# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=826

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

**Page:** 827

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## [Can't Connect database mysql](https://discourse.nodered.org/t/cant-connect-database-mysql/17988)

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**Author:** [@madihatunn](https://discourse.nodered.org/u/madihatunn)\
**Replies:** 5\
**Last updated:** [15 November 2019 16:35 UTC](https://discourse.nodered.org/t/cant-connect-database-mysql/17988 "2019-11-15T16:35:15Z")

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hi:) i wanna ask something. i have problem when i try to insert my value sensor or input to database mysql. some error show on this picture. how can i fix it? can help me please?? what should i do? thank you

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## [Node Red - connectivity to Watson](https://discourse.nodered.org/t/node-red-connectivity-to-watson/18006)

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**Author:** [@JaredG](https://discourse.nodered.org/u/JaredG)\
**Replies:** 0\
**Last updated:** [15 November 2019 14:55 UTC](https://discourse.nodered.org/t/node-red-connectivity-to-watson/18006 "2019-11-15T14:55:23Z")

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HI, We have two deployments of Node Red: in the IBM Watson environment local PC Both Node Reds have node-red-contrib-scx-ibmiotapp (using the "ibmiot in" node for connectivity) We have noted that Node Red says it is…

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## [How to send data with null character to a Serial port?](https://discourse.nodered.org/t/how-to-send-data-with-null-character-to-a-serial-port/17986)

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**Author:** [@iono](https://discourse.nodered.org/u/iono)\
**Replies:** 4\
**Last updated:** [15 November 2019 13:44 UTC](https://discourse.nodered.org/t/how-to-send-data-with-null-character-to-a-serial-port/17986 "2019-11-15T13:44:54Z")

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Hi, I am new to Node-Red and is trying things around. I have a ToF sensor that will send distance data only if it is activated by sending a specific set of bytes to it. On node.js, this is how it is done: function act…

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## [Configuration Node without Edit-Button](https://discourse.nodered.org/t/configuration-node-without-edit-button/17947)

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**Author:** [@stamer](https://discourse.nodered.org/u/stamer)\
**Replies:** 6\
**Last updated:** [15 November 2019 13:10 UTC](https://discourse.nodered.org/t/configuration-node-without-edit-button/17947 "2019-11-15T13:10:34Z")

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Hey, I have some custom nodes implemented and I have a problem with node-red configuration node on Linux. The Edit-Button next to the dropdown (see the picture below) is missing at the first load of the node. If I click…

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## [Can connect http in / out with OPC UA system](https://discourse.nodered.org/t/can-connect-http-in-out-with-opc-ua-system/17997)

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**Author:** [@ubuntitiCH](https://discourse.nodered.org/u/ubuntitiCH)\
**Replies:** 0\
**Last updated:** [15 November 2019 12:25 UTC](https://discourse.nodered.org/t/can-connect-http-in-out-with-opc-ua-system/17997 "2019-11-15T12:25:50Z")

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Hi, I'm using opcua-contrib and opcua-IIOT-contrib. My goal is to use a http in to: Returning the variables available Returning the value of a nameId in url parameter Till now I can set the target and if I use the no…

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## [MaxMin Thermometer reset](https://discourse.nodered.org/t/maxmin-thermometer-reset/10772)

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**Author:** [@Sean](https://discourse.nodered.org/u/Sean)\
**Replies:** 14\
**Last updated:** [15 November 2019 11:53 UTC](https://discourse.nodered.org/t/maxmin-thermometer-reset/10772 "2019-11-15T11:53:27Z")

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Hi, Been trying to set up a max-min thermometer using node red (ESP32/DHT22/MQTT/RPi3(please bear with me, I'm new at this)). I need a reset button for the max and min gauges, so used a button to fire a function node s…

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## [TCP Timeout error when using node-red-contrib-tplink-iot](https://discourse.nodered.org/t/tcp-timeout-error-when-using-node-red-contrib-tplink-iot/17784)

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**Author:** [@rollischulze67](https://discourse.nodered.org/u/rollischulze67)\
**Replies:** 4\
**Last updated:** [15 November 2019 08:00 UTC](https://discourse.nodered.org/t/tcp-timeout-error-when-using-node-red-contrib-tplink-iot/17784 "2019-11-15T08:00:39Z")

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With the code below, I succeeded to realize an own function node for a tp-link HS100 plug drectly with the tplink api. In this way, I can get and set the status of the plug and have no TCP Timeout-Error-Messages anymore.…

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## [How to use redlink](https://discourse.nodered.org/t/how-to-use-redlink/17929)

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**Author:** [@MaoMao](https://discourse.nodered.org/u/MaoMao)\
**Replies:** 4\
**Last updated:** [15 November 2019 00:57 UTC](https://discourse.nodered.org/t/how-to-use-redlink/17929 "2019-11-15T00:57:48Z")

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node-red-contrib-redlink There's an explanation for this node but I really don't understand how it's used, how it communicates, how it sends tasks to other processes to be executed, has anybody used it or knows about it, …

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## [Admin HTTP API POST /flows -- FORCE MERGE](https://discourse.nodered.org/t/admin-http-api-post-flows-force-merge/17980)

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**Author:** [@scubachristopher](https://discourse.nodered.org/u/scubachristopher)\
**Replies:** 3\
**Last updated:** [14 November 2019 23:40 UTC](https://discourse.nodered.org/t/admin-http-api-post-flows-force-merge/17980 "2019-11-14T23:40:00Z")

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Hi, I am programmatically adding a subflow reference when needed. I'm pulling the current flows, adding my reference, then POSTing back to /flows. In the GUI, it asks to merge (there are no conflicts). Is there a way…

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## [Is there any way for me to upgrade my Node-RED JSONata to v1.7?](https://discourse.nodered.org/t/is-there-any-way-for-me-to-upgrade-my-node-red-jsonata-to-v1-7/17972)

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**Author:** [@jtmoderate876](https://discourse.nodered.org/u/jtmoderate876)\
**Replies:** 4\
**Last updated:** [14 November 2019 22:37 UTC](https://discourse.nodered.org/t/is-there-any-way-for-me-to-upgrade-my-node-red-jsonata-to-v1-7/17972 "2019-11-14T22:37:59Z")

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I would like to use the $distinct() functionality added to JSONata v1.7

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## [Playing HTTP audio stream](https://discourse.nodered.org/t/playing-http-audio-stream/17969)

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**Author:** [@rlongfield](https://discourse.nodered.org/u/rlongfield)\
**Replies:** 0\
**Last updated:** [14 November 2019 18:23 UTC](https://discourse.nodered.org/t/playing-http-audio-stream/17969 "2019-11-14T18:23:40Z")

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I am trying to play an HTTP stream out to a chromecast device. I have an http request setup as: Method : Get URL: http://live.leanstream.co/CFNYFM-MP3 Return: a binary buffer I have a Change node followed by a castv…

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## [Install node with Palette or Local (Git cloned), issue](https://discourse.nodered.org/t/install-node-with-palette-or-local-git-cloned-issue/17956)

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**Author:** [@SuperNinja](https://discourse.nodered.org/u/SuperNinja)\
**Replies:** 1\
**Last updated:** [14 November 2019 13:25 UTC](https://discourse.nodered.org/t/install-node-with-palette-or-local-git-cloned-issue/17956 "2019-11-14T13:25:03Z")

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Hi all, I use Node Red Desktop by @sakazuki, run with NR 1.0.2 and some stuf in a Win10 PC (1903 with last update) : Example : i re-instal Node Red Desktop on a new Win10 partition and import a flow with missing nod…

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## [\[solved\] Deploy my flow changes leads to connection lost](https://discourse.nodered.org/t/solved-deploy-my-flow-changes-leads-to-connection-lost/17936)

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**Author:** [@WhiteLion](https://discourse.nodered.org/u/WhiteLion)\
**Replies:** 2\
**Last updated:** [14 November 2019 11:57 UTC](https://discourse.nodered.org/t/solved-deploy-my-flow-changes-leads-to-connection-lost/17936 "2019-11-14T11:57:56Z")

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Hiho, after my flows grow I realized that more and more often after deploy button my raspi 3B+ loses WifFi connection. I have to wait for reconnection and "check changes" ... than deploy again. I guess that it has to do…

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## [Where can I read Node Red logs?](https://discourse.nodered.org/t/where-can-i-read-node-red-logs/7698)

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**Author:** [@Barabba11](https://discourse.nodered.org/u/Barabba11)\
**Replies:** 20\
**Last updated:** [14 November 2019 10:49 UTC](https://discourse.nodered.org/t/where-can-i-read-node-red-logs/7698 "2019-11-14T10:49:29Z")

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Hi! I'm sure soeone esle has already asked about this in past, but googling it I can't find a proper answer, also searching here in the forum. THis night my Raspberry for the first time had a problem, the IP protocol st…

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## [Do you consider it best practice to "keep flows vanilla?"](https://discourse.nodered.org/t/do-you-consider-it-best-practice-to-keep-flows-vanilla/17772)

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**Author:** [@JayDickson](https://discourse.nodered.org/u/JayDickson)\
**Replies:** 25\
**Last updated:** [14 November 2019 09:26 UTC](https://discourse.nodered.org/t/do-you-consider-it-best-practice-to-keep-flows-vanilla/17772 "2019-11-14T09:26:57Z")

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I often find myself striving as often as possible to use nodes that come packaged in the initial install on flows that are in production use. This got me wondering if maybe I'm fussing over nothing, or if maybe this coul…

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## [Tried to install a third party node and this is what I get](https://discourse.nodered.org/t/tried-to-install-a-third-party-node-and-this-is-what-i-get/17868)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 6\
**Last updated:** [14 November 2019 09:03 UTC](https://discourse.nodered.org/t/tried-to-install-a-third-party-node-and-this-is-what-i-get/17868 "2019-11-14T09:03:09Z")

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From another thread, I am trying to install a node: VLC remote control The node isn't in the library, so I tried from the CLI. This is what I get: me@me-desktop:~/.node-red$ npm install vlc-rc-socket npm WARN bootstr…

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## [Shutdown an Enigma-Receiver via Node Red](https://discourse.nodered.org/t/shutdown-an-enigma-receiver-via-node-red/17827)

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**Author:** [@Smarty](https://discourse.nodered.org/u/Smarty)\
**Replies:** 4\
**Last updated:** [14 November 2019 08:14 UTC](https://discourse.nodered.org/t/shutdown-an-enigma-receiver-via-node-red/17827 "2019-11-14T08:14:20Z")

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I want to shut down my Dreambox via Node Red. The suhtdown command shutdown -h now via command works wonderfully. But I'm currently not clear how I can make remotely via Node Red. Is there a node I can do that with?

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## [Nodered docker mdns lookup](https://discourse.nodered.org/t/nodered-docker-mdns-lookup/17920)

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**Author:** [@marcusone](https://discourse.nodered.org/u/marcusone)\
**Replies:** 0\
**Last updated:** [14 November 2019 00:49 UTC](https://discourse.nodered.org/t/nodered-docker-mdns-lookup/17920 "2019-11-14T00:49:34Z")

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How can I enable MDNS inside the standard node-red docker? I would like to be able to use '.local' domains inside node-red http nodes, but I keep getting a "not found" error for the domain name 'example-mdns.local' Tha…

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## [Distributed NodeRed and MQTT](https://discourse.nodered.org/t/distributed-nodered-and-mqtt/17845)

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**Author:** [@davide16](https://discourse.nodered.org/u/davide16)\
**Replies:** 6\
**Last updated:** [13 November 2019 22:41 UTC](https://discourse.nodered.org/t/distributed-nodered-and-mqtt/17845 "2019-11-13T22:41:00Z")

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Hi all, I want to use Distributed NodeRed, in which the flow should execute on devices transparently communicating between them using the MQTT server configured in the wire node in dist-wire.js . Do you know how th…

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## [Modbus RTU and Ascii RS485 commands on the same bus](https://discourse.nodered.org/t/modbus-rtu-and-ascii-rs485-commands-on-the-same-bus/17900)

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**Author:** [@sTem](https://discourse.nodered.org/u/sTem)\
**Replies:** 0\
**Last updated:** [13 November 2019 15:07 UTC](https://discourse.nodered.org/t/modbus-rtu-and-ascii-rs485-commands-on-the-same-bus/17900 "2019-11-13T15:07:52Z")

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Hi, We have a RS485 network with some Modbus RTU sensors and some anemometers that respond to a Asci telegram straight to the bus. I'm looking to find a way to use both protocols on the same bus. So first pol all the a…

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## [Impossible to install node modules (such as node-red-node-mysql](https://discourse.nodered.org/t/impossible-to-install-node-modules-such-as-node-red-node-mysql/17818)

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**Author:** [@971JMD](https://discourse.nodered.org/u/971JMD)\
**Replies:** 5\
**Last updated:** [13 November 2019 14:59 UTC](https://discourse.nodered.org/t/impossible-to-install-node-modules-such-as-node-red-node-mysql/17818 "2019-11-13T14:59:27Z")

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bonjour impossible to install node modules (such as node-red-node-mysql pi@raspberrypi:~ $ node -v v12.13.0 pi@raspberrypi:~ $ uname -m armv7l pi@raspberrypi:~ $ npm install node-red-node-mysql npm ERR! code EAI\_AG…

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## [Help with Elapsed Time](https://discourse.nodered.org/t/help-with-elapsed-time/17855)

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**Author:** [@Ki-va](https://discourse.nodered.org/u/Ki-va)\
**Replies:** 1\
**Last updated:** [12 November 2019 19:35 UTC](https://discourse.nodered.org/t/help-with-elapsed-time/17855 "2019-11-12T19:35:34Z")

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Hi, I'm running a Node-red on RPI3 and need help with Elapsed Time: I'm trying accomplish two things: 1.Get an input from the user about the date and time then calculate an elapsed time from that point forward. I want…

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## [ESP8266 Stopped sending data to node-red](https://discourse.nodered.org/t/esp8266-stopped-sending-data-to-node-red/17864)

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**Author:** [@redlop](https://discourse.nodered.org/u/redlop)\
**Replies:** 5\
**Last updated:** [13 November 2019 07:46 UTC](https://discourse.nodered.org/t/esp8266-stopped-sending-data-to-node-red/17864 "2019-11-13T07:46:06Z")

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My ESP8266 doesn't send data through mqtt. It worked for about 10mins then stopped sending the data. I've tried connecting the device to a different router, and even uploading the code to a new one. But the problem pers…

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## [Http/tcp nodes. Input vs output. Help](https://discourse.nodered.org/t/http-tcp-nodes-input-vs-output-help/17861)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 12\
**Last updated:** [13 November 2019 07:14 UTC](https://discourse.nodered.org/t/http-tcp-nodes-input-vs-output-help/17861 "2019-11-13T07:14:35Z")

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Looking in the output set of nodes there is a http response node which Sends responses back to requests received from an HTTP Input node. Yeah, ok. I'll read that as this machine is the one which got the request via…

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## [Using a Background Image and Links Together in Node-RED UI](https://discourse.nodered.org/t/using-a-background-image-and-links-together-in-node-red-ui/17841)

<div class="topic-metadata">

**Author:** [@jstou](https://discourse.nodered.org/u/jstou)\
**Replies:** 5\
**Last updated:** [13 November 2019 07:09 UTC](https://discourse.nodered.org/t/using-a-background-image-and-links-together-in-node-red-ui/17841 "2019-11-13T07:09:35Z")

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Hi, I am wondering if Node-RED has the dynamic ability in the UI to have a background image where you can click on part of the image and it shows pre-defined group data (i.e., like one of the group "tiles"). What I am t…

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## [How to use oled node](https://discourse.nodered.org/t/how-to-use-oled-node/5423)

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**Author:** [@kenkoknz](https://discourse.nodered.org/u/kenkoknz)\
**Replies:** 3\
**Last updated:** [13 November 2019 04:11 UTC](https://discourse.nodered.org/t/how-to-use-oled-node/5423 "2019-11-13T04:11:12Z")

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Hi, Installed node-red-contrib-oled and managed to display a string "hello world" with inject node with json payload of { "size":3, "x":1,"y":1,"text":"hello world"}. (The format obviously require size and x y coordin…

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## [NodeRed on a usb stick?](https://discourse.nodered.org/t/nodered-on-a-usb-stick/17851)

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**Author:** [@kenkoknz](https://discourse.nodered.org/u/kenkoknz)\
**Replies:** 4\
**Last updated:** [13 November 2019 02:43 UTC](https://discourse.nodered.org/t/nodered-on-a-usb-stick/17851 "2019-11-13T02:43:56Z")

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Is it possible to have a 'portable' version of NR?

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## [Array into REST format for API call](https://discourse.nodered.org/t/array-into-rest-format-for-api-call/17850)

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**Author:** [@danleighton](https://discourse.nodered.org/u/danleighton)\
**Replies:** 8\
**Last updated:** [13 November 2019 00:34 UTC](https://discourse.nodered.org/t/array-into-rest-format-for-api-call/17850 "2019-11-13T00:34:46Z")

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Hi All, Help needed please. I need to turn this array in the payload: { "payload": \[ { "latitude": "52.111", "longitude": "0.222" }, { "latitude": "52.333…

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## [Formatting JSON Array to node-red](https://discourse.nodered.org/t/formatting-json-array-to-node-red/17857)

<div class="topic-metadata">

**Author:** [@redlop](https://discourse.nodered.org/u/redlop)\
**Replies:** 4\
**Last updated:** [12 November 2019 22:20 UTC](https://discourse.nodered.org/t/formatting-json-array-to-node-red/17857 "2019-11-12T22:20:15Z")

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Hi, I have an ESP8266 program that prints the networks scanned and places them in a JSON Array. I'm trying to send it to via mqtt and node-red. I've also converted it into a String in arduino but when I connect a text no…

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## [Not able to install or deinstall nodes](https://discourse.nodered.org/t/not-able-to-install-or-deinstall-nodes/17858)

<div class="topic-metadata">

**Author:** [@IngoB](https://discourse.nodered.org/u/IngoB)\
**Replies:** 2\
**Last updated:** [12 November 2019 20:51 UTC](https://discourse.nodered.org/t/not-able-to-install-or-deinstall-nodes/17858 "2019-11-12T20:51:28Z")

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Hi, I have some truble with installation of nodes or deinstallation. On every try I will get the same message and tried to repair npm package issue. Do you have any idea to fix this issue? Thanks and regards Ingo 201…

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