# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=519

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

**Page:** 520

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## [Can't install node-red-contrib-serial-modbus](https://discourse.nodered.org/t/cant-install-node-red-contrib-serial-modbus/48670)

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**Author:** [@broehl](https://discourse.nodered.org/u/broehl)\
**Replies:** 10\
**Last updated:** [21 July 2021 21:57 UTC](https://discourse.nodered.org/t/cant-install-node-red-contrib-serial-modbus/48670 "2021-07-21T21:57:58Z")

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I'm using node-red on a Raspberry Pi. Very happy with it, had a project pretty close to being finished, but had an issue with my SD card and had to re-install. Installation of Node-RED went fine. I was then able to use…

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## [Embedded Node-red vs Middelware](https://discourse.nodered.org/t/embedded-node-red-vs-middelware/48678)

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**Author:** [@nored](https://discourse.nodered.org/u/nored)\
**Replies:** 1\
**Last updated:** [21 July 2021 21:14 UTC](https://discourse.nodered.org/t/embedded-node-red-vs-middelware/48678 "2021-07-21T21:14:02Z")

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im trying to convert nodejs express web application to node-red . My understanding till now is it that node-red in this case work juste like any other middelware in the nodejs host but with some differences : . if i ha…

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## [Node-red-contrib-unifi device IP](https://discourse.nodered.org/t/node-red-contrib-unifi-device-ip/48644)

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**Author:** [@tjarcoboerkoel](https://discourse.nodered.org/u/tjarcoboerkoel)\
**Replies:** 3\
**Last updated:** [21 July 2021 20:29 UTC](https://discourse.nodered.org/t/node-red-contrib-unifi-device-ip/48644 "2021-07-21T20:29:27Z")

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Dear readers, As a node-red starter I'm using the unifi node which works well. With the command 'ClientDevices' I'm able to get info about connected clients as presence detection, nice. Next step I need to find IP-addr…

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## [Getting remainder of messages from "counting" batch node](https://discourse.nodered.org/t/getting-remainder-of-messages-from-counting-batch-node/48728)

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**Author:** [@mdkrieg](https://discourse.nodered.org/u/mdkrieg)\
**Replies:** 2\
**Last updated:** [21 July 2021 18:54 UTC](https://discourse.nodered.org/t/getting-remainder-of-messages-from-counting-batch-node/48728 "2021-07-21T18:54:58Z")

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Hello, I'm working on a flow where I'm using "batch" to group a list of 1000+ requests to an API that can accept up to 200 data requests in one call. For my application I want these to all come out at once. So, suppose…

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## [Change-the-output-between-0-and-1-on-each-message-that-i-receive-in-the-input](https://discourse.nodered.org/t/change-the-output-between-0-and-1-on-each-message-that-i-receive-in-the-input/48726)

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**Author:** [@badr\_al\_moragab](https://discourse.nodered.org/u/badr_al_moragab)\
**Replies:** 3\
**Last updated:** [21 July 2021 17:03 UTC](https://discourse.nodered.org/t/change-the-output-between-0-and-1-on-each-message-that-i-receive-in-the-input/48726 "2021-07-21T17:03:17Z")

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Continuing the discussion from Change the Output between 0 and 1 on each message that I receive in the input:

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## [MQTT suddenly crashed](https://discourse.nodered.org/t/mqtt-suddenly-crashed/48544)

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**Author:** [@nonomu1](https://discourse.nodered.org/u/nonomu1)\
**Replies:** 14\
**Last updated:** [21 July 2021 16:20 UTC](https://discourse.nodered.org/t/mqtt-suddenly-crashed/48544 "2021-07-21T16:20:05Z")

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Hi all, We have a machine protocol that connect to ActiveMq via MQTT nodes. we are communicating via topic exchange. We are facing 2 main issue: On suddenly disconnect from ActiveMQ node-red crashes Sometimes MQTT n…

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## [Node-red-node-rbe in Manage Palette](https://discourse.nodered.org/t/node-red-node-rbe-in-manage-palette/48724)

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**Author:** [@FedeBZ](https://discourse.nodered.org/u/FedeBZ)\
**Replies:** 1\
**Last updated:** [21 July 2021 16:15 UTC](https://discourse.nodered.org/t/node-red-node-rbe-in-manage-palette/48724 "2021-07-21T16:15:53Z")

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What is this yellow danger symbol after update to V2.0.0? Thank you

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## [Sending data to node-red](https://discourse.nodered.org/t/sending-data-to-node-red/48711)

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**Author:** [@wael5300](https://discourse.nodered.org/u/wael5300)\
**Replies:** 1\
**Last updated:** [21 July 2021 15:39 UTC](https://discourse.nodered.org/t/sending-data-to-node-red/48711 "2021-07-21T15:39:14Z")

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After I have sent data to node-red, I want to send each parameter of the data(is:temperature , humidity) separately to each pin number of Blynk write node , How to do that?.

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## [Filename from a directory](https://discourse.nodered.org/t/filename-from-a-directory/48712)

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**Author:** [@madmax](https://discourse.nodered.org/u/madmax)\
**Replies:** 1\
**Last updated:** [21 July 2021 15:14 UTC](https://discourse.nodered.org/t/filename-from-a-directory/48712 "2021-07-21T15:14:47Z")

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Hello! Is it possible to read the filename from a directory?

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## [ZIP whole folder](https://discourse.nodered.org/t/zip-whole-folder/48656)

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**Author:** [@LucasJ98](https://discourse.nodered.org/u/LucasJ98)\
**Replies:** 8\
**Last updated:** [21 July 2021 14:58 UTC](https://discourse.nodered.org/t/zip-whole-folder/48656 "2021-07-21T14:58:04Z")

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Hi, is it possible to zip the whole folder if I don't know how many items are inside? Resp. I want to automate the backup of folders and somewhere there are also subfolders and different numbers of files. Thank you for …

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## [Smallest browser](https://discourse.nodered.org/t/smallest-browser/47759)

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**Author:** [@old-grumpy](https://discourse.nodered.org/u/old-grumpy)\
**Replies:** 15\
**Last updated:** [21 July 2021 13:35 UTC](https://discourse.nodered.org/t/smallest-browser/47759 "2021-07-21T13:35:34Z")

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Cant find any useful info on what is the smallest browser that works with the node-red dashboard. That will be the only task. The normal browser i use for the internet is firefox butt that is much to bulky and memory hun…

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## [Nrlint install issues](https://discourse.nodered.org/t/nrlint-install-issues/48707)

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**Author:** [@joost](https://discourse.nodered.org/u/joost)\
**Replies:** 5\
**Last updated:** [21 July 2021 13:32 UTC](https://discourse.nodered.org/t/nrlint-install-issues/48707 "2021-07-21T13:32:59Z")

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Hi! I'm having trouble getting the new nrlint to work with my newly updated NR 2.0.1 installation. I'm following the instructions as stated here GitHub - node-red/nrlint: Node-RED Flow Linter, but am not able to start my…

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## [Start flow with user and password](https://discourse.nodered.org/t/start-flow-with-user-and-password/48709)

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**Author:** [@federico.barenghi](https://discourse.nodered.org/u/federico.barenghi)\
**Replies:** 2\
**Last updated:** [21 July 2021 12:50 UTC](https://discourse.nodered.org/t/start-flow-with-user-and-password/48709 "2021-07-21T12:50:48Z")

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Hi, there is the possibilty to start a node-red istance with user and password? Like using the command " node-red -p 1880" and add the login credentials? Regards, Federico

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## [I need read and ZIP about 25-50GB files](https://discourse.nodered.org/t/i-need-read-and-zip-about-25-50gb-files/48705)

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**Author:** [@LucasJ98](https://discourse.nodered.org/u/LucasJ98)\
**Replies:** 1\
**Last updated:** [21 July 2021 12:14 UTC](https://discourse.nodered.org/t/i-need-read-and-zip-about-25-50gb-files/48705 "2021-07-21T12:14:46Z")

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BigFileReader reads only 2GB :(. It is possible to do ??

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## [Nrlint@1.0.1: What is wrong with this JSON?](https://discourse.nodered.org/t/nrlint-1-0-1-what-is-wrong-with-this-json/48658)

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**Author:** [@rei\_vilo](https://discourse.nodered.org/u/rei_vilo)\
**Replies:** 9\
**Last updated:** [21 July 2021 11:02 UTC](https://discourse.nodered.org/t/nrlint-1-0-1-what-is-wrong-with-this-json/48658 "2021-07-21T11:02:39Z")

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I am testing nrlint@1.0.1 with node-red@2.0.0. The inject node displays an exclamation mark with linting error. However, the JSON seems to be correct as it is accepted. { "Epoch": 1583082974, "Report": \[…

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## [Adding tags values from fins node](https://discourse.nodered.org/t/adding-tags-values-from-fins-node/48690)

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**Author:** [@sahsha](https://discourse.nodered.org/u/sahsha)\
**Replies:** 9\
**Last updated:** [21 July 2021 09:50 UTC](https://discourse.nodered.org/t/adding-tags-values-from-fins-node/48690 "2021-07-21T09:50:54Z")

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I'm trying to join payloads and add specific tag values for fins node. But unable to do so. Can anyone help? check flow \[{"id":"92176f57.09b46","type":"FINS Read","z":"5e017413.c6817c","name":"0 - 1000","connection":"5…

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## [Siemens PLC dynamic connection parameters](https://discourse.nodered.org/t/siemens-plc-dynamic-connection-parameters/48699)

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**Author:** [@Tommy28](https://discourse.nodered.org/u/Tommy28)\
**Replies:** 0\
**Last updated:** [21 July 2021 09:18 UTC](https://discourse.nodered.org/t/siemens-plc-dynamic-connection-parameters/48699 "2021-07-21T09:18:08Z")

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Hello, I am trying to create a project that allows to change connection parameters without project's edits. I get parameters from a file stored in my PC. I used file-in to read the file, a switch to read the correct row …

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## [2.0 tab image issues in Safari](https://discourse.nodered.org/t/2-0-tab-image-issues-in-safari/48696)

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**Author:** [@sroebert](https://discourse.nodered.org/u/sroebert)\
**Replies:** 2\
**Last updated:** [21 July 2021 09:06 UTC](https://discourse.nodered.org/t/2-0-tab-image-issues-in-safari/48696 "2021-07-21T09:06:36Z")

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In the 2.0 release there seems to be some design issues with the image used for tabs in the interface. For me it looks like this everywhere: This does not happen in Chrome.

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## [Python file cannot be executed with exec node](https://discourse.nodered.org/t/python-file-cannot-be-executed-with-exec-node/48620)

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**Author:** [@Athurian](https://discourse.nodered.org/u/Athurian)\
**Replies:** 3\
**Last updated:** [21 July 2021 08:26 UTC](https://discourse.nodered.org/t/python-file-cannot-be-executed-with-exec-node/48620 "2021-07-21T08:26:50Z")

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Python file cannot be executed with exec node. I did it the same way before. After formatting and updating the Raspberry Pi, the Python file cannot be executed in the exec node. It works fine in cmd, but not only in n…

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## [Access sub flow variables in a module](https://discourse.nodered.org/t/access-sub-flow-variables-in-a-module/48677)

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**Author:** [@marcus-j-davies](https://discourse.nodered.org/u/marcus-j-davies)\
**Replies:** 2\
**Last updated:** [20 July 2021 22:30 UTC](https://discourse.nodered.org/t/access-sub-flow-variables-in-a-module/48677 "2021-07-20T22:30:02Z")

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As the title states. A Z-Wave node, I am the author of, can act differently if added to a sub flow. This however, needs variables added to the sub flow (which is easy enough). But how on earth, do I access those varia…

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## [Any suggestion for web apps visual programming tools](https://discourse.nodered.org/t/any-suggestion-for-web-apps-visual-programming-tools/48611)

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**Author:** [@anguslou](https://discourse.nodered.org/u/anguslou)\
**Replies:** 1\
**Last updated:** [20 July 2021 22:07 UTC](https://discourse.nodered.org/t/any-suggestion-for-web-apps-visual-programming-tools/48611 "2021-07-20T22:07:53Z")

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I have been using Node-Red for quite a while, and looking for a visual programming tool to develop webapps that hopefully work seamlessly with Node-Red. I have been looking at bubble.io and UI bakery, any suggestion?

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## [Using node js variables in the node red](https://discourse.nodered.org/t/using-node-js-variables-in-the-node-red/48649)

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**Author:** [@OmkarNodered](https://discourse.nodered.org/u/OmkarNodered)\
**Replies:** 1\
**Last updated:** [20 July 2021 21:42 UTC](https://discourse.nodered.org/t/using-node-js-variables-in-the-node-red/48649 "2021-07-20T21:42:23Z")

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I have embedded node red into node js. I want to use variables or objects created in the node js in the node red flow. What would be the way to achieve it?

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## [Payload to array in loop](https://discourse.nodered.org/t/payload-to-array-in-loop/48639)

<div class="topic-metadata">

**Author:** [@tombost](https://discourse.nodered.org/u/tombost)\
**Replies:** 3\
**Last updated:** [20 July 2021 17:02 UTC](https://discourse.nodered.org/t/payload-to-array-in-loop/48639 "2021-07-20T17:02:09Z")

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Hello, I receive that : payload\[0\].TC1\_ERROR payload\[1\].TC2\_ERROR payload\[2\].TC3\_ERROR payload\[3\].TC4\_ERROR payload\[4\].TC5\_ERROR payload\[5\].TC6\_ERROR (all payload value are boolean) I want to…

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## [2.0 and 2.0.1 docker images aren't working on RPi4](https://discourse.nodered.org/t/2-0-and-2-0-1-docker-images-arent-working-on-rpi4/48663)

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**Author:** [@Edo78](https://discourse.nodered.org/u/Edo78)\
**Replies:** 7\
**Last updated:** [20 July 2021 19:44 UTC](https://discourse.nodered.org/t/2-0-and-2-0-1-docker-images-arent-working-on-rpi4/48663 "2021-07-20T19:44:29Z")

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As soon as the final 2.0 was released I pulled the new image on my Raspberry Pi 4 but the logs show only standard\_init\_linux.go:228: exec user process caused: exec format error and NR isn't working at all but keep restar…

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## [Question: Synchronize or mirror state of 2 devices](https://discourse.nodered.org/t/question-synchronize-or-mirror-state-of-2-devices/48364)

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**Author:** [@tmichaeltx](https://discourse.nodered.org/u/tmichaeltx)\
**Replies:** 12\
**Last updated:** [20 July 2021 17:16 UTC](https://discourse.nodered.org/t/question-synchronize-or-mirror-state-of-2-devices/48364 "2021-07-20T17:16:04Z")

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I am using Node Red for Smarthome automation and have decided that I want to have logical or virtual devices for everyplace I expect to automate with those devices tied to nodes for the physical device serving that role.…

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## [MQTT Disconected using AWS IoT core](https://discourse.nodered.org/t/mqtt-disconected-using-aws-iot-core/48668)

<div class="topic-metadata">

**Author:** [@fabri](https://discourse.nodered.org/u/fabri)\
**Replies:** 1\
**Last updated:** [20 July 2021 17:06 UTC](https://discourse.nodered.org/t/mqtt-disconected-using-aws-iot-core/48668 "2021-07-20T17:06:00Z")

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Hi everybody!! I'm using IoT core from AWS to receive data with MQTT at NodeRed. However, my MQTT nodes just keep disconnected every time I activate my certificates from AWS IoT Core. The first time I've created the mq…

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## [Use Message Properties in Node Configuration](https://discourse.nodered.org/t/use-message-properties-in-node-configuration/48618)

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**Author:** [@stokes776](https://discourse.nodered.org/u/stokes776)\
**Replies:** 5\
**Last updated:** [20 July 2021 16:54 UTC](https://discourse.nodered.org/t/use-message-properties-in-node-configuration/48618 "2021-07-20T16:54:25Z")

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Hello, I am trying to use the Azure Blob Storage Node, I can get it to upload a file to a folder, how I want, if I statically type in the values into the 'Storage Blob Name' section. However the problem is I want these …

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## [Detecting objects using ESP32 CAM and NODE RED](https://discourse.nodered.org/t/detecting-objects-using-esp32-cam-and-node-red/47165)

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**Author:** [@fatima1999](https://discourse.nodered.org/u/fatima1999)\
**Replies:** 49\
**Last updated:** [20 July 2021 16:02 UTC](https://discourse.nodered.org/t/detecting-objects-using-esp32-cam-and-node-red/47165 "2021-07-20T16:02:23Z")

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Hello everyone ! I need help in my project , I wanna built an IoT system , objects detection using ESP32 CAM and Node red Dashboard , all I did until now is visualising the pictures taking by the CAM on the dashboard , …

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## [Refresh logged in node-red making issues](https://discourse.nodered.org/t/refresh-logged-in-node-red-making-issues/48570)

<div class="topic-metadata">

**Author:** [@nonomu1](https://discourse.nodered.org/u/nonomu1)\
**Replies:** 3\
**Last updated:** [20 July 2021 15:49 UTC](https://discourse.nodered.org/t/refresh-logged-in-node-red-making-issues/48570 "2021-07-20T15:49:39Z")

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Hi all, I having a issue with node-red. When i log in from Ldap ( a script we built ) everything is ok. After refreshing the page we loosing all the connection ui and grid of the nodes. Before(OK): After (NOK): …

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## [Use an variable value to get a other variable](https://discourse.nodered.org/t/use-an-variable-value-to-get-a-other-variable/48643)

<div class="topic-metadata">

**Author:** [@Rchood](https://discourse.nodered.org/u/Rchood)\
**Replies:** 2\
**Last updated:** [20 July 2021 13:57 UTC](https://discourse.nodered.org/t/use-an-variable-value-to-get-a-other-variable/48643 "2021-07-20T13:57:58Z")

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Hi, I'm using an Aqara Cube to control my lights and every face of the cube controls a different light. So I would like to use the rotating function of the Cube to be able to dim the light (which is controlled by the s…

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