# Latest **URL:** https://discourse.nodered.org/latest.md?page=1281 [Latest](https://discourse.nodered.org/latest.md) · [Categories](https://discourse.nodered.org/categories.md) · [Tags](https://discourse.nodered.org/tags.md) **Page:** 1282 --- ## [Is it possible to dynamically change 'required' property for a dynamic property?](https://discourse.nodered.org/t/is-it-possible-to-dynamically-change-required-property-for-a-dynamic-property/10914)
**Author:** [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\ **Replies:** 2\ **Last updated:** [10 May 2019 13:00 UTC](https://discourse.nodered.org/t/is-it-possible-to-dynamically-change-required-property-for-a-dynamic-property/10914 "2019-05-10T13:00:59Z")
Is it possible to dynamically change 'required' property for a dynamic property? What i mean is suppose you have 2 general purpose parameters on your node config editor that are sometimes required, sometimes not (depend… --- ## [Best practice for sharing static object between instances of a node type](https://discourse.nodered.org/t/best-practice-for-sharing-static-object-between-instances-of-a-node-type/10880)
**Author:** [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\ **Replies:** 2\ **Last updated:** [10 May 2019 12:40 UTC](https://discourse.nodered.org/t/best-practice-for-sharing-static-object-between-instances-of-a-node-type/10880 "2019-05-10T12:40:07Z")
Where would one store a 'common object' for re-use across all node instances? e.g. Lets say I am developing a node called image and on my flow there are 10 instances. I would like each instance (server side) to be abl… --- ## [Restart node-red automatically](https://discourse.nodered.org/t/restart-node-red-automatically/10983)
**Author:** [@carlosglez](https://discourse.nodered.org/u/carlosglez)\ **Replies:** 7\ **Last updated:** [10 May 2019 11:15 UTC](https://discourse.nodered.org/t/restart-node-red-automatically/10983 "2019-05-10T11:15:50Z")
Hello, I want that if my node-red stops for some reason that it can be restarted by itself. I was thinking in using a python script with "os.system()" and then using "crontab -e" to init it in the start of the device. I… --- ## [How to set custom icon/color on a subflow?](https://discourse.nodered.org/t/how-to-set-custom-icon-color-on-a-subflow/10986)
**Author:** [@naamah75](https://discourse.nodered.org/u/naamah75)\ **Replies:** 4\ **Last updated:** [10 May 2019 11:14 UTC](https://discourse.nodered.org/t/how-to-set-custom-icon-color-on-a-subflow/10986 "2019-05-10T11:14:13Z")
it's possible to set a custom icon and color on a subflow? I would mean, not the icons available with node-red, but something like a uploaded png file. --- ## [How to implement a timeout on a subflow?](https://discourse.nodered.org/t/how-to-implement-a-timeout-on-a-subflow/10980)
**Author:** [@naamah75](https://discourse.nodered.org/u/naamah75)\ **Replies:** 2\ **Last updated:** [10 May 2019 09:04 UTC](https://discourse.nodered.org/t/how-to-implement-a-timeout-on-a-subflow/10980 "2019-05-10T09:04:43Z")
I would want to write a subflow that implement a modbus-rtu request and the relative reading of the response, but in case of no answer from the mosbus client I need to "exit" from subflow with a timeout output. I wouldn… --- ## [Sampling data for chart](https://discourse.nodered.org/t/sampling-data-for-chart/10982)
**Author:** [@accuser](https://discourse.nodered.org/u/accuser)\ **Replies:** 2\ **Last updated:** [10 May 2019 08:55 UTC](https://discourse.nodered.org/t/sampling-data-for-chart/10982 "2019-05-10T08:55:35Z")
I am capturing output from an MVHR unit, taking readings every 1s (for control purposes). I want to chart this over 24 hours, but need a lot less data points. Is there a node or flow in existence that will let me sample … --- ## [K-30 CO2 sensor](https://discourse.nodered.org/t/k-30-co2-sensor/3399)
**Author:** [@tramanah](https://discourse.nodered.org/u/tramanah)\ **Replies:** 14\ **Last updated:** [10 May 2019 07:31 UTC](https://discourse.nodered.org/t/k-30-co2-sensor/3399 "2019-05-10T07:31:21Z")
Hi, I am running this python script for monitoring CO2 level, the code is running perfectly. How i can convert this script into NODE RED. Thank you. #rpi serial connections #Python app to run a K-30 Sensor import ser… --- ## [Extremely slow loading of GUI](https://discourse.nodered.org/t/extremely-slow-loading-of-gui/10955)
**Author:** [@awasen](https://discourse.nodered.org/u/awasen)\ **Replies:** 4\ **Last updated:** [10 May 2019 05:35 UTC](https://discourse.nodered.org/t/extremely-slow-loading-of-gui/10955 "2019-05-10T05:35:17Z")
9 May 15:42:07 - \[info\] Welcome to Node-RED 9 May 15:42:07 - \[info\] Node-RED version: v0.20.5 9 May 15:42:07 - \[info\] Node.js version: v10.15.3 9 May 15:42:07 - \[info\] Linux 4.14.98-v7+ arm LE 9 May 15:42:09 - \[inf… --- ## [Replay of MQTT topics upon Deploy](https://discourse.nodered.org/t/replay-of-mqtt-topics-upon-deploy/10969)
**Author:** [@biz](https://discourse.nodered.org/u/biz)\ **Replies:** 3\ **Last updated:** [9 May 2019 21:18 UTC](https://discourse.nodered.org/t/replay-of-mqtt-topics-upon-deploy/10969 "2019-05-09T21:18:38Z")
Hello All. A fairly long time but intermintent user of Node-Red Love it! A tiny bit of background. I initially had node red 18.4 on my raspberry pi. Used it worked great but quickly expanded out of a raspberry pi since … --- ## [GET request is not working](https://discourse.nodered.org/t/get-request-is-not-working/10965)
**Author:** [@Tonna100](https://discourse.nodered.org/u/Tonna100)\ **Replies:** 2\ **Last updated:** [9 May 2019 18:49 UTC](https://discourse.nodered.org/t/get-request-is-not-working/10965 "2019-05-09T18:49:29Z")
Input object: msg.payload : {"object":"page","entry":\[{"id":"463445907732883","time":1557422097573,"messaging":\[{"recipient":{"id":"463445907732883"},"timestamp":1557422097573,"sender":{"id":"2091862310930299"},"postbac… --- ## [Function node wait for 24 hours/ irrigation timer (SOLVED)](https://discourse.nodered.org/t/function-node-wait-for-24-hours-irrigation-timer-solved/10963)
**Author:** [@Poodlepapa](https://discourse.nodered.org/u/Poodlepapa)\ **Replies:** 3\ **Last updated:** [9 May 2019 16:47 UTC](https://discourse.nodered.org/t/function-node-wait-for-24-hours-irrigation-timer-solved/10963 "2019-05-09T16:47:54Z")
I have built a project to water my raised garden beds. I'm using an MCP3008 connected to a raspberry pi zero. All of the components are working great, but... I'd like to monitor and graph the data from the moisture and … --- ## [LG webOS and Raspberry Pi](https://discourse.nodered.org/t/lg-webos-and-raspberry-pi/10938)
**Author:** [@mshaz](https://discourse.nodered.org/u/mshaz)\ **Replies:** 4\ **Last updated:** [9 May 2019 15:49 UTC](https://discourse.nodered.org/t/lg-webos-and-raspberry-pi/10938 "2019-05-09T15:49:10Z")
Hi am newbie, I read that webOS can be installed in Raspberry Pi 3 but can node-red runs on LG webOS or i need another Pi than runs on Raspbian and use the node-red to control LG screen with Pi 3 running webOS? Thank y… --- ## [Hosting Node-RED and running "untrusted" flows](https://discourse.nodered.org/t/hosting-node-red-and-running-untrusted-flows/10961)
**Author:** [@BenediktMiller](https://discourse.nodered.org/u/BenediktMiller)\ **Replies:** 0\ **Last updated:** [9 May 2019 14:31 UTC](https://discourse.nodered.org/t/hosting-node-red-and-running-untrusted-flows/10961 "2019-05-09T14:31:44Z")
Hey, I am currently wondering if it is possible for me to host Node-Red for Users and let them create their own flows that run on my server/in my docker container. This setup would create one docker container per user. … --- ## [Extracting data from msg.payload](https://discourse.nodered.org/t/extracting-data-from-msg-payload/10945)
**Author:** [@Zain-Shahwar](https://discourse.nodered.org/u/Zain-Shahwar)\ **Replies:** 8\ **Last updated:** [9 May 2019 14:17 UTC](https://discourse.nodered.org/t/extracting-data-from-msg-payload/10945 "2019-05-09T14:17:22Z")
Hi Everyone, I have an Arduino connected serially to my Raspberry Pi where I have node-red running. Arduino is sensing temperature data from the sensor and is send to Raspberry Pi. Everything is working perfect but I h… --- ## [Node Red OPCUA error when installing](https://discourse.nodered.org/t/node-red-opcua-error-when-installing/10952)
**Author:** [@vysakhraj](https://discourse.nodered.org/u/vysakhraj)\ **Replies:** 1\ **Last updated:** [9 May 2019 13:34 UTC](https://discourse.nodered.org/t/node-red-opcua-error-when-installing/10952 "2019-05-09T13:34:39Z")
Hi All, I am facing an issue when I try to install OPCUA node in Node Red... Below is the message I am getting when I try to install it. Can someone please tell me why this is happening and how can I solve it ? root@io… --- ## [Node-red-contrib-timeout not updating in flows site](https://discourse.nodered.org/t/node-red-contrib-timeout-not-updating-in-flows-site/10940)
**Author:** [@scargill](https://discourse.nodered.org/u/scargill)\ **Replies:** 4\ **Last updated:** [9 May 2019 11:39 UTC](https://discourse.nodered.org/t/node-red-contrib-timeout-not-updating-in-flows-site/10940 "2019-05-09T11:39:54Z")
Can anyone help? I've updated node-red-contrib-timeout 3 days ago to version 1.1.3 and it appeared immediately on npm as usual. It has NOT however appeared in flows.nodered.org Pete --- ## [TypeError First argument should be a valid curve name on HTTP node](https://discourse.nodered.org/t/typeerror-first-argument-should-be-a-valid-curve-name-on-http-node/10937)
**Author:** [@smit.riaan](https://discourse.nodered.org/u/smit.riaan)\ **Replies:** 6\ **Last updated:** [9 May 2019 07:44 UTC](https://discourse.nodered.org/t/typeerror-first-argument-should-be-a-valid-curve-name-on-http-node/10937 "2019-05-09T07:44:51Z")
Hi, I've run into a problem which I hope someone can help me with. I'm suddenly getting an error on a HTTP node that is POSTing to another server. The flow has been perfectly for almost a year and now suddenly I'm getti… --- ## [TCP output problem sending byte over 127](https://discourse.nodered.org/t/tcp-output-problem-sending-byte-over-127/10922)
**Author:** [@naamah75](https://discourse.nodered.org/u/naamah75)\ **Replies:** 2\ **Last updated:** [9 May 2019 06:27 UTC](https://discourse.nodered.org/t/tcp-output-problem-sending-byte-over-127/10922 "2019-05-09T06:27:09Z")
I'm facing a very strange problem! :roll\_eyes: I'm tring to send a string (using the TCP output node) created from an a byte array. The problem is the following: if I send a byte with a value over 127 I receive an addi… --- ## [Upgrade on Raspberry Pi hang or loop](https://discourse.nodered.org/t/upgrade-on-raspberry-pi-hang-or-loop/10916)
**Author:** [@webtour](https://discourse.nodered.org/u/webtour)\ **Replies:** 8\ **Last updated:** [8 May 2019 16:38 UTC](https://discourse.nodered.org/t/upgrade-on-raspberry-pi-hang-or-loop/10916 "2019-05-08T16:38:18Z")
Hi, I have a raspberry Pi 3 with the raspbian image from last year installed. When I want to upgarde the node-red software with this command: bash \<(curl -sL https://raw.githubusercontent.com/node-red/raspbian-deb-pac… --- ## [Lookup JSON response in another JSON response](https://discourse.nodered.org/t/lookup-json-response-in-another-json-response/9250)
**Author:** [@g7kse](https://discourse.nodered.org/u/g7kse)\ **Replies:** 17\ **Last updated:** [8 May 2019 14:35 UTC](https://discourse.nodered.org/t/lookup-json-response-in-another-json-response/9250 "2019-05-08T14:35:57Z")
I'm extremely new to all of this and have a small issue to do with JSON I am trying to build up a small dashboard for a satellite project. Data is held in a couple of JSON URL's. The first API is one called Observations… --- ## [ECONNRESET Error](https://discourse.nodered.org/t/econnreset-error/10919)
**Author:** [@tcontrada](https://discourse.nodered.org/u/tcontrada)\ **Replies:** 1\ **Last updated:** [8 May 2019 13:52 UTC](https://discourse.nodered.org/t/econnreset-error/10919 "2019-05-08T13:52:42Z")
I have my Node Red app running, but after a couple of days I get the following error message and the Node Red server stops: Error: read ECONNRESET at TCP.onStreamRead (internal/stream\_base\_commons.js:111:27)\* My NR v… --- ## [Updating variables on arduino 8266](https://discourse.nodered.org/t/updating-variables-on-arduino-8266/10870)
**Author:** [@ArduinoBuddy8266](https://discourse.nodered.org/u/ArduinoBuddy8266)\ **Replies:** 3\ **Last updated:** [8 May 2019 09:32 UTC](https://discourse.nodered.org/t/updating-variables-on-arduino-8266/10870 "2019-05-08T09:32:52Z")
Can I set an arduino esp8266 to power on/off a relay based on being above temp X. But have it so I can change the variable X from "the cloud" (aka some vps)? As an example, I want the microcontroller to turn fan on if o… --- ## [Connection failed to the broker](https://discourse.nodered.org/t/connection-failed-to-the-broker/10913)
**Author:** [@manal](https://discourse.nodered.org/u/manal)\ **Replies:** 2\ **Last updated:** [8 May 2019 09:12 UTC](https://discourse.nodered.org/t/connection-failed-to-the-broker/10913 "2019-05-08T09:12:23Z")
Hi, Node-red suddenly stops connection with my broker in another device. the broker is active and running, and I ping the devices in both sides, they are connected. the only message in node-red "connection failed to b… --- ## [Cannot start node-red](https://discourse.nodered.org/t/cannot-start-node-red/10911)
**Author:** [@hathemi](https://discourse.nodered.org/u/hathemi)\ **Replies:** 5\ **Last updated:** [8 May 2019 08:27 UTC](https://discourse.nodered.org/t/cannot-start-node-red/10911 "2019-05-08T08:27:20Z")
how can i fixe it ??? --- ## [MQTT log file in Window 10](https://discourse.nodered.org/t/mqtt-log-file-in-window-10/10907)
**Author:** [@tramanah](https://discourse.nodered.org/u/tramanah)\ **Replies:** 3\ **Last updated:** [8 May 2019 06:43 UTC](https://discourse.nodered.org/t/mqtt-log-file-in-window-10/10907 "2019-05-08T06:43:27Z")
Hi good day, Currently i am trying to view log file for MQTT transaction between subscriber and publisher in Window 10. I am using MOSCA MQTT Broker. May i know the file location. --- ## [Start node red on boot with Cellular](https://discourse.nodered.org/t/start-node-red-on-boot-with-cellular/3395)
**Author:** [@dreydean1](https://discourse.nodered.org/u/dreydean1)\ **Replies:** 4\ **Last updated:** [8 May 2019 06:30 UTC](https://discourse.nodered.org/t/start-node-red-on-boot-with-cellular/3395 "2019-05-08T06:30:53Z")
I am creating a product which uses the Hologram Nova USB cellular modem plugged into a beaglebone black to send mqtt messages. I am having trouble getting node red to fire up on boot. I have created the recommended servi… --- ## [Cannot access node-red](https://discourse.nodered.org/t/cannot-access-node-red/5225)
**Author:** [@MPELectronique](https://discourse.nodered.org/u/MPELectronique)\ **Replies:** 35\ **Last updated:** [6 December 2018 07:35 UTC](https://discourse.nodered.org/t/cannot-access-node-red/5225 "2018-12-06T07:35:46Z")
Hi. It's been 2 days i have started with node-red, i think i have installed a wrong package. Before it was working fine then i see that when i tried to run node-red: Start Node-RED Once Node-RED has started, point a b… --- ## [Dashboard Link to local file](https://discourse.nodered.org/t/dashboard-link-to-local-file/10690)
**Author:** [@StrongTown](https://discourse.nodered.org/u/StrongTown)\ **Replies:** 4\ **Last updated:** [8 May 2019 01:12 UTC](https://discourse.nodered.org/t/dashboard-link-to-local-file/10690 "2019-05-08T01:12:13Z")
I have used this dashboard function successfully to create different views for my system however I'm trying to add a new link labelled "Documentation" for the side bar which would access a local HTML file I created that … --- ## [Changing the text color of a disabled widget's label](https://discourse.nodered.org/t/changing-the-text-color-of-a-disabled-widgets-label/10903)
**Author:** [@kraigen](https://discourse.nodered.org/u/kraigen)\ **Replies:** 0\ **Last updated:** [7 May 2019 22:47 UTC](https://discourse.nodered.org/t/changing-the-text-color-of-a-disabled-widgets-label/10903 "2019-05-07T22:47:15Z")
Hello, everyone! In my dashboard I have switch and a button that are disabled when another switch is off and they become enabled once that "master switch" is on. I want to know if it is possible to change the color of t… --- ## [Multiple input function](https://discourse.nodered.org/t/multiple-input-function/10901)
**Author:** [@jjrivasescola](https://discourse.nodered.org/u/jjrivasescola)\ **Replies:** 2\ **Last updated:** [7 May 2019 22:03 UTC](https://discourse.nodered.org/t/multiple-input-function/10901 "2019-05-07T22:03:06Z")
Hello, Would you like to help me on my project? The input data (stored on a array) always have the same order: date1, time1, model1, date2, time2, model2, ... , dateN, timeN, modelN. I would like to compare with a fun… [Previous page](https://discourse.nodered.org/latest.md?page=1280) [Next page](https://discourse.nodered.org/latest.md?page=1282)