# Multiple lines on a single chart
**URL:** https://discourse.nodered.org/t/multiple-lines-on-a-single-chart/58104
**Category:** Dashboard
**Created:** [10 February 2022 20:43 UTC](https://discourse.nodered.org/t/multiple-lines-on-a-single-chart/58104 "2022-02-10T20:43:33Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@ALOKA1432](https://discourse.nodered.org/u/ALOKA1432)
#### Post date: [10 February 2022 20:43 UTC](https://discourse.nodered.org/t/multiple-lines-on-a-single-chart/58104/1 "2022-02-10T20:43:33Z")
Hi everyone, I have four HTTP IN nodes defined in a flow. They all receive information from four devices through HTTP GET request.
The HTTP INs are /Device1, /Device2, /Device3, /Device4
Now I want to show all the data on a single chart irrespective of time of receiving of data from 4 different devices.
How do I proceed ?
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### Author:  [@E1cid](https://discourse.nodered.org/u/E1cid)
#### Post date: [10 February 2022 21:04 UTC](https://discourse.nodered.org/t/multiple-lines-on-a-single-chart/58104/2 "2022-02-10T21:04:20Z")
I am assuming the data are single point data values, if so just give each device a unique msg.topic and feed them into the chart node.
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [10 February 2022 21:04 UTC](https://discourse.nodered.org/t/multiple-lines-on-a-single-chart/58104/3 "2022-02-10T21:04:34Z")
If I understand the question you just feed all the values in separately with different topics. The chart will draw a line for each topic.
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### Author:  [@ALOKA1432](https://discourse.nodered.org/u/ALOKA1432)
#### Post date: [10 February 2022 21:12 UTC](https://discourse.nodered.org/t/multiple-lines-on-a-single-chart/58104/4 "2022-02-10T21:12:26Z")
hi @Colin,
i have taken written the function node like this;
msg.payload = [{
"series": ["ULS1","ULS2","ULS3","ULS4"],
"data": [[msg.payload.level1],[msg.payload.level2],[msg.payload.level3],[msg.payload.level4]],
"labels": ["Jan","Jan","Jan","jan"]
}]
return msg;
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [10 February 2022 21:27 UTC](https://discourse.nodered.org/t/multiple-lines-on-a-single-chart/58104/5 "2022-02-10T21:27:33Z")
Do the values that come in via the http nodes each reflect the current value of a single mearurement in the outside world? If not then you need to tell us more about exactly what you are getting via the http nodes.
If they do each represent a single measurement then you don't need to join them into one message. Just feed each one into the chart in the payload with a topic that identifies that measurement. That is all you need.
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### Author:  [@ALOKA1432](https://discourse.nodered.org/u/ALOKA1432)
#### Post date: [10 February 2022 21:33 UTC](https://discourse.nodered.org/t/multiple-lines-on-a-single-chart/58104/6 "2022-02-10T21:33:42Z")
@Colin I just did using different topics and it worked like a charm.
Thanks everyone.
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [24 February 2022 21:34 UTC](https://discourse.nodered.org/t/multiple-lines-on-a-single-chart/58104/7 "2022-02-24T21:34:32Z")
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