Hello every body how can I draw data in node red chart and gauge from api http link that contained data updated every several seconds .which node red icons used for this scenario

Welcome to the forum @Maf . Before you start, I recommend watching this playlist: Node-RED Essentials . The videos are done by the developers of node-red. They're nice & short and to the point. You will understand a whole lot more in about 1 hour. A small investment for a lot of gain. Then, if you s…

Thank you, I'll watch them ,although I draw a figure using node (http request with choose jason parse ,to gauge and chart ,pay load msg ) but the chart and gauge has no data drawn. hint the api link has data like channel of asksensors

After you have watched the videos add debug nodes after each node in your flow and work out where it is going wrong. If you think everything looks right then show us what you are sending to the gauge. Start with the gauge because that is simpler than the chart.

Thanks I'll try .do you mean connect the output or the input of each node in the flow by debug.Can I leave the input of http request without connection

Add the debug nodes where you need them to see where the flow is going wrong. After you have watched the videos also read carefully the node red docs page Working with Messages.

Thank you for your response The issue is look like as in this ticket [image] Thingspeak data to node-red General I have data in thingspeak but unsure how do i send it to node-red. here is the feed link and data format. https://api.thingspeak.com/channels/782876/feeds.js…

You need to do some data manipulation before you pass it to a dashboard chart/gauge node. You cannot just pipe data from HTTP response into a dashboard node. It needs to know what to display. Assuming you are using the chart node with line graph, pass in a single data item and assign a topic for …

[image] Maf: The issue is look like as in this ticket Are you using thingspeak?

[image] Achronite: Assuming you are using the chart node with line graph, It is due to the additional complexity of the chart node that I suggested getting it going with the gauge first.

Gauge operates on a single numeric value, here is one of mine for reference: [image] msg.payload MUST be an number for this to work, you can see this in the right column.

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Drawing live data

Dashboard

Maf 10 March 2021 10:24 7

Thank you for your response
The issue is look like as in this ticket

Topic		Replies	Views
Line chart not working :'( Dashboard node-red-dashboard	18	1413	16 October 2021
Read data from http link Dashboard	3	753	22 May 2018
How to display JSON Data in a Gauge? Dashboard	10	322	7 May 2025
New To Node Red - Trying to educate myself General	12	864	24 January 2022
Charts in node-red with data from mysql database Dashboard	19	11323	11 March 2022

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Drawing live data

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