# Latest

**URL:** https://discourse.nodered.org/latest.md?page=805

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

**Page:** 806

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## [BACnet write property](https://discourse.nodered.org/t/bacnet-write-property/12482)

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**Author:** [@fordarn](https://discourse.nodered.org/u/fordarn)\
**Replies:** 7\
**Last updated:** [29 May 2021 04:18 UTC](https://discourse.nodered.org/t/bacnet-write-property/12482 "2021-05-29T04:18:26Z")

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Hi All New to Raspberry PI and Node Red. I have been playing all day and trying to integrate a BMS controller and a Pi together for home automation via BACnet (node-red-contrib-bacnet) I have managed to get the read p…

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## [Failure to create my first UI table](https://discourse.nodered.org/t/failure-to-create-my-first-ui-table/46087)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 26\
**Last updated:** [28 May 2021 23:02 UTC](https://discourse.nodered.org/t/failure-to-create-my-first-ui-table/46087 "2021-05-28T23:02:00Z")

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Hi folks, I'm using the node-red-node-ui-table for the first time, but - although it seems a very nice component - I cannot get it working. In the following example flow, I inject a message to fill the table with two s…

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## [Decode byte Help](https://discourse.nodered.org/t/decode-byte-help/46415)

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**Author:** [@Monzav](https://discourse.nodered.org/u/Monzav)\
**Replies:** 2\
**Last updated:** [28 May 2021 21:31 UTC](https://discourse.nodered.org/t/decode-byte-help/46415 "2021-05-28T21:31:18Z")

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this is what i'm sending through the serial port and I am receiving this Could someone tell me why I receive this?

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## [Unable to listen on port 23](https://discourse.nodered.org/t/unable-to-listen-on-port-23/46420)

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**Author:** [@that-jim](https://discourse.nodered.org/u/that-jim)\
**Replies:** 4\
**Last updated:** [28 May 2021 20:48 UTC](https://discourse.nodered.org/t/unable-to-listen-on-port-23/46420 "2021-05-28T20:48:10Z")

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I am setting up node red on a raspberry pi to act as a protocol adaptor. I would like to have node red listen for a connection on port 23. I have a piece of old equipment that wants to connect to the pie using port 23, i…

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## [How to restart Node-red on ubuntu](https://discourse.nodered.org/t/how-to-restart-node-red-on-ubuntu/43465)

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**Author:** [@Anthony](https://discourse.nodered.org/u/Anthony)\
**Replies:** 6\
**Last updated:** [28 May 2021 20:06 UTC](https://discourse.nodered.org/t/how-to-restart-node-red-on-ubuntu/43465 "2021-05-28T20:06:43Z")

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Hi All, I'm following this guide to creating my first custom node. In the guide it states that ' Any changes to the node’s file can be picked up by simply restarting Node-RED' but does not provide any instruction on how…

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## [Anyone made a flow to record an MQTT feed and replay it?](https://discourse.nodered.org/t/anyone-made-a-flow-to-record-an-mqtt-feed-and-replay-it/46413)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 2\
**Last updated:** [28 May 2021 20:03 UTC](https://discourse.nodered.org/t/anyone-made-a-flow-to-record-an-mqtt-feed-and-replay-it/46413 "2021-05-28T20:03:27Z")

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..at the speed the messages came in at? Just checking before I set to writing one :slight\_smile:

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## [MySql parsing error after a day of working](https://discourse.nodered.org/t/mysql-parsing-error-after-a-day-of-working/46360)

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**Author:** [@Apulus](https://discourse.nodered.org/u/Apulus)\
**Replies:** 7\
**Last updated:** [28 May 2021 19:35 UTC](https://discourse.nodered.org/t/mysql-parsing-error-after-a-day-of-working/46360 "2021-05-28T19:35:36Z")

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Dear All after one day of normal behaviour I got this error from Mysql Node. "Error: ER\_PARSE\_ERROR: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right…

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## [Grafana question about line for all input in DB](https://discourse.nodered.org/t/grafana-question-about-line-for-all-input-in-db/46370)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 7\
**Last updated:** [28 May 2021 18:50 UTC](https://discourse.nodered.org/t/grafana-question-about-line-for-all-input-in-db/46370 "2021-05-28T18:50:10Z")

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Hello i do send daily aproximatly 10 time information to a influxDB. With Grafana i just would like the hourly input as bar and cumulative line of each input into the database. i just can't find out how to use it - be…

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## [Still using RPI v1 512MB update script fails](https://discourse.nodered.org/t/still-using-rpi-v1-512mb-update-script-fails/46419)

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**Author:** [@redDawn](https://discourse.nodered.org/u/redDawn)\
**Replies:** 0\
**Last updated:** [28 May 2021 18:30 UTC](https://discourse.nodered.org/t/still-using-rpi-v1-512mb-update-script-fails/46419 "2021-05-28T18:30:30Z")

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I managed to walk through the update script "update-nodejs-and-nodered.sh" and get back up and running, with everything up to date. May 28 13:53:04 myPi512 Node-RED\[606\]: Welcome to Node-RED May 28 13:53:04 myPi512 Node…

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## [Help with POST request with Venstar API](https://discourse.nodered.org/t/help-with-post-request-with-venstar-api/46347)

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**Author:** [@NRdiscrs9393](https://discourse.nodered.org/u/NRdiscrs9393)\
**Replies:** 1\
**Last updated:** [28 May 2021 18:15 UTC](https://discourse.nodered.org/t/help-with-post-request-with-venstar-api/46347 "2021-05-28T18:15:00Z")

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Hello, How may I properly configure the change node to POST to my Venstar thermostat via an http request node? Here is what the Venstar API calls for: request.post({ url:'http://192.168.1.104/control', form:{ mo…

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## [Get the most of your Venstar Thermostat with this Node Red flow and MQTT](https://discourse.nodered.org/t/get-the-most-of-your-venstar-thermostat-with-this-node-red-flow-and-mqtt/46417)

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**Author:** [@NRdiscrs9393](https://discourse.nodered.org/u/NRdiscrs9393)\
**Replies:** 0\
**Last updated:** [28 May 2021 18:14 UTC](https://discourse.nodered.org/t/get-the-most-of-your-venstar-thermostat-with-this-node-red-flow-and-mqtt/46417 "2021-05-28T18:14:32Z")

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Here's the Flow T3700.txt (69.5 KB) Here's what I did. There are multiple ways to achieve this. While in OpenHAB Paper UI, create a new "Generic MQTT Thing" named HVAC. Then create a "Number" Channel with MQTT state t…

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## [Save debug Node into a file](https://discourse.nodered.org/t/save-debug-node-into-a-file/46299)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 6\
**Last updated:** [28 May 2021 17:51 UTC](https://discourse.nodered.org/t/save-debug-node-into-a-file/46299 "2021-05-28T17:51:48Z")

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Hello i have a flow and of course some debug node! no the debug information comes not often - most in the night. Is there a way to save the hole debug information into a file? have a nice day vinc

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## [Modbus TCP using Node-Red](https://discourse.nodered.org/t/modbus-tcp-using-node-red/46354)

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**Author:** [@dpatel2016](https://discourse.nodered.org/u/dpatel2016)\
**Replies:** 3\
**Last updated:** [28 May 2021 16:00 UTC](https://discourse.nodered.org/t/modbus-tcp-using-node-red/46354 "2021-05-28T16:00:02Z")

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Hi, I have a machine that talks Modbus TCP and I want to communicate to it using node-red on raspberry pi. Is it possible to do what is shown in the picture? The register address is 40001. I have modbus TCP node instal…

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## [Only send a message if I press a button](https://discourse.nodered.org/t/only-send-a-message-if-i-press-a-button/46355)

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**Author:** [@luis](https://discourse.nodered.org/u/luis)\
**Replies:** 15\
**Last updated:** [28 May 2021 15:58 UTC](https://discourse.nodered.org/t/only-send-a-message-if-i-press-a-button/46355 "2021-05-28T15:58:46Z")

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Is there any way I can store a value until I press a button? The problem Im having is that a button is just an input and I dont know how to make It so the value gets stored until I press the button.

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## [Conversation with STONE Panel via Serial Port](https://discourse.nodered.org/t/conversation-with-stone-panel-via-serial-port/46156)

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**Author:** [@DerD74](https://discourse.nodered.org/u/DerD74)\
**Replies:** 11\
**Last updated:** [28 May 2021 15:28 UTC](https://discourse.nodered.org/t/conversation-with-stone-panel-via-serial-port/46156 "2021-05-28T15:28:13Z")

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Dear all, I try to comuicate with STONE Panel via Serial Port. This is working with hex commands as you can read in the screenshot below. I tried out folloiwing with serial nodes. But it does not work and I dont kno…

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## [Pass msg only if another arrive](https://discourse.nodered.org/t/pass-msg-only-if-another-arrive/46402)

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**Author:** [@thalesmaoa](https://discourse.nodered.org/u/thalesmaoa)\
**Replies:** 8\
**Last updated:** [28 May 2021 15:07 UTC](https://discourse.nodered.org/t/pass-msg-only-if-another-arrive/46402 "2021-05-28T15:07:10Z")

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Hi there, I'm having trouble to put my flow to work. I have two messages coming from different sensors. Sometimes, sensor 1 gives a false alarm (can't fix it using hardware). So I decided to only pass the message to the…

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## [Update on power level threshold flow-triggering](https://discourse.nodered.org/t/update-on-power-level-threshold-flow-triggering/46406)

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**Author:** [@hepcat72](https://discourse.nodered.org/u/hepcat72)\
**Replies:** 0\
**Last updated:** [28 May 2021 14:34 UTC](https://discourse.nodered.org/t/update-on-power-level-threshold-flow-triggering/46406 "2021-05-28T14:34:56Z")

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In case anyone is interested, I thought I would provide an update to this thread. In summary, my goal was to find a device that could quickly communicate to my Node Red instance when power consumption on an outlet passe…

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## [Kasa HS-105 - Event in case of power outage?](https://discourse.nodered.org/t/kasa-hs-105-event-in-case-of-power-outage/46373)

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**Author:** [@rakgupta](https://discourse.nodered.org/u/rakgupta)\
**Replies:** 4\
**Last updated:** [28 May 2021 13:33 UTC](https://discourse.nodered.org/t/kasa-hs-105-event-in-case-of-power-outage/46373 "2021-05-28T13:33:35Z")

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Hello - I am using the TP-Link node ( node-red-contrib-tplink) and I can see the power events if I turn the plug on/off from either the app or by sending it the command from Node-RED (inject node). However, I am trying t…

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## [Reduced Line Spacing](https://discourse.nodered.org/t/reduced-line-spacing/46346)

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**Author:** [@Manfred53](https://discourse.nodered.org/u/Manfred53)\
**Replies:** 8\
**Last updated:** [28 May 2021 13:31 UTC](https://discourse.nodered.org/t/reduced-line-spacing/46346 "2021-05-28T13:31:36Z")

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Hello, I tried to reduce the line spacing in Text node to write date and time below a value and tried this: \<p style=“line-height: 50%“\> \<font size = 3\> {{msg.payload}} \<br\> \<font size = 1\>{{msg.date}} {{msg.time}} \</p\>…

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## [Use Hue Temp and Hue Light to control cover](https://discourse.nodered.org/t/use-hue-temp-and-hue-light-to-control-cover/46399)

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**Author:** [@TurboKanne](https://discourse.nodered.org/u/TurboKanne)\
**Replies:** 3\
**Last updated:** [28 May 2021 11:57 UTC](https://discourse.nodered.org/t/use-hue-temp-and-hue-light-to-control-cover/46399 "2021-05-28T11:57:01Z")

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Hi, a few month ago I started to use Home Assistant with Node Red. I really like it although there are a lot of things that I do not understand or know yet. For my flows so far (such as time based window cover movem…

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## [Message structure convention](https://discourse.nodered.org/t/message-structure-convention/46324)

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**Author:** [@bartoszek](https://discourse.nodered.org/u/bartoszek)\
**Replies:** 8\
**Last updated:** [28 May 2021 10:36 UTC](https://discourse.nodered.org/t/message-structure-convention/46324 "2021-05-28T10:36:31Z")

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Hi! I've got a problem with choosing a "Node-RED" way to "construct" the message passed through nodes. To describe my "problem" I have an array of relays, couple of boards, with 16 relays each, most of them are used t…

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## [Node-red-node-ui-list ... with "unselectable" entries?](https://discourse.nodered.org/t/node-red-node-ui-list-with-unselectable-entries/46393)

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**Author:** [@JoeWiseman](https://discourse.nodered.org/u/JoeWiseman)\
**Replies:** 0\
**Last updated:** [28 May 2021 09:58 UTC](https://discourse.nodered.org/t/node-red-node-ui-list-with-unselectable-entries/46393 "2021-05-28T09:58:06Z")

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Hi there, I'm using the node-red-node-ui-list for selecting / grouping my SONOS player. Though I'm not using the players all the time I shut them down by smart plugs and they are only availible if I start them first. …

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## ["Cannot GET/" No GUI](https://discourse.nodered.org/t/cannot-get-no-gui/46323)

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**Author:** [@subwayfootlong](https://discourse.nodered.org/u/subwayfootlong)\
**Replies:** 7\
**Last updated:** [28 May 2021 09:08 UTC](https://discourse.nodered.org/t/cannot-get-no-gui/46323 "2021-05-28T09:08:54Z")

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I cant access the GUI. Usually if there was an error, it would display after the / but there's nothing For some reason, im able to access it on another pc on the same network but not locally?

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## [How to use a number value from JSON message published from an MQTT broker in a switch node](https://discourse.nodered.org/t/how-to-use-a-number-value-from-json-message-published-from-an-mqtt-broker-in-a-switch-node/46391)

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**Author:** [@weatherkicksass](https://discourse.nodered.org/u/weatherkicksass)\
**Replies:** 3\
**Last updated:** [28 May 2021 09:02 UTC](https://discourse.nodered.org/t/how-to-use-a-number-value-from-json-message-published-from-an-mqtt-broker-in-a-switch-node/46391 "2021-05-28T09:02:09Z")

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Hi all, I am publishing a JSON data from an MQTT broker which I can turn into a JavaScript Object using the JSON node, then I can find the number value in the object array using the debug node and clicking on the "copy …

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## [Unable to remove return carriage from msg](https://discourse.nodered.org/t/unable-to-remove-return-carriage-from-msg/46392)

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**Author:** [@FeliceM](https://discourse.nodered.org/u/FeliceM)\
**Replies:** 2\
**Last updated:** [28 May 2021 08:18 UTC](https://discourse.nodered.org/t/unable-to-remove-return-carriage-from-msg/46392 "2021-05-28T08:18:06Z")

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I am receiving a simple msg from a Python code controlling a temperature sensor. The Python output is stable and doesn't show any carriage return/new line or spaces I have set a function trying to remove the carriage r…

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## [Conbee2 on raspberry, WIFI as Access Point possible?](https://discourse.nodered.org/t/conbee2-on-raspberry-wifi-as-access-point-possible/46389)

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**Author:** [@ie404](https://discourse.nodered.org/u/ie404)\
**Replies:** 0\
**Last updated:** [28 May 2021 07:13 UTC](https://discourse.nodered.org/t/conbee2-on-raspberry-wifi-as-access-point-possible/46389 "2021-05-28T07:13:25Z")

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Hi there, im using a rapsberry pi with conbee2 and have some zigbee devices which work great with node-red. Now, i bought a shelly Plug S, which uses wifi. To seperate my wifi from a IOT-wifi i´d like to create an own …

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## [NR and MQTT updates have broken my project](https://discourse.nodered.org/t/nr-and-mqtt-updates-have-broken-my-project/46298)

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**Author:** [@bodylinksystems](https://discourse.nodered.org/u/bodylinksystems)\
**Replies:** 20\
**Last updated:** [28 May 2021 00:17 UTC](https://discourse.nodered.org/t/nr-and-mqtt-updates-have-broken-my-project/46298 "2021-05-28T00:17:33Z")

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TL;DR: It worked last year, updating to newest versions of NR and MQTT broke it. Many UI elements were particularly affected. Older version still works but no MQTT. OLD Versions / (NEW Versions are the latest provided v…

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## [Inc.jet Printer communication problem](https://discourse.nodered.org/t/inc-jet-printer-communication-problem/46376)

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**Author:** [@tree-frog](https://discourse.nodered.org/u/tree-frog)\
**Replies:** 2\
**Last updated:** [28 May 2021 00:13 UTC](https://discourse.nodered.org/t/inc-jet-printer-communication-problem/46376 "2021-05-28T00:13:21Z")

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Dear Sirs: I have an inc.jet printer that speaks only in a complex series of non-printable characters. I need to pass the printer on the TCP port a series of bytes. my initial tests are failing. I'm looking for a mea…

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## [Try to scrape a website, that contain only one table](https://discourse.nodered.org/t/try-to-scrape-a-website-that-contain-only-one-table/46326)

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**Author:** [@Vamp](https://discourse.nodered.org/u/Vamp)\
**Replies:** 3\
**Last updated:** [27 May 2021 21:14 UTC](https://discourse.nodered.org/t/try-to-scrape-a-website-that-contain-only-one-table/46326 "2021-05-27T21:14:31Z")

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Hello there, I try to scrape a very basic site (it only a table at all) https://www.met.hu/idojaras/veszelyjelzes/hover.php?id=wbhx&kod=18 I use this node: https://flows.nodered.org/node/node-red-contrib-scrape-it it …

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## [Use a OS variable](https://discourse.nodered.org/t/use-a-os-variable/46345)

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**Author:** [@pvanklink](https://discourse.nodered.org/u/pvanklink)\
**Replies:** 5\
**Last updated:** [27 May 2021 21:14 UTC](https://discourse.nodered.org/t/use-a-os-variable/46345 "2021-05-27T21:14:27Z")

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I like to use a os variable in my flow, the hostname. So i added a line in (top) of settings.js (Nodered is installed as a docker container on a rpi 4b, with the latest image/container of NR) process.env.hostname = re…

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