# Restore Chart data after power outage

**URL:** <https://discourse.nodered.org/t/restore-chart-data-after-power-outage/29159>\
**Category:** Dashboard\
**Created:** [29 June 2020 10:37 UTC](https://discourse.nodered.org/t/restore-chart-data-after-power-outage/29159 "2020-06-29T10:37:50Z")\
**Posts on this page:** 1\
**Showing post:** 16

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**Author:** ![Ki-va](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ki-va/32/22283_2.png) [@Ki-va](https://discourse.nodered.org/u/Ki-va)\
**Post date:** [30 June 2020 11:06 UTC](https://discourse.nodered.org/t/restore-chart-data-after-power-outage/29159/16 "2020-06-30T11:06:48Z")

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found a solution:  
I've added a switch node after the Chart node and my function node:  
that states if msg.payload is undefined don't save it.

 ![flow](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/1/0/10a5c656480a428877db3f6dcf6ab76583206042.jpeg)  
thank you very much for your help.

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