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For questions related to Node-RED, a programming tool used in the Internet of Things based on Node.js.

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How can I set up IoT Platform for experimenting for the students? [closed]

I want to set up a virtual lab where students should be able to login and get access to an instance to the development platform to write code for web development(For example in HTML, Express JS etc), ...
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node-red - Metrics display with pm2?

The Node-RED documentation is clear - set metrics to true to track flow execution and memory usage information. So, I stopped Node-RED with pm2, edited the settings.js file and started Node-RED. But, ...
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Dashboard of historical data in iot_datasourse

I have historical data stored in an SQL database as date in the format (2017.10.27 12:00:25) and the corresponding temperature in the format (26.55). I am using the node iot_datasourse to show the ...
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1answer
61 views

node-red - node.error does not stop flow sometimes

I think, node.error does not halt the flow in all cases. My aim is to catch errors, save the payload and stop the flow. Please refer the observations and experiments below. Observation Function ...
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1answer
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node-red - Units of work

I have a MQTT Input node that kicks of database operations (SELECT and INSERT) for PostgreSQL database. The database operations are done with node-contrib-postgres-multi.Since these operations are ...
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1answer
227 views

How to add payload to a posted MQTT topic?

I am experimenting with node-red, connecting it to my MQTT broker. The input (listening to a topic) works fine. I also would like to send to a topic some payload ipon some triggers. In the example ...
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Does Node-Red support multi-request flows (i.e. sessions)?

I gave Node-Red a short test-run this week. It is not clear to me whether it supports flows that encompass more than one request. Does Node-Red have a request-per-flow or a session-per-flow model? ...