node-red

问题 I am a beginner in using Node-RED in Bluemix. I am trying to analyse the tweets along with sentiment analysis using sentiment node. Do we have an option to pass the tweet search keyword as a parameter? Also can we control (start/stop) the flow based on tweet count (for example I need to do the analysis of 500 tweets only)? I would like to know once the flow is deployed, will the flow start the tweet analysis until the session of the Node-RED flow editor is terminated? 回答1: To answer each of

问题 I'm trying to send a multipart request with the following form-data: ------WebKitFormBoundaryjFqPRXY6RQpdTRvE Content-Disposition: form-data; name="file"; filename="Sample.csv" Content-Type: application/vnd.ms-excel ------WebKitFormBoundaryjFqPRXY6RQpdTRvE Content-Disposition: form-data; name="data"; filename="blob" Content-Type: application/json {"name":"Sample5","type":"Csv","firstRowIsHeader":true,"columns":[{ ... }]} ------WebKitFormBoundaryjFqPRXY6RQpdTRvE-- The above data is normally

问题 I am running node-red on my raspberry pi and am trying to get a node that I wrote myself working on it. The node works fine on my windows PC but I haven't been able to get it working on my pi yet. My node uses mailin to setup an SMTP server but I don't think it's an issue with that package. mailin is trying to create a temporary folder but it obviously doesn't have permissions. How do I give node the permissions it needs to be able to create this folder? full error: 5 Apr 20:06:22 - [info]

问题 I'm trying to works on node-red's websockets on windows environment (I've successfully try on Linux). I've simple apps like pictured below and it's doesn't work output on console : 17 Feb 09:07:04 - [error] [websocket out:c87881cc.37878] TypeError: Cannot read property 'wholemsg' of null node-red json : [{ "id": "50702139.8696e", "type": "websocket-client", "z": "f00fcb86.2de8f8", "path": "/press", "wholemsg": "false" }, { "id": "c87881cc.37878", "type": "websocket out", "z": "f00fcb86.2de8f8

问题 I'm having a custom node which includes two dropdowns which are independent to each other. So the second dropdown values changes, according to the selected value from the first drop down. What I've tried now is: User drags my custom node (iotinput) choses values from both the drop downs and clicks the Done. He drags another custom node (iotinput) again, and select different values and clicks Done. So there're two custom nodes at the moment. So when the user goes back and click in either one

问题 Say there is a 'inject' node that injects a string. This string will consist of '/home/jurgen/Desktop/hello.txt' and will be passed to a 'file in' node. The 'file in' node requires a path to be specified when the 'in file'node is clicked, however I would like to pass the path from the inject node directly. I have tried placing {{payload}} into the 'in file' path parameter but no luck. help. 回答1: The sidebar Info tab contains documentation for each node that describes what message properties

问题 I'm working with node-red , on boilerplate IBM cloud. I know that there is a way, changing the value of enviroments variables(NODE_RED_USERNAME and NODE_RED_PASSWORD), to change username and password of the editor flow. But, what about UI dashboard? I mean using dashboard nodes. Forbid access to https://noderedservicename.mybluemix.net/ui/ I know that on the code, changing the variable httpNodeAuth on the file settings.js I can do what I want. What is the way for doing that on IBM Cloud?

问题 In node-RED, I used 'batcher' node to bring 2 Humidity readings together in a msg, which I want in a json format, to use it downstream, one for inside, there other in a quad. The constructed msg object now looks like this: { "topic": "Hum", "payload": [ { "inside": 29 }, { "quad": 54 } ] } I am trying to get to elements in this object, with: msg.payload.inside But it is not working, how can I get to for instance the inside humidity ? 回答1: The payload property of that object is an Array that

问题 I am using Node-RED on Bluemix, I want to let the user upload a document, here is the relevant code fragment in a function/template of a flow <form action="/upload" method="POST"> <h1>Upload PDF</h1> <input type="file" name="myFile" /> <input type="submit" /> </form> When I run it, I chose a file and press 'submit', but then comes the message Cannot POST /upload Then I went to http://flows.nodered.org/node/node-red-contrib-http-multipart , in the example there it says You can upload to a node

问题 Last week I got to know node-red (what a potential!), and after installing it on a Raspberry Pi B+ and following the basic tutorials, I'm experiencing some issues. When I follow the Inject + Debug node example, wire them, and deploy them, I get the message "Deploy sucessfull". So far so good. I'm running it locally on http:// localhost:1880. Then when I click the Inject node or the Debug node, it says: "Error: Inject node not deployed" or "Error: Debug node not deployed". Anyone know how to