# Latest

**URL:** https://discourse.nodered.org/latest.md?page=897

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

**Page:** 898

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## [Raspberry Pi - start service at boot - clarification](https://discourse.nodered.org/t/raspberry-pi-start-service-at-boot-clarification/40109)

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**Author:** [@Pi-DD](https://discourse.nodered.org/u/Pi-DD)\
**Replies:** 9\
**Last updated:** [31 January 2021 16:36 UTC](https://discourse.nodered.org/t/raspberry-pi-start-service-at-boot-clarification/40109 "2021-01-31T16:36:48Z")

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The installation notes for Raspberry pi explain the need to start node-red with the specific Pi command and pass the parameter that tells Node.js to free up space earlier than it would normally do. node-red-pi --max-old…

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## [TypeError: key.startsWith is not a function](https://discourse.nodered.org/t/typeerror-key-startswith-is-not-a-function/40086)

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**Author:** [@NURULSYIFA98](https://discourse.nodered.org/u/NURULSYIFA98)\
**Replies:** 9\
**Last updated:** [31 January 2021 15:08 UTC](https://discourse.nodered.org/t/typeerror-key-startswith-is-not-a-function/40086 "2021-01-31T15:08:03Z")

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Getting this error for function, "TypeError: key.startsWith is not a function" and I don't know what happens. Can anyone help me to solve this problem. Here is my code in the function. msg.chatId= msg.payload.chatId; …

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## [Use a variable in define msg"X" = -\> (instead of msg1, msg2, msg3, msgX in loop)](https://discourse.nodered.org/t/use-a-variable-in-define-msg-x-instead-of-msg1-msg2-msg3-msgx-in-loop/40108)

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**Author:** [@Toffy77cc](https://discourse.nodered.org/u/Toffy77cc)\
**Replies:** 4\
**Last updated:** [31 January 2021 14:55 UTC](https://discourse.nodered.org/t/use-a-variable-in-define-msg-x-instead-of-msg1-msg2-msg3-msgx-in-loop/40108 "2021-01-31T14:55:48Z")

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Hi There :slight\_smile: I'm quite new and have a problem with using a variable in defining the msgX = Number... for Output in a function node. I want to replace msg1, msg2, msg3.... with msgt, msg't', {msg;t} or so to …

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## ["Waiting for Missing Types to be Registered" / "Flows stopped due to missing node types"](https://discourse.nodered.org/t/waiting-for-missing-types-to-be-registered-flows-stopped-due-to-missing-node-types/40091)

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**Author:** [@omarecd](https://discourse.nodered.org/u/omarecd)\
**Replies:** 6\
**Last updated:** [31 January 2021 14:55 UTC](https://discourse.nodered.org/t/waiting-for-missing-types-to-be-registered-flows-stopped-due-to-missing-node-types/40091 "2021-01-31T14:55:09Z")

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Dear all. I just started with Node-RED yesterday and it's just... amazing ! I love it. Today I have an issue, after a lot of research I haven't found the issue so here I am I installed Node-RED on a Raspberry-Pi 3B, so…

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## [\[Announce\] node-red-contrib-redplc (v1.0.6)](https://discourse.nodered.org/t/announce-node-red-contrib-redplc-v1-0-6/40111)

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**Author:** [@iiot2k](https://discourse.nodered.org/u/iiot2k)\
**Replies:** 0\
**Last updated:** [31 January 2021 14:14 UTC](https://discourse.nodered.org/t/announce-node-red-contrib-redplc-v1-0-6/40111 "2021-01-31T14:14:31Z")

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After long work, the redPlc nodes are finished. :sweat: With this nodes you can realize automation tasks in Node-Red. The control logic is realized as Ladder-Logic (LD) according standard IEC 61131-3. Many hardwar…

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## [1.5" RGB OLED Display & Raspberry Pi](https://discourse.nodered.org/t/1-5-rgb-oled-display-raspberry-pi/40081)

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**Author:** [@patofoto](https://discourse.nodered.org/u/patofoto)\
**Replies:** 6\
**Last updated:** [31 January 2021 13:06 UTC](https://discourse.nodered.org/t/1-5-rgb-oled-display-raspberry-pi/40081 "2021-01-31T13:06:53Z")

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I just bought a 1.5inch RGB OLED Display. It uses a SSD1351 controller. 1.5" RGB OLED I wired it like this to my Raspberry Pi 4: I can run Python code and can confirm that is wired properly and functioning as it sh…

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## [Can I use node-red-node-test-helper for testing ui components?](https://discourse.nodered.org/t/can-i-use-node-red-node-test-helper-for-testing-ui-components/40101)

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**Author:** [@SergiuToporjinschi](https://discourse.nodered.org/u/SergiuToporjinschi)\
**Replies:** 0\
**Last updated:** [31 January 2021 12:14 UTC](https://discourse.nodered.org/t/can-i-use-node-red-node-test-helper-for-testing-ui-components/40101 "2021-01-31T12:14:59Z")

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Hi, I've used node-red-node-test-helper for testing my nodes. And now I have a dashboard custom node that I want to test using node-red-node-test-helper and unfortunately throws exception when reaches RED.require("node-…

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## [Function with multiple output combined with node-red-contrib-boolean-logic](https://discourse.nodered.org/t/function-with-multiple-output-combined-with-node-red-contrib-boolean-logic/40059)

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**Author:** [@lindi](https://discourse.nodered.org/u/lindi)\
**Replies:** 2\
**Last updated:** [31 January 2021 11:22 UTC](https://discourse.nodered.org/t/function-with-multiple-output-combined-with-node-red-contrib-boolean-logic/40059 "2021-01-31T11:22:17Z")

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Hi, I try to use a function with multiple outputs and combine this logic with the “node-red-contrib-boolean-logic”. As long as I use only one output this combination works fine. As soon as I try to use multiple output th…

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## [How to delete a flow?](https://discourse.nodered.org/t/how-to-delete-a-flow/40082)

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**Author:** [@prf](https://discourse.nodered.org/u/prf)\
**Replies:** 4\
**Last updated:** [31 January 2021 04:25 UTC](https://discourse.nodered.org/t/how-to-delete-a-flow/40082 "2021-01-31T04:25:22Z")

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The last beginner question for today. From the documentation it seems that I need to enter "delete the id number of the flow", however, it's not obvious where I enter the command. Not in the terminal window it seems. I…

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## [Change node change payload from array to number](https://discourse.nodered.org/t/change-node-change-payload-from-array-to-number/40075)

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**Author:** [@vaughan.mcd](https://discourse.nodered.org/u/vaughan.mcd)\
**Replies:** 3\
**Last updated:** [31 January 2021 01:54 UTC](https://discourse.nodered.org/t/change-node-change-payload-from-array-to-number/40075 "2021-01-31T01:54:32Z")

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How to change message from 1/31/2021, 11:01:26 AMnode: 1afb97a5.247c08polling : msg.payload : array\[8\] \[ false, false, false, false, false, false, false, false \] To 0 and 1/31/2021, 11:01:26 AMnode: 1afb97a5.247c08p…

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## [RBE node is driving me crazy](https://discourse.nodered.org/t/rbe-node-is-driving-me-crazy/40073)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 23\
**Last updated:** [31 January 2021 00:01 UTC](https://discourse.nodered.org/t/rbe-node-is-driving-me-crazy/40073 "2021-01-31T00:01:22Z")

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I have been in this scenario before many times and it keeps biting me. This is a cut down of the code: \[{"id":"49a576ab.8b2ca","type":"function","z":"28c631fa.7e866e","name":"","func":"msg1 = {};\\n\\nvar state = context…

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## [This is another error I am seeing on a different machine](https://discourse.nodered.org/t/this-is-another-error-i-am-seeing-on-a-different-machine/39988)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 20\
**Last updated:** [30 January 2021 21:56 UTC](https://discourse.nodered.org/t/this-is-another-error-i-am-seeing-on-a-different-machine/39988 "2021-01-30T21:56:43Z")

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This is an interesting error I am seeing. Where 89c38d55.164f48 What Key in object structure must evaluate to a string; got: undefined Ok, the node mentioned: This is the node's code: \[{"id":"89c38d55.164f48","type…

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## [Worldmap ui - Remember Icons](https://discourse.nodered.org/t/worldmap-ui-remember-icons/40070)

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**Author:** [@ScheepersJohan](https://discourse.nodered.org/u/ScheepersJohan)\
**Replies:** 2\
**Last updated:** [30 January 2021 21:43 UTC](https://discourse.nodered.org/t/worldmap-ui-remember-icons/40070 "2021-01-30T21:43:33Z")

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Hi, I have a word Map with several icons plotted on it, when I navigated to another tab and back the icons disappear. Are their a way to "remember" them? Thanks

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## [If a value is false for x time](https://discourse.nodered.org/t/if-a-value-is-false-for-x-time/40020)

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**Author:** [@calberts](https://discourse.nodered.org/u/calberts)\
**Replies:** 6\
**Last updated:** [30 January 2021 21:16 UTC](https://discourse.nodered.org/t/if-a-value-is-false-for-x-time/40020 "2021-01-30T21:16:32Z")

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Gents i need some help i tried thorthel (count and Time) and trigger but i dd get it done. i need de following i measure the internet with ping. when the internet is not there a false is send. the ping is every 60sec. …

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## [Ten IPCam OSD / overlay text](https://discourse.nodered.org/t/ten-ipcam-osd-overlay-text/40071)

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**Author:** [@Muhonen](https://discourse.nodered.org/u/Muhonen)\
**Replies:** 0\
**Last updated:** [30 January 2021 20:55 UTC](https://discourse.nodered.org/t/ten-ipcam-osd-overlay-text/40071 "2021-01-30T20:55:04Z")

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Ten IPCam OSD / overlay text test dahua, hikvision, foscam milesight, fisheye, hd megapixel, floureon, etc... \[{"id":"4a861abf.3250cc","type":"tab","label":"IPCam OSD text overlay test","disabled":false,"info":""},{"id…

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## [Query WEB pages from PoE switch](https://discourse.nodered.org/t/query-web-pages-from-poe-switch/40014)

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**Author:** [@myWa](https://discourse.nodered.org/u/myWa)\
**Replies:** 8\
**Last updated:** [30 January 2021 20:46 UTC](https://discourse.nodered.org/t/query-web-pages-from-poe-switch/40014 "2021-01-30T20:46:12Z")

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Hello forum, good evening. I'm new here and have a question about "querying" web pages from IOT devices. I use a PoE switch from Microsens (MS450), which shows me the performance of the respective PoE ports. I would li…

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## [Splitting msg.payload from serial device](https://discourse.nodered.org/t/splitting-msg-payload-from-serial-device/40049)

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**Author:** [@nick](https://discourse.nodered.org/u/nick)\
**Replies:** 2\
**Last updated:** [30 January 2021 20:41 UTC](https://discourse.nodered.org/t/splitting-msg-payload-from-serial-device/40049 "2021-01-30T20:41:42Z")

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Dear all, i was able to set up serial communication between my arduino (Wemos D1) and my RBP that runs node red. sow i am able to read out the values that are sent by the arduino into my node red. but i dont know how …

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## [Hello, Two sliders to one payload (clock time)](https://discourse.nodered.org/t/hello-two-sliders-to-one-payload-clock-time/40063)

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**Author:** [@lassiv](https://discourse.nodered.org/u/lassiv)\
**Replies:** 6\
**Last updated:** [30 January 2021 19:37 UTC](https://discourse.nodered.org/t/hello-two-sliders-to-one-payload-clock-time/40063 "2021-01-30T19:37:43Z")

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Hi all Here ony question. I try to get my sliders to work with my node red flow, but not get that working perfectly. Here is my flow: Blockquote \[{"id":"bfff0ca.6ef8bf","type":"tab","label":"Autolämmitys","disabled"…

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## [Add global options dynamically to ui-dropdown](https://discourse.nodered.org/t/add-global-options-dynamically-to-ui-dropdown/7923)

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**Author:** [@hathemi](https://discourse.nodered.org/u/hathemi)\
**Replies:** 8\
**Last updated:** [30 January 2021 19:23 UTC](https://discourse.nodered.org/t/add-global-options-dynamically-to-ui-dropdown/7923 "2021-01-30T19:23:16Z")

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i have a button in case i want to add other option to dropdown in my dashboard. is there a possible way to add global options dynamically to ui-dropdown ??? thanks in advance.

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## [\[solved\] Set property value from flow variable using jsonata](https://discourse.nodered.org/t/solved-set-property-value-from-flow-variable-using-jsonata/40064)

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**Author:** [@danielo515](https://discourse.nodered.org/u/danielo515)\
**Replies:** 5\
**Last updated:** [30 January 2021 19:16 UTC](https://discourse.nodered.org/t/solved-set-property-value-from-flow-variable-using-jsonata/40064 "2021-01-30T19:16:37Z")

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Hello. I'm trying to use the node change to set a property of the payload to a calculation using a flow context variable. I don't get any error, but I don't get any value either. Is this not supported or what? Didn't f…

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## [Set delay with slider](https://discourse.nodered.org/t/set-delay-with-slider/40021)

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**Author:** [@goebelino](https://discourse.nodered.org/u/goebelino)\
**Replies:** 7\
**Last updated:** [30 January 2021 17:39 UTC](https://discourse.nodered.org/t/set-delay-with-slider/40021 "2021-01-30T17:39:47Z")

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Hello everyone, I tried multiple nodes to get this idea done, but nothing works (delay, eztimer, timer switch...). I need something like a loop with a start/stop function. One button start and stop, or a toggle switch t…

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## [Delete a row from Ui-table](https://discourse.nodered.org/t/delete-a-row-from-ui-table/39973)

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**Author:** [@Kushal](https://discourse.nodered.org/u/Kushal)\
**Replies:** 3\
**Last updated:** [30 January 2021 16:48 UTC](https://discourse.nodered.org/t/delete-a-row-from-ui-table/39973 "2021-01-30T16:48:01Z")

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Hello! I wanted to know how can we delete a row from the UI-table widget just by clicking on it OR by any other way. I don't want to bodge! I have made it work by deleting the entire data and then adding the new data wi…

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## [Updating dependency of an installed node](https://discourse.nodered.org/t/updating-dependency-of-an-installed-node/40046)

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**Author:** [@AleksCee](https://discourse.nodered.org/u/AleksCee)\
**Replies:** 5\
**Last updated:** [30 January 2021 16:15 UTC](https://discourse.nodered.org/t/updating-dependency-of-an-installed-node/40046 "2021-01-30T16:15:22Z")

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Hello, is there a way to change only the dependency of one package without fork, reinstall, reconfigure the complete node? Reason: https://github.com/586837r/node-red-contrib-alexa-remote2/issues/191#issuecomment-770102…

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## [Trying to refer to parts in an array without undefined error?](https://discourse.nodered.org/t/trying-to-refer-to-parts-in-an-array-without-undefined-error/40051)

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**Author:** [@edwardr](https://discourse.nodered.org/u/edwardr)\
**Replies:** 3\
**Last updated:** [30 January 2021 15:52 UTC](https://discourse.nodered.org/t/trying-to-refer-to-parts-in-an-array-without-undefined-error/40051 "2021-01-30T15:52:15Z")

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Hello folks, Coming across a problem I can\`t get around, I thought to address the point in a payload it would be msg.payload.data\[ "Number of which you want"\] But it doesnt work ? If I was wanting to address each va…

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## [EADDRINUSE error](https://discourse.nodered.org/t/eaddrinuse-error/5192)

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**Author:** [@salas81](https://discourse.nodered.org/u/salas81)\
**Replies:** 19\
**Last updated:** [30 January 2021 15:44 UTC](https://discourse.nodered.org/t/eaddrinuse-error/5192 "2021-01-30T15:44:02Z")

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Hi, I'm trying to launch wore-red from terminal but this is the error I get 25 Nov 17:24:18 - \[info\] Welcome to Node-RED 25 Nov 17:24:18 - \[info\] Node-RED version: v0.19.4 25 Nov 17:24:18 - \[info\] Node.js version: v8…

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## [\[Update\] node-red-contrib-sox-utils (beta) 0.4.5](https://discourse.nodered.org/t/update-node-red-contrib-sox-utils-beta-0-4-5/40017)

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**Author:** [@JGKK](https://discourse.nodered.org/u/JGKK)\
**Replies:** 4\
**Last updated:** [30 January 2021 15:09 UTC](https://discourse.nodered.org/t/update-node-red-contrib-sox-utils-beta-0-4-5/40017 "2021-01-30T15:09:14Z")

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Hello, This update brings some minor fixes plus the ability to set the output file dynamically with msg.filename for both the record and convert node. Johannes

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## [Telegram add Chart](https://discourse.nodered.org/t/telegram-add-chart/40037)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 4\
**Last updated:** [30 January 2021 15:08 UTC](https://discourse.nodered.org/t/telegram-add-chart/40037 "2021-01-30T15:08:09Z")

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Hello i have this working Telegram sending! all Fine! But i have crated this Graph/Chart too and would like to add it too to my telegram Message! Is something like that possible? i do use the node-red-contrib-tele…

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## [Dashboard install error](https://discourse.nodered.org/t/dashboard-install-error/40047)

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**Author:** [@easyE4](https://discourse.nodered.org/u/easyE4)\
**Replies:** 2\
**Last updated:** [30 January 2021 14:53 UTC](https://discourse.nodered.org/t/dashboard-install-error/40047 "2021-01-30T14:53:30Z")

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Hi, I am trying to install the dashboard nodes and I always get an error message. The LOG entry looks like this: 0 info it worked if it ends with ok 1 verbose cli \[ 1 verbose cli '/usr/bin/node', 1 verbose cli '…

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## [The use of JSONata](https://discourse.nodered.org/t/the-use-of-jsonata/37692)

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**Author:** [@nileio](https://discourse.nodered.org/u/nileio)\
**Replies:** 14\
**Last updated:** [30 January 2021 14:49 UTC](https://discourse.nodered.org/t/the-use-of-jsonata/37692 "2021-01-30T14:49:30Z")

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Hi everyone, I am keen to know about your experience using Jsonata with Node-RED. I read the documentation back to front many times and since JSON manipulations is a must, I learned it only to use with Node-RED.. it is…

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## [Splitting msg payload fields](https://discourse.nodered.org/t/splitting-msg-payload-fields/40042)

<div class="topic-metadata">

**Author:** [@ScheepersJohan](https://discourse.nodered.org/u/ScheepersJohan)\
**Replies:** 2\
**Last updated:** [30 January 2021 12:30 UTC](https://discourse.nodered.org/t/splitting-msg-payload-fields/40042 "2021-01-30T12:30:25Z")

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I have a incoming message of Now I need two messages out and they need to look like this First one msg.payload.app\_id: "s\*\*\*\*1" msg.payload.payload\_fields.temperature: "27.9" msg.payload.metadata.time: "2021-01-30…

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