# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=522

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

**Page:** 523

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## [Sample rate of analog Inputs (RevolutionPi)](https://discourse.nodered.org/t/sample-rate-of-analog-inputs-revolutionpi/47897)

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**Author:** [@Bastian](https://discourse.nodered.org/u/Bastian)\
**Replies:** 16\
**Last updated:** [16 July 2021 08:17 UTC](https://discourse.nodered.org/t/sample-rate-of-analog-inputs-revolutionpi/47897 "2021-07-16T08:17:54Z")

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Hi there, I'm using a RevPi Compact to manage some analog sensor data. The revpi single input data is written directly to a file to create a list of values. Now I investigated a very low sample rate of about 1-2 value…

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## [Odd bug in comment node](https://discourse.nodered.org/t/odd-bug-in-comment-node/48464)

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**Author:** [@drmibell](https://discourse.nodered.org/u/drmibell)\
**Replies:** 4\
**Last updated:** [16 July 2021 08:08 UTC](https://discourse.nodered.org/t/odd-bug-in-comment-node/48464 "2021-07-16T08:08:12Z")

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Node-RED version: v1.3.5 Node.js version: v12.19.0 \[{"id":"51ea8e42.9005c","type":"comment","z":"3cd40fb9.7975d","name":"hasOwnProperty","info":"","x":510,"y":620,"wires":\[\]},{"id":"fedb34cd.f530b8","type":"comment…

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## [Detect if temperature is rising, falling or is stable](https://discourse.nodered.org/t/detect-if-temperature-is-rising-falling-or-is-stable/48462)

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**Author:** [@calania](https://discourse.nodered.org/u/calania)\
**Replies:** 4\
**Last updated:** [16 July 2021 07:06 UTC](https://discourse.nodered.org/t/detect-if-temperature-is-rising-falling-or-is-stable/48462 "2021-07-16T07:06:20Z")

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Hello, I have made a display that shows the temprature inside my house however I would like to be able to see if the temperature is rising, falling or if it's stable. The temperature is sent to node-red through MQTT via …

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## [Integrate Sigfox with Node-red](https://discourse.nodered.org/t/integrate-sigfox-with-node-red/48448)

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**Author:** [@wael5300](https://discourse.nodered.org/u/wael5300)\
**Replies:** 8\
**Last updated:** [16 July 2021 06:30 UTC](https://discourse.nodered.org/t/integrate-sigfox-with-node-red/48448 "2021-07-16T06:30:14Z")

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Would you mind teaching me on How to Integrate Sigfox with Node-red ?

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## [Where in the NR code is the logic that generates the message ids?](https://discourse.nodered.org/t/where-in-the-nr-code-is-the-logic-that-generates-the-message-ids/48426)

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**Author:** [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\
**Replies:** 5\
**Last updated:** [16 July 2021 04:46 UTC](https://discourse.nodered.org/t/where-in-the-nr-code-is-the-logic-that-generates-the-message-ids/48426 "2021-07-16T04:46:46Z")

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Where in the NR code is the logic that generates the message ids? For example, af10dd8.1ca072. I want to mimic this format versus using typical uuid format in my python NR listener, so I can track each message in the l…

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## [Help configuring nodered+apache2 (create subdomain)](https://discourse.nodered.org/t/help-configuring-nodered-apache2-create-subdomain/48474)

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**Author:** [@adamalfath](https://discourse.nodered.org/u/adamalfath)\
**Replies:** 0\
**Last updated:** [16 July 2021 04:28 UTC](https://discourse.nodered.org/t/help-configuring-nodered-apache2-create-subdomain/48474 "2021-07-16T04:28:35Z")

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Hi, I've installed node-red in VPS with domain name mydomain.net, it's works normally under mydomain.net:1880. However I want to make the url it tidier by creating subdomain nodered.mydomain.net using apache2. Here's my …

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## [Connecting adafruit io to Blynk using Node-red](https://discourse.nodered.org/t/connecting-adafruit-io-to-blynk-using-node-red/48413)

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**Author:** [@wael5300](https://discourse.nodered.org/u/wael5300)\
**Replies:** 3\
**Last updated:** [15 July 2021 20:59 UTC](https://discourse.nodered.org/t/connecting-adafruit-io-to-blynk-using-node-red/48413 "2021-07-15T20:59:08Z")

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Would you mind helping me to connect/send data from Adafruit io to Blynk by Node-red ?

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## [Moving SD card from Pi3 to PiZero](https://discourse.nodered.org/t/moving-sd-card-from-pi3-to-pizero/2729)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 12\
**Last updated:** [15 July 2021 20:07 UTC](https://discourse.nodered.org/t/moving-sd-card-from-pi3-to-pizero/2729 "2021-07-15T20:07:12Z")

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I did all my development on a Pi3 and then stuck the card into a PiZero and got this pi@kitchencheer2:~/.node-red $ node-red Illegal instruction and then remembered you couldn't just do that as it needs sorting out to …

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## [Alarm dot com node?](https://discourse.nodered.org/t/alarm-dot-com-node/48461)

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**Author:** [@mattk](https://discourse.nodered.org/u/mattk)\
**Replies:** 1\
**Last updated:** [15 July 2021 20:07 UTC](https://discourse.nodered.org/t/alarm-dot-com-node/48461 "2021-07-15T20:07:08Z")

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Hi, anyone using the alarm dot com node here? I want to be able to see my alarm system status (not set, stay, away) but not sure how the node works. the configuration options are just username and password for alarm dot…

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## [Installation de noeuds](https://discourse.nodered.org/t/installation-de-noeuds/48371)

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**Author:** [@RECHERCHEINFOS](https://discourse.nodered.org/u/RECHERCHEINFOS)\
**Replies:** 6\
**Last updated:** [15 July 2021 12:28 UTC](https://discourse.nodered.org/t/installation-de-noeuds/48371 "2021-07-15T12:28:41Z")

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J'utilise node-red sur raspberry pi4. Je voudrais installer d'autres noeuds que les noeuds de base de node-red en utilisant "manage palette" et en indiquant le nom du noeud dans la ligne de recherche. En tapant sur "ins…

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## [Send txt file to Esp32?](https://discourse.nodered.org/t/send-txt-file-to-esp32/48425)

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**Author:** [@LuisPereira](https://discourse.nodered.org/u/LuisPereira)\
**Replies:** 5\
**Last updated:** [15 July 2021 11:10 UTC](https://discourse.nodered.org/t/send-txt-file-to-esp32/48425 "2021-07-15T11:10:46Z")

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Hi I need to receive some data in a ESP32, at the moment i have this data in a txt file in a SD card connected to the esp32, so everytime it reads the sd card it get the information it needs for the day, its like a set …

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## [Websocket with configurable address](https://discourse.nodered.org/t/websocket-with-configurable-address/48451)

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**Author:** [@najeem](https://discourse.nodered.org/u/najeem)\
**Replies:** 0\
**Last updated:** [15 July 2021 10:25 UTC](https://discourse.nodered.org/t/websocket-with-configurable-address/48451 "2021-07-15T10:25:36Z")

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Hi, I'm new to Node-Red and have been strugling with a limitation of websockets. I am using the websocket node as a client (connect instead of listen). I am able to send messages as well as recieve messages. However, I…

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## [Onewire sensors: read all out](https://discourse.nodered.org/t/onewire-sensors-read-all-out/48440)

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**Author:** [@binderth](https://discourse.nodered.org/u/binderth)\
**Replies:** 5\
**Last updated:** [15 July 2021 08:49 UTC](https://discourse.nodered.org/t/onewire-sensors-read-all-out/48440 "2021-07-15T08:49:13Z")

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I'd like to read out all my onewire sensors at once, but only get one? \[{"id":"d6d27eeb.c278a8","type":"inject","z":"97b191db.235b1","d":true,"name":"Temps","props":\[\],"repeat":"6","crontab":"","once":true,"onceDelay":0…

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## [Adding a delay to injections](https://discourse.nodered.org/t/adding-a-delay-to-injections/48439)

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**Author:** [@binderth](https://discourse.nodered.org/u/binderth)\
**Replies:** 8\
**Last updated:** [15 July 2021 08:46 UTC](https://discourse.nodered.org/t/adding-a-delay-to-injections/48439 "2021-07-15T08:46:50Z")

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I have a few sensors, I'd like to poll regularly, is there a recommended way to add a delay for that? e.g.: \[{"id":"f333eff6.397c1","type":"tab","label":"Flow 2","disabled":false,"info":""},{"id":"2c9cd50b.09aca2","typ…

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## [String delimited by comma to xlsx sheet seperated by column](https://discourse.nodered.org/t/string-delimited-by-comma-to-xlsx-sheet-seperated-by-column/48375)

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**Author:** [@Jonathan95](https://discourse.nodered.org/u/Jonathan95)\
**Replies:** 10\
**Last updated:** [15 July 2021 08:25 UTC](https://discourse.nodered.org/t/string-delimited-by-comma-to-xlsx-sheet-seperated-by-column/48375 "2021-07-15T08:25:03Z")

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Hi all, I am looking to try get a very long string of data into xlsx document. Up till recently id been downloading battery/inverter data manually for a load of worksites for my employer. last couple of weeks id manag…

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## [MQTT shows QoS 0 even if set to 1 or 2 on ActiveMQ](https://discourse.nodered.org/t/mqtt-shows-qos-0-even-if-set-to-1-or-2-on-activemq/48438)

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**Author:** [@mhechthz](https://discourse.nodered.org/u/mhechthz)\
**Replies:** 2\
**Last updated:** [15 July 2021 07:56 UTC](https://discourse.nodered.org/t/mqtt-shows-qos-0-even-if-set-to-1-or-2-on-activemq/48438 "2021-07-15T07:56:57Z")

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Hi, I have a MQTT node where I configured the QoS to 1 or 2. If I put a debug node after the MQTT node I get an output of qos=0. On the other end I have an ActiveMQ broker. It seems, that messages are lost! With a real…

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## [Ideas about solar production forecasting](https://discourse.nodered.org/t/ideas-about-solar-production-forecasting/48168)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 47\
**Last updated:** [13 July 2021 05:55 UTC](https://discourse.nodered.org/t/ideas-about-solar-production-forecasting/48168 "2021-07-13T05:55:42Z")

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Hi folks, HomeAssistant had a new release yesterday, and one of their new features is solar production forecasting (see here). Which is some of those things that immediately gets my attention ... It is based on the ht…

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## [INA219 node configuration](https://discourse.nodered.org/t/ina219-node-configuration/48368)

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**Author:** [@alexander77](https://discourse.nodered.org/u/alexander77)\
**Replies:** 6\
**Last updated:** [15 July 2021 05:21 UTC](https://discourse.nodered.org/t/ina219-node-configuration/48368 "2021-07-15T05:21:39Z")

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I use a board with 4 fixed wired INA's on board with fixed adresses. Unfortunately the INA219 node is configured to use 2 standard adresses an 2 other adresses, which first seemed to make the node useless, since the adr…

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## [Error sending message to iot hub (AMQP)](https://discourse.nodered.org/t/error-sending-message-to-iot-hub-amqp/48415)

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**Author:** [@MarioTorres](https://discourse.nodered.org/u/MarioTorres)\
**Replies:** 2\
**Last updated:** [15 July 2021 04:17 UTC](https://discourse.nodered.org/t/error-sending-message-to-iot-hub-amqp/48415 "2021-07-15T04:17:41Z")

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Good day. I am trying to send a message to iothub but I get this error. This was working fine until a few weeks ago. Do you know why it usually fails? How do i fix it?

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## [Node red+ raspberry pi\_push\_button+image classification](https://discourse.nodered.org/t/node-red-raspberry-pi-push-button-image-classification/48344)

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**Author:** [@MK1992](https://discourse.nodered.org/u/MK1992)\
**Replies:** 6\
**Last updated:** [15 July 2021 03:30 UTC](https://discourse.nodered.org/t/node-red-raspberry-pi-push-button-image-classification/48344 "2021-07-15T03:30:26Z")

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flows.json (3.0 KB) So once I press the button, it will capture image and classify the image based on the model. I have used the model that nodered already provides. But I think there is sth wrong from usbcamera port…

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## [Operate only once](https://discourse.nodered.org/t/operate-only-once/48405)

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**Author:** [@nightmare1](https://discourse.nodered.org/u/nightmare1)\
**Replies:** 7\
**Last updated:** [14 July 2021 23:19 UTC](https://discourse.nodered.org/t/operate-only-once/48405 "2021-07-14T23:19:44Z")

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I have a temperature sensor and a window opening i have it configured through the switch node as pictured below However it is switching an already Open, On every 3-4 minutes and i am woried this will burn out my relay …

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## [Choose Http Post node](https://discourse.nodered.org/t/choose-http-post-node/48382)

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**Author:** [@zamzon](https://discourse.nodered.org/u/zamzon)\
**Replies:** 4\
**Last updated:** [14 July 2021 19:29 UTC](https://discourse.nodered.org/t/choose-http-post-node/48382 "2021-07-14T19:29:57Z")

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Hi I need to make an HTTP POST call, but I'm not quite sure which node to use and where to put my information I need to make a POST call to http://ubisys-g1-2836/api/v1/devices/d9/e1/Light/OnOff/OnState/ Header value: …

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## [Noeud ModBus liaison RS485 et WP8028ADAM](https://discourse.nodered.org/t/noeud-modbus-liaison-rs485-et-wp8028adam/48311)

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**Author:** [@Sebastien](https://discourse.nodered.org/u/Sebastien)\
**Replies:** 11\
**Last updated:** [14 July 2021 19:24 UTC](https://discourse.nodered.org/t/noeud-modbus-liaison-rs485-et-wp8028adam/48311 "2021-07-14T19:24:37Z")

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Bonjour à vous, je commence avec node-red modbus ( noeud modbus ). le projet consiste à commander les sorties du module modbus WP2768ADAM en RS 486 ( rtu) avec un raspberry model B avec une carte GPIO RS 485 et avec nod…

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## ["Drop the flow here" bug](https://discourse.nodered.org/t/drop-the-flow-here-bug/48309)

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**Author:** [@GiovanniG](https://discourse.nodered.org/u/GiovanniG)\
**Replies:** 11\
**Last updated:** [14 July 2021 19:14 UTC](https://discourse.nodered.org/t/drop-the-flow-here-bug/48309 "2021-07-14T19:14:55Z")

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Hi, I'm doing a massive restyle of flow, sometimes when I was scrolling down I had this message, "Drop the flow here" , but it was easy to remove.. now it's not more possible. Since I've not deplouyed from 30 minutes, wi…

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## [Help with structuring if/then logic in NR](https://discourse.nodered.org/t/help-with-structuring-if-then-logic-in-nr/48408)

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**Author:** [@mobamoba](https://discourse.nodered.org/u/mobamoba)\
**Replies:** 7\
**Last updated:** [14 July 2021 17:17 UTC](https://discourse.nodered.org/t/help-with-structuring-if-then-logic-in-nr/48408 "2021-07-14T17:17:12Z")

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I'm very familiar with Node Red and have made lots of flows but for some reason my brain is tanking on constructing a particular flow and wanted to see if anyone had any idea how to construct it. Here's the issue and th…

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## [Setting JSON structure](https://discourse.nodered.org/t/setting-json-structure/48409)

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**Author:** [@ScheepersJohan](https://discourse.nodered.org/u/ScheepersJohan)\
**Replies:** 5\
**Last updated:** [14 July 2021 15:06 UTC](https://discourse.nodered.org/t/setting-json-structure/48409 "2021-07-14T15:06:13Z")

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Hi All, I am passing a JSON into two function nodes. The function nodes decode my msg.payload.payload\_raw, by first changing it to 'Base64' and and then decode. Decoder 1 let data = msg.payload.payload\_raw; let byte…

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## [Cant Cast local file](https://discourse.nodered.org/t/cant-cast-local-file/48404)

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**Author:** [@Essalsolami](https://discourse.nodered.org/u/Essalsolami)\
**Replies:** 4\
**Last updated:** [14 July 2021 13:49 UTC](https://discourse.nodered.org/t/cant-cast-local-file/48404 "2021-07-14T13:49:17Z")

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I have a png file that i would like to cast it on TV. I put the "car.png" file in this path C:\\Users\\ASUSE\\car.png, unfort i got this error "Not able to load media:Load failed Not able to load the media". Any help would…

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## [Riot-nodes error](https://discourse.nodered.org/t/riot-nodes-error/47239)

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**Author:** [@Martin10](https://discourse.nodered.org/u/Martin10)\
**Replies:** 165\
**Last updated:** [14 July 2021 13:21 UTC](https://discourse.nodered.org/t/riot-nodes-error/47239 "2021-07-14T13:21:12Z")

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Hi, did anyone try to run this project, because when i try to upload Packege.json i've got error: ''Input not a json array''. Any help?

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## [How to add msg.topic to function](https://discourse.nodered.org/t/how-to-add-msg-topic-to-function/48401)

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**Author:** [@edstobi](https://discourse.nodered.org/u/edstobi)\
**Replies:** 2\
**Last updated:** [14 July 2021 11:26 UTC](https://discourse.nodered.org/t/how-to-add-msg-topic-to-function/48401 "2021-07-14T11:26:08Z")

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Hi how do I add the msg.topic here. My attempts always end with the error message that the function tries to send a message of type string. so it works, but logically without msg.topic if(msg.payload =="on"){ msg…

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## [EMFILE Error with Influxdb](https://discourse.nodered.org/t/emfile-error-with-influxdb/8554)

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**Author:** [@gavraq](https://discourse.nodered.org/u/gavraq)\
**Replies:** 35\
**Last updated:** [14 July 2021 11:11 UTC](https://discourse.nodered.org/t/emfile-error-with-influxdb/8554 "2021-07-14T11:11:51Z")

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Hi I am trying to write some data to an influxdb database but I am getting an EMFILE error which I cant seem to understand. Does anyone have any ideas? Here is a screenshot of the relevant parts of my flows along with …

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