# General **URL:** https://discourse.nodered.org/c/general/7.md?page=868 [Latest](https://discourse.nodered.org/latest.md) · [Categories](https://discourse.nodered.org/categories.md) · [Tags](https://discourse.nodered.org/tags.md) **Page:** 869 --- ## [Rpi-backlight not working in a function](https://discourse.nodered.org/t/rpi-backlight-not-working-in-a-function/13108)
**Author:** [@injector22](https://discourse.nodered.org/u/injector22)\ **Replies:** 7\ **Last updated:** [10 July 2019 17:15 UTC](https://discourse.nodered.org/t/rpi-backlight-not-working-in-a-function/13108 "2019-07-10T17:15:08Z")
Has anyone gotten this package to work? All I keep getting is blank returns no matter what method I use. It also won't write to the brightness file. --- ## [Issue parsing MQTT data](https://discourse.nodered.org/t/issue-parsing-mqtt-data/8032)
**Author:** [@rvexodus](https://discourse.nodered.org/u/rvexodus)\ **Replies:** 3\ **Last updated:** [10 July 2019 13:59 UTC](https://discourse.nodered.org/t/issue-parsing-mqtt-data/8032 "2019-07-10T13:59:49Z")
I have an MQTT node configured which is pulling data from a Victron Inverter. I'm receiving the payload in the following format: 2/15/2019, 5:11:26 PMnode: 73afd856.bf16c8N/removed\_my\_portal\_id/battery/258/Soc : msg.pay… --- ## [Behind Traefik proxy, cert shows valid but still insecure?](https://discourse.nodered.org/t/behind-traefik-proxy-cert-shows-valid-but-still-insecure/13059)
**Author:** [@VinistoisR](https://discourse.nodered.org/u/VinistoisR)\ **Replies:** 5\ **Last updated:** [10 July 2019 12:29 UTC](https://discourse.nodered.org/t/behind-traefik-proxy-cert-shows-valid-but-still-insecure/13059 "2019-07-10T12:29:18Z")
I have my node-red running in docker behind the Traefik proxy. Traefik terminates ssl at nodered.mydomain.com, and forwards the traffic to the 1880 port of the container. In my browser, node-red loads normally but the … --- ## [Ibm App-ID and Node-red as an app](https://discourse.nodered.org/t/ibm-app-id-and-node-red-as-an-app/11800)
**Author:** [@bryan-ninjamoba](https://discourse.nodered.org/u/bryan-ninjamoba)\ **Replies:** 1\ **Last updated:** [10 July 2019 10:02 UTC](https://discourse.nodered.org/t/ibm-app-id-and-node-red-as-an-app/11800 "2019-07-10T10:02:27Z")
Has anyone successfully connected to a node-red app hosted on bluemix.net via IBM App-ID ? If you did how did you do it? Any suggestions? --- ## [Serial port will not work with cable already plugged in](https://discourse.nodered.org/t/serial-port-will-not-work-with-cable-already-plugged-in/1560)
**Author:** [@willemx](https://discourse.nodered.org/u/willemx)\ **Replies:** 33\ **Last updated:** [21 July 2018 19:13 UTC](https://discourse.nodered.org/t/serial-port-will-not-work-with-cable-already-plugged-in/1560 "2018-07-21T19:13:31Z")
I am using NR on a Raspberry Pi B3+ to display the status of my smart electricity meter (Dutch: "slimme meter") using some form of serial to USB cable (this one: https://www.sossolutions.nl/slimme-meter-kabel). This devi… --- ## [Going around in circles. Logic signals and priorities](https://discourse.nodered.org/t/going-around-in-circles-logic-signals-and-priorities/13058)
**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\ **Replies:** 2\ **Last updated:** [10 July 2019 06:24 UTC](https://discourse.nodered.org/t/going-around-in-circles-logic-signals-and-priorities/13058 "2019-07-10T06:24:36Z")
(Though its better than going around squares - bad attempt at a pun. around......) I've had fun learning more about JS, but I am not sure that has helped me. Problem: I am receiving a message from 3 different machine… --- ## [How to add a second ds18b20](https://discourse.nodered.org/t/how-to-add-a-second-ds18b20/13052)
**Author:** [@ilarioq](https://discourse.nodered.org/u/ilarioq)\ **Replies:** 13\ **Last updated:** [9 July 2019 21:57 UTC](https://discourse.nodered.org/t/how-to-add-a-second-ds18b20/13052 "2019-07-09T21:57:45Z")
Hi everyone, I'm new in the world nodered. I'm a beginner, very beginner, I created a flow that reads the data of a ds18b20 saves them on influx and displayed with grafana. I need help to add a second ds18b20, please i… --- ## [1 large strng from Arduino, 3 msgs from Function, 3 Outputs?](https://discourse.nodered.org/t/1-large-strng-from-arduino-3-msgs-from-function-3-outputs/13006)
**Author:** [@Serg](https://discourse.nodered.org/u/Serg)\ **Replies:** 15\ **Last updated:** [9 July 2019 20:24 UTC](https://discourse.nodered.org/t/1-large-strng-from-arduino-3-msgs-from-function-3-outputs/13006 "2019-07-09T20:24:40Z")
Hi all, Sending from Arduino the data from a sensor (ACS712) in 1 single string. It contains 3 "topic" and "payload", values separates with ":" and between the 3 topics ";" Serial.println ("Analog:"+String(acs712)+";"+… --- ## [Help recovering my instance](https://discourse.nodered.org/t/help-recovering-my-instance/13089)
**Author:** [@biz](https://discourse.nodered.org/u/biz)\ **Replies:** 3\ **Last updated:** [9 July 2019 18:52 UTC](https://discourse.nodered.org/t/help-recovering-my-instance/13089 "2019-07-09T18:52:55Z")
Sooooo long story short i killed my instance of node-red I was using the schedex. I input the cordinates in WITH the W and the N in there. Clicked deploy and crashed my entire instance. While I do have a backup from ye… --- ## [Filtering Arrays](https://discourse.nodered.org/t/filtering-arrays/13048)
**Author:** [@Spammy](https://discourse.nodered.org/u/Spammy)\ **Replies:** 9\ **Last updated:** [9 July 2019 18:36 UTC](https://discourse.nodered.org/t/filtering-arrays/13048 "2019-07-09T18:36:56Z")
How can I filter an array? That is: I have an array of objects, and I want to keep only those that pass a test (in this case that some key equals some value). I've tried splitting, switching and then joining but that d… --- ## [Code behind Azure Save Blob Storage Node](https://discourse.nodered.org/t/code-behind-azure-save-blob-storage-node/12984)
**Author:** [@xoani](https://discourse.nodered.org/u/xoani)\ **Replies:** 5\ **Last updated:** [9 July 2019 12:51 UTC](https://discourse.nodered.org/t/code-behind-azure-save-blob-storage-node/12984 "2019-07-09T12:51:01Z")
Hello. This might be a dumb question but I need to know how the communication works between Node-RED and the Azure Cloud, specifically Blob Storage -\> using the following Node: https://github.com/Azure/node-red-contrib-… --- ## [ALEXA , What is my water temperature?](https://discourse.nodered.org/t/alexa-what-is-my-water-temperature/12950)
**Author:** [@JoseGodinho](https://discourse.nodered.org/u/JoseGodinho)\ **Replies:** 10\ **Last updated:** [9 July 2019 12:14 UTC](https://discourse.nodered.org/t/alexa-what-is-my-water-temperature/12950 "2019-07-09T12:14:34Z")
Hello All Considering that I have A variable in a flow, how can i ask Alexa to read it out loud?. just need the basics, what is the node and config: Thank you in advance José --- ## [Can I specify settings.js for node-red-node-test-helper?](https://discourse.nodered.org/t/can-i-specify-settings-js-for-node-red-node-test-helper/13064)
**Author:** [@fangzhu](https://discourse.nodered.org/u/fangzhu)\ **Replies:** 3\ **Last updated:** [9 July 2019 11:20 UTC](https://discourse.nodered.org/t/can-i-specify-settings-js-for-node-red-node-test-helper/13064 "2019-07-09T11:20:26Z")
I am using node-red-node-test-helper for my test. Generally it runs OK. But one of my test case needs to add some new configuration in settings.js, and I don't know how to do that. I tried to edit the settings.js under … --- ## [MQTT doesn't seem to be happy of late](https://discourse.nodered.org/t/mqtt-doesnt-seem-to-be-happy-of-late/6410)
**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\ **Replies:** 33\ **Last updated:** [9 July 2019 11:06 UTC](https://discourse.nodered.org/t/mqtt-doesnt-seem-to-be-happy-of-late/6410 "2019-07-09T11:06:10Z")
I have had MQTT working for a while now and all is good. Today I am going around updating flows with new code and I am noticing a lot of MQTT TX nodes are showing disconnected for no reason. I know it is advisable for … --- ## [JSON problems - again. (New problem I think)](https://discourse.nodered.org/t/json-problems-again-new-problem-i-think/13066)
**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\ **Replies:** 7\ **Last updated:** [9 July 2019 10:24 UTC](https://discourse.nodered.org/t/json-problems-again-new-problem-i-think/13066 "2019-07-09T10:24:58Z")
I've been down the JSON track a bit. When using MQTT at the remote end I need to pass the data through a JSON node to see the sub sections. Hoping I have got the idea good, I embarked on this new quest. Partly inspire… --- ## [Will moving to another LAN corrupt nodes?](https://discourse.nodered.org/t/will-moving-to-another-lan-corrupt-nodes/13029)
**Author:** [@emme73](https://discourse.nodered.org/u/emme73)\ **Replies:** 5\ **Last updated:** [9 July 2019 06:57 UTC](https://discourse.nodered.org/t/will-moving-to-another-lan-corrupt-nodes/13029 "2019-07-09T06:57:04Z")
Hi, I have a raspberry PI 3b+ with the latest Buster image and nodered 0.26 on it. I've installed at my place (lan 192.168.0/24) and setup a flow using node-red-contrib-homekit-bridged and KNX everything went well. S… --- ## [PiFace digital 2](https://discourse.nodered.org/t/piface-digital-2/13045)
**Author:** [@Biolzibox](https://discourse.nodered.org/u/Biolzibox)\ **Replies:** 8\ **Last updated:** [8 July 2019 18:41 UTC](https://discourse.nodered.org/t/piface-digital-2/13045 "2019-07-08T18:41:45Z")
Hey there. i need some help with my raspberry pi 3+ and piface digtital 2. I have made a control box with a lot of buttons (in) and a 24 volt led light (out) i have used piface digital 2 emulator and seen that all min… --- ## [Opening and closing Garage door with Node-Red and MQTT](https://discourse.nodered.org/t/opening-and-closing-garage-door-with-node-red-and-mqtt/12963)
**Author:** [@NR-Newbie](https://discourse.nodered.org/u/NR-Newbie)\ **Replies:** 5\ **Last updated:** [8 July 2019 14:22 UTC](https://discourse.nodered.org/t/opening-and-closing-garage-door-with-node-red-and-mqtt/12963 "2019-07-08T14:22:45Z")
Hi all, I am entirely new to Node-Red, JSON, Javascript or programming in general. I'm hoping someone can help with what on the face of it seems a very straight forward thing to do, although for now, it's waaay beyond … --- ## [Books I may need to read?](https://discourse.nodered.org/t/books-i-may-need-to-read/13027)
**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\ **Replies:** 12\ **Last updated:** [8 July 2019 11:24 UTC](https://discourse.nodered.org/t/books-i-may-need-to-read/13027 "2019-07-08T11:24:47Z")
Dreading what will come back..... But I have to ask. I know I ask a lot of dumb questions, but.... As NR uses a lot of JavaScript, and my recent problems are with payloads sending fancy stuff to buttons, etc..... I … --- ## [How to change an audio file's volume with a sensor](https://discourse.nodered.org/t/how-to-change-an-audio-files-volume-with-a-sensor/13012)
**Author:** [@f.thinks](https://discourse.nodered.org/u/f.thinks)\ **Replies:** 8\ **Last updated:** [8 July 2019 10:11 UTC](https://discourse.nodered.org/t/how-to-change-an-audio-files-volume-with-a-sensor/13012 "2019-07-08T10:11:13Z")
Hi, i'm new to the node.red world. At university the professor asked my group to do a project with node.red without actually explaining it and i'm really in a bad spot right now. The project is really simple: i need to … --- ## [Can i save all of my sensors data to 1 File then storage it in Firebase](https://discourse.nodered.org/t/can-i-save-all-of-my-sensors-data-to-1-file-then-storage-it-in-firebase/13030)
**Author:** [@quangminh.le0701](https://discourse.nodered.org/u/quangminh.le0701)\ **Replies:** 1\ **Last updated:** [8 July 2019 09:43 UTC](https://discourse.nodered.org/t/can-i-save-all-of-my-sensors-data-to-1-file-then-storage-it-in-firebase/13030 "2019-07-08T09:43:44Z")
Hi, i'm doing IOT project, collecting those sensors below and monitor them using node red. So in the end of the day, i want to save all of the data, then storage it into Firebase (Cloud FireStore or Storage ? which one)?… --- ## [Basic execute command failure](https://discourse.nodered.org/t/basic-execute-command-failure/13023)
**Author:** [@StreamSurfer](https://discourse.nodered.org/u/StreamSurfer)\ **Replies:** 4\ **Last updated:** [8 July 2019 08:19 UTC](https://discourse.nodered.org/t/basic-execute-command-failure/13023 "2019-07-08T08:19:18Z")
Hello everyone. I've been banging my head against the wall for the last hour with execute command. As a basic test, If I run the command vcgencmd measure\_temp in the terminal I receive CPU temp on the raspie. I put this… --- ## [How to detect no coming payload?](https://discourse.nodered.org/t/how-to-detect-no-coming-payload/12933)
**Author:** [@ppungpong](https://discourse.nodered.org/u/ppungpong)\ **Replies:** 2\ **Last updated:** [8 July 2019 03:08 UTC](https://discourse.nodered.org/t/how-to-detect-no-coming-payload/12933 "2019-07-08T03:08:04Z")
I want to check or detect on node-red when no payload is sent because I am connected to the sensor and accept the value I want to know when there is no information sent from the sensor as a warning or anything. How shoul… --- ## [How to access Grafana dashboard with a ui button](https://discourse.nodered.org/t/how-to-access-grafana-dashboard-with-a-ui-button/13001)
**Author:** [@nassima100](https://discourse.nodered.org/u/nassima100)\ **Replies:** 8\ **Last updated:** [7 July 2019 22:47 UTC](https://discourse.nodered.org/t/how-to-access-grafana-dashboard-with-a-ui-button/13001 "2019-07-07T22:47:34Z")
Hello; I'm trying to view the history by accessing Grafana dashboard from my node-red dashboard when I click on a button , but the access isn't authorized , I tried to replace "localhost" or 127.0.0.1 with the IP addres… --- ## [Neopixel @ individual brightness](https://discourse.nodered.org/t/neopixel-individual-brightness/12998)
**Author:** [@klopo36](https://discourse.nodered.org/u/klopo36)\ **Replies:** 7\ **Last updated:** [7 July 2019 21:05 UTC](https://discourse.nodered.org/t/neopixel-individual-brightness/12998 "2019-07-07T21:05:30Z")
Hello everybody. I want wo light up some rooms in my smarthome. And I think Neopixel are perfect for this. Now my plan is to have just one physical Neopixel String. LED 0-20 Living room LED 21-40 Bathroom for example… --- ## [Problems after update](https://discourse.nodered.org/t/problems-after-update/12919)
**Author:** [@rriosalido](https://discourse.nodered.org/u/rriosalido)\ **Replies:** 32\ **Last updated:** [7 July 2019 19:24 UTC](https://discourse.nodered.org/t/problems-after-update/12919 "2019-07-07T19:24:37Z")
I have recently updated my pi with the latest versions. Everything works fine but since the update, when I visualize node-red-log I get, every 30/40 seconds, the next output: Failed to GET info from http://169.254.227.5… --- ## [How to bind the data in template mustache node in array of json format](https://discourse.nodered.org/t/how-to-bind-the-data-in-template-mustache-node-in-array-of-json-format/13002)
**Author:** [@tamiloli.it](https://discourse.nodered.org/u/tamiloli.it)\ **Replies:** 3\ **Last updated:** [7 July 2019 17:33 UTC](https://discourse.nodered.org/t/how-to-bind-the-data-in-template-mustache-node-in-array-of-json-format/13002 "2019-07-07T17:33:09Z")
Hi, I am using template mustache, I get the data into db and convert to json format; After getting data in json how to display in template mustache html; there is any other option use jquery bind the data, please guid… --- ## [\ **Author:** [@mambui](https://discourse.nodered.org/u/mambui)\ **Replies:** 2\ **Last updated:** [7 July 2019 08:45 UTC](https://discourse.nodered.org/t/doctype-html-public-error-accessing-remote-api/12987 "2019-07-07T08:45:34Z") Good day the community, I am trying to post trade from Node Red to an API platform interface. My flow is working well with their demo interface, however when it comes to send trade to the real interface, my flow is not … --- ## [MongoDB extract data](https://discourse.nodered.org/t/mongodb-extract-data/12988)
**Author:** [@ljavih](https://discourse.nodered.org/u/ljavih)\ **Replies:** 0\ **Last updated:** [6 July 2019 21:19 UTC](https://discourse.nodered.org/t/mongodb-extract-data/12988 "2019-07-06T21:19:03Z")
Hi I am using node red and MongoDB (node-red-contrib-mongodb3) to obtain data store it in mongoDB and create charts with the data obtained. I could store the data in MongoDB but I am unable to extract the data from Mongo… --- ## [Palette editor disabled : npm version too old](https://discourse.nodered.org/t/palette-editor-disabled-npm-version-too-old/12979)
**Author:** [@kxkayser](https://discourse.nodered.org/u/kxkayser)\ **Replies:** 6\ **Last updated:** [6 July 2019 21:08 UTC](https://discourse.nodered.org/t/palette-editor-disabled-npm-version-too-old/12979 "2019-07-06T21:08:32Z")
After doing one of my periodic Raspbien stretch updates (using the typical update and upgrade commands), I am receiving the following error when NR starts: Palette editor disabled : npm version too old. Requires npm \>= … [Previous page](https://discourse.nodered.org/c/general/7.md?page=867) [Next page](https://discourse.nodered.org/c/general/7.md?page=869)