# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=786

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

**Page:** 787

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## [\[Solved\] Running as a service on windows](https://discourse.nodered.org/t/solved-running-as-a-service-on-windows/22683)

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**Author:** [@dathor](https://discourse.nodered.org/u/dathor)\
**Replies:** 5\
**Last updated:** [6 March 2020 05:30 UTC](https://discourse.nodered.org/t/solved-running-as-a-service-on-windows/22683 "2020-03-06T05:30:50Z")

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Hello I would like to ask for some help regarding running my node-red project as a service on a windows machine. To date i have followed the instructions that were provided (on the faq) in the below link. There were a…

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## [Can't deploy in production - "can not read property credentials of null"](https://discourse.nodered.org/t/cant-deploy-in-production-can-not-read-property-credentials-of-null/22680)

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**Author:** [@etawyy](https://discourse.nodered.org/u/etawyy)\
**Replies:** 1\
**Last updated:** [5 March 2020 21:45 UTC](https://discourse.nodered.org/t/cant-deploy-in-production-can-not-read-property-credentials-of-null/22680 "2020-03-05T21:45:38Z")

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Hi there, I have 2 environments deployed in bluemix/IBM cloud: -Development: 1xnode-red instance + 1xCloudant instance -Production: 1xnode-red instance + 1xCloudant instance Things run fine, the instances are connect…

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## [Npm function @network-utils/arp-lookup weird Promise output](https://discourse.nodered.org/t/npm-function-network-utils-arp-lookup-weird-promise-output/22412)

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**Author:** [@GravityRZ](https://discourse.nodered.org/u/GravityRZ)\
**Replies:** 27\
**Last updated:** [5 March 2020 21:39 UTC](https://discourse.nodered.org/t/npm-function-network-utils-arp-lookup-weird-promise-output/22412 "2020-03-05T21:39:10Z")

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hello, i am using the npm function node to use a function called @network-utils/arp-lookup this function should have a couple of options to get an ip from the corresponding mac address or a mac address from the correspo…

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## [Can Not Install Contrib\_User](https://discourse.nodered.org/t/can-not-install-contrib-user/22661)

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**Author:** [@alpesh](https://discourse.nodered.org/u/alpesh)\
**Replies:** 3\
**Last updated:** [5 March 2020 18:56 UTC](https://discourse.nodered.org/t/can-not-install-contrib-user/22661 "2020-03-05T18:56:08Z")

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Dear all I can not install Contrib\_User Palette. I am getting Lots of error . Check my attach file. Suggest me how can i correct.

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## [Extract two values from mqtt message(json type) and create a new mqtt with these two](https://discourse.nodered.org/t/extract-two-values-from-mqtt-message-json-type-and-create-a-new-mqtt-with-these-two/22512)

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**Author:** [@megamarco83](https://discourse.nodered.org/u/megamarco83)\
**Replies:** 37\
**Last updated:** [5 March 2020 16:48 UTC](https://discourse.nodered.org/t/extract-two-values-from-mqtt-message-json-type-and-create-a-new-mqtt-with-these-two/22512 "2020-03-05T16:48:31Z")

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Hi, i would like to implement something like this: receiving messages from mqtt subscription at: domoticz/out of course many messages in json format will arrive but i want to filter some messages inparticular. from th…

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## [Sonoff T0 switch and nodered](https://discourse.nodered.org/t/sonoff-t0-switch-and-nodered/22654)

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**Author:** [@sniperxnl](https://discourse.nodered.org/u/sniperxnl)\
**Replies:** 41\
**Last updated:** [5 March 2020 16:43 UTC](https://discourse.nodered.org/t/sonoff-t0-switch-and-nodered/22654 "2020-03-05T16:43:02Z")

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Guys, my situation is, have sonoff T0 switch that activate/diactivate my main light, but i have also a led strip that is placed and activated by a sonoff switch, all flashed with tasmota and visible with mqtt What i w…

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## [Inject node with input](https://discourse.nodered.org/t/inject-node-with-input/22662)

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**Author:** [@tukru](https://discourse.nodered.org/u/tukru)\
**Replies:** 1\
**Last updated:** [5 March 2020 15:32 UTC](https://discourse.nodered.org/t/inject-node-with-input/22662 "2020-03-05T15:32:45Z")

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Hi all, I need to send a mail every X hours. I was thinking to make it using the inject node that comes by default with node-red. The problem is I have to pass the number of hours to the inject node because it could be …

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## [Published node-red-contrib... not visible](https://discourse.nodered.org/t/published-node-red-contrib-not-visible/22664)

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**Author:** [@grodansparadis](https://discourse.nodered.org/u/grodansparadis)\
**Replies:** 2\
**Last updated:** [5 March 2020 14:56 UTC](https://discourse.nodered.org/t/published-node-red-contrib-not-visible/22664 "2020-03-05T14:56:46Z")

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I have some node-red-contrib... nodes published. One of them (node-red-contrib-vscp) no longer is visible if I try to install it from the manage palette. Install OK if I install it manually. Why is that?

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## [Can't get NodeRED running alongside HOOBS - despite it seemingly installing correctly](https://discourse.nodered.org/t/cant-get-nodered-running-alongside-hoobs-despite-it-seemingly-installing-correctly/22467)

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**Author:** [@LiamMadyam](https://discourse.nodered.org/u/LiamMadyam)\
**Replies:** 3\
**Last updated:** [5 March 2020 14:04 UTC](https://discourse.nodered.org/t/cant-get-nodered-running-alongside-hoobs-despite-it-seemingly-installing-correctly/22467 "2020-03-05T14:04:21Z")

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Hi, I've setting up Homebridge for a pal of mine. He's got a RPi 4 running latest version of HOOBS. They helpfully provide an install script to run to install NodeRED to run alongside it. Installed it and it confirmed i…

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## [Where is node red installed on Linux](https://discourse.nodered.org/t/where-is-node-red-installed-on-linux/22658)

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**Author:** [@Furkanos](https://discourse.nodered.org/u/Furkanos)\
**Replies:** 2\
**Last updated:** [5 March 2020 12:48 UTC](https://discourse.nodered.org/t/where-is-node-red-installed-on-linux/22658 "2020-03-05T12:48:49Z")

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Hey i dont know how to find the folder where node red is installed.

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## [MQTT Toggle, to change ZWAVE Bulb state](https://discourse.nodered.org/t/mqtt-toggle-to-change-zwave-bulb-state/22618)

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**Author:** [@billiaz](https://discourse.nodered.org/u/billiaz)\
**Replies:** 17\
**Last updated:** [5 March 2020 12:30 UTC](https://discourse.nodered.org/t/mqtt-toggle-to-change-zwave-bulb-state/22618 "2020-03-05T12:30:45Z")

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I am pretty new in Node-Red, I'm driven here because Home Assistant's automation is slow. I made my first flow! and want to make sure I didn't ignore some basics of Node Red and didn't overcomplicate Scenario: I have …

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## [Enable schedule using HueMagic](https://discourse.nodered.org/t/enable-schedule-using-huemagic/22646)

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**Author:** [@Harpau](https://discourse.nodered.org/u/Harpau)\
**Replies:** 3\
**Last updated:** [5 March 2020 09:50 UTC](https://discourse.nodered.org/t/enable-schedule-using-huemagic/22646 "2020-03-05T09:50:32Z")

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I have a schedule named "TV mimicking" stored on my hue bridge and would like to enable/disable it using HueMagic. Is this possible? Many thanks, Harald

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## [Node-Red MQTT node doesnt connect on every first start every morning?](https://discourse.nodered.org/t/node-red-mqtt-node-doesnt-connect-on-every-first-start-every-morning/22485)

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**Author:** [@hsn548](https://discourse.nodered.org/u/hsn548)\
**Replies:** 16\
**Last updated:** [5 March 2020 09:49 UTC](https://discourse.nodered.org/t/node-red-mqtt-node-doesnt-connect-on-every-first-start-every-morning/22485 "2020-03-05T09:49:09Z")

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Hello everyone, I am having really strange problem and i am not able to understand why is it happening. I am saving the MQTT credentials in settings.js process.env. I am using google cloud iot so i need a jwt to conne…

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## [How to handle data from dwd weather node](https://discourse.nodered.org/t/how-to-handle-data-from-dwd-weather-node/22649)

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**Author:** [@Thomas6789](https://discourse.nodered.org/u/Thomas6789)\
**Replies:** 2\
**Last updated:** [5 March 2020 08:38 UTC](https://discourse.nodered.org/t/how-to-handle-data-from-dwd-weather-node/22649 "2020-03-05T08:38:52Z")

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Hi, I'm new here and it's my first experience with Node-Red. What I'd like to do is to show the current temperature or windspeed data of the DWD weather node (https://flows.nodered.org/node/node-red-contrib-dwd-local-we…

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## [Python3-function issue](https://discourse.nodered.org/t/python3-function-issue/22578)

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**Author:** [@samirpl](https://discourse.nodered.org/u/samirpl)\
**Replies:** 12\
**Last updated:** [5 March 2020 05:26 UTC](https://discourse.nodered.org/t/python3-function-issue/22578 "2020-03-05T05:26:05Z")

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When using python3-function node, I'm always seeing the error below when running any code. For testing purposes, I just used the line "print("test")" in my python3-function node. I'd like to know if anyone has dealed …

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## [From sqlite to json format](https://discourse.nodered.org/t/from-sqlite-to-json-format/22227)

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**Author:** [@NODE777](https://discourse.nodered.org/u/NODE777)\
**Replies:** 25\
**Last updated:** [5 March 2020 03:15 UTC](https://discourse.nodered.org/t/from-sqlite-to-json-format/22227 "2020-03-05T03:15:26Z")

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I'm trying to read data from sqlite db previously storage with sqlite node then process that info to chart it in node red. I been read the following info but I don't quite understand what type of node red file I woul…

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## [Gauge colour depends on its group visibility-initial state](https://discourse.nodered.org/t/gauge-colour-depends-on-its-group-visibility-initial-state/22581)

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**Author:** [@techraf](https://discourse.nodered.org/u/techraf)\
**Replies:** 3\
**Last updated:** [4 March 2020 19:21 UTC](https://discourse.nodered.org/t/gauge-colour-depends-on-its-group-visibility-initial-state/22581 "2020-03-04T19:21:23Z")

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I observe a pretty strange behaviour with a gauge in which I reversed the value range. I know... min:5 max:0 settings look awkward, but the gauge generally works as expected and counts down to zero. \[{"id":"55da1325.…

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## [Starting without switch](https://discourse.nodered.org/t/starting-without-switch/22385)

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**Author:** [@Anurag](https://discourse.nodered.org/u/Anurag)\
**Replies:** 22\
**Last updated:** [4 March 2020 17:55 UTC](https://discourse.nodered.org/t/starting-without-switch/22385 "2020-03-04T17:55:07Z")

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Hi i am using node-red first time i simply just wanna on off led as much i read about that i did same but i did not find any result , i took a inject node payload =string=1 Topic=off other i took rpi.gpio.out …

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## [How to dynamically change node property?](https://discourse.nodered.org/t/how-to-dynamically-change-node-property/22628)

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**Author:** [@jchen5057](https://discourse.nodered.org/u/jchen5057)\
**Replies:** 1\
**Last updated:** [4 March 2020 17:33 UTC](https://discourse.nodered.org/t/how-to-dynamically-change-node-property/22628 "2020-03-04T17:33:05Z")

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How to dynamically change server IP address? say if I have a modbus, there is a "Server dropdown" box to select the server, can I pass "msg.Server" to select it? In the Server configuration, can I pass msg.Host and msg…

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## [Timetable sending email](https://discourse.nodered.org/t/timetable-sending-email/22604)

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**Author:** [@ilarioq](https://discourse.nodered.org/u/ilarioq)\
**Replies:** 4\
**Last updated:** [4 March 2020 16:48 UTC](https://discourse.nodered.org/t/timetable-sending-email/22604 "2020-03-04T16:48:09Z")

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Hey, everybody, I put the mail-out node after the rpids18b20 node. the injection node updates. every 5 minutes, and the dashboard updates correctly with the read data. The email is sent a bit randomly, about one every …

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## [Add a Timestamp to Function node](https://discourse.nodered.org/t/add-a-timestamp-to-function-node/22610)

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**Author:** [@Job-Hoogeboom](https://discourse.nodered.org/u/Job-Hoogeboom)\
**Replies:** 7\
**Last updated:** [4 March 2020 16:27 UTC](https://discourse.nodered.org/t/add-a-timestamp-to-function-node/22610 "2020-03-04T16:27:03Z")

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Hi! I'm using the following flow to read a Modbus power meter Flow 2, this is the string in the function node Function node. I would like to add a time format to the msg.payload. something like this {"Time": 2020-03-0…

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## [MySQL return string](https://discourse.nodered.org/t/mysql-return-string/21971)

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**Author:** [@gbuurman](https://discourse.nodered.org/u/gbuurman)\
**Replies:** 19\
**Last updated:** [4 March 2020 15:59 UTC](https://discourse.nodered.org/t/mysql-return-string/21971 "2020-03-04T15:59:02Z")

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Hi all - a very good morning, another day and another issue. I want to return a SQL statement result return string to a soap server. But no success till so far. I can receive a message from SQL in my debug node, that's …

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## [Exec node (shellexecute)](https://discourse.nodered.org/t/exec-node-shellexecute/22607)

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**Author:** [@bibou](https://discourse.nodered.org/u/bibou)\
**Replies:** 10\
**Last updated:** [4 March 2020 15:18 UTC](https://discourse.nodered.org/t/exec-node-shellexecute/22607 "2020-03-04T15:18:19Z")

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Hello everybody, I want to ask you someting. I want to use "Exec" node and use the command line "shellexecute' but I don't know how to do that. The aim of that is to open Chrome and open a http inside. Someone know how ?…

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## [Problem to display state from device](https://discourse.nodered.org/t/problem-to-display-state-from-device/22484)

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**Author:** [@jan-k](https://discourse.nodered.org/u/jan-k)\
**Replies:** 28\
**Last updated:** [4 March 2020 09:54 UTC](https://discourse.nodered.org/t/problem-to-display-state-from-device/22484 "2020-03-04T09:54:44Z")

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Greetings, I am still fresh to the Node Red, seeking for some help for displaying the status of my S7-1200 PLC with the node-red-contrib-ui-state-trail. It can be display when the S7 is sending value, so I am able to u…

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## [Dashboard notification node in subflow?](https://discourse.nodered.org/t/dashboard-notification-node-in-subflow/22606)

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**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 2\
**Last updated:** [4 March 2020 09:10 UTC](https://discourse.nodered.org/t/dashboard-notification-node-in-subflow/22606 "2020-03-04T09:10:21Z")

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I know that generally one cannot put Dashboard nodes in a subflow, but is the Notification node (OK/Cancel) and exception to this? I have tried it and it seems to work ok, even with two instances of the subflow both sho…

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## [Problems with node-red-contrib-google](https://discourse.nodered.org/t/problems-with-node-red-contrib-google/22445)

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**Author:** [@HArndt2020](https://discourse.nodered.org/u/HArndt2020)\
**Replies:** 10\
**Last updated:** [4 March 2020 08:25 UTC](https://discourse.nodered.org/t/problems-with-node-red-contrib-google/22445 "2020-03-04T08:25:12Z")

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i don´t no what should i insert in JSON and scope:

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## [Problem in Sim800L Http connectivity when httpNodeAuth Activated](https://discourse.nodered.org/t/problem-in-sim800l-http-connectivity-when-httpnodeauth-activated/22591)

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**Author:** [@iotdevv](https://discourse.nodered.org/u/iotdevv)\
**Replies:** 1\
**Last updated:** [3 March 2020 23:50 UTC](https://discourse.nodered.org/t/problem-in-sim800l-http-connectivity-when-httpnodeauth-activated/22591 "2020-03-03T23:50:19Z")

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hello i have a problem with http post/get methods with Sim800L module i enabled httpNodeAuth to protect http connection with a user/pass i tested post/get methods with Postman and i get 200/Ok response but with sim80…

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## [Global var Time not recalling properly](https://discourse.nodered.org/t/global-var-time-not-recalling-properly/22586)

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**Author:** [@spyder0552](https://discourse.nodered.org/u/spyder0552)\
**Replies:** 1\
**Last updated:** [3 March 2020 21:36 UTC](https://discourse.nodered.org/t/global-var-time-not-recalling-properly/22586 "2020-03-03T21:36:40Z")

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I have a input box on my dashboard with the mode set to time picker. I pass that value into a function which then stores it as a global variable (using the local file system). global.set('ShiftEnd1',msg.payload); retu…

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## [Create function with multiple outputs send in a sequence](https://discourse.nodered.org/t/create-function-with-multiple-outputs-send-in-a-sequence/22587)

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**Author:** [@gschmidt](https://discourse.nodered.org/u/gschmidt)\
**Replies:** 0\
**Last updated:** [3 March 2020 21:23 UTC](https://discourse.nodered.org/t/create-function-with-multiple-outputs-send-in-a-sequence/22587 "2020-03-03T21:23:30Z")

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Hi, I am creating an Alarm Clock using the castv2 node. A function node (advised by castv2 maker) is used to send a message in a special format to the Google Home device(s). Each message contains a command to control …

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## [Getting undefined error in flow.get](https://discourse.nodered.org/t/getting-undefined-error-in-flow-get/22582)

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**Author:** [@GravityRZ](https://discourse.nodered.org/u/GravityRZ)\
**Replies:** 3\
**Last updated:** [3 March 2020 20:38 UTC](https://discourse.nodered.org/t/getting-undefined-error-in-flow-get/22582 "2020-03-03T20:38:34Z")

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Hello, i work with flow.get and global.get a lot however i get an error in the currrent flow but do not see anything wrong de output is undefined but it should state up (the value of network.192.168.1.25.ipstate i su…

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