# Latest

**URL:** https://discourse.nodered.org/latest.md?page=742

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

**Page:** 743

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## [RaspiCam with LED Lighting and Pan & Tilt](https://discourse.nodered.org/t/raspicam-with-led-lighting-and-pan-tilt/50476)

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**Author:** [@Gunner](https://discourse.nodered.org/u/Gunner)\
**Replies:** 0\
**Last updated:** [1 September 2021 04:41 UTC](https://discourse.nodered.org/t/raspicam-with-led-lighting-and-pan-tilt/50476 "2021-09-01T04:41:05Z")

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I finally added the latest touch to my PiCam setup... keyboard control. Specifically the arrow keys on the keyboard (thanks to some posted code from @Steve-Mcl ) that I was able to add to the adjustment of both pan and …

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## [Dashboard slider control via arrow keys on physical keyboard](https://discourse.nodered.org/t/dashboard-slider-control-via-arrow-keys-on-physical-keyboard/50178)

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**Author:** [@eltucaso](https://discourse.nodered.org/u/eltucaso)\
**Replies:** 11\
**Last updated:** [1 September 2021 03:51 UTC](https://discourse.nodered.org/t/dashboard-slider-control-via-arrow-keys-on-physical-keyboard/50178 "2021-09-01T03:51:29Z")

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I've successfully developed and deployed a Node-Red instance on a RPI3B+, and am controlling a rover via the GPIO pins. Unfortunately it is tedious to drive a rover with sliders via a browser; I'd like to 1). use the arr…

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## [How to Merge 4 Arrays Into Array of Objects?](https://discourse.nodered.org/t/how-to-merge-4-arrays-into-array-of-objects/50462)

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**Author:** [@geoseph](https://discourse.nodered.org/u/geoseph)\
**Replies:** 10\
**Last updated:** [31 August 2021 23:02 UTC](https://discourse.nodered.org/t/how-to-merge-4-arrays-into-array-of-objects/50462 "2021-08-31T23:02:39Z")

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Hey everyone! So once again my pea brain is failing me lol. I'm trying to figure out how to merge 4 Arrays into an Array of Objects (each of the Arrays has up to 20 strings inside it). Here are a sample of the Arrays…

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## [Creating flows and connections via (function-)node](https://discourse.nodered.org/t/creating-flows-and-connections-via-function-node/49378)

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**Author:** [@Zizou](https://discourse.nodered.org/u/Zizou)\
**Replies:** 1\
**Last updated:** [31 August 2021 21:06 UTC](https://discourse.nodered.org/t/creating-flows-and-connections-via-function-node/49378 "2021-08-31T21:06:26Z")

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Hello dear NodeRED community, first of all, i'm excited about the software and this forum where people help each other where they can. If my question does not belong in this category, please bring it to my attention. I…

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## [Whats the best way to work out this checksum?](https://discourse.nodered.org/t/whats-the-best-way-to-work-out-this-checksum/50414)

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**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 6\
**Last updated:** [31 August 2021 20:15 UTC](https://discourse.nodered.org/t/whats-the-best-way-to-work-out-this-checksum/50414 "2021-08-31T20:15:10Z")

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Guys, I am working through the control of my new inverters and batteries and have worked out the next stage of sending data to them in the correct format. Basically it is a hex string such as aa55c07f02390b070d040000…

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## [Passing SVG code to template\_UI - not showing in dashboard](https://discourse.nodered.org/t/passing-svg-code-to-template-ui-not-showing-in-dashboard/50411)

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**Author:** [@adiculiniute](https://discourse.nodered.org/u/adiculiniute)\
**Replies:** 11\
**Last updated:** [31 August 2021 20:02 UTC](https://discourse.nodered.org/t/passing-svg-code-to-template-ui-not-showing-in-dashboard/50411 "2021-08-31T20:02:48Z")

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Hello! I spend days to achieve this, and I did not manage to success.. I have a PHP script that renders a SVG code, (drawing a boiler). In browser everything is Ok. In node-red I am using an httprequest to output the …

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## [Retain connections to re-ordered outputs](https://discourse.nodered.org/t/retain-connections-to-re-ordered-outputs/50379)

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**Author:** [@marcus-j-davies](https://discourse.nodered.org/u/marcus-j-davies)\
**Replies:** 8\
**Last updated:** [31 August 2021 19:28 UTC](https://discourse.nodered.org/t/retain-connections-to-re-ordered-outputs/50379 "2021-08-31T19:28:55Z")

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So, I am using the editableList UI widget, that is also responsible for spawning output pins. This all works well, I can add/remove/re-order so on and so forth. I have a function for outputLabels that returns the name…

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## [SMTP server to receive notifications from devices that send mail](https://discourse.nodered.org/t/smtp-server-to-receive-notifications-from-devices-that-send-mail/50455)

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**Author:** [@quarfie](https://discourse.nodered.org/u/quarfie)\
**Replies:** 2\
**Last updated:** [31 August 2021 18:57 UTC](https://discourse.nodered.org/t/smtp-server-to-receive-notifications-from-devices-that-send-mail/50455 "2021-08-31T18:57:29Z")

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I have a device that sends email notifications to a configured smtp server. I would like like Node-RED to handle this more like a webhook, where it receives the email from the device and passes the contents to the next …

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## [Using variables to program Eztimer error: Invalid object (msg.payload) input](https://discourse.nodered.org/t/using-variables-to-program-eztimer-error-invalid-object-msg-payload-input/50452)

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**Author:** [@smithy](https://discourse.nodered.org/u/smithy)\
**Replies:** 2\
**Last updated:** [31 August 2021 16:13 UTC](https://discourse.nodered.org/t/using-variables-to-program-eztimer-error-invalid-object-msg-payload-input/50452 "2021-08-31T16:13:44Z")

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Trying to program Eztimer on and off time without success, I assume the problem is with the input to Eztimer not being the right type, I have tried converting object to JSON string with JSON node and also using mustache …

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## [Heatmap in Worldmap with timestamp conditional](https://discourse.nodered.org/t/heatmap-in-worldmap-with-timestamp-conditional/50438)

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**Author:** [@cheezum](https://discourse.nodered.org/u/cheezum)\
**Replies:** 3\
**Last updated:** [31 August 2021 15:46 UTC](https://discourse.nodered.org/t/heatmap-in-worldmap-with-timestamp-conditional/50438 "2021-08-31T15:46:27Z")

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Hi, I'm using Worldmap (2.15.5) to visualize traffic. To visualize any traffic jam, I would like to use the heatmap function on it. It's really cool. However, I can't find a way to remove drawn points after a specific t…

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## [Node-red-contrib-ldap-login not returning users attributes v0.0.15](https://discourse.nodered.org/t/node-red-contrib-ldap-login-not-returning-users-attributes-v0-0-15/50439)

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**Author:** [@notnice](https://discourse.nodered.org/u/notnice)\
**Replies:** 2\
**Last updated:** [31 August 2021 13:53 UTC](https://discourse.nodered.org/t/node-red-contrib-ldap-login-not-returning-users-attributes-v0-0-15/50439 "2021-08-31T13:53:38Z")

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I have tried both AD login and LDAP find nodes. Both return a bind success, but neither return any user/group attributes. If I include msg.ad\_attributes with JSON as specified on GitHub I still get no values for the att…

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## [Responsive layout](https://discourse.nodered.org/t/responsive-layout/50356)

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**Author:** [@Sean-McG](https://discourse.nodered.org/u/Sean-McG)\
**Replies:** 2\
**Last updated:** [31 August 2021 13:35 UTC](https://discourse.nodered.org/t/responsive-layout/50356 "2021-08-31T13:35:43Z")

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Hi all, I have a clock and logo etc on the top bar, but when viewing on mobile devices these get in the way. After some searching I found this code to hide objects based on screen width. As I want to hide 2 items, but …

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## [Node-Red start up cycle](https://discourse.nodered.org/t/node-red-start-up-cycle/50249)

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**Author:** [@Duncan](https://discourse.nodered.org/u/Duncan)\
**Replies:** 7\
**Last updated:** [31 August 2021 13:24 UTC](https://discourse.nodered.org/t/node-red-start-up-cycle/50249 "2021-08-31T13:24:29Z")

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Good morning all, I need advice with the Node-Red start up cycle. I have several relay outputs controlled by a Modbus node. These outputs are controlled by several variable comparisons and calculations coming from a fiel…

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## [Fail Install node-red](https://discourse.nodered.org/t/fail-install-node-red/50378)

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**Author:** [@marko033](https://discourse.nodered.org/u/marko033)\
**Replies:** 2\
**Last updated:** [31 August 2021 12:57 UTC](https://discourse.nodered.org/t/fail-install-node-red/50378 "2021-08-31T12:57:04Z")

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Hi, I tried to install node-red I have PC behind corporate proxy but I have set correct proxy setting. during installation i get error: node-pre-gyp ERR! install response status 403 Forbidden on https://github.com/kelek…

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## [RTD 8 channel hat with Raspberry Pi 4 (Need help to read temperature from PT100)](https://discourse.nodered.org/t/rtd-8-channel-hat-with-raspberry-pi-4-need-help-to-read-temperature-from-pt100/50272)

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**Author:** [@cjnavi](https://discourse.nodered.org/u/cjnavi)\
**Replies:** 8\
**Last updated:** [31 August 2021 12:19 UTC](https://discourse.nodered.org/t/rtd-8-channel-hat-with-raspberry-pi-4-need-help-to-read-temperature-from-pt100/50272 "2021-08-31T12:19:13Z")

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Hi All, I am new for node red and using 8 channel RTD HAT with Raspberry Pi4. could you lease help me to configure RTD sensors like PT-100 with given board? with help of Node-red or Python script. Thanks in advance.... …

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## [Node-red-contrib-flow-manager -\> flow-manager-nodes-order.json](https://discourse.nodered.org/t/node-red-contrib-flow-manager-flow-manager-nodes-order-json/50434)

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**Author:** [@eastling](https://discourse.nodered.org/u/eastling)\
**Replies:** 0\
**Last updated:** [31 August 2021 11:25 UTC](https://discourse.nodered.org/t/node-red-contrib-flow-manager-flow-manager-nodes-order-json/50434 "2021-08-31T11:25:20Z")

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Hi, We are using node-red-contrib-flow-manager to split up our flow to make version handling of the flows more manageable. However the file "flow-manager-nodes-order.json" generated by the library just contain an array…

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## [Modbus Write Issues](https://discourse.nodered.org/t/modbus-write-issues/50429)

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**Author:** [@gjones84](https://discourse.nodered.org/u/gjones84)\
**Replies:** 0\
**Last updated:** [31 August 2021 09:51 UTC](https://discourse.nodered.org/t/modbus-write-issues/50429 "2021-08-31T09:51:39Z")

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Hi All, I am currently using the node-red-contrib-modbus node to write a value to my Victron Multiplus 2 Inverter/charger. I am running mode 3 which is my own contol loop using node red. A new value must be written ever…

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## [Filtering RSS Feeds](https://discourse.nodered.org/t/filtering-rss-feeds/50426)

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**Author:** [@darud](https://discourse.nodered.org/u/darud)\
**Replies:** 2\
**Last updated:** [31 August 2021 08:56 UTC](https://discourse.nodered.org/t/filtering-rss-feeds/50426 "2021-08-31T08:56:23Z")

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Hi there, I try to read an RSS Feed with the node-red-node-Feedparser. This node always brings the whole Feed with 50 something Entrys. How can I just Filter the most recent entry (1 oder 10 Items)? Sorry, for this ver…

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## [Rbe already registered](https://discourse.nodered.org/t/rbe-already-registered/50406)

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**Author:** [@flecoufle](https://discourse.nodered.org/u/flecoufle)\
**Replies:** 9\
**Last updated:** [31 August 2021 08:50 UTC](https://discourse.nodered.org/t/rbe-already-registered/50406 "2021-08-31T08:50:48Z")

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Hello, after upgrading to 2.0.x I have this warning in console \[warn\] \[node-red-node-rbe/rbe\] 'rbe' already registered by module node-red how can I do to "clean" this warning ? thanks flecoufle

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## [Get values from server MS4D (Modbus TCP)](https://discourse.nodered.org/t/get-values-from-server-ms4d-modbus-tcp/50385)

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**Author:** [@MaksimKr](https://discourse.nodered.org/u/MaksimKr)\
**Replies:** 5\
**Last updated:** [31 August 2021 08:41 UTC](https://discourse.nodered.org/t/get-values-from-server-ms4d-modbus-tcp/50385 "2021-08-31T08:41:32Z")

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Hello, I'm new in NR. I have a quastion: a have a virtual machine with NR on one PC and server on other PC. I try to get values, using modbus TCP from the server MasterScada4D. All machines use one lan and have ping. Ser…

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## [How to parse this Hex string?](https://discourse.nodered.org/t/how-to-parse-this-hex-string/50422)

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**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 3\
**Last updated:** [31 August 2021 07:30 UTC](https://discourse.nodered.org/t/how-to-parse-this-hex-string/50422 "2021-08-31T07:30:55Z")

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Guys, I have the following Hex string aa557fc001824d3038303843475735303030532d4250ffffffffffffffffffffffffffffffff39353030304250533230425730303232333630303431302d30343030312d3038473431302d30 Parts of this decode as AS…

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## [Where to find the full list of possible FA labels?](https://discourse.nodered.org/t/where-to-find-the-full-list-of-possible-fa-labels/50427)

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**Author:** [@kakyoism](https://discourse.nodered.org/u/kakyoism)\
**Replies:** 1\
**Last updated:** [31 August 2021 07:19 UTC](https://discourse.nodered.org/t/where-to-find-the-full-list-of-possible-fa-labels/50427 "2021-08-31T07:19:16Z")

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I'm trying to build config UI for my custom nodes, but I can't seem to find the document section regarding all the possible "fa-xxx" tags for the label class. I just keep seeing magic tags in 3rd-party nodes, such as the…

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## [Set max length for node description](https://discourse.nodered.org/t/set-max-length-for-node-description/50323)

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**Author:** [@chiche](https://discourse.nodered.org/u/chiche)\
**Replies:** 11\
**Last updated:** [31 August 2021 07:11 UTC](https://discourse.nodered.org/t/set-max-length-for-node-description/50323 "2021-08-31T07:11:22Z")

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Can I set max length for description of node?

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## [Fire Trigger button from keyboard keys](https://discourse.nodered.org/t/fire-trigger-button-from-keyboard-keys/50295)

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**Author:** [@raatech91](https://discourse.nodered.org/u/raatech91)\
**Replies:** 26\
**Last updated:** [31 August 2021 06:30 UTC](https://discourse.nodered.org/t/fire-trigger-button-from-keyboard-keys/50295 "2021-08-31T06:30:07Z")

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brother help me uneed to use trigger button in node red can you help me to do it i found you got solution it .also need help can we connect keyboard keys to fire trigger button .

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## [Confusion about global variables](https://discourse.nodered.org/t/confusion-about-global-variables/50420)

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**Author:** [@jackson](https://discourse.nodered.org/u/jackson)\
**Replies:** 1\
**Last updated:** [31 August 2021 05:00 UTC](https://discourse.nodered.org/t/confusion-about-global-variables/50420 "2021-08-31T05:00:16Z")

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I tried to set both flow and global variables and I don't think I properly understand how they function. For example, I have a flow that sets a global variable global.GlobalTherm.Temp. When I inject the global variable i…

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## [How to find the length of a buffer?](https://discourse.nodered.org/t/how-to-find-the-length-of-a-buffer/50417)

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**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 1\
**Last updated:** [31 August 2021 03:52 UTC](https://discourse.nodered.org/t/how-to-find-the-length-of-a-buffer/50417 "2021-08-31T03:52:54Z")

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Guys, My inverters send in responses to queries on UDP port 8899 - there is no differentiation or ability to say for different inverters to send to different ports etc. I have 3 inverters talking and they all send resp…

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## [UI Template content not showing up in head](https://discourse.nodered.org/t/ui-template-content-not-showing-up-in-head/50407)

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**Author:** [@acoulson-epicor](https://discourse.nodered.org/u/acoulson-epicor)\
**Replies:** 4\
**Last updated:** [30 August 2021 23:13 UTC](https://discourse.nodered.org/t/ui-template-content-not-showing-up-in-head/50407 "2021-08-30T23:13:18Z")

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I am attempting to inject some css to override the default group layout. I have the type set to "Added to site section", but the style clause is not present in my dashboard UI Node Red version 1.0.6 and dashboard 2.24.…

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## [Node-red-contrib-ui-svg click and dblclick in same element](https://discourse.nodered.org/t/node-red-contrib-ui-svg-click-and-dblclick-in-same-element/50203)

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**Author:** [@samuelbras](https://discourse.nodered.org/u/samuelbras)\
**Replies:** 25\
**Last updated:** [30 August 2021 21:04 UTC](https://discourse.nodered.org/t/node-red-contrib-ui-svg-click-and-dblclick-in-same-element/50203 "2021-08-30T21:04:13Z")

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Good Morning. I'm making my dashboard and I need to have both click and doubleclick events on the same element. With the click it changes some elements. With the active doubleclick, it is possible to zoom in on a laye…

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## [Equipment run schedule graphic](https://discourse.nodered.org/t/equipment-run-schedule-graphic/50393)

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**Author:** [@bbartling](https://discourse.nodered.org/u/bbartling)\
**Replies:** 14\
**Last updated:** [30 August 2021 19:37 UTC](https://discourse.nodered.org/t/equipment-run-schedule-graphic/50393 "2021-08-30T19:37:12Z")

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Hello Does node red have a graphic UI like a building automation system (BAS) equipment scheduling graphic? These are all very typical to the BAS industry where every manufacture has something very similar, a weekly cal…

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## [Send value in a http-request](https://discourse.nodered.org/t/send-value-in-a-http-request/17169)

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**Author:** [@easyE4](https://discourse.nodered.org/u/easyE4)\
**Replies:** 13\
**Last updated:** [30 August 2021 19:35 UTC](https://discourse.nodered.org/t/send-value-in-a-http-request/17169 "2021-08-30T19:35:22Z")

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Hi erverybody, in the dokumentation for the WebAPI of my controller I find this example: /api/set/op?op=MW&index=1&val=10 What I want is to make the "val" variable, comming form a slider node. Can someone help me wit…

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