# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=202

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

**Page:** 203

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## [Http with rasp pi 4](https://discourse.nodered.org/t/http-with-rasp-pi-4/79168)

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**Author:** [@issambfs1](https://discourse.nodered.org/u/issambfs1)\
**Replies:** 0\
**Last updated:** [13 June 2023 10:01 UTC](https://discourse.nodered.org/t/http-with-rasp-pi-4/79168 "2023-06-13T10:01:51Z")

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hi . is there anyone have an idea about how can i get or post http via serial node . i m connecting sim900 to pi via tx rx i already send the msg via sms \[{"id":"c8b7034bc8dfcbf9","type":"inject","z":"6a54e01602038910"…

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## [Probleme of installing the tensorflow node](https://discourse.nodered.org/t/probleme-of-installing-the-tensorflow-node/79114)

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**Author:** [@amine1](https://discourse.nodered.org/u/amine1)\
**Replies:** 2\
**Last updated:** [13 June 2023 06:56 UTC](https://discourse.nodered.org/t/probleme-of-installing-the-tensorflow-node/79114 "2023-06-13T06:56:48Z")

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hi, i have a node version 16.16.0 and NPM 9.7.3 ,i tried to install the tensorflow node i get this by installing it directly from palette 2023-06-11T14:34:44.373Z Install : node-red-contrib-tensorflow 0.4.2 2023-06-11T…

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## [Dashboard unreachable from time to time](https://discourse.nodered.org/t/dashboard-unreachable-from-time-to-time/79136)

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**Author:** [@Pinky](https://discourse.nodered.org/u/Pinky)\
**Replies:** 2\
**Last updated:** [13 June 2023 06:53 UTC](https://discourse.nodered.org/t/dashboard-unreachable-from-time-to-time/79136 "2023-06-13T06:53:27Z")

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Good morning everyone, I am experiencing some downtimes of node-red for quite a while now. It seems that node-red is "busy" for a few Minutes from time to time. In this period I can't access the Dashboard. Alexa command…

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## [Filter json database with conditions](https://discourse.nodered.org/t/filter-json-database-with-conditions/78975)

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**Author:** [@EL\_tech](https://discourse.nodered.org/u/EL_tech)\
**Replies:** 11\
**Last updated:** [12 June 2023 20:46 UTC](https://discourse.nodered.org/t/filter-json-database-with-conditions/78975 "2023-06-12T20:46:54Z")

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Hello, I have a variable json database like this format { "success": true, "center": { "lot": 88, "lng": 99 }, "results": \[ { "id": 8524, "name": "Kkkk", …

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## [Capture \[info\] \[e-mail:example@test.com\] events from log to file](https://discourse.nodered.org/t/capture-info-e-mail-example-test-com-events-from-log-to-file/79149)

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**Author:** [@JohnnyPicnic](https://discourse.nodered.org/u/JohnnyPicnic)\
**Replies:** 3\
**Last updated:** [12 June 2023 16:39 UTC](https://discourse.nodered.org/t/capture-info-e-mail-example-test-com-events-from-log-to-file/79149 "2023-06-12T16:39:22Z")

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Is it possible to watch the log for specific info events that are outgoing e-mails? I would like to send all \[info\] \[e-mail:example@test\] events to a separate file.

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## [Http-in node & payload too large](https://discourse.nodered.org/t/http-in-node-payload-too-large/79077)

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**Author:** [@gregorius](https://discourse.nodered.org/u/gregorius)\
**Replies:** 14\
**Last updated:** [12 June 2023 13:37 UTC](https://discourse.nodered.org/t/http-in-node-payload-too-large/79077 "2023-06-12T13:37:02Z")

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Hi There! I'm using a http-in node to post data to my flow. Sometime when I post somethin that is larger than apiMaxLength (i.e. 5mb), I get a PayloadTooLarge error in the console of Node-RED. i.e. my node-red docker c…

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## [Daikin node-red-contrib-daikin-ac palette error ECONNRESET](https://discourse.nodered.org/t/daikin-node-red-contrib-daikin-ac-palette-error-econnreset/79146)

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**Author:** [@Mikee1234K](https://discourse.nodered.org/u/Mikee1234K)\
**Replies:** 0\
**Last updated:** [12 June 2023 13:31 UTC](https://discourse.nodered.org/t/daikin-node-red-contrib-daikin-ac-palette-error-econnreset/79146 "2023-06-12T13:31:10Z")

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I regulary see this error below my Daikin nodes. Sometimes a inject with a simpel timestamp will refresh and they connect and go green again. But while they are red they do not report status updates. Is there anything I …

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## [deCONZ error WebSocket disconnected: 1006 -](https://discourse.nodered.org/t/deconz-error-websocket-disconnected-1006/79145)

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**Author:** [@Mikee1234K](https://discourse.nodered.org/u/Mikee1234K)\
**Replies:** 0\
**Last updated:** [12 June 2023 13:23 UTC](https://discourse.nodered.org/t/deconz-error-websocket-disconnected-1006/79145 "2023-06-12T13:23:37Z")

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I had to re-authorize my deconz nodes, which worked ok initially. The node says connected, but a second later I get a red dot under it with 1006. In the debug window it shows "WebSocket disconnected: 1006 - "

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## [Sending an email through Node-RED](https://discourse.nodered.org/t/sending-an-email-through-node-red/77958)

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**Author:** [@Shyama\_Gupta](https://discourse.nodered.org/u/Shyama_Gupta)\
**Replies:** 9\
**Last updated:** [12 June 2023 13:08 UTC](https://discourse.nodered.org/t/sending-an-email-through-node-red/77958 "2023-06-12T13:08:39Z")

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How can I send an email on outlook through Node-RED where the email consists of data of the function node?

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## [Ajax form file upload - catch file write error](https://discourse.nodered.org/t/ajax-form-file-upload-catch-file-write-error/79062)

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**Author:** [@Mick](https://discourse.nodered.org/u/Mick)\
**Replies:** 9\
**Last updated:** [12 June 2023 09:04 UTC](https://discourse.nodered.org/t/ajax-form-file-upload-catch-file-write-error/79062 "2023-06-12T09:04:05Z")

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I found a flow created by Nick using Ajax form for uploading files. I have modified it to write to the filesystem and it works great. I want to be able to pass the success or fail from the file write node back to the f…

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## [Setting HA Generic Thermostat temperature from Node Red Function Node](https://discourse.nodered.org/t/setting-ha-generic-thermostat-temperature-from-node-red-function-node/79109)

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**Author:** [@d\_tech](https://discourse.nodered.org/u/d_tech)\
**Replies:** 10\
**Last updated:** [12 June 2023 08:26 UTC](https://discourse.nodered.org/t/setting-ha-generic-thermostat-temperature-from-node-red-function-node/79109 "2023-06-12T08:26:44Z")

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Hi, Im trying to set the temperature of the Home Assistant Generic Thermostat from a node red function node. The attribute in node red is as follows Have tried something like this. global.set("homeassistant.home…

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## [Compare images or measure distances](https://discourse.nodered.org/t/compare-images-or-measure-distances/79133)

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**Author:** [@curana](https://discourse.nodered.org/u/curana)\
**Replies:** 1\
**Last updated:** [12 June 2023 06:51 UTC](https://discourse.nodered.org/t/compare-images-or-measure-distances/79133 "2023-06-12T06:51:26Z")

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Hi, I have a IBC container in my garden to collect rain water. There are different ways of measuring the amount of water. My idea is the following: I have a surveillance camera pointed to the container and I was think…

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## [Alexa event node not firing reliably any more](https://discourse.nodered.org/t/alexa-event-node-not-firing-reliably-any-more/79116)

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**Author:** [@Mikee1234K](https://discourse.nodered.org/u/Mikee1234K)\
**Replies:** 2\
**Last updated:** [12 June 2023 06:50 UTC](https://discourse.nodered.org/t/alexa-event-node-not-firing-reliably-any-more/79116 "2023-06-12T06:50:33Z")

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I am using the node-red-contrib-alexa-remote2-applestrudel palette 5.0.27. This has been working reliably for ages. Lately I noticed I had to say voice commands, which I intercept via the alexa event node and process in …

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## [Control Shelly via Node-Red](https://discourse.nodered.org/t/control-shelly-via-node-red/78969)

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**Author:** [@Pinky](https://discourse.nodered.org/u/Pinky)\
**Replies:** 7\
**Last updated:** [12 June 2023 06:32 UTC](https://discourse.nodered.org/t/control-shelly-via-node-red/78969 "2023-06-12T06:32:23Z")

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Hi everyone, I am a little bit confused. I have a new Shelly Plus 2PM in my network and am able to access it via node red with "node-red-contrib-shelly" Injecting it returns a payload like this: {"input0":{"id":0,"st…

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## [Switch node not triggering](https://discourse.nodered.org/t/switch-node-not-triggering/79113)

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**Author:** [@Mikee1234K](https://discourse.nodered.org/u/Mikee1234K)\
**Replies:** 7\
**Last updated:** [11 June 2023 21:19 UTC](https://discourse.nodered.org/t/switch-node-not-triggering/79113 "2023-06-11T21:19:22Z")

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I have a switch node which checks a Alexa node for voice commands. Many of them work, but I have one in particular which doesnt and I am struggling to understand why... In the screenshot, lights on, lights off, tv on al…

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## [How to get "real name" of node?](https://discourse.nodered.org/t/how-to-get-real-name-of-node/79058)

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**Author:** [@nosered1966](https://discourse.nodered.org/u/nosered1966)\
**Replies:** 6\
**Last updated:** [11 June 2023 20:09 UTC](https://discourse.nodered.org/t/how-to-get-real-name-of-node/79058 "2023-06-11T20:09:28Z")

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Hi all, how do I get the name of a node ( I mean the name of the node I have to search for when I want to install the node ( let's name it "real name") in Node-RED using "manage palette")? Example: When I select a nod…

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## [Please help me to install opencv on node-red](https://discourse.nodered.org/t/please-help-me-to-install-opencv-on-node-red/79115)

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**Author:** [@Surfb](https://discourse.nodered.org/u/Surfb)\
**Replies:** 0\
**Last updated:** [11 June 2023 17:35 UTC](https://discourse.nodered.org/t/please-help-me-to-install-opencv-on-node-red/79115 "2023-06-11T17:35:11Z")

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I want to carry out a facial recognition project and I need to install opencv in node-red if you could help me please, I have node-red installed in windows

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## [Alexa connection with wemo emulator](https://discourse.nodered.org/t/alexa-connection-with-wemo-emulator/78824)

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**Author:** [@lessi](https://discourse.nodered.org/u/lessi)\
**Replies:** 11\
**Last updated:** [11 June 2023 12:16 UTC](https://discourse.nodered.org/t/alexa-connection-with-wemo-emulator/78824 "2023-06-11T12:16:29Z")

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Hello, I am using the wemo emulator to trigger Alexa to speak. The emulator allows me to create a virtual sensor, which is triggered by my voice command to alexa and then in return triggers alexa to output a certain tex…

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## [Low battery or dead devices domoticz mqtt](https://discourse.nodered.org/t/low-battery-or-dead-devices-domoticz-mqtt/79108)

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**Author:** [@nodouser](https://discourse.nodered.org/u/nodouser)\
**Replies:** 5\
**Last updated:** [11 June 2023 11:39 UTC](https://discourse.nodered.org/t/low-battery-or-dead-devices-domoticz-mqtt/79108 "2023-06-11T11:39:41Z")

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Hi, I am looking for a node or flow to check the status of batteries and dead devices. Somebody with a good solution? Or examples.

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## [Sunset and sunrise issue with eztimer](https://discourse.nodered.org/t/sunset-and-sunrise-issue-with-eztimer/79104)

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**Author:** [@atif-aljohani](https://discourse.nodered.org/u/atif-aljohani)\
**Replies:** 1\
**Last updated:** [11 June 2023 09:06 UTC](https://discourse.nodered.org/t/sunset-and-sunrise-issue-with-eztimer/79104 "2023-06-11T09:06:22Z")

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sunset and sunrise issue with eztimer that it can not start more than one switch at the time so please assist me I'm using ewelink cube with sonoff switches

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## [NodeRed - Whatsapp](https://discourse.nodered.org/t/nodered-whatsapp/79088)

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**Author:** [@DineshYamali](https://discourse.nodered.org/u/DineshYamali)\
**Replies:** 2\
**Last updated:** [11 June 2023 06:04 UTC](https://discourse.nodered.org/t/nodered-whatsapp/79088 "2023-06-11T06:04:13Z")

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Hello Folks, Is there any way to send documents to WhatsApp using Node Red? I have tried SendDocument node but getting "UnAuthroized" error. Please note am new to NodeRed :slight\_smile: appreciate your support.

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## [How can start a node at the start of NodeRed?](https://discourse.nodered.org/t/how-can-start-a-node-at-the-start-of-nodered/79059)

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**Author:** [@Yury](https://discourse.nodered.org/u/Yury)\
**Replies:** 19\
**Last updated:** [10 June 2023 22:07 UTC](https://discourse.nodered.org/t/how-can-start-a-node-at-the-start-of-nodered/79059 "2023-06-10T22:07:07Z")

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Hello It is necessary that when Code RED starts, personal functions are loaded, i.e. that the code in the Function node is executed: const utilityFunctions = { myFunction: function(x, y) { return x + y …

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## [Print using CUPS](https://discourse.nodered.org/t/print-using-cups/78943)

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**Author:** [@Jhontan14](https://discourse.nodered.org/u/Jhontan14)\
**Replies:** 11\
**Last updated:** [10 June 2023 21:06 UTC](https://discourse.nodered.org/t/print-using-cups/78943 "2023-06-10T21:06:20Z")

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Hello, I have a ZD30 printer installed in IoT 2050 gateway using CUPS, I want to know if there is any way to send to print from node-RED?

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## [Uibuilder with a href](https://discourse.nodered.org/t/uibuilder-with-a-href/79079)

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**Author:** [@allacmc](https://discourse.nodered.org/u/allacmc)\
**Replies:** 5\
**Last updated:** [9 June 2023 15:27 UTC](https://discourse.nodered.org/t/uibuilder-with-a-href/79079 "2023-06-09T15:27:02Z")

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I need to turn to my friends, beasts. Do you have any idea how? Click on this link (which is a datatable) and it opens the report embedded in the UI\_BUILDER? But with the data loaded? Below are the screens I want to m…

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## [Access to advanced Z-Wave properties with node-red-contrib-zwave-js](https://discourse.nodered.org/t/access-to-advanced-z-wave-properties-with-node-red-contrib-zwave-js/78906)

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**Author:** [@Mamonetti](https://discourse.nodered.org/u/Mamonetti)\
**Replies:** 3\
**Last updated:** [9 June 2023 09:21 UTC](https://discourse.nodered.org/t/access-to-advanced-z-wave-properties-with-node-red-contrib-zwave-js/78906 "2023-06-09T09:21:14Z")

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I'd like to know if there's any way to access to the advanced configuration properties offered by some Z-Wave devices using node-red-contrib-zwave-js. In the ZWave JS panel, when you select a device, you see the typical…

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## [Uibuilder + reverse proxy](https://discourse.nodered.org/t/uibuilder-reverse-proxy/78691)

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**Author:** [@NickXML](https://discourse.nodered.org/u/NickXML)\
**Replies:** 7\
**Last updated:** [9 June 2023 04:19 UTC](https://discourse.nodered.org/t/uibuilder-reverse-proxy/78691 "2023-06-09T04:19:16Z")

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As it turns out, ChatGPT is a decent JavaScript coach. Since my last post, I've been able to create a fully working dynamic web form without relying on the low-code components in uibuilder. Very happy with the results. I…

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## [Use npm to update a node](https://discourse.nodered.org/t/use-npm-to-update-a-node/79068)

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**Author:** [@davidz](https://discourse.nodered.org/u/davidz)\
**Replies:** 6\
**Last updated:** [8 June 2023 21:37 UTC](https://discourse.nodered.org/t/use-npm-to-update-a-node/79068 "2023-06-08T21:37:21Z")

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Node-RED is installed on Pi with the standard script : bash \<(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered) Is it possible to update a node such as Dashboard…

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## [Calculation of integral of two datasets for photovoltaics power generation](https://discourse.nodered.org/t/calculation-of-integral-of-two-datasets-for-photovoltaics-power-generation/79067)

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**Author:** [@lessi](https://discourse.nodered.org/u/lessi)\
**Replies:** 3\
**Last updated:** [8 June 2023 20:37 UTC](https://discourse.nodered.org/t/calculation-of-integral-of-two-datasets-for-photovoltaics-power-generation/79067 "2023-06-08T20:37:01Z")

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Hello, I have some photovoltaic panels and would like to know how much energy I am producing and actually using. The panels are connected to a shelly from which I get the current generated power (among other data) in …

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## ["RequestError: self-signed certificate"](https://discourse.nodered.org/t/requesterror-self-signed-certificate/79017)

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**Author:** [@CJ10](https://discourse.nodered.org/u/CJ10)\
**Replies:** 6\
**Last updated:** [8 June 2023 19:19 UTC](https://discourse.nodered.org/t/requesterror-self-signed-certificate/79017 "2023-06-08T19:19:45Z")

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I am trying to scrape some information from a webpage but I seem to be failing at the first hurdle. I get an error on teh http request of "RequestError: self-signed certificate" Is there a way I can get around this?

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## [Function node code problems](https://discourse.nodered.org/t/function-node-code-problems/79033)

<div class="topic-metadata">

**Author:** [@btbr](https://discourse.nodered.org/u/btbr)\
**Replies:** 26\
**Last updated:** [8 June 2023 15:11 UTC](https://discourse.nodered.org/t/function-node-code-problems/79033 "2023-06-08T15:11:00Z")

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I am trying to write some code for a function node and I've been trying for a while and can't get close. I have three inputs - 24h time (cron node) topic - lights (1 on and 0 off depending on time of day) MQTT node se…

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