# Latest

**URL:** https://discourse.nodered.org/latest.md?page=773

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

**Page:** 774

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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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## [Sunscreen motor control](https://discourse.nodered.org/t/sunscreen-motor-control/48395)

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**Author:** [@Crebain](https://discourse.nodered.org/u/Crebain)\
**Replies:** 4\
**Last updated:** [15 July 2021 01:25 UTC](https://discourse.nodered.org/t/sunscreen-motor-control/48395 "2021-07-15T01:25:51Z")

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Hi everyone, I've just made my first Node Red sequence and I would love to get some tips/feedback on how I did and if my sequence is monkey proof (I got a 1 year old :slight\_smile:) So lets start with some explanation:…

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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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## [Refresh tab/page after using another tab](https://discourse.nodered.org/t/refresh-tab-page-after-using-another-tab/47912)

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**Author:** [@mune](https://discourse.nodered.org/u/mune)\
**Replies:** 6\
**Last updated:** [14 July 2021 21:09 UTC](https://discourse.nodered.org/t/refresh-tab-page-after-using-another-tab/47912 "2021-07-14T21:09:26Z")

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I move the working window to tabB, I change some global variables there, and then I go back to the main tabA, but the strings of the global variables are the old ones. How can I trigger tabA update when I go back from …

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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)

<div class="topic-metadata">

**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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## [Ui\_toast request - add second output](https://discourse.nodered.org/t/ui-toast-request-add-second-output/48423)

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**Author:** [@MyRandomThoughts](https://discourse.nodered.org/u/MyRandomThoughts)\
**Replies:** 0\
**Last updated:** [14 July 2021 18:56 UTC](https://discourse.nodered.org/t/ui-toast-request-add-second-output/48423 "2021-07-14T18:56:12Z")

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I presume that most people have a switch node directly following a ui\_toast (notification) node so that you can see which button a user clicked. Could this not be built into the node itself with just having 2 output con…

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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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## [Search UI: shows X/Y](https://discourse.nodered.org/t/search-ui-shows-x-y/48370)

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**Author:** [@Mannshoch](https://discourse.nodered.org/u/Mannshoch)\
**Replies:** 7\
**Last updated:** [14 July 2021 15:41 UTC](https://discourse.nodered.org/t/search-ui-shows-x-y/48370 "2021-07-14T15:41:38Z")

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I get periodical XY coordinates. I wish to have an image in the dashboard that shows me that points. (Optional draw a line to follow the history) A node should receive the coordinates and draw an Image that (optiona) au…

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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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## [Fill dropdown by function node](https://discourse.nodered.org/t/fill-dropdown-by-function-node/48407)

<div class="topic-metadata">

**Author:** [@protonmw](https://discourse.nodered.org/u/protonmw)\
**Replies:** 2\
**Last updated:** [14 July 2021 13:40 UTC](https://discourse.nodered.org/t/fill-dropdown-by-function-node/48407 "2021-07-14T13:40:08Z")

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Hello experts! I'm trying to fill a dropdown but cant get it work! Whats wrong with my code? var msg2 = {}; msg2.options = \[\]; for (let i=0; i\<msg.payload.length; i++) { var label = msg.payload\[i\].Timestamp\_\_Orde…

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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)

<div class="topic-metadata">

**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)

<div class="topic-metadata">

**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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## [How to connect to Node red?](https://discourse.nodered.org/t/how-to-connect-to-node-red/48341)

<div class="topic-metadata">

**Author:** [@jlian168](https://discourse.nodered.org/u/jlian168)\
**Replies:** 6\
**Last updated:** [14 July 2021 09:57 UTC](https://discourse.nodered.org/t/how-to-connect-to-node-red/48341 "2021-07-14T09:57:28Z")

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Dear All : After I clean chrome history and cookie...That cant connect to 127.0.0.1:1883 but dos command is show 127.0.0.1:1883 What happened? Thank u.

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## [Remove/Disable Delete button of node](https://discourse.nodered.org/t/remove-disable-delete-button-of-node/48391)

<div class="topic-metadata">

**Author:** [@chiche](https://discourse.nodered.org/u/chiche)\
**Replies:** 5\
**Last updated:** [14 July 2021 08:58 UTC](https://discourse.nodered.org/t/remove-disable-delete-button-of-node/48391 "2021-07-14T08:58:02Z")

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Can I disable or remove the \[delete\] button of the mine node?

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## [Value wrong interpreted](https://discourse.nodered.org/t/value-wrong-interpreted/48345)

<div class="topic-metadata">

**Author:** [@digidax](https://discourse.nodered.org/u/digidax)\
**Replies:** 12\
**Last updated:** [14 July 2021 08:27 UTC](https://discourse.nodered.org/t/value-wrong-interpreted/48345 "2021-07-14T08:27:46Z")

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Hi, I use a simple function: if (msg.payload \< 300) { msg.payload = 3 } else { // nothing } if (msg.payload \> 500) { msg.payload = 0 } I have monitored the value of the msg.payload: The higher graph is the …

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## [How to use the node prometheus](https://discourse.nodered.org/t/how-to-use-the-node-prometheus/48390)

<div class="topic-metadata">

**Author:** [@lei1](https://discourse.nodered.org/u/lei1)\
**Replies:** 0\
**Last updated:** [14 July 2021 08:17 UTC](https://discourse.nodered.org/t/how-to-use-the-node-prometheus/48390 "2021-07-14T08:17:26Z")

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I used an http request to get the data fetched by node-exporter and then imported it into this prometheus node, but I don't know how to use this node, and I can't get started after checking the documentation

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## [RPi4 - Modbus performance question](https://discourse.nodered.org/t/rpi4-modbus-performance-question/47316)

<div class="topic-metadata">

**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 5\
**Last updated:** [14 July 2021 06:54 UTC](https://discourse.nodered.org/t/rpi4-modbus-performance-question/47316 "2021-07-14T06:54:42Z")

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Hey Guys, I am about to get some new solar inverters and one of things that they want is to have their own 3 phase energy meters (each of them so i will end up with 3 x 3 phase meters) Someone has hacked the modbus pro…

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