# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=828

[Latest](https://discourse.nodered.org/latest.md) · [Categories](https://discourse.nodered.org/categories.md) · [Tags](https://discourse.nodered.org/tags.md)

**Page:** 829

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## [Questions \_ acces \_ node red\_ smart phone \_ mobile](https://discourse.nodered.org/t/questions-acces-node-red-smart-phone-mobile/17632)

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**Author:** [@Lyes16](https://discourse.nodered.org/u/Lyes16)\
**Replies:** 11\
**Last updated:** [9 November 2019 22:52 UTC](https://discourse.nodered.org/t/questions-acces-node-red-smart-phone-mobile/17632 "2019-11-09T22:52:22Z")

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Hello everyone I am new user of node-red indeed, I install the interface on PC and I tried to have access to this iterface using my mobile phone. I declared the address of the PC on the browser of the smartphone follo…

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## [How to change the file name in "file node"](https://discourse.nodered.org/t/how-to-change-the-file-name-in-file-node/17351)

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**Author:** [@AK51](https://discourse.nodered.org/u/AK51)\
**Replies:** 2\
**Last updated:** [9 November 2019 17:31 UTC](https://discourse.nodered.org/t/how-to-change-the-file-name-in-file-node/17351 "2019-11-09T17:31:55Z")

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Hi, I can store data in a file, but the file can grow really big as there are lots of data per second. May I store the data in a new file each day using a format like 20191031.txt? Also, is there any function in node r…

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## [MQTT yellow Connecting](https://discourse.nodered.org/t/mqtt-yellow-connecting/17711)

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**Author:** [@JaredG](https://discourse.nodered.org/u/JaredG)\
**Replies:** 3\
**Last updated:** [9 November 2019 17:40 UTC](https://discourse.nodered.org/t/mqtt-yellow-connecting/17711 "2019-11-09T17:40:45Z")

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Hi, I'm a little new to Node-Red so be kind.:slight\_smile: I have a device in Watson IOT that I'm trying to connect my MQTT in/out to. I keep getting "connecting' beside either MQTT in/out node. I have setup another…

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## [Size limit ? of a JSON object ? (Arduino -\> MQTT -\> Node-Red)](https://discourse.nodered.org/t/size-limit-of-a-json-object-arduino-mqtt-node-red/17686)

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**Author:** [@alexandre-romain](https://discourse.nodered.org/u/alexandre-romain)\
**Replies:** 6\
**Last updated:** [9 November 2019 16:34 UTC](https://discourse.nodered.org/t/size-limit-of-a-json-object-arduino-mqtt-node-red/17686 "2019-11-09T16:34:49Z")

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Hi there ! I'm facing a weird problem which I don't understand (well, I'm still some king of a newbee ...). I'm sending a JSON formatted string to a MQTT broker (local, hosted on a Debian Buster server where Node-Red a…

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## [On my Node-RED Project I typed the wrong GIT repository credentials and now it fails but wont ask for new credentials \[SOLVED\]](https://discourse.nodered.org/t/on-my-node-red-project-i-typed-the-wrong-git-repository-credentials-and-now-it-fails-but-wont-ask-for-new-credentials-solved/17618)

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**Author:** [@jtmoderate876](https://discourse.nodered.org/u/jtmoderate876)\
**Replies:** 2\
**Last updated:** [7 November 2019 13:02 UTC](https://discourse.nodered.org/t/on-my-node-red-project-i-typed-the-wrong-git-repository-credentials-and-now-it-fails-but-wont-ask-for-new-credentials-solved/17618 "2019-11-07T13:02:14Z")

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I get authentication failed if I open the log but the Project GUI never asks me for new credentials and I don't know how to flush them. Ideas? \[SOLVED\] Nick's suggestion of restarting node-red worked.

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## [Frequency Meter for displaying fuel totals](https://discourse.nodered.org/t/frequency-meter-for-displaying-fuel-totals/17693)

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**Author:** [@shaynel2006](https://discourse.nodered.org/u/shaynel2006)\
**Replies:** 5\
**Last updated:** [9 November 2019 12:59 UTC](https://discourse.nodered.org/t/frequency-meter-for-displaying-fuel-totals/17693 "2019-11-09T12:59:51Z")

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Hi All, i have a pulse/frequency meter running in node red. I want to setup a page to display the flow rate per litre show how much fuel was used when no flow shows for 1 minute its stores the total. starts again whe…

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## [Postgresql in nodered connection error](https://discourse.nodered.org/t/postgresql-in-nodered-connection-error/17678)

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**Author:** [@pranavthakkar](https://discourse.nodered.org/u/pranavthakkar)\
**Replies:** 9\
**Last updated:** [9 November 2019 12:32 UTC](https://discourse.nodered.org/t/postgresql-in-nodered-connection-error/17678 "2019-11-09T12:32:23Z")

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Hey there!! Greetings I'm using postgresql and also installed the pgadmin3 in Rpi, Now Comes to Node red flows where i can not get the data , which i used to send query. this is format query node: PostGre node: …

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## [Help Please MQTT](https://discourse.nodered.org/t/help-please-mqtt/17682)

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**Author:** [@M-a-r-k](https://discourse.nodered.org/u/M-a-r-k)\
**Replies:** 13\
**Last updated:** [9 November 2019 11:28 UTC](https://discourse.nodered.org/t/help-please-mqtt/17682 "2019-11-09T11:28:57Z")

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Hi, this must be the most easiest ask, i have a mosquitto mqtt broker running in a docker container link to node red, i want to set up a user name and password on the mosquitto broker, I have made the password file, i ca…

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## [I'm looking for help with my project](https://discourse.nodered.org/t/im-looking-for-help-with-my-project/16964)

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**Author:** [@fralac](https://discourse.nodered.org/u/fralac)\
**Replies:** 57\
**Last updated:** [9 November 2019 09:54 UTC](https://discourse.nodered.org/t/im-looking-for-help-with-my-project/16964 "2019-11-09T09:54:20Z")

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Hello everyone. I am an inexperienced boy in node red and I created a led on / off project. I succeeded, without problems, in finishing it. Now I would like to add a timer visible in the interface and manageable by the u…

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## [Pass data between local & remote sites](https://discourse.nodered.org/t/pass-data-between-local-remote-sites/17165)

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**Author:** [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)\
**Replies:** 46\
**Last updated:** [8 November 2019 21:49 UTC](https://discourse.nodered.org/t/pass-data-between-local-remote-sites/17165 "2019-11-08T21:49:19Z")

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I have a MQTT Mosquitto server running on a Raspberry Pi, and it receives local energy data every 5 seconds, along with other MQTT data - switches, environmental data etc. Currently, the same Pi processes the data in no…

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## [Conversion hex to BigInt node red](https://discourse.nodered.org/t/conversion-hex-to-bigint-node-red/17684)

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**Author:** [@Meng](https://discourse.nodered.org/u/Meng)\
**Replies:** 1\
**Last updated:** [8 November 2019 16:42 UTC](https://discourse.nodered.org/t/conversion-hex-to-bigint-node-red/17684 "2019-11-08T16:42:07Z")

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I imported BigInter.js to the functionGlobalContext of node-red, however when I use var maximumByte = BigInt("FF", 16); (for bigInt the function is not known) it gives the following error SyntaxError: Cannot convert F…

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## [UI control can't be triggered at Nodered start](https://discourse.nodered.org/t/ui-control-cant-be-triggered-at-nodered-start/17679)

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**Author:** [@Charlotte](https://discourse.nodered.org/u/Charlotte)\
**Replies:** 1\
**Last updated:** [8 November 2019 14:32 UTC](https://discourse.nodered.org/t/ui-control-cant-be-triggered-at-nodered-start/17679 "2019-11-08T14:32:19Z")

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Hi, I have a dashboard tab where I want to show or hide some groups as soon as Node red start, depending on the content of a file. I'm using UI control for this. I observed that this is working very well if triggered …

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## [Problem with HTTP Request Node](https://discourse.nodered.org/t/problem-with-http-request-node/17680)

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**Author:** [@pcgopher](https://discourse.nodered.org/u/pcgopher)\
**Replies:** 0\
**Last updated:** [8 November 2019 14:24 UTC](https://discourse.nodered.org/t/problem-with-http-request-node/17680 "2019-11-08T14:24:43Z")

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Hello, I'm running Node-RED on a Windows 10 device and set up a flow to control an ADAM relay module from Advantech. I'm using an HTTP Request node to connect to the ADAM module, but I'm not getting back a response. I'v…

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## [Base64 to image](https://discourse.nodered.org/t/base64-to-image/17677)

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**Author:** [@sakshanjsr](https://discourse.nodered.org/u/sakshanjsr)\
**Replies:** 1\
**Last updated:** [8 November 2019 13:00 UTC](https://discourse.nodered.org/t/base64-to-image/17677 "2019-11-08T13:00:04Z")

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I am trying to convert base64 to image and display it on dashboard. But getting the error which says : Error: ENAMETOOLONG: name too long What could be the possible solution for the same?

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## [General Node Red behavior?](https://discourse.nodered.org/t/general-node-red-behavior/17588)

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**Author:** [@NikoG](https://discourse.nodered.org/u/NikoG)\
**Replies:** 5\
**Last updated:** [8 November 2019 10:28 UTC](https://discourse.nodered.org/t/general-node-red-behavior/17588 "2019-11-08T10:28:30Z")

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Hello, I'm currently using Node Red to Create a complex application which involes many seperate Node-Lines in one Flow and the use of many Context Variables. For that I have to understand how Node Red processes a Flow …

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## [Wanted to create database](https://discourse.nodered.org/t/wanted-to-create-database/17591)

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**Author:** [@pranavthakkar](https://discourse.nodered.org/u/pranavthakkar)\
**Replies:** 16\
**Last updated:** [8 November 2019 09:09 UTC](https://discourse.nodered.org/t/wanted-to-create-database/17591 "2019-11-08T09:09:37Z")

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Hi there , I want to dump a data (at this moment single data) (i'm new to database) in mysql or postgresql(which needs lots of work like docker or something) can any one explains how to start with working on database?? …

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## [Starting node-red in debug mode in ubuntu- how to](https://discourse.nodered.org/t/starting-node-red-in-debug-mode-in-ubuntu-how-to/17662)

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**Author:** [@uma](https://discourse.nodered.org/u/uma)\
**Replies:** 2\
**Last updated:** [8 November 2019 09:05 UTC](https://discourse.nodered.org/t/starting-node-red-in-debug-mode-in-ubuntu-how-to/17662 "2019-11-08T09:05:45Z")

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In windows, i would simply add '--inspect' as an argument to node in C:\\Users\<username\>\\AppData\\Roaming\\npm\\node-red.cmd. I am unable to find the shell script in ubuntu- executing 'which node-red' in my ubuntu instance g…

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## [Installing custom nodes from git repo](https://discourse.nodered.org/t/installing-custom-nodes-from-git-repo/17657)

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**Author:** [@sharique.hasan](https://discourse.nodered.org/u/sharique.hasan)\
**Replies:** 2\
**Last updated:** [8 November 2019 07:10 UTC](https://discourse.nodered.org/t/installing-custom-nodes-from-git-repo/17657 "2019-11-08T07:10:20Z")

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we have AI solutions. where we have different nodes involving camera feed and object-detection custom build. So now we need to add them to our node-red instance. I was looking at this API https://nodered.org/docs/api/adm…

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## [Help with my flow: generating an email from array](https://discourse.nodered.org/t/help-with-my-flow-generating-an-email-from-array/17346)

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**Author:** [@lsadow](https://discourse.nodered.org/u/lsadow)\
**Replies:** 12\
**Last updated:** [7 November 2019 22:11 UTC](https://discourse.nodered.org/t/help-with-my-flow-generating-an-email-from-array/17346 "2019-11-07T22:11:58Z")

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Hi, I am new to node red and JavaScript. I would really appreciate help with a task I need to get working. I am running node red on an Opto 22 groov AR-1 and on the same network I have an Opto 22 Pac controller. I am usi…

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## [Node-RED scope, multi-threading and limitations](https://discourse.nodered.org/t/node-red-scope-multi-threading-and-limitations/214)

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**Author:** [@tree-frog](https://discourse.nodered.org/u/tree-frog)\
**Replies:** 16\
**Last updated:** [7 November 2019 19:23 UTC](https://discourse.nodered.org/t/node-red-scope-multi-threading-and-limitations/214 "2019-11-07T19:23:13Z")

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I’m an Electrical Engineer and familiar with C#, VB, PLC coding of many types. I have an application on our site that is written in C++ and it has interfaces with PLC’s via RSLinx and OPC Servers of different brands. T…

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## [Redirect HTTP requests to /index.html for React app](https://discourse.nodered.org/t/redirect-http-requests-to-index-html-for-react-app/17634)

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**Author:** [@episensor](https://discourse.nodered.org/u/episensor)\
**Replies:** 3\
**Last updated:** [7 November 2019 19:22 UTC](https://discourse.nodered.org/t/redirect-http-requests-to-index-html-for-react-app/17634 "2019-11-07T19:22:08Z")

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Hi All, If Node-RED is used to host a single page React webapp as static content at a top level domain, with an api running at /api, is it possible to redirect all non-API requests back to /index.html so they can be pro…

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## [Back to previous version NR](https://discourse.nodered.org/t/back-to-previous-version-nr/17642)

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**Author:** [@Soft4](https://discourse.nodered.org/u/Soft4)\
**Replies:** 3\
**Last updated:** [7 November 2019 19:05 UTC](https://discourse.nodered.org/t/back-to-previous-version-nr/17642 "2019-11-07T19:05:57Z")

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I have installed version 1.0.2, but I have to go back to the previous version (0.20.?) Of NR. I've been searching the forum for a while but can't find it. Do I have to add / adjust anything to the command? npm install -…

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## [Sending e-mail does not work (node-red-node-email)](https://discourse.nodered.org/t/sending-e-mail-does-not-work-node-red-node-email/17604)

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**Author:** [@bummzulu](https://discourse.nodered.org/u/bummzulu)\
**Replies:** 1\
**Last updated:** [7 November 2019 18:13 UTC](https://discourse.nodered.org/t/sending-e-mail-does-not-work-node-red-node-email/17604 "2019-11-07T18:13:10Z")

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Hello, I have upgraded from 0.19 to the latest version of node red v1.0.2. Since then sending e-mails over gmail does not work anymore. \[ { "id": "22a29086.083818", "type": "e-mail", "z": "…

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## [Serial node problem](https://discourse.nodered.org/t/serial-node-problem/17481)

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**Author:** [@iungo](https://discourse.nodered.org/u/iungo)\
**Replies:** 15\
**Last updated:** [7 November 2019 17:54 UTC](https://discourse.nodered.org/t/serial-node-problem/17481 "2019-11-07T17:54:42Z")

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I have some problems with using the serial node. It sends data w/o any problem, but able to receive data only in request mode. I want to connect the device, which sends data to serial w/o any request. Maybe somebody k…

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## [Cronplus timer and GPIO](https://discourse.nodered.org/t/cronplus-timer-and-gpio/17407)

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**Author:** [@fralac](https://discourse.nodered.org/u/fralac)\
**Replies:** 14\
**Last updated:** [7 November 2019 16:42 UTC](https://discourse.nodered.org/t/cronplus-timer-and-gpio/17407 "2019-11-07T16:42:59Z")

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A month ago about a month ago I started a led on/off project. At the end of this project I started another one that concerns a timer (cron-plus) that would guide the gpio but without success. I created my dashboard but I…

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## [Using python script to read Wiiboard data using bluetooth](https://discourse.nodered.org/t/using-python-script-to-read-wiiboard-data-using-bluetooth/17600)

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**Author:** [@YLM](https://discourse.nodered.org/u/YLM)\
**Replies:** 7\
**Last updated:** [7 November 2019 16:37 UTC](https://discourse.nodered.org/t/using-python-script-to-read-wiiboard-data-using-bluetooth/17600 "2019-11-07T16:37:28Z")

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Hi, I have a python script to read the data of the Wiiboard (it's works correctly if I run the python code from the terminal). I'd like to run the same thing in Note-red, so I have done a simple flow \[{"id":"e7d70765…

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## [And logic is not working](https://discourse.nodered.org/t/and-logic-is-not-working/17619)

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**Author:** [@pranavthakkar](https://discourse.nodered.org/u/pranavthakkar)\
**Replies:** 14\
**Last updated:** [7 November 2019 13:32 UTC](https://discourse.nodered.org/t/and-logic-is-not-working/17619 "2019-11-07T13:32:16Z")

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Hi I'm using blynk write node where when i press button it changes from 0 to 1 vice versa and also the other inject node which is in 1 but the and logic is not giving me true value when both are 1. blynk property is…

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## [Node-red with docker rfxtrx usb transreceiver disconnects](https://discourse.nodered.org/t/node-red-with-docker-rfxtrx-usb-transreceiver-disconnects/15924)

<div class="topic-metadata">

**Author:** [@Mapa0402](https://discourse.nodered.org/u/Mapa0402)\
**Replies:** 2\
**Last updated:** [7 November 2019 13:09 UTC](https://discourse.nodered.org/t/node-red-with-docker-rfxtrx-usb-transreceiver-disconnects/15924 "2019-11-07T13:09:50Z")

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Hi, I have a problem with the rfxtrx mapping to the USB-transreceiver. It works good most of the time but after running sometimes 24h and sometimes 3-4 days it gets suddenly disconnected. I'm using docker and the nodere…

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## [MQTT-In Not Connecting](https://discourse.nodered.org/t/mqtt-in-not-connecting/17325)

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**Author:** [@robomike](https://discourse.nodered.org/u/robomike)\
**Replies:** 69\
**Last updated:** [7 November 2019 10:29 UTC](https://discourse.nodered.org/t/mqtt-in-not-connecting/17325 "2019-11-07T10:29:10Z")

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Hi All, I have the latest npm node-red version, embedded into an express application. When I run node-red locally, or in a heroku instance , neither node-red instance mqtt-in connects. The node just is a constant disc…

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## [Configuration Node](https://discourse.nodered.org/t/configuration-node/17626)

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**Author:** [@MisterDraegus](https://discourse.nodered.org/u/MisterDraegus)\
**Replies:** 2\
**Last updated:** [7 November 2019 09:56 UTC](https://discourse.nodered.org/t/configuration-node/17626 "2019-11-07T09:56:24Z")

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Hello, I am currently working on a project and was wondering if it is possible to alter the information within a configuration node with an export/import. This would be a great help to be able to change this information…

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