# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=373

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

**Page:** 374

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## [The error: this cite can't be reached when download Node-red](https://discourse.nodered.org/t/the-error-this-cite-cant-be-reached-when-download-node-red/63000)

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**Author:** [@thanhbinh](https://discourse.nodered.org/u/thanhbinh)\
**Replies:** 0\
**Last updated:** [24 May 2022 09:47 UTC](https://discourse.nodered.org/t/the-error-this-cite-cant-be-reached-when-download-node-red/63000 "2022-05-24T09:47:53Z")

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Hello everyone, I'm a student currently. I have a problem. When I connect PC and module IOT2000 to open Node-red on a browser, it shows the error on the top. when I download directly from laptop and IOT module it shows…

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## [Passing arguments into a custom node](https://discourse.nodered.org/t/passing-arguments-into-a-custom-node/62990)

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**Author:** [@Vedant](https://discourse.nodered.org/u/Vedant)\
**Replies:** 5\
**Last updated:** [24 May 2022 08:51 UTC](https://discourse.nodered.org/t/passing-arguments-into-a-custom-node/62990 "2022-05-24T08:51:52Z")

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Hello Everyone! I am trying to customize the node that I created. Right now the inject node triggers the functionality i.e. passes the argument and the custom node that I created passes the results and errors to the debu…

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## [Use global variable in http request url](https://discourse.nodered.org/t/use-global-variable-in-http-request-url/62693)

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**Author:** [@Tiramisupxl](https://discourse.nodered.org/u/Tiramisupxl)\
**Replies:** 3\
**Last updated:** [24 May 2022 08:45 UTC](https://discourse.nodered.org/t/use-global-variable-in-http-request-url/62693 "2022-05-24T08:45:38Z")

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Is there possible use global variable in url of http request node. like: http:{{global.ip}}/tset And how to use variable in websocket url? If I have many flows and use the same websocket server, how to set different w…

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## [How to disable auth for a http-in node?](https://discourse.nodered.org/t/how-to-disable-auth-for-a-http-in-node/62842)

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**Author:** [@kastyan43](https://discourse.nodered.org/u/kastyan43)\
**Replies:** 6\
**Last updated:** [24 May 2022 08:07 UTC](https://discourse.nodered.org/t/how-to-disable-auth-for-a-http-in-node/62842 "2022-05-24T08:07:21Z")

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How i can disable authorization in use node "http-in"? I want to sent data to Node-Red use GET request.

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## [How to trigger flow when context value change](https://discourse.nodered.org/t/how-to-trigger-flow-when-context-value-change/62957)

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**Author:** [@HWeber](https://discourse.nodered.org/u/HWeber)\
**Replies:** 12\
**Last updated:** [24 May 2022 07:32 UTC](https://discourse.nodered.org/t/how-to-trigger-flow-when-context-value-change/62957 "2022-05-24T07:32:01Z")

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Hello There, I'm new to node red and I have a little problem whith my flow. I recover data from a S7- 1200 in order to create csv files. I was able to create this flow but there is still somethong missing. In order…

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## [Can turn fans on/off with specific Echo, can't adjust speed](https://discourse.nodered.org/t/can-turn-fans-on-off-with-specific-echo-cant-adjust-speed/62985)

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**Author:** [@Mebejedi](https://discourse.nodered.org/u/Mebejedi)\
**Replies:** 0\
**Last updated:** [24 May 2022 02:31 UTC](https://discourse.nodered.org/t/can-turn-fans-on-off-with-specific-echo-cant-adjust-speed/62985 "2022-05-24T02:31:07Z")

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So, a friend of mine helped me create a flow that would turn specific fans on/off depending on which Echo I speak to. Therefore, "Turn on fan" in living room turns on the living room fan. Anyways, it works great...but n…

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## [Using DOMParser in a function node?](https://discourse.nodered.org/t/using-domparser-in-a-function-node/62954)

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**Author:** [@dugite-code](https://discourse.nodered.org/u/dugite-code)\
**Replies:** 2\
**Last updated:** [24 May 2022 01:13 UTC](https://discourse.nodered.org/t/using-domparser-in-a-function-node/62954 "2022-05-24T01:13:29Z")

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I'm trying to use the xpath module in a function node by adding it into the function node setup. So far so good, the main issue I'm running into is how to parse the html string output from a HTTP request for use with the…

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## [Posting form data with function](https://discourse.nodered.org/t/posting-form-data-with-function/20790)

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**Author:** [@brunoamaral](https://discourse.nodered.org/u/brunoamaral)\
**Replies:** 7\
**Last updated:** [23 May 2022 19:35 UTC](https://discourse.nodered.org/t/posting-form-data-with-function/20790 "2022-05-23T19:35:07Z")

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I'm trying to post a form to a service that receives 2 pieces of data, but for some reason the function for form data isn't working. This is the function I have so far: var payload = msg.payload; var data = { 'url': p…

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## [Oauth refresh token, best workflow?](https://discourse.nodered.org/t/oauth-refresh-token-best-workflow/62962)

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**Author:** [@lizzardguki](https://discourse.nodered.org/u/lizzardguki)\
**Replies:** 9\
**Last updated:** [23 May 2022 19:13 UTC](https://discourse.nodered.org/t/oauth-refresh-token-best-workflow/62962 "2022-05-23T19:13:25Z")

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I have a basic OAuth flow to authenticate with 3rd party API , after the authentication is successful, I use a delay node to wait for x seconds (expires\_in property - 100 seconds) and then I push the message to refresh t…

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## [Search string in array](https://discourse.nodered.org/t/search-string-in-array/62969)

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**Author:** [@azxo1](https://discourse.nodered.org/u/azxo1)\
**Replies:** 9\
**Last updated:** [23 May 2022 17:54 UTC](https://discourse.nodered.org/t/search-string-in-array/62969 "2022-05-23T17:54:54Z")

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Hello everyone! I would like to ask for help below: There are multiple objects in an array, each object has a "mac-address" variable. I would like to get the values ​​of all the "mac-address" variables on a separate li…

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## [Modbus data length error](https://discourse.nodered.org/t/modbus-data-length-error/62958)

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**Author:** [@Kaij3](https://discourse.nodered.org/u/Kaij3)\
**Replies:** 0\
**Last updated:** [23 May 2022 09:49 UTC](https://discourse.nodered.org/t/modbus-data-length-error/62958 "2022-05-23T09:49:18Z")

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Hi all, I have an IO module that i am trying to get the data via Modbus TCP, i have already installed this node-red palette Modbus node what i have done was, for the modbus server, and for Modbus Read, i have done a fe…

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## [Irrigation control](https://discourse.nodered.org/t/irrigation-control/112)

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**Author:** [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)\
**Replies:** 15\
**Last updated:** [23 May 2022 13:41 UTC](https://discourse.nodered.org/t/irrigation-control/112 "2022-05-23T13:41:26Z")

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I’ve built an ESP8266 based device which I am going to use to auto-water my greenhouse plants based upon data from it’s ‘soil humidity’ & ‘Temperature’ sensors. The device regularly sends data via MQTT to node-red, and …

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## [Node-red command in linux shell doesn't work in script](https://discourse.nodered.org/t/node-red-command-in-linux-shell-doesnt-work-in-script/62737)

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**Author:** [@Fabien1](https://discourse.nodered.org/u/Fabien1)\
**Replies:** 5\
**Last updated:** [23 May 2022 11:48 UTC](https://discourse.nodered.org/t/node-red-command-in-linux-shell-doesnt-work-in-script/62737 "2022-05-23T11:48:27Z")

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Hello, I installed Node-RED on CenOS 7 web server. Node-RED works fine, but I happen to reload the Apache server and then Node-RED. I want to write a script to reload Apache and Node-RED : # !/bin/bash systemctl rest…

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## [How do I do this?](https://discourse.nodered.org/t/how-do-i-do-this/62953)

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**Author:** [@harry747400](https://discourse.nodered.org/u/harry747400)\
**Replies:** 5\
**Last updated:** [23 May 2022 11:08 UTC](https://discourse.nodered.org/t/how-do-i-do-this/62953 "2022-05-23T11:08:06Z")

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Hello. I use home assistant on a raspberry pi, and I have node red installed as an add-on. I want to take some entities (a bunch of booleans) from home assistant and see if any of them are true (using an or gate) and t…

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## [Passing arguments to a python file using node-red](https://discourse.nodered.org/t/passing-arguments-to-a-python-file-using-node-red/62950)

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**Author:** [@Vedant](https://discourse.nodered.org/u/Vedant)\
**Replies:** 2\
**Last updated:** [23 May 2022 06:51 UTC](https://discourse.nodered.org/t/passing-arguments-to-a-python-file-using-node-red/62950 "2022-05-23T06:51:12Z")

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Hello Everyone! I have created a python file where I have written some sys.argv arguments and in a javascript file I have created a node and exported to node-red, using this js file I pass in the arguments to the pytho…

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## [Node-Red v2.2.2](https://discourse.nodered.org/t/node-red-v2-2-2/62940)

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**Author:** [@Snoussimedaziz](https://discourse.nodered.org/u/Snoussimedaziz)\
**Replies:** 2\
**Last updated:** [23 May 2022 06:44 UTC](https://discourse.nodered.org/t/node-red-v2-2-2/62940 "2022-05-23T06:44:53Z")

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i didn't find the exec node , for storing iot data on database (mariadb)

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## [Is there a way to keep the video on the first tab playing on the second tab?](https://discourse.nodered.org/t/is-there-a-way-to-keep-the-video-on-the-first-tab-playing-on-the-second-tab/62949)

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**Author:** [@jjs0426](https://discourse.nodered.org/u/jjs0426)\
**Replies:** 0\
**Last updated:** [23 May 2022 05:34 UTC](https://discourse.nodered.org/t/is-there-a-way-to-keep-the-video-on-the-first-tab-playing-on-the-second-tab/62949 "2022-05-23T05:34:33Z")

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Hey I am new to Node-Red so forgive me if this question is stupid I'd like to know how the video on the first tab is played in succession on other tabs The video template was referenced in the forum

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## [Node-red-contrib-web-worldmap & WMS servers](https://discourse.nodered.org/t/node-red-contrib-web-worldmap-wms-servers/62712)

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**Author:** [@mgottholsen](https://discourse.nodered.org/u/mgottholsen)\
**Replies:** 3\
**Last updated:** [22 May 2022 21:35 UTC](https://discourse.nodered.org/t/node-red-contrib-web-worldmap-wms-servers/62712 "2022-05-22T21:35:17Z")

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I'm looking for examples of node-red-contrib-web-worldmap, that utilizes a remote WMS server. I'm attempting to pull basemap imagery from an ArcGIS based server, that has WMS as an option, and I'm unable to get it to loa…

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## [Redirecting to a external log in page, if login is successfull go back](https://discourse.nodered.org/t/redirecting-to-a-external-log-in-page-if-login-is-successfull-go-back/62883)

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**Author:** [@CBianca](https://discourse.nodered.org/u/CBianca)\
**Replies:** 9\
**Last updated:** [22 May 2022 17:12 UTC](https://discourse.nodered.org/t/redirecting-to-a-external-log-in-page-if-login-is-successfull-go-back/62883 "2022-05-22T17:12:19Z")

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Hello guys, I want to create a flow that does this thing: Click a button from the ui The button redirects to a website that asks you to log in. This is the site: https://login.upb.ro/auth/realms/UPB/protocol/openid-…

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## [Influx question about WHERE time \>](https://discourse.nodered.org/t/influx-question-about-where-time/62919)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 2\
**Last updated:** [22 May 2022 12:44 UTC](https://discourse.nodered.org/t/influx-question-about-where-time/62919 "2022-05-22T12:44:11Z")

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Hello i have a query SELECT MIN(temp\_mix) as MaMeMi24hd\_MIN FROM spez\_days WHERE time \> now()-30d which works like this. But would it be possible to have something like WHERE time = this Month or WHERE time \> now…

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## [Can Not Get Float value from Energy Meter using Modbus RTU serial](https://discourse.nodered.org/t/can-not-get-float-value-from-energy-meter-using-modbus-rtu-serial/62921)

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**Author:** [@alpesh](https://discourse.nodered.org/u/alpesh)\
**Replies:** 19\
**Last updated:** [22 May 2022 09:34 UTC](https://discourse.nodered.org/t/can-not-get-float-value-from-energy-meter-using-modbus-rtu-serial/62921 "2022-05-22T09:34:54Z")

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I am unable to Get Float value from Energy Meter using Modbus RTU serial. I am getting completely wrong value.

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## [Waiting for node to be registerd](https://discourse.nodered.org/t/waiting-for-node-to-be-registerd/62824)

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**Author:** [@PiMo131](https://discourse.nodered.org/u/PiMo131)\
**Replies:** 3\
**Last updated:** [22 May 2022 06:51 UTC](https://discourse.nodered.org/t/waiting-for-node-to-be-registerd/62824 "2022-05-22T06:51:50Z")

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Hi guys, when i am moving my flows from one computer to the next I get first the below error in the terminal: After which I checked the versions of both node-red versions and the UI-Table node... I noticed an error i…

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## [Shortcuts for Monaco editor](https://discourse.nodered.org/t/shortcuts-for-monaco-editor/62855)

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**Author:** [@hazymat](https://discourse.nodered.org/u/hazymat)\
**Replies:** 3\
**Last updated:** [22 May 2022 06:31 UTC](https://discourse.nodered.org/t/shortcuts-for-monaco-editor/62855 "2022-05-22T06:31:43Z")

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Question about the Monaco text editor, apologies if this is somewhat off-topic, please remove my post if so. But last year when this was added, I noted here on the forums, and possibly by raising an issue separately, th…

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## [Flow meters for water supply suggestions](https://discourse.nodered.org/t/flow-meters-for-water-supply-suggestions/62918)

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**Author:** [@9toejack](https://discourse.nodered.org/u/9toejack)\
**Replies:** 0\
**Last updated:** [21 May 2022 18:58 UTC](https://discourse.nodered.org/t/flow-meters-for-water-supply-suggestions/62918 "2022-05-21T18:58:45Z")

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Hey everyone, I am having an issue with the building I'm in using excessive water, the landlords are talking about adding meters to the units. I want to add one myself but connect to raspberry pi or an esp8266. does any…

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## [How to use/access a message variable to navigate an array with a JSONata expression in a switch node?](https://discourse.nodered.org/t/how-to-use-access-a-message-variable-to-navigate-an-array-with-a-jsonata-expression-in-a-switch-node/62907)

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**Author:** [@janedoe123](https://discourse.nodered.org/u/janedoe123)\
**Replies:** 6\
**Last updated:** [21 May 2022 11:54 UTC](https://discourse.nodered.org/t/how-to-use-access-a-message-variable-to-navigate-an-array-with-a-jsonata-expression-in-a-switch-node/62907 "2022-05-21T11:54:34Z")

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Hello all, I'm struggling trying to use/access a message variable to navigate an array with a JSONata expression in a switch node. The message variable is "index", and is well declared. I've tried all I could, but it …

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## [Try to control a 2nd Onkyo device with node-red-contrib-eiscp](https://discourse.nodered.org/t/try-to-control-a-2nd-onkyo-device-with-node-red-contrib-eiscp/62807)

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**Author:** [@F150](https://discourse.nodered.org/u/F150)\
**Replies:** 3\
**Last updated:** [21 May 2022 11:04 UTC](https://discourse.nodered.org/t/try-to-control-a-2nd-onkyo-device-with-node-red-contrib-eiscp/62807 "2022-05-21T11:04:24Z")

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Hello, I try to control a second Onkyo device with another Homematic IP wallswitch HmIP-WRC6. The first Onkyo multiroom speaker works fine but it's not possible to create a new flow for the next speaker. I created the…

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## [Multiple Messages on different outputs with delay](https://discourse.nodered.org/t/multiple-messages-on-different-outputs-with-delay/62911)

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**Author:** [@sahsha](https://discourse.nodered.org/u/sahsha)\
**Replies:** 3\
**Last updated:** [21 May 2022 10:34 UTC](https://discourse.nodered.org/t/multiple-messages-on-different-outputs-with-delay/62911 "2022-05-21T10:34:00Z")

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Help! I need to get output with delay for each msg. var msg1 = { payload:"first out of output 1" }; var msg2 = { payload:"second out of output 1" }; var msg3 = { payload:"third out of output 1" }; var msg4 = { payload:"…

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## [Multiple node-red instances sharing data directory](https://discourse.nodered.org/t/multiple-node-red-instances-sharing-data-directory/62902)

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**Author:** [@Vincent-BePressure](https://discourse.nodered.org/u/Vincent-BePressure)\
**Replies:** 1\
**Last updated:** [21 May 2022 08:04 UTC](https://discourse.nodered.org/t/multiple-node-red-instances-sharing-data-directory/62902 "2022-05-21T08:04:14Z")

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I have several node-red instances that all share the exact same flows. The flows are written in such a way that every difference uses environment variables pushed in using docker. For example, they each subscribe to uniq…

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## [Sometime "S7 in" node failed to read data from S7-1200 PLC](https://discourse.nodered.org/t/sometime-s7-in-node-failed-to-read-data-from-s7-1200-plc/62904)

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**Author:** [@Janu](https://discourse.nodered.org/u/Janu)\
**Replies:** 0\
**Last updated:** [21 May 2022 06:46 UTC](https://discourse.nodered.org/t/sometime-s7-in-node-failed-to-read-data-from-s7-1200-plc/62904 "2022-05-21T06:46:34Z")

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Hello everyone, I have a difficult point with "S7 IN" node when I read data from S7-1200 PLC via IOT2040. Normally I can read data from PLC by using "S7 IN" node, but sometime the "S7 IN" node can post an error message…

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## [How to copy files onto node red using win scp](https://discourse.nodered.org/t/how-to-copy-files-onto-node-red-using-win-scp/62866)

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**Author:** [@sn19](https://discourse.nodered.org/u/sn19)\
**Replies:** 7\
**Last updated:** [21 May 2022 06:16 UTC](https://discourse.nodered.org/t/how-to-copy-files-onto-node-red-using-win-scp/62866 "2022-05-21T06:16:49Z")

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Hello. I am trying to copy a proto file from my documents to node red running at 127.0.0.1 What do I use for username and password in the win scp to access node red? please let me know about it and thank you .

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