Stack Overflow
Stack Overflow

Questions tagged [node-red]

Node-RED is a data-flow programming tool for wiring together hardware devices, APIs and online services in new and interesting ways.

Node-RED provides a browser-based flow editor to wire together flows using the wide range of nodes in the palette. A built-in library allows you to save useful functions, templates or flows for re-use.

The light-weight runtime is built on Node.js, and utilizes its event-driven, non-blocking model. This makes it ideal to run at the edge of the network on low-cost hardware such as the Raspberry Pi as well as in the cloud.

Problems that may require back and forth debugging may be better asked on the mailing list.

Official Website

Forum

GitHub

Library

Documentation

2181 questions
0
votes
1 answer

Cloudant search query not returning expected result

I'm using Cloudant and I created a search index. However, I'd like the index to return the term I'm querying. I mean I want to get a data which has a specific date that I chose. 1.) I have created a cloudant database and loaded it with some data.…
emily.mi
  • 161
  • 12
0
votes
1 answer

Convert 3 output to one input at NODE-RED

Question is about Node-RED for raspberry pi 3. I have 3 input that give acceleration of X,Y,Z axis. I want to make one output from these 3 inputs. For this , I use √X^2+Y^2+Z^2 formula. According to my function my output is still 3 piece and giving…
Mehmet Ali Küçük
  • 11
  • 6
0
votes
1 answer

Watson IOT Out node on Raspberry Pi repeatedly disconnecting

I am using a Watson IOT Output (wiotp out) in a Node-RED flow on my Raspberry PI and am having issues with the connection repeatedly disconnecting and then re-connecting. Here is a screenshot of my Credentials Node and one of my IOT Out Node. The…
wfc0003
  • 13
  • 4
0
votes
0 answers

node-red: multi users dashboard + node-red-contrib-users

I'm trying to use node-red to create a multi-user dashboard, the idea is that the dashboard has different session, each for a different user. A user must be identificated by the system and can't reach the dashboard resources of another user. I find…
Gianluca Petralia
  • 3
  • 1
  • 5
0
votes
2 answers

How to pass CTRL+C to Raspberry Pi terminal from Node-RED?

I am creating a tutorial for visiting high school students. Using Node-RED I have a Raspberry Pi that runs a script written in python. I am looking to end the python script from node-RED by passing a keyboardInterrupt (CTRL+C) so that the script…
Nile Ellis
  • 13
  • 7
0
votes
1 answer

no node generated in node-red

I try to solve the issue presented in Node-red: custom nodes waiting for missing types by creating a new node. I try to use the "mqtt.js example" to obtain a pre-configured mqtt-client/subscriber to add in my palette. So in the node folder I have…
Gianluca Petralia
  • 3
  • 1
  • 5
0
votes
1 answer

unable to find my custom node on node-red

I am new to node-red. I have created my custom node and published on "npm registry". I can able to install it using npm command but i am not able to find in "Node-red". please help how to enable it on node-red manage pallet.
Vinod Poorma
  • 419
  • 1
  • 6
  • 15
0
votes
2 answers

NodeRed crashes when trying to connect to Azure IoT Hub

I have tried to deploy the very simple node-red flow to send a message using MQTT to Azure. Unfortunately it crashes node-red every time. I'm running NodeRed on a Raspberry Pi 3: 16 May 11:29:19 - [info] Node-RED version: v0.18.4 16 May 11:29:19 -…
Niklas Buhl
  • 1
  • 2
0
votes
1 answer

node-red ReferenceError: la is not defined (line 1, col 8)

How can i send variables form function to function
lalalala589
  • 3
  • 1
  • 2
0
votes
1 answer

Node Red UI - How to get logged user name?

I want to save the logged user name of Node Red UI in database. I get some inspiration from here https://nodered.org/docs/configuration and implemented the user authentication for Node red editor and node red ui as well and its working fine. Node…
Vignesh Ravi
  • 49
  • 7
0
votes
1 answer

node-red / function to calculate and return number

battling with what i think must be a trivial thing (and thus my trivial mistake - i m still new to node-red): in node-red, trying to have a simple function to put payload such as [ 250, 8 ] into an array, perform a simple calculation, and return a…
less.sebastian
  • 3
  • 1
  • 2
0
votes
0 answers

Using ag-grid for tabular display

I want to use ag-grid to display incoming data as a table and also provide an option to export as CSV. I used the reference from here and here to insert code into the template node. This is my template code:
cogitoergosum
  • 2,309
  • 4
  • 38
  • 62
0
votes
1 answer

IBM Cloud Node-RED Manage Palette doesn't install items

I'm on IBM Cloud trying to install node-red-node-smooth from the manage palette, and I'm getting an error. I've tried several other packages as well. The error that I get in my debug log shows: npm WARN saveError ENOENT: no such file or directory,…
Ronald Bower
  • 99
  • 9
0
votes
1 answer

find the mongodb document if a key-value paired is matched from nested document using node red function node

i have a mongodb collection named "Device_Records", using node-red i would like to extract all the documents that satisfy a mongo query.Till now i used mongodb node , drag and drop the mongo node and select "find" from the operation selector. But…
Lisa
  • 655
  • 3
  • 10
  • 34
0
votes
1 answer

how to make script recognize scope in template node-red?

i have this code in node-red.i want to add template node to it. i think the script does not know what the scope is.when i log a value by jquery it returns null.and i get this error:can not read property innerhtml of null.and i log the scope and all…
shahrzad
  • 5
  • 4
1 2 3
…
99
100