# Latest

**URL:** https://discourse.nodered.org/latest.md?page=875

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

**Page:** 876

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## [Help with generating image from captured data](https://discourse.nodered.org/t/help-with-generating-image-from-captured-data/40488)

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**Author:** [@blob](https://discourse.nodered.org/u/blob)\
**Replies:** 10\
**Last updated:** [26 February 2021 10:15 UTC](https://discourse.nodered.org/t/help-with-generating-image-from-captured-data/40488 "2021-02-26T10:15:05Z")

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Hi, I have a data generated from a camera feed and I would like to generate an image out of it. I'm wondering if anyone here could help me in this regard. Kindly find the file attached containing the data. The glitch is…

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## [Problem with join node](https://discourse.nodered.org/t/problem-with-join-node/41668)

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**Author:** [@sfedo](https://discourse.nodered.org/u/sfedo)\
**Replies:** 9\
**Last updated:** [26 February 2021 09:52 UTC](https://discourse.nodered.org/t/problem-with-join-node/41668 "2021-02-26T09:52:17Z")

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Hey, somehow I dont understand the join node. I would like to combine some payloads but allways receive this error: "Message missing key property 'msg.topic' - cannot add to object" I use some buttons wich sends numb…

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## [Stop a Flow with a button on the dashboard](https://discourse.nodered.org/t/stop-a-flow-with-a-button-on-the-dashboard/41633)

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**Author:** [@Gerry-it](https://discourse.nodered.org/u/Gerry-it)\
**Replies:** 9\
**Last updated:** [26 February 2021 09:49 UTC](https://discourse.nodered.org/t/stop-a-flow-with-a-button-on-the-dashboard/41633 "2021-02-26T09:49:40Z")

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Hi, I would like to STOP a flow with a Button in the nora-red UI dashboard. The flow is checking the http-stream of a camera and detect objects on the cam picture with the tensorflow. The flow gets started with a Start-…

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## [Node red postgres multi](https://discourse.nodered.org/t/node-red-postgres-multi/41673)

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**Author:** [@dushi](https://discourse.nodered.org/u/dushi)\
**Replies:** 0\
**Last updated:** [26 February 2021 09:46 UTC](https://discourse.nodered.org/t/node-red-postgres-multi/41673 "2021-02-26T09:46:07Z")

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Hi, I'm new in node red. I created a flow where i use postgres multi, everything works fine until i restart docker. Could anyone help me understand this error. This only happens when I use postgres-multi.

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## [Beginner's problem: No connection to MQTT](https://discourse.nodered.org/t/beginners-problem-no-connection-to-mqtt/41648)

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**Author:** [@Ursusprimus](https://discourse.nodered.org/u/Ursusprimus)\
**Replies:** 11\
**Last updated:** [26 February 2021 08:26 UTC](https://discourse.nodered.org/t/beginners-problem-no-connection-to-mqtt/41648 "2021-02-26T08:26:38Z")

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Hi, I'm quite new to node red and just tried to get a MQTT connection running without success. I entered the ip address and username/password and a topic as well. However, after deploying there's no "connected"-indicato…

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## [Node-red-contrib-mpi-s7 installation error](https://discourse.nodered.org/t/node-red-contrib-mpi-s7-installation-error/38837)

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**Author:** [@parthsarthi94](https://discourse.nodered.org/u/parthsarthi94)\
**Replies:** 13\
**Last updated:** [26 February 2021 07:18 UTC](https://discourse.nodered.org/t/node-red-contrib-mpi-s7-installation-error/38837 "2021-02-26T07:18:39Z")

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undefined ls-remote -h -t ssh://git@github.com/gfcittolin/node-usb.git

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## [Node-red dont allow me to install nodes (Raspberry - SSH)](https://discourse.nodered.org/t/node-red-dont-allow-me-to-install-nodes-raspberry-ssh/41598)

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**Author:** [@NicolasVLN](https://discourse.nodered.org/u/NicolasVLN)\
**Replies:** 2\
**Last updated:** [26 February 2021 00:52 UTC](https://discourse.nodered.org/t/node-red-dont-allow-me-to-install-nodes-raspberry-ssh/41598 "2021-02-26T00:52:27Z")

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Hi guys, i have an issue installing nodes on my raspberry pi 3, share pics. how could i fix it? Saludos, Nicolas Velasquez N.

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## [contrib-ARP node spiking groov EPIC CPU %](https://discourse.nodered.org/t/contrib-arp-node-spiking-groov-epic-cpu/41655)

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**Author:** [@mbrunga](https://discourse.nodered.org/u/mbrunga)\
**Replies:** 0\
**Last updated:** [25 February 2021 22:34 UTC](https://discourse.nodered.org/t/contrib-arp-node-spiking-groov-epic-cpu/41655 "2021-02-25T22:34:54Z")

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Currently running a flow on an Opto22 groov EPIC PR1 to check the status of iPads on a network being used as HMIs in a manufacturing facility. Specifically using the node node-red-contrib-ARP with a function to pass the …

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## [How to search in Node-RED docs?](https://discourse.nodered.org/t/how-to-search-in-node-red-docs/41652)

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**Author:** [@Wirewrap](https://discourse.nodered.org/u/Wirewrap)\
**Replies:** 5\
**Last updated:** [25 February 2021 22:47 UTC](https://discourse.nodered.org/t/how-to-search-in-node-red-docs/41652 "2021-02-25T22:47:24Z")

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Trying to search in the "docs", I can't find a search field like the looking glass in the header of this forum. How can I search?

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## [Trying to remove custom node](https://discourse.nodered.org/t/trying-to-remove-custom-node/41632)

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**Author:** [@jtaylor](https://discourse.nodered.org/u/jtaylor)\
**Replies:** 4\
**Last updated:** [25 February 2021 22:16 UTC](https://discourse.nodered.org/t/trying-to-remove-custom-node/41632 "2021-02-25T22:16:13Z")

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I installed a custom node (https://flows.nodered.org/node/node-red-contrib-db2-for-i). I need to remove it because it has a SQL injection vulnerability and I have to make sure it's not used. I run the uninstall, restar…

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## [Filenames with weird characters in them](https://discourse.nodered.org/t/filenames-with-weird-characters-in-them/41646)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 7\
**Last updated:** [25 February 2021 21:33 UTC](https://discourse.nodered.org/t/filenames-with-weird-characters-in-them/41646 "2021-02-25T21:33:05Z")

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This is the important part of the code/flow: (Need fs-ops-move node) \[{"id":"11f8a8d.dd42957","type":"function","z":"26262ba1.62dcbc","g":"c73138f5.6f42f","name":"build msg","func":"msg.spath = \\"/home/me/.node-red/pub…

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## [Contrib-huemagic: Dimm Switch not found](https://discourse.nodered.org/t/contrib-huemagic-dimm-switch-not-found/41650)

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**Author:** [@pihlo](https://discourse.nodered.org/u/pihlo)\
**Replies:** 0\
**Last updated:** [25 February 2021 21:21 UTC](https://discourse.nodered.org/t/contrib-huemagic-dimm-switch-not-found/41650 "2021-02-25T21:21:15Z")

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I run on latest releases. First time using my new HUE Bridge and 3 lamps - WOW.. Cool, all stuff is working. Last step was implement the HUE Dimm Switch. Add the node and search - the listbox is empty, no errormessage…

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## [COM Port data - Serial Device](https://discourse.nodered.org/t/com-port-data-serial-device/41634)

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**Author:** [@sathishkumarc14](https://discourse.nodered.org/u/sathishkumarc14)\
**Replies:** 1\
**Last updated:** [25 February 2021 19:24 UTC](https://discourse.nodered.org/t/com-port-data-serial-device/41634 "2021-02-25T19:24:18Z")

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We are trying to fetch data from serial device which is connected in COM3 port as RS232. We are able to get data from serial device. But, once in a while it returning NULL values or not returning anything. Is there any s…

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## [Recorrer consulta influxdb](https://discourse.nodered.org/t/recorrer-consulta-influxdb/41620)

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**Author:** [@novato1221](https://discourse.nodered.org/u/novato1221)\
**Replies:** 4\
**Last updated:** [25 February 2021 19:14 UTC](https://discourse.nodered.org/t/recorrer-consulta-influxdb/41620 "2021-02-25T19:14:12Z")

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Estoy realizando ese programa pero me aparece el siguiente error en la segunda función: TypeError: Cannot read property 'time' of undefined

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## [Image from RPi to dashboard](https://discourse.nodered.org/t/image-from-rpi-to-dashboard/40876)

<div class="topic-metadata">

**Author:** [@HZB](https://discourse.nodered.org/u/HZB)\
**Replies:** 33\
**Last updated:** [25 February 2021 19:00 UTC](https://discourse.nodered.org/t/image-from-rpi-to-dashboard/40876 "2021-02-25T19:00:44Z")

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I have few imagines that i have to display on the dashboard. I am running node red in Raspberry Pi for that dashboard. I saved the images in the Pi. Now the problem is how to set up media node so that i can display image…

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## [Creating a variable sized object array](https://discourse.nodered.org/t/creating-a-variable-sized-object-array/41630)

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**Author:** [@quentinP](https://discourse.nodered.org/u/quentinP)\
**Replies:** 2\
**Last updated:** [25 February 2021 17:18 UTC](https://discourse.nodered.org/t/creating-a-variable-sized-object-array/41630 "2021-02-25T17:18:26Z")

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I'm trying to create and store an array of objects with lenght i that I get from the length of my object array from an SQL query to my databse and initilize it with '0' to modify and use down the line. This is the code I…

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## [Build dynamic query string for InfluxDB](https://discourse.nodered.org/t/build-dynamic-query-string-for-influxdb/41354)

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**Author:** [@borpin](https://discourse.nodered.org/u/borpin)\
**Replies:** 24\
**Last updated:** [25 February 2021 16:45 UTC](https://discourse.nodered.org/t/build-dynamic-query-string-for-influxdb/41354 "2021-02-25T16:45:47Z")

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I'd like to build a dynamic query string to pass to InfluxDB node from an Inject node. The standard string SELECT sum("diff\_rain\_mm") AS "sum\_diff\_rain\_mm" FROM "telegraf"."autogen"."emon\_input" WHERE time \> now() - 10…

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## [Dashboard data resets on power cycle of R Pi](https://discourse.nodered.org/t/dashboard-data-resets-on-power-cycle-of-r-pi/41572)

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**Author:** [@HZB](https://discourse.nodered.org/u/HZB)\
**Replies:** 9\
**Last updated:** [25 February 2021 15:49 UTC](https://discourse.nodered.org/t/dashboard-data-resets-on-power-cycle-of-r-pi/41572 "2021-02-25T15:49:21Z")

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Hi, I am working on a project and i noticed that my Node red dashboard's data resets after every power cycle. I want it to save the data and display the last update after power cycle. Any suggestions?

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## [Parse json data into function](https://discourse.nodered.org/t/parse-json-data-into-function/38627)

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**Author:** [@Marty1982](https://discourse.nodered.org/u/Marty1982)\
**Replies:** 3\
**Last updated:** [25 February 2021 14:46 UTC](https://discourse.nodered.org/t/parse-json-data-into-function/38627 "2021-02-25T14:46:19Z")

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Hi all! I just want to parse Json data using Tasmota devices via MQTT into a function in order to obtain certain data that i need and put into a message via Telegram. The main idea is to obtain via MQTT the actual host…

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## [Popup-window with input / output values via notification node](https://discourse.nodered.org/t/popup-window-with-input-output-values-via-notification-node/41628)

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**Author:** [@JoeWiseman](https://discourse.nodered.org/u/JoeWiseman)\
**Replies:** 0\
**Last updated:** [25 February 2021 14:39 UTC](https://discourse.nodered.org/t/popup-window-with-input-output-values-via-notification-node/41628 "2021-02-25T14:39:04Z")

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Hi there, I need a popup window for adjusting two numerical values by the user. As I saw it is possible to send html-code to the notification node .... So I sent html-conde for two sliders with the given steps .... Tha…

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## [Change dashboard name size](https://discourse.nodered.org/t/change-dashboard-name-size/41617)

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**Author:** [@xors](https://discourse.nodered.org/u/xors)\
**Replies:** 3\
**Last updated:** [25 February 2021 14:24 UTC](https://discourse.nodered.org/t/change-dashboard-name-size/41617 "2021-02-25T14:24:21Z")

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Hi there, I've been using Node-red for quite a long time but it's the first time I come across an issue I can't find the solution to, so here I am asking it to you the experts. Is there a way to increase the size of th…

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## [Where/how does "Delay" store data?](https://discourse.nodered.org/t/where-how-does-delay-store-data/41602)

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**Author:** [@NickXML](https://discourse.nodered.org/u/NickXML)\
**Replies:** 6\
**Last updated:** [25 February 2021 14:04 UTC](https://discourse.nodered.org/t/where-how-does-delay-store-data/41602 "2021-02-25T14:04:58Z")

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I have a system where data arrives in waves. There are a potentially large number of sensors that report data every few minutes. My node-red flow grabs this data and writes it to influxdb. I'm using a delay node as a ra…

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## [How do i create an AngularTS app which can listen to NR Sockets](https://discourse.nodered.org/t/how-do-i-create-an-angularts-app-which-can-listen-to-nr-sockets/41561)

<div class="topic-metadata">

**Author:** [@fallenreaper](https://discourse.nodered.org/u/fallenreaper)\
**Replies:** 1\
**Last updated:** [25 February 2021 14:01 UTC](https://discourse.nodered.org/t/how-do-i-create-an-angularts-app-which-can-listen-to-nr-sockets/41561 "2021-02-25T14:01:18Z")

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So, i have a client which really likes node red's ease of use for Diagram designing. It has a nice little flow he created. That information then needs to be forwarded to monitoring dashboards which is where I have been…

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## [Catch problem siemens input node](https://discourse.nodered.org/t/catch-problem-siemens-input-node/41624)

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**Author:** [@Ward](https://discourse.nodered.org/u/Ward)\
**Replies:** 2\
**Last updated:** [25 February 2021 13:59 UTC](https://discourse.nodered.org/t/catch-problem-siemens-input-node/41624 "2021-02-25T13:59:16Z")

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Hi, Sometimes i have problems with the communication to a Siemens PLC. Now i wanted to catch this problem so i can send a message or email when this happens. I set it up as you can see in the picture below: But as yo…

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## [Best notifier from Grafana to feed into Node-RED](https://discourse.nodered.org/t/best-notifier-from-grafana-to-feed-into-node-red/38623)

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**Author:** [@grant1](https://discourse.nodered.org/u/grant1)\
**Replies:** 9\
**Last updated:** [25 February 2021 13:42 UTC](https://discourse.nodered.org/t/best-notifier-from-grafana-to-feed-into-node-red/38623 "2021-02-25T13:42:42Z")

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I have the common setup whereby Node-RED gathers data, sends it to InfluxDB, and then plot it on Grafana to visualize the data. I also use Grafana's alerting features to let me know when something is wrong. Their list …

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## [Italian language translation](https://discourse.nodered.org/t/italian-language-translation/38173)

<div class="topic-metadata">

**Author:** [@gablau](https://discourse.nodered.org/u/gablau)\
**Replies:** 4\
**Last updated:** [25 February 2021 12:35 UTC](https://discourse.nodered.org/t/italian-language-translation/38173 "2021-02-25T12:35:13Z")

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Hello, my name is Gabriele and I am Italian. I have been using Node-RED since version 0.17.x and have already created some nodes. I would like to make a further contribution by starting the Italian translation. How m…

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## [Input text field with buttons](https://discourse.nodered.org/t/input-text-field-with-buttons/41618)

<div class="topic-metadata">

**Author:** [@sfedo](https://discourse.nodered.org/u/sfedo)\
**Replies:** 1\
**Last updated:** [25 February 2021 12:16 UTC](https://discourse.nodered.org/t/input-text-field-with-buttons/41618 "2021-02-25T12:16:44Z")

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Hello, I would like use buttons as numbers for an input field, it looks like this: but when I press the button, its obviosly not continue adding number, it just change the current number. How I can add numbers until…

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## [Custom node-red logger- show line numbers](https://discourse.nodered.org/t/custom-node-red-logger-show-line-numbers/17924)

<div class="topic-metadata">

**Author:** [@uma](https://discourse.nodered.org/u/uma)\
**Replies:** 8\
**Last updated:** [25 February 2021 12:08 UTC](https://discourse.nodered.org/t/custom-node-red-logger-show-line-numbers/17924 "2021-02-25T12:08:49Z")

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Hi I am trying to debug an error in my custom node. I get something like this in the console: 14 Nov 16:28:44 - \[error\] \[test-validation:d5746feb.8c06d\] TypeError: Cannot read property 'undefined' of undefined Though…

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## [Trigger New process when previous node finish working](https://discourse.nodered.org/t/trigger-new-process-when-previous-node-finish-working/41545)

<div class="topic-metadata">

**Author:** [@nadeemciit102](https://discourse.nodered.org/u/nadeemciit102)\
**Replies:** 10\
**Last updated:** [25 February 2021 11:10 UTC](https://discourse.nodered.org/t/trigger-new-process-when-previous-node-finish-working/41545 "2021-02-25T11:10:07Z")

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Hi All, I need to start new process when previous nodes finish working (like Post or get request response received) But I don't want to pass msg data got from previous node. Regards,

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## [Struggle with boolean](https://discourse.nodered.org/t/struggle-with-boolean/41581)

<div class="topic-metadata">

**Author:** [@JJdave](https://discourse.nodered.org/u/JJdave)\
**Replies:** 20\
**Last updated:** [25 February 2021 10:36 UTC](https://discourse.nodered.org/t/struggle-with-boolean/41581 "2021-02-25T10:36:30Z")

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Hi, I am pretty new here and started working with NR a couple of weeks ago, so still a novice. Currently struggeling with simple boolean logic. I just want to made a simple AND logic, where one input is a state-change …

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