# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=716

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

**Page:** 717

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## [Node-red-contrib-cache help](https://discourse.nodered.org/t/node-red-contrib-cache-help/29940)

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**Author:** [@martynwheeler](https://discourse.nodered.org/u/martynwheeler)\
**Replies:** 5\
**Last updated:** [12 July 2020 13:35 UTC](https://discourse.nodered.org/t/node-red-contrib-cache-help/29940 "2020-07-12T13:35:43Z")

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Hi, Is anyone using node-red-contrib-cache with uibuilder. It looks great but I am not sure whether I am doing things the best way. I have read through the section on the wiki and it says: "Simply send the control me…

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## [Serial Port Node not outputting data](https://discourse.nodered.org/t/serial-port-node-not-outputting-data/29909)

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**Author:** [@Meptik](https://discourse.nodered.org/u/Meptik)\
**Replies:** 3\
**Last updated:** [12 July 2020 12:45 UTC](https://discourse.nodered.org/t/serial-port-node-not-outputting-data/29909 "2020-07-12T12:45:42Z")

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Hello! TLDR: The Serial node is connected, but not outputting any data. I've got NR V1.1.1 tuning on a Pi2, and a USB/Serial Barcode scanner plugged in. The USB-serial device is plugged in, connected, and showing data o…

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## [Https://flows.nodered.org/node/node-red-contrib-machine-learning](https://discourse.nodered.org/t/https-flows-nodered-org-node-node-red-contrib-machine-learning/29945)

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**Author:** [@BNMEZR](https://discourse.nodered.org/u/BNMEZR)\
**Replies:** 0\
**Last updated:** [12 July 2020 11:18 UTC](https://discourse.nodered.org/t/https-flows-nodered-org-node-node-red-contrib-machine-learning/29945 "2020-07-12T11:18:22Z")

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how to load json file in node-red-contrib-machine-learning ?

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## [Missing flows on node-red server](https://discourse.nodered.org/t/missing-flows-on-node-red-server/29846)

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**Author:** [@eddy23](https://discourse.nodered.org/u/eddy23)\
**Replies:** 17\
**Last updated:** [12 July 2020 08:40 UTC](https://discourse.nodered.org/t/missing-flows-on-node-red-server/29846 "2020-07-12T08:40:40Z")

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My node-red server was suddenly disconnected and when i restarted the node-red server, my flows are gone. I desperately need some guidance to retrieve whatever I have done on my node-red previously.

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## [Nodered and ewpe-smart-mqtt](https://discourse.nodered.org/t/nodered-and-ewpe-smart-mqtt/29828)

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**Author:** [@MAaron](https://discourse.nodered.org/u/MAaron)\
**Replies:** 20\
**Last updated:** [12 July 2020 08:39 UTC](https://discourse.nodered.org/t/nodered-and-ewpe-smart-mqtt/29828 "2020-07-12T08:39:36Z")

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Hi there! Very noob question, I'm trying to use my air conditioner with MQTT broker in nodered, but have no idea how to configure it to just send a setting. According to the readme, I need to address a topic, in mqtt…

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## [Mysql, mariadb INSERT fail - "msg.payload should be an object containing the query arguments."](https://discourse.nodered.org/t/mysql-mariadb-insert-fail-msg-payload-should-be-an-object-containing-the-query-arguments/29905)

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**Author:** [@Adao\_Branco](https://discourse.nodered.org/u/Adao_Branco)\
**Replies:** 3\
**Last updated:** [12 July 2020 08:28 UTC](https://discourse.nodered.org/t/mysql-mariadb-insert-fail-msg-payload-should-be-an-object-containing-the-query-arguments/29905 "2020-07-12T08:28:14Z")

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I try insert data do mysql, but give this error : "msg.payload should be an object containing the query arguments." If I inject manual ; INSERT INTO consumo ( data, hora, voltagem, corrente, potencia, pf, kwh ) VALUES (…

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## [Worldmap ui not working](https://discourse.nodered.org/t/worldmap-ui-not-working/29904)

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**Author:** [@mshaz](https://discourse.nodered.org/u/mshaz)\
**Replies:** 9\
**Last updated:** [12 July 2020 07:44 UTC](https://discourse.nodered.org/t/worldmap-ui-not-working/29904 "2020-07-12T07:44:22Z")

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Hi I can't seem to toggle the ui\_worldmap on.By default after installation it is off. Can anyone help me?

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## [What does node red use for its scheduling on timing intervals?](https://discourse.nodered.org/t/what-does-node-red-use-for-its-scheduling-on-timing-intervals/29815)

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**Author:** [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\
**Replies:** 10\
**Last updated:** [12 July 2020 07:11 UTC](https://discourse.nodered.org/t/what-does-node-red-use-for-its-scheduling-on-timing-intervals/29815 "2020-07-12T07:11:39Z")

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What does node red use for its scheduling on timing intervals? Does it use cron or its own internal methodology? I have a flow that I would like to run as consistently as possible on multiple systems, such that it runs…

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## [Running node-RED as root](https://discourse.nodered.org/t/running-node-red-as-root/29889)

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**Author:** [@Rog\_Red](https://discourse.nodered.org/u/Rog_Red)\
**Replies:** 6\
**Last updated:** [12 July 2020 00:26 UTC](https://discourse.nodered.org/t/running-node-red-as-root/29889 "2020-07-12T00:26:25Z")

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Hi All, I want to run Node RED as root (only using this in my local network) on my raspberry pi so that I can use 'node-red-contrib-amazon-echo' so I need to allow access to port 80. If I 'sudo su node-red start', I ge…

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## [Setting up/Configuring Node Red to connect to Raspberry pi 4 via ethernet cable on a mac](https://discourse.nodered.org/t/setting-up-configuring-node-red-to-connect-to-raspberry-pi-4-via-ethernet-cable-on-a-mac/29912)

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**Author:** [@Rey272](https://discourse.nodered.org/u/Rey272)\
**Replies:** 5\
**Last updated:** [11 July 2020 21:34 UTC](https://discourse.nodered.org/t/setting-up-configuring-node-red-to-connect-to-raspberry-pi-4-via-ethernet-cable-on-a-mac/29912 "2020-07-11T21:34:04Z")

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Hello, I am working on a school project in which I would like to use Node Red and its editor to configure operation of a tv settings which will be connected to a Raspberry pi 4 model. I recently downloaded and installed …

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## [WebSocket Node multiple clients](https://discourse.nodered.org/t/websocket-node-multiple-clients/29917)

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**Author:** [@wahibmichael](https://discourse.nodered.org/u/wahibmichael)\
**Replies:** 4\
**Last updated:** [12 July 2020 00:03 UTC](https://discourse.nodered.org/t/websocket-node-multiple-clients/29917 "2020-07-12T00:03:44Z")

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Hello, if 2 clients are connected to same webscoket node, is there a way send a message to specific client instead of broadcasting the message to all connected clients? in another way I have 2 or more clients connected…

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## [How do you do versioning on flows?](https://discourse.nodered.org/t/how-do-you-do-versioning-on-flows/29860)

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**Author:** [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\
**Replies:** 3\
**Last updated:** [11 July 2020 23:44 UTC](https://discourse.nodered.org/t/how-do-you-do-versioning-on-flows/29860 "2020-07-11T23:44:52Z")

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How do you do versioning on or for flows? I change the name of the flow table, Flow 1.0, 1.1, 1.2, etc. Also add a comment node, with the name the same as the flow name as noted above. Is there some native method? So…

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## [OPC UA: I can't read variable assigned](https://discourse.nodered.org/t/opc-ua-i-cant-read-variable-assigned/29926)

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**Author:** [@abedgarr](https://discourse.nodered.org/u/abedgarr)\
**Replies:** 0\
**Last updated:** [11 July 2020 23:31 UTC](https://discourse.nodered.org/t/opc-ua-i-cant-read-variable-assigned/29926 "2020-07-11T23:31:50Z")

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\_I am doing an opc ua communication test for node red and matlab, I can read the assigned data with the predefined nodes of opc\_ua, but I cannot read them when I put the inject node. Can you help me please. \[{"id":"689…

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## [Is there at way to send data from Sim800L to NodeRed?](https://discourse.nodered.org/t/is-there-at-way-to-send-data-from-sim800l-to-nodered/29907)

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**Author:** [@netrux](https://discourse.nodered.org/u/netrux)\
**Replies:** 0\
**Last updated:** [11 July 2020 18:09 UTC](https://discourse.nodered.org/t/is-there-at-way-to-send-data-from-sim800l-to-nodered/29907 "2020-07-11T18:09:21Z")

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I want to send data through SIM800L using arduino, but I am not able to post HTTP request. Is there a way how we can replicate the request made in browser for arduino? I am trying AT+HTTPPARA="URL","http://user@MyIpAdd…

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## [Cannot get / (HA addon)](https://discourse.nodered.org/t/cannot-get-ha-addon/29897)

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**Author:** [@Razio](https://discourse.nodered.org/u/Razio)\
**Replies:** 0\
**Last updated:** [11 July 2020 13:09 UTC](https://discourse.nodered.org/t/cannot-get-ha-addon/29897 "2020-07-11T13:09:50Z")

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Hi, I installed node-red as an addon in home assistant. I am using it as a dashboard (getting my info through mqtt(homey)) I noticed today that I could not reach node red anymore (via the HA panel). The dashboard itse…

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## [Problem with a relay control](https://discourse.nodered.org/t/problem-with-a-relay-control/29892)

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**Author:** [@user7](https://discourse.nodered.org/u/user7)\
**Replies:** 5\
**Last updated:** [11 July 2020 14:06 UTC](https://discourse.nodered.org/t/problem-with-a-relay-control/29892 "2020-07-11T14:06:50Z")

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I have D1 mini, running esp easy and a relay which drivers a 12V fan with mqtt commands. Everything was working fine, untill I added sharp dust sensor. I have problems now, with the relay triggering automaticly on after…

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## [Creating a new node: how do I access the attributes?](https://discourse.nodered.org/t/creating-a-new-node-how-do-i-access-the-attributes/29896)

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**Author:** [@vp2021](https://discourse.nodered.org/u/vp2021)\
**Replies:** 1\
**Last updated:** [11 July 2020 13:26 UTC](https://discourse.nodered.org/t/creating-a-new-node-how-do-i-access-the-attributes/29896 "2020-07-11T13:26:52Z")

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Hello, I'm starting in the creation of nodes for Node-RED. I'd like to create a "simple" node that will take several parameters in its configuration window, and return a concatenation of these parameters... I was able …

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## [Cant find my on custom node module after install on raspberry pi](https://discourse.nodered.org/t/cant-find-my-on-custom-node-module-after-install-on-raspberry-pi/29893)

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**Author:** [@zuhaib446](https://discourse.nodered.org/u/zuhaib446)\
**Replies:** 12\
**Last updated:** [11 July 2020 13:13 UTC](https://discourse.nodered.org/t/cant-find-my-on-custom-node-module-after-install-on-raspberry-pi/29893 "2020-07-11T13:13:42Z")

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cant see module when I install it I have the same costume node module in windows it shows there when I install on the same module on raspberry pi it cant find there 1 Jul 12:19:48 - \[info\] Node-RED version: v1.1.2 11 …

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## [Store twitter data into DB2](https://discourse.nodered.org/t/store-twitter-data-into-db2/29891)

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**Author:** [@jahnavi\_30](https://discourse.nodered.org/u/jahnavi_30)\
**Replies:** 5\
**Last updated:** [11 July 2020 13:05 UTC](https://discourse.nodered.org/t/store-twitter-data-into-db2/29891 "2020-07-11T13:05:16Z")

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Hello Team, I'm working with Twitter Sentiment Analysis using Node-RED. Have to collect the streaming twitter data into a DB2(dashDB) database. Could someone help me out with this. Thank you.

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## [Timestamp value change while insert and select from mariadb](https://discourse.nodered.org/t/timestamp-value-change-while-insert-and-select-from-mariadb/3274)

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**Author:** [@tramanah](https://discourse.nodered.org/u/tramanah)\
**Replies:** 8\
**Last updated:** [11 July 2020 08:37 UTC](https://discourse.nodered.org/t/timestamp-value-change-while-insert-and-select-from-mariadb/3274 "2020-07-11T08:37:24Z")

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INSERT 9/20/2018, 12:40:24 AMnode: 4dd4086a.fba828INSERT INTO mytab (DeviceId,Line,outPIN,count,Time) VALUES (?,?,?,?,?) : msg.payload : array\[5\] \[ 2, 1, 7, 1, "2018-09-20 00:40:24" \] SELECT 9/20/2018, 12:40:36 AMnod…

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## [Serial port install/update problem](https://discourse.nodered.org/t/serial-port-install-update-problem/29821)

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**Author:** [@arpit8851](https://discourse.nodered.org/u/arpit8851)\
**Replies:** 4\
**Last updated:** [11 July 2020 06:26 UTC](https://discourse.nodered.org/t/serial-port-install-update-problem/29821 "2020-07-11T06:26:12Z")

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i want to update serial port in node red but its shown an error can anyone help me { ?2020-07-10T05:49:46.488Z Install : node-red-node-serialport 0.10.3 2020-07-10T05:49:46.500Z npm.cmd install --no-audit --no-update-…

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## [UDP Freeze data](https://discourse.nodered.org/t/udp-freeze-data/29882)

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**Author:** [@abedgarr](https://discourse.nodered.org/u/abedgarr)\
**Replies:** 0\
**Last updated:** [11 July 2020 04:28 UTC](https://discourse.nodered.org/t/udp-freeze-data/29882 "2020-07-11T04:28:11Z")

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Hello I am doing a UDP communication job in Matlab and node red, however the communication I have is slow, especially when I send data from Simulink to node red, I don't know why this could be, I did the test by sending…

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## [Rollease blinds Telnet control](https://discourse.nodered.org/t/rollease-blinds-telnet-control/29835)

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**Author:** [@nzmikechristiansen](https://discourse.nodered.org/u/nzmikechristiansen)\
**Replies:** 1\
**Last updated:** [10 July 2020 22:44 UTC](https://discourse.nodered.org/t/rollease-blinds-telnet-control/29835 "2020-07-10T22:44:17Z")

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Does anyone have any form of control working with rollease blinds using the Pulse 2 hub? There are other integrations with automation systems using telnet so it looks possible. Another open source project hubatat has so…

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## [Nodered 1.1.1 scrolling on iPad](https://discourse.nodered.org/t/nodered-1-1-1-scrolling-on-ipad/29833)

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**Author:** [@bdormael](https://discourse.nodered.org/u/bdormael)\
**Replies:** 6\
**Last updated:** [10 July 2020 21:07 UTC](https://discourse.nodered.org/t/nodered-1-1-1-scrolling-on-ipad/29833 "2020-07-10T21:07:21Z")

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Since version 1.1 when I open Nodered on my iPad Pro, I'm not able to scroll down/up anymore via touch screen in my flows. (with mouse attached to iPad I can scroll) Anybody elese experiencing this ? I've tried 2 iPads…

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## [Node-RED online conference on October 10th](https://discourse.nodered.org/t/node-red-online-conference-on-october-10th/29750)

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**Author:** [@kazuhitoyokoi](https://discourse.nodered.org/u/kazuhitoyokoi)\
**Replies:** 1\
**Last updated:** [10 July 2020 20:42 UTC](https://discourse.nodered.org/t/node-red-online-conference-on-october-10th/29750 "2020-07-10T20:42:39Z")

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Hello! Node-RED User Group Japan is going to hold the Node-RED conference on October 10th. Because of online conference, everyone can join the free event from YouTube Live. In our plan, more than 20 great speakers w…

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## [NR 1.1.0 Update Issues](https://discourse.nodered.org/t/nr-1-1-0-update-issues/29838)

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**Author:** [@lstebe](https://discourse.nodered.org/u/lstebe)\
**Replies:** 11\
**Last updated:** [10 July 2020 20:38 UTC](https://discourse.nodered.org/t/nr-1-1-0-update-issues/29838 "2020-07-10T20:38:19Z")

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Hi and Thanks for the great improvements implemented in the new NR1.1! I'm coming directly from NR 1.0.6 and got it running on different machines. RPi4, "High" Performance Server (10core AMD DDR4 RAM ubuntu and so on) …

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## [Updating node-RED - settings.js](https://discourse.nodered.org/t/updating-node-red-settings-js/29741)

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**Author:** [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)\
**Replies:** 11\
**Last updated:** [10 July 2020 20:32 UTC](https://discourse.nodered.org/t/updating-node-red-settings-js/29741 "2020-07-10T20:32:53Z")

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I always update node-RED by using the official script, and was already aware that the existing settings.js file (from the old node-RED) in not overwritten when the new version is installed. However, new features are add…

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## [PID controlled heater](https://discourse.nodered.org/t/pid-controlled-heater/29391)

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**Author:** [@h2omatt](https://discourse.nodered.org/u/h2omatt)\
**Replies:** 23\
**Last updated:** [10 July 2020 19:35 UTC](https://discourse.nodered.org/t/pid-controlled-heater/29391 "2020-07-10T19:35:31Z")

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All, New-ish to node red but have been using it in many applications and it has helped significantly reduce time to create a program with a simple UI that can be used in a lab environment. hopeing someone can help me on…

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## [Switch node - jsonata - magic?](https://discourse.nodered.org/t/switch-node-jsonata-magic/12943)

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**Author:** [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Replies:** 26\
**Last updated:** [10 July 2020 18:24 UTC](https://discourse.nodered.org/t/switch-node-jsonata-magic/12943 "2020-07-10T18:24:41Z")

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Example object: { "time\_utc": 1562311572, "Temperature": 21, "CO2": 434, "Humidity": 56, "Noise": 40, "Pressure": 1016.7, "AbsolutePressure": 1016.4, "min\_temp": 20.9, "max\_temp": 21.7, "date\_min\_tem…

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## [Embed node-red inside another application as an iframe with authentication from session](https://discourse.nodered.org/t/embed-node-red-inside-another-application-as-an-iframe-with-authentication-from-session/29867)

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**Author:** [@ashish-y](https://discourse.nodered.org/u/ashish-y)\
**Replies:** 0\
**Last updated:** [10 July 2020 18:16 UTC](https://discourse.nodered.org/t/embed-node-red-inside-another-application-as-an-iframe-with-authentication-from-session/29867 "2020-07-10T18:16:37Z")

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Hi, I want to embed the node-red editor as an iframe inside another js application. Similar to this Also, use the session information acquired from the custom login screen to be used as node-red authentication. Sce…

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