# Latest

**URL:** https://discourse.nodered.org/latest.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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## [Push csv row values in dropdown](https://discourse.nodered.org/t/push-csv-row-values-in-dropdown/47291)

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**Author:** [@sahsha](https://discourse.nodered.org/u/sahsha)\
**Replies:** 8\
**Last updated:** [25 June 2021 05:46 UTC](https://discourse.nodered.org/t/push-csv-row-values-in-dropdown/47291 "2021-06-25T05:46:28Z")

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I'm trying to push csv row values into a dropdown. need help on this. \[{"id":"c8c78f4d.679e8","type":"subflow","name":"csvColumnParser","info":"","category":"","in":\[{"x":70,"y":80,"wires":\[{"id":"a8857356.d49e68"}\]}\],"…

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## [Environment Variables for MQTT credentials](https://discourse.nodered.org/t/environment-variables-for-mqtt-credentials/47614)

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**Author:** [@ChrisBrockett-rb](https://discourse.nodered.org/u/ChrisBrockett-rb)\
**Replies:** 1\
**Last updated:** [25 June 2021 05:26 UTC](https://discourse.nodered.org/t/environment-variables-for-mqtt-credentials/47614 "2021-06-25T05:26:22Z")

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Hi all, I'm trying to use environment variables to set up credentials for the MQTT nodes, however the password field does not seem to be able to read in an environment variable as its input. The environment variable is …

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## [Fuction node for sending telegram make problem with \> \<](https://discourse.nodered.org/t/fuction-node-for-sending-telegram-make-problem-with/47603)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 4\
**Last updated:** [25 June 2021 04:30 UTC](https://discourse.nodered.org/t/fuction-node-for-sending-telegram-make-problem-with/47603 "2021-06-25T04:30:48Z")

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function Node for telegram it works fine except i use a \< \> in the let variable . if i remove it works adding it make error let GS1 = "GS1: \< 75"; let GS5 = "GS5: \> 190"; any idea how to make this a pass? have a …

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## [Subflows - question about names](https://discourse.nodered.org/t/subflows-question-about-names/47609)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 3\
**Last updated:** [24 June 2021 23:05 UTC](https://discourse.nodered.org/t/subflows-question-about-names/47609 "2021-06-24T23:05:11Z")

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Ok, I write a subflow. For the sake of being nice I add a catch node to catch any errors and send that to an output so I can use it in the real world. But I seem to be missing the trick where I can name the subflow. (…

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## [Refuse IP Connections](https://discourse.nodered.org/t/refuse-ip-connections/47570)

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**Author:** [@alexander77](https://discourse.nodered.org/u/alexander77)\
**Replies:** 3\
**Last updated:** [24 June 2021 20:28 UTC](https://discourse.nodered.org/t/refuse-ip-connections/47570 "2021-06-24T20:28:17Z")

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Due to workload circumstances i want to allow a maximum of 10 connections to a tcp server at an specified port. How can i refuse an 11th connection without affecting the existing connections? In addition, is it possible…

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## [Payload global. or flow](https://discourse.nodered.org/t/payload-global-or-flow/47602)

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**Author:** [@dsplitz](https://discourse.nodered.org/u/dsplitz)\
**Replies:** 7\
**Last updated:** [24 June 2021 20:26 UTC](https://discourse.nodered.org/t/payload-global-or-flow/47602 "2021-06-24T20:26:30Z")

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In many nodes you can select the payload to be global. or flow. ( as well as number, string, buffer....) Can anyone please point to documentation or examples on how these are used. I've had no lock searching on my own. …

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## [Influxdb node setting more values](https://discourse.nodered.org/t/influxdb-node-setting-more-values/47586)

<div class="topic-metadata">

**Author:** [@mynoderocks](https://discourse.nodered.org/u/mynoderocks)\
**Replies:** 10\
**Last updated:** [24 June 2021 19:51 UTC](https://discourse.nodered.org/t/influxdb-node-setting-more-values/47586 "2021-06-24T19:51:26Z")

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Hi all, I am currently using the influxdb out node to write values coming from my MQTT queue. Works wonders. I have two questions though: Right now its writing the value as: { "time": "2021-06-24T14:37:49.495751…

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## [Modbus tcp not installed](https://discourse.nodered.org/t/modbus-tcp-not-installed/47560)

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**Author:** [@addi](https://discourse.nodered.org/u/addi)\
**Replies:** 3\
**Last updated:** [24 June 2021 19:43 UTC](https://discourse.nodered.org/t/modbus-tcp-not-installed/47560 "2021-06-24T19:43:17Z")

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Hi All! Im newbe in node-red, I installed it on PI 4 B(2GB), and when I do install,- npm install node-red-contrib-modbus-tcp-ip I have got the folling install flow npm WARN saveError ENOENT: no such file or directory,…

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## [Parse json to get particular value](https://discourse.nodered.org/t/parse-json-to-get-particular-value/47594)

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**Author:** [@iker](https://discourse.nodered.org/u/iker)\
**Replies:** 5\
**Last updated:** [24 June 2021 19:29 UTC](https://discourse.nodered.org/t/parse-json-to-get-particular-value/47594 "2021-06-24T19:29:12Z")

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Hi there! I'm struggling to get some info from an mqtt message parsed as json, as I'm unable to retrieve one of the particular values I need to further build a dashboard. I've made different approaches with no success. …

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## [Node-red-contrib-mssql-plus: "invalid column type..."](https://discourse.nodered.org/t/node-red-contrib-mssql-plus-invalid-column-type/47597)

<div class="topic-metadata">

**Author:** [@IoTPlay](https://discourse.nodered.org/u/IoTPlay)\
**Replies:** 3\
**Last updated:** [24 June 2021 19:22 UTC](https://discourse.nodered.org/t/node-red-contrib-mssql-plus-invalid-column-type/47597 "2021-06-24T19:22:09Z")

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Hi @Steve-Mcl, I must be doing something stupid, but getting message: "Invalid column type from bcp client for colid 2. I got another bult upload working - so do not understand the issue on colid 2 - Customer nvarchar(20…

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## [Creazione di una pagina con un iframe che contiene una mappa](https://discourse.nodered.org/t/creazione-di-una-pagina-con-un-iframe-che-contiene-una-mappa/47590)

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**Author:** [@Cosimo](https://discourse.nodered.org/u/Cosimo)\
**Replies:** 1\
**Last updated:** [24 June 2021 17:53 UTC](https://discourse.nodered.org/t/creazione-di-una-pagina-con-un-iframe-che-contiene-una-mappa/47590 "2021-06-24T17:53:17Z")

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Utilizzando il seguente codice, non capisco come visualizzare la mappa in un piccolo frame, che non occupi l'intera pagina. Il codice Node-red è il seguente: \[{"id":"2635bfdb.6e08a","type":"tab","label":"Flow 3","disab…

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## [Pi - npm 7.18.1 upgrade OK?](https://discourse.nodered.org/t/pi-npm-7-18-1-upgrade-ok/47587)

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**Author:** [@plfinch](https://discourse.nodered.org/u/plfinch)\
**Replies:** 2\
**Last updated:** [24 June 2021 18:23 UTC](https://discourse.nodered.org/t/pi-npm-7-18-1-upgrade-ok/47587 "2021-06-24T18:23:15Z")

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The npm update is suggesting I upgrade from 6.14.13 to 7.18.1. I seem to recall trying to upgrade to a version 7 release a ways back and encountered issues. Is node-red on Pi v1.3.5 compatible with and should I upgrade t…

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## [MatLab/Simulink Node-Red](https://discourse.nodered.org/t/matlab-simulink-node-red/46150)

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**Author:** [@Martin10](https://discourse.nodered.org/u/Martin10)\
**Replies:** 13\
**Last updated:** [24 June 2021 17:35 UTC](https://discourse.nodered.org/t/matlab-simulink-node-red/46150 "2021-06-24T17:35:50Z")

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Hi, i came across on info (and clip), that NR and Matlab/simulink can exchange data via MQTT, UDP... Is it any example? I found this, but it is not English, so i don't understand much (Sending data from simulink to nod…

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## [How to send HEX buffer via NodeRed](https://discourse.nodered.org/t/how-to-send-hex-buffer-via-nodered/47439)

<div class="topic-metadata">

**Author:** [@NatanST](https://discourse.nodered.org/u/NatanST)\
**Replies:** 4\
**Last updated:** [24 June 2021 17:22 UTC](https://discourse.nodered.org/t/how-to-send-hex-buffer-via-nodered/47439 "2021-06-24T17:22:33Z")

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Hi! I'm a newbie using Node-RED and I'm having some issues when I try to send messages in HEX. This is the conversion table that I need: I have a setup with 4 stepper motors and I'm connecting through bluetooth. My i…

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## [Dashboard menu won't disappear](https://discourse.nodered.org/t/dashboard-menu-wont-disappear/47532)

<div class="topic-metadata">

**Author:** [@scargill](https://discourse.nodered.org/u/scargill)\
**Replies:** 22\
**Last updated:** [24 June 2021 17:20 UTC](https://discourse.nodered.org/t/dashboard-menu-wont-disappear/47532 "2021-06-24T17:20:17Z")

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Forgive me if this is no new - but I'm in a bind. I use Dashboard constantly for my home control here in Spain and in back the UK (via vpn) and I check every day. Works a treat. I have near-identical setups in both locat…

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## [Recording a sequence of sensor data for a defined time on trigger](https://discourse.nodered.org/t/recording-a-sequence-of-sensor-data-for-a-defined-time-on-trigger/47567)

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**Author:** [@Bastian](https://discourse.nodered.org/u/Bastian)\
**Replies:** 11\
**Last updated:** [24 June 2021 15:39 UTC](https://discourse.nodered.org/t/recording-a-sequence-of-sensor-data-for-a-defined-time-on-trigger/47567 "2021-06-24T15:39:40Z")

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Hi there, I'm new to node-RED and not familiar to java script at all. I started an automation project at work were I want to collect sensor data from different sources and send them to a db via MQTT. Fotos, forms (via…

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## [Msg.Payload Change](https://discourse.nodered.org/t/msg-payload-change/47581)

<div class="topic-metadata">

**Author:** [@mynoderocks](https://discourse.nodered.org/u/mynoderocks)\
**Replies:** 4\
**Last updated:** [24 June 2021 14:08 UTC](https://discourse.nodered.org/t/msg-payload-change/47581 "2021-06-24T14:08:51Z")

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Hi all, I am sure I am doing something really simple here. I have a ping node which pings an IP address. On successful ping I get the msg.payload with the ms of the ping example: {"payload":0.26,"topic":"192.168.x.x","…

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## [Display a chart in PDF](https://discourse.nodered.org/t/display-a-chart-in-pdf/20040)

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**Author:** [@wojtekdera](https://discourse.nodered.org/u/wojtekdera)\
**Replies:** 16\
**Last updated:** [24 June 2021 13:35 UTC](https://discourse.nodered.org/t/display-a-chart-in-pdf/20040 "2021-06-24T13:35:50Z")

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Hello! I have a problem with adding a chart to PDF. I want to put a chart in my Raport in PDF for a client but I haven't had any achievements in this field for several days. This is the last thing I need to do. I'm usi…

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## [RED.events inside function node?](https://discourse.nodered.org/t/red-events-inside-function-node/47519)

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**Author:** [@H3llsing](https://discourse.nodered.org/u/H3llsing)\
**Replies:** 5\
**Last updated:** [24 June 2021 12:58 UTC](https://discourse.nodered.org/t/red-events-inside-function-node/47519 "2021-06-24T12:58:13Z")

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Hey there, i was wondering if its possible to use RED.events.emit('myEvent',callback) inside a function node? EDIT does not look like it's available EDIT2 i just created a custom node which emits a nodeRED event …

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## [HowTo refresh installed nodes](https://discourse.nodered.org/t/howto-refresh-installed-nodes/47577)

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**Author:** [@Moosbueffel](https://discourse.nodered.org/u/Moosbueffel)\
**Replies:** 1\
**Last updated:** [24 June 2021 12:25 UTC](https://discourse.nodered.org/t/howto-refresh-installed-nodes/47577 "2021-06-24T12:25:17Z")

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I reinstalled my pi and NR. So I have to download all additional mudules I used via the palette menu in NR. I have had the console open, so I saw some warnings about depricated modules. I'm not so firm with this context…

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## [Conflicts between MongoDB and Bluemix Nodes](https://discourse.nodered.org/t/conflicts-between-mongodb-and-bluemix-nodes/47544)

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**Author:** [@stav](https://discourse.nodered.org/u/stav)\
**Replies:** 4\
**Last updated:** [24 June 2021 11:41 UTC](https://discourse.nodered.org/t/conflicts-between-mongodb-and-bluemix-nodes/47544 "2021-06-24T11:41:52Z")

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Hi to all. I am trying to use MongoDB in my application, and I need to use the node-red-node-mongodb. However, I get a conflict with node-red-bluemix-nodes which I can't deactivate or uninstall. I have deleted and disa…

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## [node-Red deactivate flows](https://discourse.nodered.org/t/node-red-deactivate-flows/47550)

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**Author:** [@automati](https://discourse.nodered.org/u/automati)\
**Replies:** 1\
**Last updated:** [24 June 2021 10:26 UTC](https://discourse.nodered.org/t/node-red-deactivate-flows/47550 "2021-06-24T10:26:58Z")

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hello everyone, is there a way to deactivate individual flows with a command? so that I can automatically deactivate and reactivate it ..?

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## [How to install python and other pre-requisites for node-red-contrib-machine-learning-v2 on a docker container](https://discourse.nodered.org/t/how-to-install-python-and-other-pre-requisites-for-node-red-contrib-machine-learning-v2-on-a-docker-container/47571)

<div class="topic-metadata">

**Author:** [@lei1](https://discourse.nodered.org/u/lei1)\
**Replies:** 8\
**Last updated:** [24 June 2021 09:51 UTC](https://discourse.nodered.org/t/how-to-install-python-and-other-pre-requisites-for-node-red-contrib-machine-learning-v2-on-a-docker-container/47571 "2021-06-24T09:51:14Z")

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I need to install these dependencies in advance, I am using docker to install nodered, how to install these dependencies, is there an easy way. thanks！

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## [Blue Square below Trigger Node](https://discourse.nodered.org/t/blue-square-below-trigger-node/47573)

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**Author:** [@lizhong](https://discourse.nodered.org/u/lizhong)\
**Replies:** 1\
**Last updated:** [24 June 2021 09:18 UTC](https://discourse.nodered.org/t/blue-square-below-trigger-node/47573 "2021-06-24T09:18:42Z")

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Hi all, am trying to debug a problem with my flow. Quick description of it: I am reading OPCUA values from a PLC server and am trying to write it into my influxdb. I have set a condition with my trigger node such that i…

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## [Taking control of contrib nodes when not being maintained](https://discourse.nodered.org/t/taking-control-of-contrib-nodes-when-not-being-maintained/20344)

<div class="topic-metadata">

**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 34\
**Last updated:** [19 January 2020 09:01 UTC](https://discourse.nodered.org/t/taking-control-of-contrib-nodes-when-not-being-maintained/20344 "2020-01-19T09:01:15Z")

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Just starting a discussion There are a number of useful contrib nodes that end up not being maintained How about copying them into the official Node-RED sphere? But obviously too much work for core devs so I thought, …

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## [Compare 2 variable](https://discourse.nodered.org/t/compare-2-variable/47568)

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**Author:** [@Hydci](https://discourse.nodered.org/u/Hydci)\
**Replies:** 4\
**Last updated:** [24 June 2021 07:43 UTC](https://discourse.nodered.org/t/compare-2-variable/47568 "2021-06-24T07:43:18Z")

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Good morning all, I am brand new with node red, I managed to do several projects but I have a problem with this one I would like to compare 2 variables in IF if I put 2 == it does not work if I put 1 = it works but i ge…

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## [Help with hhtp request of this string please](https://discourse.nodered.org/t/help-with-hhtp-request-of-this-string-please/47557)

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**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 11\
**Last updated:** [24 June 2021 06:42 UTC](https://discourse.nodered.org/t/help-with-hhtp-request-of-this-string-please/47557 "2021-06-24T06:42:01Z")

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Guys, My electricity provider is updating their system and now has an updated API for requests. Can someone tell me how to use the HTTP node to generate this request please ? curl -X 'GET' \\ 'https://api.amber.com.a…

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## [NodeRed 1.0.3 docker now slow to start](https://discourse.nodered.org/t/nodered-1-0-3-docker-now-slow-to-start/19209)

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**Author:** [@marcusone](https://discourse.nodered.org/u/marcusone)\
**Replies:** 5\
**Last updated:** [24 June 2021 01:52 UTC](https://discourse.nodered.org/t/nodered-1-0-3-docker-now-slow-to-start/19209 "2021-06-24T01:52:53Z")

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Updated my docker to v1.0.3 and it now starts slowly, causing docker to set "unhealthy" Seems to work ok still. Hue groups weren't responding and I restarted, when I noted the "unhealthy" state. Nothing in the logs se…

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## [When someone presses the doorbell, play sound or tts in speakers](https://discourse.nodered.org/t/when-someone-presses-the-doorbell-play-sound-or-tts-in-speakers/47556)

<div class="topic-metadata">

**Author:** [@seiken](https://discourse.nodered.org/u/seiken)\
**Replies:** 0\
**Last updated:** [24 June 2021 00:12 UTC](https://discourse.nodered.org/t/when-someone-presses-the-doorbell-play-sound-or-tts-in-speakers/47556 "2021-06-24T00:12:51Z")

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Hi I am very new to nodred and hope someone can help me with the following. I run nodred on Homeassistant, on homeassistant I have integrated a Dahua vto doorbell with camera, I have also integrated my heos / denon spea…

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## [Can myQ garage doors be partially (not fully) opened?](https://discourse.nodered.org/t/can-myq-garage-doors-be-partially-not-fully-opened/47555)

<div class="topic-metadata">

**Author:** [@reverendalc](https://discourse.nodered.org/u/reverendalc)\
**Replies:** 0\
**Last updated:** [24 June 2021 00:12 UTC](https://discourse.nodered.org/t/can-myq-garage-doors-be-partially-not-fully-opened/47555 "2021-06-24T00:12:15Z")

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I would like to create an automation which opens my garage doors 12" when a certain temperature sensor reads a certain temperature. I am able to press the physical button and press it again after 4 seconds to halt openi…

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