb69708efd084456b90dbba2af8.jpeg) However, the value for g\_precipitation\_counter becomes Null and NaN if I turn it into text. Is it something I do wrong, or is the Null value an error from the app? Edit: I since learned that I have to use the double squirly brackets {{}} for calculations. That solved most of the issue. Is there a way to ensure the Precipitation value has a value, before adding it to the counter? Thanks ---
**Author:** ![Sharkys](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sharkys/32/54029_2.png) [@Sharkys](https://community.homey.app/u/Sharkys)\ **Post date:** [July 5, 2023, 10:08am UTC](https://community.homey.app/t/issue-with-openweather-app-it-appears-to-be-returning-a-null-value-for-precipitation/83988/2 "2023-07-05T10:08:01Z")
> [@pmeester](#): > > is the Null value an error from the app? Maybe ask in the Openweather app thread ? But anyway, for my location, it returns the precipitation values correctly (currently 0 - not null). Btw, are you on API3 ? I wonder if you are not calling API too often - check out the API limits - [Weather API - OpenWeatherMap](https://openweathermap.org/api) ---
**Author:** ![RonnyW](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/ronnyw/32/10879_2.png) [@RonnyW](https://community.homey.app/u/RonnyW)\ **Post date:** [July 5, 2023, 10:11am UTC](https://community.homey.app/t/issue-with-openweather-app-it-appears-to-be-returning-a-null-value-for-precipitation/83988/3 "2023-07-05T10:11:21Z")
Don’t you need the typical {{ … }} around the calculation? Else it could result in a concatenated string and that’s not returnable as float. ---
**Author:** ![pmeester](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/pmeester/32/17275_2.png) [@pmeester](https://community.homey.app/u/pmeester)\ **Post date:** [July 5, 2023, 1:07pm UTC](https://community.homey.app/t/issue-with-openweather-app-it-appears-to-be-returning-a-null-value-for-precipitation/83988/4 "2023-07-05T13:07:28Z")
It is less than 100 calls per day, so not too many. Thanks for the idea ---
**Author:** ![pmeester](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/pmeester/32/17275_2.png) [@pmeester](https://community.homey.app/u/pmeester)\ **Post date:** [July 5, 2023, 1:08pm UTC](https://community.homey.app/t/issue-with-openweather-app-it-appears-to-be-returning-a-null-value-for-precipitation/83988/5 "2023-07-05T13:08:10Z")
I’ll try that. Most of the times it already works well though. Thanks! ---
**Author:** ![SingKT](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/singkt/32/173226_2.png) [@SingKT](https://community.homey.app/u/SingKT)\ **Post date:** [July 5, 2023, 1:14pm UTC](https://community.homey.app/t/issue-with-openweather-app-it-appears-to-be-returning-a-null-value-for-precipitation/83988/6 "2023-07-05T13:14:41Z")
Have you done an app restart? ---
**Author:** ![RonnyW](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/ronnyw/32/10879_2.png) [@RonnyW](https://community.homey.app/u/RonnyW)\ **Post date:** [July 5, 2023, 1:40pm UTC](https://community.homey.app/t/issue-with-openweather-app-it-appears-to-be-returning-a-null-value-for-precipitation/83988/7 "2023-07-05T13:40:00Z")
Can you please comment what OWM device you are using? OneCall Current weather? Edit: I’m suure OWM app is correct. The rain should have a valid value in every case (at least 0). And you are not using a standard logic card ![grafik](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/4/8/48e96a9ea2c37a54e3a1e10398b0c752389e6379.png) If you have issues using thsi card, please ask the developer of the app providing this card. ---
**Author:** ![pmeester](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/pmeester/32/17275_2.png) [@pmeester](https://community.homey.app/u/pmeester)\ **Post date:** [August 3, 2023, 8:09pm UTC](https://community.homey.app/t/issue-with-openweather-app-it-appears-to-be-returning-a-null-value-for-precipitation/83988/8 "2023-08-03T20:09:41Z")
It is correct as far as I can see. Very helpful. Thanks ---
**Author:** ![OH2TH](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/oh2th/32/111414_2.png) [@OH2TH](https://community.homey.app/u/OH2TH)\ **Post date:** [November 19, 2024, 10:21am UTC](https://community.homey.app/t/issue-with-openweather-app-it-appears-to-be-returning-a-null-value-for-precipitation/83988/11 "2024-11-19T10:21:53Z")
Closed in favor of application specific topic [[App][Pro] OpenWeather](https://community.homey.app/t/61482)