# General **URL:** https://discourse.nodered.org/c/general/7.md?page=376 [Latest](https://discourse.nodered.org/latest.md) · [Categories](https://discourse.nodered.org/categories.md) · [Tags](https://discourse.nodered.org/tags.md) **Page:** 377 --- ## [Applying a setpoint curve](https://discourse.nodered.org/t/applying-a-setpoint-curve/62708)
**Author:** [@SeRiusRod](https://discourse.nodered.org/u/SeRiusRod)\ **Replies:** 0\ **Last updated:** [16 May 2022 18:03 UTC](https://discourse.nodered.org/t/applying-a-setpoint-curve/62708 "2022-05-16T18:03:32Z")
I'm writing because perhaps someone knows a better way of implementing setpoint curves based on a known value. Basically what I'm calculating there is the charging power for a battery on a SoC value based on certain cond… --- ## [How to display newest picture on dashboard or show the 5 images changed every 30s in dashboard?](https://discourse.nodered.org/t/how-to-display-newest-picture-on-dashboard-or-show-the-5-images-changed-every-30s-in-dashboard/62706)
**Author:** [@tai34126](https://discourse.nodered.org/u/tai34126)\ **Replies:** 0\ **Last updated:** [16 May 2022 17:03 UTC](https://discourse.nodered.org/t/how-to-display-newest-picture-on-dashboard-or-show-the-5-images-changed-every-30s-in-dashboard/62706 "2022-05-16T17:03:29Z")
Hello everyone. I'm a newbie in Node-Red but I would use the Node-Red to do my Thesis. I want to make a system simulation on node-red. I want to display the newest picture on a dashboard, when I click something the node… --- ## [Download file by using HTML link](https://discourse.nodered.org/t/download-file-by-using-html-link/62580)
**Author:** [@QGIO](https://discourse.nodered.org/u/QGIO)\ **Replies:** 6\ **Last updated:** [16 May 2022 14:27 UTC](https://discourse.nodered.org/t/download-file-by-using-html-link/62580 "2022-05-16T14:27:56Z")
I'm trying to download a file by a link in a table. The resulting table is like this: I set the path in the table template, and added the 'name' of the attachement coming from an SQL table. Here my flow: \[{"id":"0df… --- ## [Set http.globalAgent.maxSockets](https://discourse.nodered.org/t/set-http-globalagent-maxsockets/62697)
**Author:** [@barissecen](https://discourse.nodered.org/u/barissecen)\ **Replies:** 0\ **Last updated:** [16 May 2022 13:52 UTC](https://discourse.nodered.org/t/set-http-globalagent-maxsockets/62697 "2022-05-16T13:52:10Z")
We are encountering an issue when we are doing a lot of requests using HTTP Request. As a solution, some people recommend to put http.globalAgent.maxSockets=100; paramater to seetings.js but when we put like this we are … --- ## [Which smart plugs (or smart tags) to use to monitor 10 devices' uptimes](https://discourse.nodered.org/t/which-smart-plugs-or-smart-tags-to-use-to-monitor-10-devices-uptimes/62169)
**Author:** [@PaulKana](https://discourse.nodered.org/u/PaulKana)\ **Replies:** 13\ **Last updated:** [16 May 2022 12:30 UTC](https://discourse.nodered.org/t/which-smart-plugs-or-smart-tags-to-use-to-monitor-10-devices-uptimes/62169 "2022-05-16T12:30:57Z")
Hi, I have a small factory type setup with 10 extractors. They are basically heating elements. Right now I have each socket wired to a timer in a wall-box. Not relevant but each socket has it's own circuit breaker. Som… --- ## [Extracting my content value from a msg.payload?](https://discourse.nodered.org/t/extracting-my-content-value-from-a-msg-payload/60182)
**Author:** [@dheeju1314](https://discourse.nodered.org/u/dheeju1314)\ **Replies:** 18\ **Last updated:** [16 May 2022 12:02 UTC](https://discourse.nodered.org/t/extracting-my-content-value-from-a-msg-payload/60182 "2022-05-16T12:02:18Z")
Am using https request to populate the msg.payload using split node but i want to push the data to MYSQL database before the i am having the error ref screenshot to separate my payload json string to difference output… --- ## [Guaranteed delivery & MS SQL plus](https://discourse.nodered.org/t/guaranteed-delivery-ms-sql-plus/62685)
**Author:** [@crashoverhead](https://discourse.nodered.org/u/crashoverhead)\ **Replies:** 2\ **Last updated:** [16 May 2022 11:37 UTC](https://discourse.nodered.org/t/guaranteed-delivery-ms-sql-plus/62685 "2022-05-16T11:37:08Z")
Hi all , my flow read data from an energy meter and insert it a MS SQL server, it work fine but i want add the Guaranteed delivery to avoid data loss. I tryed to configure i dont understand how i need to configure with… --- ## [API call not working as expected](https://discourse.nodered.org/t/api-call-not-working-as-expected/62680)
**Author:** [@NeetaJ](https://discourse.nodered.org/u/NeetaJ)\ **Replies:** 3\ **Last updated:** [16 May 2022 11:07 UTC](https://discourse.nodered.org/t/api-call-not-working-as-expected/62680 "2022-05-16T11:07:05Z")
Hi, I a trying to call an api from the front end but i dont get the expected result. This is frontend \
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\<… --- ## [Converting Object to Array](https://discourse.nodered.org/t/converting-object-to-array/62669)
**Author:** [@devittobk](https://discourse.nodered.org/u/devittobk)\ **Replies:** 4\ **Last updated:** [16 May 2022 10:37 UTC](https://discourse.nodered.org/t/converting-object-to-array/62669 "2022-05-16T10:37:24Z")
Hi, I have a msg.payload: Object as shown below: I would like to convert it to an array with the following format: Any ideas on how to achieve this? I was thinking of a function node, but do not know where to sta… --- ## [How to Ignore Unconnected Slave in RS485 MODBUS RTU](https://discourse.nodered.org/t/how-to-ignore-unconnected-slave-in-rs485-modbus-rtu/62678)
**Author:** [@haeWoozu](https://discourse.nodered.org/u/haeWoozu)\ **Replies:** 0\ **Last updated:** [16 May 2022 08:22 UTC](https://discourse.nodered.org/t/how-to-ignore-unconnected-slave-in-rs485-modbus-rtu/62678 "2022-05-16T08:22:20Z")
8CH devices are connected to one port and each device has a different Unit-Id. Is there any way to ignore the error when the Slave equipment is not connected? --- ## [Error connecting UPC UA with node](https://discourse.nodered.org/t/error-connecting-upc-ua-with-node/62573)
**Author:** [@lucka](https://discourse.nodered.org/u/lucka)\ **Replies:** 23\ **Last updated:** [16 May 2022 07:42 UTC](https://discourse.nodered.org/t/error-connecting-upc-ua-with-node/62573 "2022-05-16T07:42:30Z")
i have this problem when i conect the node with UAExpert I get this msgs and after few time I get this --- ## [Raspyberry pi act as a websocekt](https://discourse.nodered.org/t/raspyberry-pi-act-as-a-websocekt/62672)
**Author:** [@Manuel\_o](https://discourse.nodered.org/u/Manuel_o)\ **Replies:** 1\ **Last updated:** [16 May 2022 07:40 UTC](https://discourse.nodered.org/t/raspyberry-pi-act-as-a-websocekt/62672 "2022-05-16T07:40:10Z")
Hello friends. In my project i get data from a PLC. A friend of mine is working with me on this project. He is doing the webdev.-stuff. He said he has done his part and set up a cloud, a login etc and that he now needs … --- ## [Creating local node red instance](https://discourse.nodered.org/t/creating-local-node-red-instance/62668)
**Author:** [@atmar](https://discourse.nodered.org/u/atmar)\ **Replies:** 3\ **Last updated:** [16 May 2022 07:35 UTC](https://discourse.nodered.org/t/creating-local-node-red-instance/62668 "2022-05-16T07:35:06Z")
how should I create local node red instance in below 'apiCall' request? also I want global instance of created node red instance to be running in the background. var http = require('http'); var express = require("expres… --- ## [Switch Nodes,, MQTT and Strings](https://discourse.nodered.org/t/switch-nodes-mqtt-and-strings/62666)
**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\ **Replies:** 1\ **Last updated:** [16 May 2022 06:52 UTC](https://discourse.nodered.org/t/switch-nodes-mqtt-and-strings/62666 "2022-05-16T06:52:22Z")
Guys, I have an MQTT message coming in that contains temperature information - this is being sent across from Home Assistant to me. It is showing in the debug window as a String of 4 characters (e.g. 23.4) and hence do… --- ## [Populate Data from Database into UI Dropdown](https://discourse.nodered.org/t/populate-data-from-database-into-ui-dropdown/62647)
**Author:** [@devittobk](https://discourse.nodered.org/u/devittobk)\ **Replies:** 4\ **Last updated:** [16 May 2022 06:34 UTC](https://discourse.nodered.org/t/populate-data-from-database-into-ui-dropdown/62647 "2022-05-16T06:34:58Z")
Hello! I am just getting started with Node-RED and Node-RED Dashboard and wondering whether it is possible to populate the UI Dropdown with data retrieved from Google Firebase. Below is my very simple flow using just a… --- ## [Can node-red generate a webserver](https://discourse.nodered.org/t/can-node-red-generate-a-webserver/62560)
**Author:** [@Manuel\_o](https://discourse.nodered.org/u/Manuel_o)\ **Replies:** 9\ **Last updated:** [16 May 2022 06:04 UTC](https://discourse.nodered.org/t/can-node-red-generate-a-webserver/62560 "2022-05-16T06:04:31Z")
Sorry if the topic is misleading. I dont know how to formulate it correct. My idea: I have a raspy with a Sim in it. I know how to create a local dashboard with node-red I want to read a temerpature and if the temperat… --- ## [Problem with reading Change\_State\_Time with node-red-contrib-bacnet](https://discourse.nodered.org/t/problem-with-reading-change-state-time-with-node-red-contrib-bacnet/62670)
**Author:** [@asad-123](https://discourse.nodered.org/u/asad-123)\ **Replies:** 0\ **Last updated:** [16 May 2022 06:11 UTC](https://discourse.nodered.org/t/problem-with-reading-change-state-time-with-node-red-contrib-bacnet/62670 "2022-05-16T06:11:04Z")
I'm submitting a issue regarding Bacnet reading node, when I try to read Change\_State\_Time I do get values which are incorrect, I can see the correct values in YABE and our EBO software but I don't get correct values whe… --- ## [Automation sequence from a file](https://discourse.nodered.org/t/automation-sequence-from-a-file/62657)
**Author:** [@sjamesparsonsjr](https://discourse.nodered.org/u/sjamesparsonsjr)\ **Replies:** 0\ **Last updated:** [15 May 2022 21:24 UTC](https://discourse.nodered.org/t/automation-sequence-from-a-file/62657 "2022-05-15T21:24:56Z")
Hello Node-Red community, I'm looking for some advice. I've created something similar to a 3D printer with 4 steppers, 4 end stops 16 fluid valves and a few i2c devices. I want anyone who uses this device to generate t… --- ## [JSON formatting from new Shelly Devices via. MQTT](https://discourse.nodered.org/t/json-formatting-from-new-shelly-devices-via-mqtt/62612)
**Author:** [@nobbyneb](https://discourse.nodered.org/u/nobbyneb)\ **Replies:** 3\ **Last updated:** [15 May 2022 21:18 UTC](https://discourse.nodered.org/t/json-formatting-from-new-shelly-devices-via-mqtt/62612 "2022-05-15T21:18:02Z")
Hi everybody, I'm new to Node-RED and having some difficulty reformatting JSON outputted from the new series of Shelly Plus devices via MQTT. I am receiving messages from Shelly OK but Node-RED appears to be getting in… --- ## ["Jump" to target of LinkCall node?](https://discourse.nodered.org/t/jump-to-target-of-linkcall-node/62655)
**Author:** [@ralphwetzel](https://discourse.nodered.org/u/ralphwetzel)\ **Replies:** 0\ **Last updated:** [15 May 2022 20:52 UTC](https://discourse.nodered.org/t/jump-to-target-of-linkcall-node/62655 "2022-05-15T20:52:08Z")
Hi! Is there a magic SpecialKey + DblClick on node combo established that allows to jump to the call target of a LinkCall node (if it is defined)? If not, is there a community interest in such a feature? --- ## [Worldmap Great Circle Lines Issue](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820)
**Author:** [@aa0z](https://discourse.nodered.org/u/aa0z)\ **Replies:** 13\ **Last updated:** [15 May 2022 18:04 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820 "2022-05-15T18:04:10Z")
I'm having a small issue with great circle lines. I don't think it's to look like that. :slight\_smile: Here is the payload. Thanks Kyle --- ## [Node-red-contrib-sma-webconnect custom values reading](https://discourse.nodered.org/t/node-red-contrib-sma-webconnect-custom-values-reading/62652)
**Author:** [@Hyuggs](https://discourse.nodered.org/u/Hyuggs)\ **Replies:** 0\ **Last updated:** [15 May 2022 17:14 UTC](https://discourse.nodered.org/t/node-red-contrib-sma-webconnect-custom-values-reading/62652 "2022-05-15T17:14:32Z")
Hello, Does someone can explain me how to send an input payload to the sma-webconnect node? I'm able to connect to my Sunny boy 3.0 but the only parameter I can retrieve is the output power. This is normal because Trip… --- ## [Storing and retrieving data from input text](https://discourse.nodered.org/t/storing-and-retrieving-data-from-input-text/62650)
**Author:** [@alexback](https://discourse.nodered.org/u/alexback)\ **Replies:** 0\ **Last updated:** [15 May 2022 16:09 UTC](https://discourse.nodered.org/t/storing-and-retrieving-data-from-input-text/62650 "2022-05-15T16:09:21Z")
Hey, I combined 4 inputs with this configuration in text input with button and join. How can I strore and retrieve the number I enter while it's string.test? --- ## [Unknown node types: googleCredentials](https://discourse.nodered.org/t/unknown-node-types-googlecredentials/62648)
**Author:** [@ncherry](https://discourse.nodered.org/u/ncherry)\ **Replies:** 2\ **Last updated:** [15 May 2022 15:07 UTC](https://discourse.nodered.org/t/unknown-node-types-googlecredentials/62648 "2022-05-15T15:07:50Z")
I've gotten a bit sidewards at the moment as I deleted node-red-contrib-google-oauth-calendar and suddenly I got complaints about googleCredentials. I've added node-red-contrib-google-oauth-calendar back in but I contin… --- ## [How to make a button that send msg once on click and sends msg repeated at set interval on button hold?](https://discourse.nodered.org/t/how-to-make-a-button-that-send-msg-once-on-click-and-sends-msg-repeated-at-set-interval-on-button-hold/62614)
**Author:** [@vk4tux](https://discourse.nodered.org/u/vk4tux)\ **Replies:** 6\ **Last updated:** [15 May 2022 13:40 UTC](https://discourse.nodered.org/t/how-to-make-a-button-that-send-msg-once-on-click-and-sends-msg-repeated-at-set-interval-on-button-hold/62614 "2022-05-15T13:40:25Z")
At the moment I have two basic buttons. One sends 'G DOWN 0' on click, the other sends 'G UP 0" on click, to a tcp request. This works well, however I need a fast tune ability to hold button and send repeatedly for a scr… --- ## [Asterisk AMI question](https://discourse.nodered.org/t/asterisk-ami-question/60664)
**Author:** [@BigFunnyGiant](https://discourse.nodered.org/u/BigFunnyGiant)\ **Replies:** 1\ **Last updated:** [15 May 2022 12:45 UTC](https://discourse.nodered.org/t/asterisk-ami-question/60664 "2022-05-15T12:45:23Z")
I would like to make an API call when an Asterisk AMI Event happens. I discovered Node RED can do this with the AMI node, so I’m trying to set it up. I’m not sure it’s working. It was suggested to me by some other Asteri… --- ## [Inserting data with timestamp in MongoDB](https://discourse.nodered.org/t/inserting-data-with-timestamp-in-mongodb/62618)
**Author:** [@e-Duardo](https://discourse.nodered.org/u/e-Duardo)\ **Replies:** 1\ **Last updated:** [15 May 2022 12:33 UTC](https://discourse.nodered.org/t/inserting-data-with-timestamp-in-mongodb/62618 "2022-05-15T12:33:11Z")
Hi all, I am trying to learn the basics of MongoDB to insert some process data from a PLC so that another application of a partner uses this data in realtime. I would use Node-RED to read the data from the Siemens PLC… --- ## [ I don't understand where is the mistake](https://discourse.nodered.org/t/i-dont-understand-where-is-the-mistake/62642)
**Author:** [@JJ22](https://discourse.nodered.org/u/JJ22)\ **Replies:** 2\ **Last updated:** [15 May 2022 11:06 UTC](https://discourse.nodered.org/t/i-dont-understand-where-is-the-mistake/62642 "2022-05-15T11:06:41Z")
Hello! I am still new to javascript. I need to create a code for the equipment selection configurator (calculator) so that instead of a number (answer) it gives a link to the site. Started simple, here is my code: U=m… --- ## [Extracting ID3 Tags out of an Audio stream](https://discourse.nodered.org/t/extracting-id3-tags-out-of-an-audio-stream/62570)
**Author:** [@onkel\_joerg](https://discourse.nodered.org/u/onkel_joerg)\ **Replies:** 8\ **Last updated:** [15 May 2022 07:36 UTC](https://discourse.nodered.org/t/extracting-id3-tags-out-of-an-audio-stream/62570 "2022-05-15T07:36:35Z")
Hello all Is there a way to extract the Artist and Album information out of an internet audiostream? --- ## [Purpose of Unknown Node as part of core nodes in standard installation](https://discourse.nodered.org/t/purpose-of-unknown-node-as-part-of-core-nodes-in-standard-installation/62635)
**Author:** [@mickym2](https://discourse.nodered.org/u/mickym2)\ **Replies:** 2\ **Last updated:** [15 May 2022 07:18 UTC](https://discourse.nodered.org/t/purpose-of-unknown-node-as-part-of-core-nodes-in-standard-installation/62635 "2022-05-15T07:18:06Z")
Can someone explain to me what the purpose of those unknow nodes in the core nodes is? It seems that it is really part of the core nodes. if you look into the code - it looks like an empty template - but nothin… [Previous page](https://discourse.nodered.org/c/general/7.md?page=375) [Next page](https://discourse.nodered.org/c/general/7.md?page=377)