# General **URL:** https://discourse.nodered.org/c/general/7.md?page=258 [Latest](https://discourse.nodered.org/latest.md) · [Categories](https://discourse.nodered.org/categories.md) · [Tags](https://discourse.nodered.org/tags.md) **Page:** 259 --- ## [Is it possible to dynamically set length for 'buffer maker' and ' buffer parser'](https://discourse.nodered.org/t/is-it-possible-to-dynamically-set-length-for-buffer-maker-and-buffer-parser/74134)
**Author:** [@Dyslexicbloke](https://discourse.nodered.org/u/Dyslexicbloke)\ **Replies:** 2\ **Last updated:** [24 January 2023 20:03 UTC](https://discourse.nodered.org/t/is-it-possible-to-dynamically-set-length-for-buffer-maker-and-buffer-parser/74134 "2023-01-24T20:03:52Z")
Hi folks, I am putting together a flow to read and write 32bit floats from/to a PLC using Modbus TCP. To be honest it took mw way longer than it should have to get my head around the buffer manipulation nodes but I hav… --- ## [Locations of node\_modules - global vs. local](https://discourse.nodered.org/t/locations-of-node-modules-global-vs-local/74133)
**Author:** [@xtrailrunner](https://discourse.nodered.org/u/xtrailrunner)\ **Replies:** 1\ **Last updated:** [24 January 2023 19:23 UTC](https://discourse.nodered.org/t/locations-of-node-modules-global-vs-local/74133 "2023-01-24T19:23:36Z")
I just started to define the first flows and got confused by the different locations of node-red modules. Using Linux Mint I installed nodejs, npm, node-red and some other modules globally. The location of these modules… --- ## [Help with switch node](https://discourse.nodered.org/t/help-with-switch-node/74096)
**Author:** [@hattemp](https://discourse.nodered.org/u/hattemp)\ **Replies:** 5\ **Last updated:** [24 January 2023 18:28 UTC](https://discourse.nodered.org/t/help-with-switch-node/74096 "2023-01-24T18:28:00Z")
I cannot get a switch node to work with my payload. have ben trying al sort of things but it will not work. I have a reterminal with 4 buttons. it will give payload on the press and the release. I only want to do some… --- ## [ERESOLVE error when trying to remove a contrib node](https://discourse.nodered.org/t/eresolve-error-when-trying-to-remove-a-contrib-node/74074)
**Author:** [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\ **Replies:** 25\ **Last updated:** [24 January 2023 18:00 UTC](https://discourse.nodered.org/t/eresolve-error-when-trying-to-remove-a-contrib-node/74074 "2023-01-24T18:00:29Z")
Whenever I try to update or remove a contrib node I get a ERESOLVE error that relates to the node... node-red-contrib-ui-mp4frag. I was unable to remove this node, using Manage palette or npm on the command-line, so I … --- ## [Join node remembering more than it should](https://discourse.nodered.org/t/join-node-remembering-more-than-it-should/74119)
**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\ **Replies:** 7\ **Last updated:** [24 January 2023 15:29 UTC](https://discourse.nodered.org/t/join-node-remembering-more-than-it-should/74119 "2023-01-24T15:29:40Z")
Can someone see if this problem with the Join node is just me please? Be careful not to do anything out of order as the problem has a habit of going away and I am not sure what makes it go. Import the flow below and de… --- ## [Execution time changing inject delay](https://discourse.nodered.org/t/execution-time-changing-inject-delay/74108)
**Author:** [@crester](https://discourse.nodered.org/u/crester)\ **Replies:** 3\ **Last updated:** [24 January 2023 14:03 UTC](https://discourse.nodered.org/t/execution-time-changing-inject-delay/74108 "2023-01-24T14:03:32Z")
Hello. I have an inject delay of 5 minutes executing a flow that checks a device temperature and when reach the allowed high, it switchs ona fan. Same inject stops the fan when the temperature is bellow that high, so t… --- ## [UIBuilder 6.0 step-by-step](https://discourse.nodered.org/t/uibuilder-6-0-step-by-step/73600)
**Author:** [@ralbright-wa](https://discourse.nodered.org/u/ralbright-wa)\ **Replies:** 15\ **Last updated:** [24 January 2023 13:40 UTC](https://discourse.nodered.org/t/uibuilder-6-0-step-by-step/73600 "2023-01-24T13:40:49Z")
Ok... this may sound odd, but I am having a heck of a time getting the UIBuilder to work. I installed the new UIBuilder 6.0 on my Node Red. (This is for an escape room that I am building, following a lot of PlayTech/Alas… --- ## [Nodered table on bootstrap](https://discourse.nodered.org/t/nodered-table-on-bootstrap/74066)
**Author:** [@Akshay51](https://discourse.nodered.org/u/Akshay51)\ **Replies:** 4\ **Last updated:** [24 January 2023 13:37 UTC](https://discourse.nodered.org/t/nodered-table-on-bootstrap/74066 "2023-01-24T13:37:10Z")
Hi guys, I'm trying to create an editable table using Uibuilder and Bootstrap. I've added a sample sqlite table from nodered using axios.get. I needed to make the table editable by adding links to the cells, showing fo… --- ## [Node-red behind Traefik proxy problem](https://discourse.nodered.org/t/node-red-behind-traefik-proxy-problem/71763)
**Author:** [@peterda](https://discourse.nodered.org/u/peterda)\ **Replies:** 10\ **Last updated:** [24 January 2023 11:46 UTC](https://discourse.nodered.org/t/node-red-behind-traefik-proxy-problem/71763 "2023-01-24T11:46:45Z")
I have my Node-Red installation behind a traefik proxy using basicAuth. With basicAuth middleware enabled i get the nodered banner and nothing more. fqdn/ui shows my UI and works. When i disable basicAuth as middlewar… --- ## [Failed to launch the browser process](https://discourse.nodered.org/t/failed-to-launch-the-browser-process/73453)
**Author:** [@grotesmurf10](https://discourse.nodered.org/u/grotesmurf10)\ **Replies:** 4\ **Last updated:** [24 January 2023 11:30 UTC](https://discourse.nodered.org/t/failed-to-launch-the-browser-process/73453 "2023-01-24T11:30:42Z")
after installing "node-red-contrib-whatsapp-link" node red won't start anymore. Can anybody help me with this problem? i can't disable the node on the normal way because NR won't start. this is the log: Add-on version… --- ## [Run flow only if precondition is met?](https://discourse.nodered.org/t/run-flow-only-if-precondition-is-met/74106)
**Author:** [@reibuehl](https://discourse.nodered.org/u/reibuehl)\ **Replies:** 3\ **Last updated:** [24 January 2023 09:53 UTC](https://discourse.nodered.org/t/run-flow-only-if-precondition-is-met/74106 "2023-01-24T09:53:44Z")
I have created a flow that reminds me if windows are open for a longer period of time but I only want to get the reminder if the outside temperature is below a certain threshold. I have the temperature already in the flo… --- ## [Fd\_children error](https://discourse.nodered.org/t/fd-children-error/74102)
**Author:** [@smanjunath211](https://discourse.nodered.org/u/smanjunath211)\ **Replies:** 3\ **Last updated:** [24 January 2023 07:48 UTC](https://discourse.nodered.org/t/fd-children-error/74102 "2023-01-24T07:48:02Z")
I have a perfectly working setup where i call in a popup grid for a ok/cancel sort of dialogue. i just copied the whole setup to another tab with similar requirement, and changed the connected tab / grid /node id etc. … --- ## [Form together with dropzone, send the images into the pdf](https://discourse.nodered.org/t/form-together-with-dropzone-send-the-images-into-the-pdf/74101)
**Author:** [@felipeneves](https://discourse.nodered.org/u/felipeneves)\ **Replies:** 0\ **Last updated:** [24 January 2023 02:53 UTC](https://discourse.nodered.org/t/form-together-with-dropzone-send-the-images-into-the-pdf/74101 "2023-01-24T02:53:46Z")
Guys, hello everyone!!!! Firstly, I'm not a programmer, sometimes when I have a project, I try to "program" a little, in the end, I really like it. But my area is networks, anyway. Come on. Everything I created so far … --- ## [Extract data from object based on its place in the object](https://discourse.nodered.org/t/extract-data-from-object-based-on-its-place-in-the-object/74040)
**Author:** [@TimC1986](https://discourse.nodered.org/u/TimC1986)\ **Replies:** 13\ **Last updated:** [23 January 2023 22:35 UTC](https://discourse.nodered.org/t/extract-data-from-object-based-on-its-place-in-the-object/74040 "2023-01-23T22:35:51Z")
Hello, How can I use a value from a object, based on its place in the object? I use a API that returns a result: the problem is that the date is part of the object and will change every day. I'm only interested in t… --- ## [Status node to send status at regular intervals](https://discourse.nodered.org/t/status-node-to-send-status-at-regular-intervals/74077)
**Author:** [@Josh](https://discourse.nodered.org/u/Josh)\ **Replies:** 6\ **Last updated:** [23 January 2023 21:06 UTC](https://discourse.nodered.org/t/status-node-to-send-status-at-regular-intervals/74077 "2023-01-23T21:06:16Z")
Hi Forum, I was exploring the status node and found that there was no option to configure intervals of the status being sent. Is there any way possible to do that? --- ## [Module did not self-register @serialport](https://discourse.nodered.org/t/module-did-not-self-register-serialport/74027)
**Author:** [@leifnel](https://discourse.nodered.org/u/leifnel)\ **Replies:** 6\ **Last updated:** [23 January 2023 20:59 UTC](https://discourse.nodered.org/t/module-did-not-self-register-serialport/74027 "2023-01-23T20:59:35Z")
I had to reinstall my raspberry pi zero I copied the old ~/.node-red to the new, and then ran the update-script. So I have the same flows as before. I get this in the log: foo - Error: Module did not self-register: '… --- ## [Cant't load Javascript files in uibuilder](https://discourse.nodered.org/t/cantt-load-javascript-files-in-uibuilder/73917)
**Author:** [@miladmrm](https://discourse.nodered.org/u/miladmrm)\ **Replies:** 8\ **Last updated:** [23 January 2023 17:46 UTC](https://discourse.nodered.org/t/cantt-load-javascript-files-in-uibuilder/73917 "2023-01-23T17:46:40Z")
I use uibuilder to manage my front-end. I have several HTML pages and each page has it's own Javascript files, but I have problem with one of them, sometimes and recurersly i got this error. Uncaught TypeError: a.socket… --- ## [Timeline Plot - to record events on a timeline](https://discourse.nodered.org/t/timeline-plot-to-record-events-on-a-timeline/73958)
**Author:** [@smanjunath211](https://discourse.nodered.org/u/smanjunath211)\ **Replies:** 17\ **Last updated:** [23 January 2023 16:38 UTC](https://discourse.nodered.org/t/timeline-plot-to-record-events-on-a-timeline/73958 "2023-01-23T16:38:07Z")
Continuing the discussion from :rocket: \[FlexDash\] alpha release - a dashboard for Node-RED: @tve Is there an updated version of this ? i am unable to find a demo/example for this. i have moved most of my current dashbo… --- ## [Otgw working example](https://discourse.nodered.org/t/otgw-working-example/74084)
**Author:** [@dick](https://discourse.nodered.org/u/dick)\ **Replies:** 3\ **Last updated:** [23 January 2023 15:32 UTC](https://discourse.nodered.org/t/otgw-working-example/74084 "2023-01-23T15:32:29Z")
Is there anybody who can gives me an example for the open-red-otgw. http:// node-red/opentherm/node-red-contrib-otgw I tried several efforts eg serial input wifi Dick --- ## [Write rights on USB stick](https://discourse.nodered.org/t/write-rights-on-usb-stick/73481)
**Author:** [@jw\_te\_r](https://discourse.nodered.org/u/jw_te_r)\ **Replies:** 6\ **Last updated:** [23 January 2023 12:25 UTC](https://discourse.nodered.org/t/write-rights-on-usb-stick/73481 "2023-01-23T12:25:45Z")
Hi all, I have a bit of a noob question; couldn't find the answer yet: I'm running Node-Red on a Linux NUC pc, and I want to be able to write some logging info to a USB stick. So I began with nodes to determine whether… --- ## [Water level in TANK](https://discourse.nodered.org/t/water-level-in-tank/73947)
**Author:** [@pierrot](https://discourse.nodered.org/u/pierrot)\ **Replies:** 5\ **Last updated:** [23 January 2023 11:54 UTC](https://discourse.nodered.org/t/water-level-in-tank/73947 "2023-01-23T11:54:44Z")
Hello Guys, we install JSN-SR04T in a water tank with 120cm height . and below is the code but my problem is that the tank now is empty but it gives me 80% when pressing the button \[ { "id": "2a29abc4.be43… --- ## [Http request send data format](https://discourse.nodered.org/t/http-request-send-data-format/74041)
**Author:** [@sahar](https://discourse.nodered.org/u/sahar)\ **Replies:** 19\ **Last updated:** [23 January 2023 10:58 UTC](https://discourse.nodered.org/t/http-request-send-data-format/74041 "2023-01-23T10:58:29Z")
hi , I try to send sensors data to db with http request node , connection with db is ok ,New record created successfully. but data is empty at db , i think my problem is how i send data : {"sensor":"ran","location":"ir… --- ## [Email node sending as attachment instead of html](https://discourse.nodered.org/t/email-node-sending-as-attachment-instead-of-html/74058)
**Author:** [@pepeday](https://discourse.nodered.org/u/pepeday)\ **Replies:** 11\ **Last updated:** [22 January 2023 20:41 UTC](https://discourse.nodered.org/t/email-node-sending-as-attachment-instead-of-html/74058 "2023-01-22T20:41:34Z")
So I've noticed some strange behaviour which I can't pinpoint why is happening. I am using an email node to send emails. My payload is html content. When I specify the "to" field in the email node itself, the email is … --- ## [Two instances of Node-Red communicating via TTN (MQTT)?](https://discourse.nodered.org/t/two-instances-of-node-red-communicating-via-ttn-mqtt/74048)
**Author:** [@zeirix](https://discourse.nodered.org/u/zeirix)\ **Replies:** 2\ **Last updated:** [22 January 2023 17:55 UTC](https://discourse.nodered.org/t/two-instances-of-node-red-communicating-via-ttn-mqtt/74048 "2023-01-22T17:55:56Z")
Hello everybody, I've some questions about using TTN as a message broker for Node-Red. Is it possible, that an instance of Node-Red is sending messages via TTN (MQTT, HTTP) to another instance of Node-Red, thus avoid… --- ## [Mustache array problem](https://discourse.nodered.org/t/mustache-array-problem/74021)
**Author:** [@danieleronchi](https://discourse.nodered.org/u/danieleronchi)\ **Replies:** 4\ **Last updated:** [22 January 2023 17:35 UTC](https://discourse.nodered.org/t/mustache-array-problem/74021 "2023-01-22T17:35:10Z")
Good evening, i'm having some trouble about this: after a query in mysql i have this result payload\[2\]\[0\]\["@id"\], i need to get this data in a html template using mustache. How can i do it? {{payload.array.2.0.@id}} d… --- ## [Modbus RTU Failure](https://discourse.nodered.org/t/modbus-rtu-failure/73916)
**Author:** [@Becker](https://discourse.nodered.org/u/Becker)\ **Replies:** 6\ **Last updated:** [22 January 2023 16:17 UTC](https://discourse.nodered.org/t/modbus-rtu-failure/73916 "2023-01-22T16:17:01Z")
Hi, I´m using a RS485 -\> USB Donlge ( DSD TECH SH-U11F) since 12/2021 with 4x Eastron SDM meter. Until last month I used 3x SDM72v2 & 1xSDM230 with 9600 baud. last month I replaced SDM230 to SDM630v2. With SDM630v2 I … --- ## [NR "needs" IPv6?](https://discourse.nodered.org/t/nr-needs-ipv6/74034)
**Author:** [@LosinIt](https://discourse.nodered.org/u/LosinIt)\ **Replies:** 2\ **Last updated:** [22 January 2023 14:34 UTC](https://discourse.nodered.org/t/nr-needs-ipv6/74034 "2023-01-22T14:34:47Z")
I have been running NR in Docker for over 3 years and never once had a problem with outbound connections until today when I disabled IPv6 in the host's kernel. After doing so I found that all outbound IP connections from… --- ## [Can I read data in Alexa (thermostat temperatures) from Node-RED?](https://discourse.nodered.org/t/can-i-read-data-in-alexa-thermostat-temperatures-from-node-red/74045)
**Author:** [@hoegge](https://discourse.nodered.org/u/hoegge)\ **Replies:** 2\ **Last updated:** [22 January 2023 13:29 UTC](https://discourse.nodered.org/t/can-i-read-data-in-alexa-thermostat-temperatures-from-node-red/74045 "2023-01-22T13:29:15Z")
My Danfoss thermostats can be added to Alexa, so I can see and set temperatures. I just use Alexa on my phone. Is there any way to read these values from Node-Red? Thanks in advance --- ## [Create hexadecimal number \[modbus ID\] to byte array](https://discourse.nodered.org/t/create-hexadecimal-number-modbus-id-to-byte-array/73985)
**Author:** [@Guudiin](https://discourse.nodered.org/u/Guudiin)\ **Replies:** 1\ **Last updated:** [22 January 2023 11:44 UTC](https://discourse.nodered.org/t/create-hexadecimal-number-modbus-id-to-byte-array/73985 "2023-01-22T11:44:45Z")
I need to select different ids in the dashboard and convert this value to be accepted in Buffer.from I'm leaving an example of what I'm trying to build. Help !!! \[{"id":"47900d60d1fbef96","type":"tab","label":"Flow 2",… --- ## [I cant fine count](https://discourse.nodered.org/t/i-cant-fine-count/74042)
**Author:** [@fernppc](https://discourse.nodered.org/u/fernppc)\ **Replies:** 1\ **Last updated:** [22 January 2023 09:10 UTC](https://discourse.nodered.org/t/i-cant-fine-count/74042 "2023-01-22T09:10:26Z")
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