# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=742

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

**Page:** 743

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## [Execute a link receive from payload](https://discourse.nodered.org/t/execute-a-link-receive-from-payload/27380)

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**Author:** [@mykerinos1](https://discourse.nodered.org/u/mykerinos1)\
**Replies:** 2\
**Last updated:** [27 May 2020 18:18 UTC](https://discourse.nodered.org/t/execute-a-link-receive-from-payload/27380 "2020-05-27T18:18:30Z")

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Hello in my message payload i receive a secure link and i would like to execute it to receive ata from my weather station. How can i do ? Thanks

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## [Hall effect sensor counter!](https://discourse.nodered.org/t/hall-effect-sensor-counter/27199)

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**Author:** [@Mobile\_NR\_Env](https://discourse.nodered.org/u/Mobile_NR_Env)\
**Replies:** 18\
**Last updated:** [27 May 2020 16:12 UTC](https://discourse.nodered.org/t/hall-effect-sensor-counter/27199 "2020-05-27T16:12:58Z")

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Hello folks! Hope all are well. Node Red has basically taken over and I’m using it for most things in my home automation system! Loving it. What I’m looking for, is the ability to count a bunch of pulse results from a…

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## [Confused about combine logic result](https://discourse.nodered.org/t/confused-about-combine-logic-result/27368)

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**Author:** [@Benno](https://discourse.nodered.org/u/Benno)\
**Replies:** 7\
**Last updated:** [27 May 2020 16:03 UTC](https://discourse.nodered.org/t/confused-about-combine-logic-result/27368 "2020-05-27T16:03:16Z")

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Hi, Thanks in advance to everyone who can help me with this problem. With the combine node I evaluate a few window sensors (OR-Node) and 2 motion sensors (OR-Node). So far all are fine. But why is the AND-combination …

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## [Help with nodered mysql databse](https://discourse.nodered.org/t/help-with-nodered-mysql-databse/27371)

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**Author:** [@mehdizrr](https://discourse.nodered.org/u/mehdizrr)\
**Replies:** 6\
**Last updated:** [27 May 2020 15:34 UTC](https://discourse.nodered.org/t/help-with-nodered-mysql-databse/27371 "2020-05-27T15:34:39Z")

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hello everyone , i m new in this forum my project is read data from my plcsim 1200 and save it in mysql database . i don't know what i should set in my function please help me . thnx a lot

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## [Can't find palette from 'manage palette - install'](https://discourse.nodered.org/t/cant-find-palette-from-manage-palette-install/24436)

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**Author:** [@iotkismec](https://discourse.nodered.org/u/iotkismec)\
**Replies:** 16\
**Last updated:** [27 May 2020 12:53 UTC](https://discourse.nodered.org/t/cant-find-palette-from-manage-palette-install/24436 "2020-05-27T12:53:54Z")

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before this i can install all my palette from here. but not anymore because i cant find any palette. any solution to solve this?

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## [Detect double / long press with momentary switch](https://discourse.nodered.org/t/detect-double-long-press-with-momentary-switch/27356)

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**Author:** [@sansan](https://discourse.nodered.org/u/sansan)\
**Replies:** 5\
**Last updated:** [27 May 2020 11:03 UTC](https://discourse.nodered.org/t/detect-double-long-press-with-momentary-switch/27356 "2020-05-27T11:03:24Z")

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Hi everyone, I have a device that publish the state of a momentary switch to my MQTT broker. When I press the switch my device send a 1 into a topic and then a 0 when the button is released. Is there a simple way to d…

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## [How to access msg.payload array in mssql?](https://discourse.nodered.org/t/how-to-access-msg-payload-array-in-mssql/27362)

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**Author:** [@swapmicro](https://discourse.nodered.org/u/swapmicro)\
**Replies:** 9\
**Last updated:** [27 May 2020 10:58 UTC](https://discourse.nodered.org/t/how-to-access-msg-payload-array-in-mssql/27362 "2020-05-27T10:58:42Z")

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Hello there, I am trying to integrate node-red with different databases, Recently I working with mssql. for that I am useing node-red-contrib-mssql-plus. In this node I want to access msg.payload which output is in an…

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## [DHT - 22 temp/humidity sensor node quit working](https://discourse.nodered.org/t/dht-22-temp-humidity-sensor-node-quit-working/27338)

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**Author:** [@jasrob222](https://discourse.nodered.org/u/jasrob222)\
**Replies:** 3\
**Last updated:** [27 May 2020 10:27 UTC](https://discourse.nodered.org/t/dht-22-temp-humidity-sensor-node-quit-working/27338 "2020-05-27T10:27:59Z")

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My DHT-22 sensor quit working on my previously working flow. Is there any fix for this problem?

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## [Problem with global json object variable and JSONata switch decision](https://discourse.nodered.org/t/problem-with-global-json-object-variable-and-jsonata-switch-decision/27361)

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**Author:** [@ljpaff](https://discourse.nodered.org/u/ljpaff)\
**Replies:** 4\
**Last updated:** [27 May 2020 09:55 UTC](https://discourse.nodered.org/t/problem-with-global-json-object-variable-and-jsonata-switch-decision/27361 "2020-05-27T09:55:21Z")

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Dear friends, i have something strange. I am trying to make a switch decision with an Global JSON Object and JSONata condition. Problem is that in test zone resolves well but at execution time are not working as expecte…

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## [Offline installation of Node-Red and nodes](https://discourse.nodered.org/t/offline-installation-of-node-red-and-nodes/27303)

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**Author:** [@Sergi](https://discourse.nodered.org/u/Sergi)\
**Replies:** 4\
**Last updated:** [27 May 2020 09:21 UTC](https://discourse.nodered.org/t/offline-installation-of-node-red-and-nodes/27303 "2020-05-27T09:21:58Z")

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Hello, We need to install the Node-Red and some nodes in a PC without access to internet, as it will be located in a plant in a productive environment with limited access. Which are the options, if any, to do an offline…

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## [Login redirection](https://discourse.nodered.org/t/login-redirection/27360)

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**Author:** [@SamratChaudhuri](https://discourse.nodered.org/u/SamratChaudhuri)\
**Replies:** 4\
**Last updated:** [27 May 2020 08:38 UTC](https://discourse.nodered.org/t/login-redirection/27360 "2020-05-27T08:38:16Z")

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I am trying to navigate to a page after the user successfully logs into the login page. How can I do that?

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## [RevolutionPi Nodes](https://discourse.nodered.org/t/revolutionpi-nodes/27352)

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**Author:** [@Pac8](https://discourse.nodered.org/u/Pac8)\
**Replies:** 4\
**Last updated:** [27 May 2020 08:26 UTC](https://discourse.nodered.org/t/revolutionpi-nodes/27352 "2020-05-27T08:26:33Z")

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Hello All. After a pretty extensive setup for the revolution pi connect with 1 DO module and 1 DI module I finally have the unit up and running but cannot get the offical revolution pi nodes installed. I have them inst…

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## [Connection problems: Node red, mosquitto broker and esp32](https://discourse.nodered.org/t/connection-problems-node-red-mosquitto-broker-and-esp32/27062)

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**Author:** [@Joaovitor](https://discourse.nodered.org/u/Joaovitor)\
**Replies:** 25\
**Last updated:** [27 May 2020 05:33 UTC](https://discourse.nodered.org/t/connection-problems-node-red-mosquitto-broker-and-esp32/27062 "2020-05-27T05:33:02Z")

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I don't know if this is the most suitable forum for this discussion, but it is one of the most helpful ones I know in the business, so maybe there is someone who can help me. I am developing an Iot project and I usually…

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## [Newbie help – split text and store in variables](https://discourse.nodered.org/t/newbie-help-split-text-and-store-in-variables/27319)

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**Author:** [@chloroquine](https://discourse.nodered.org/u/chloroquine)\
**Replies:** 2\
**Last updated:** [26 May 2020 20:03 UTC](https://discourse.nodered.org/t/newbie-help-split-text-and-store-in-variables/27319 "2020-05-26T20:03:57Z")

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Using node-red, I receive messages from Telegram which are formatted like: { "payload": { "chatId": 12345, "messageId": 1, "type": "message", "content": "Hi\_.\_MainChat" }, "originalMessage": { …

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## [ESP8266-12f - Domoticz mqtt -node red](https://discourse.nodered.org/t/esp8266-12f-domoticz-mqtt-node-red/27163)

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**Author:** [@aabbas](https://discourse.nodered.org/u/aabbas)\
**Replies:** 11\
**Last updated:** [25 May 2020 14:28 UTC](https://discourse.nodered.org/t/esp8266-12f-domoticz-mqtt-node-red/27163 "2020-05-25T14:28:29Z")

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Hi, I have an esp8266-12F with dht22 sensor and I have node red installed on a rapberry pi 4. I am trying to connect the esp to node red by using domoticz mqtt. It always disconnected! Could you please verify if I am…

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## [How to Remove Node from Node-red Permanently?](https://discourse.nodered.org/t/how-to-remove-node-from-node-red-permanently/27317)

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**Author:** [@Squirrelbd](https://discourse.nodered.org/u/Squirrelbd)\
**Replies:** 2\
**Last updated:** [26 May 2020 15:04 UTC](https://discourse.nodered.org/t/how-to-remove-node-from-node-red-permanently/27317 "2020-05-26T15:04:06Z")

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To remove a node from node-red permanently, we have to go to settings, plotter then removes any of the nodes, Like shown in this video. Is there any other way to remove node from node red?

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## [Accessing msg properties that have a non standard variable identifier](https://discourse.nodered.org/t/accessing-msg-properties-that-have-a-non-standard-variable-identifier/27316)

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**Author:** [@tfmeier](https://discourse.nodered.org/u/tfmeier)\
**Replies:** 3\
**Last updated:** [26 May 2020 14:13 UTC](https://discourse.nodered.org/t/accessing-msg-properties-that-have-a-non-standard-variable-identifier/27316 "2020-05-26T14:13:26Z")

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I'm running into a problem with a function block to create fields for an InfluxDB connector. I use the JSON string to object conversion node in Node-RED and it correctly creates the object {"CF1":1,"CF2.5":1,"CF10":1,"PM…

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## [Node-red-contrib-zip corrupts on unzip](https://discourse.nodered.org/t/node-red-contrib-zip-corrupts-on-unzip/27212)

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**Author:** [@Jonvic1891](https://discourse.nodered.org/u/Jonvic1891)\
**Replies:** 9\
**Last updated:** [26 May 2020 12:56 UTC](https://discourse.nodered.org/t/node-red-contrib-zip-corrupts-on-unzip/27212 "2020-05-26T12:56:59Z")

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Im trying to Zip some photos so that i can send them via email but when i zip them and then unzip them the unziped file corrupts. When i open it the message states "Error interpreting JPEG image file (Not a JPEG file: s…

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## [Disable node selection](https://discourse.nodered.org/t/disable-node-selection/27304)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 4\
**Last updated:** [26 May 2020 12:42 UTC](https://discourse.nodered.org/t/disable-node-selection/27304 "2020-05-26T12:42:55Z")

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I was going to make a feature request to be able to disable a set of selected nodes but it I then thought Is that going to be available with up-coming group mode? Maybe it can be done already?

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## [Heating water with solar power and node-red-contrib-pid](https://discourse.nodered.org/t/heating-water-with-solar-power-and-node-red-contrib-pid/26930)

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**Author:** [@MartinH](https://discourse.nodered.org/u/MartinH)\
**Replies:** 8\
**Last updated:** [26 May 2020 09:14 UTC](https://discourse.nodered.org/t/heating-water-with-solar-power-and-node-red-contrib-pid/26930 "2020-05-26T09:14:07Z")

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Hi Guys, question about node-red-contrib-pid, heating water, solar power and, of course, nodered. What i have: I am using a small solar plant for my own use, about 1.5KW peak. When the sun shines an i dont use much e…

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## [Help with injecting a boolean value into a payload?](https://discourse.nodered.org/t/help-with-injecting-a-boolean-value-into-a-payload/9223)

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**Author:** [@Kroissantti](https://discourse.nodered.org/u/Kroissantti)\
**Replies:** 9\
**Last updated:** [25 May 2020 23:32 UTC](https://discourse.nodered.org/t/help-with-injecting-a-boolean-value-into-a-payload/9223 "2020-05-25T23:32:30Z")

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I am trying to inject a true or false value into my Siemens S7-300 PLC. I can only manage to send numbers trough inject node JSON for example: {"Value":\[5\]}. I need to toggle inputs on my PLC with a boolean value. Here …

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## [I have a question. Sensor data classification](https://discourse.nodered.org/t/i-have-a-question-sensor-data-classification/27270)

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**Author:** [@Athurian](https://discourse.nodered.org/u/Athurian)\
**Replies:** 9\
**Last updated:** [25 May 2020 19:52 UTC](https://discourse.nodered.org/t/i-have-a-question-sensor-data-classification/27270 "2020-05-25T19:52:51Z")

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As shown in the photo above, i2c succeeded in fetching data values. The problem is that it is difficult to distinguish the payload values. For example, in the first case it is ph, in the second case it is temperature a…

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## [Google blinds, nora openPercent works but close/open blinds command doesn't](https://discourse.nodered.org/t/google-blinds-nora-openpercent-works-but-close-open-blinds-command-doesnt/27268)

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**Author:** [@gdr2404](https://discourse.nodered.org/u/gdr2404)\
**Replies:** 3\
**Last updated:** [25 May 2020 18:46 UTC](https://discourse.nodered.org/t/google-blinds-nora-openpercent-works-but-close-open-blinds-command-doesnt/27268 "2020-05-25T18:46:30Z")

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Ive set up a sequence to open and close my bedroom blinds, all works fine if i use the inject node. I would like to use nora so i can use google to open and close them. When debugging the blinds node if i say "hey googl…

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## [NR Install Script - “Failed to install node.js” error](https://discourse.nodered.org/t/nr-install-script-failed-to-install-node-js-error/13813)

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**Author:** [@nodecentral](https://discourse.nodered.org/u/nodecentral)\
**Replies:** 18\
**Last updated:** [25 May 2020 17:08 UTC](https://discourse.nodered.org/t/nr-install-script-failed-to-install-node-js-error/13813 "2020-05-25T17:08:22Z")

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Hi I’ve been trying to install Node Red using a headless Debian OS on a virtual machine, but whenever I try to run the provided NR script (https://nodered.org/docs/getting-started/raspberrypi) , it does not get past the…

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## [Node-Red Update issue after ubuntu update](https://discourse.nodered.org/t/node-red-update-issue-after-ubuntu-update/27271)

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**Author:** [@kocherjj](https://discourse.nodered.org/u/kocherjj)\
**Replies:** 1\
**Last updated:** [25 May 2020 16:29 UTC](https://discourse.nodered.org/t/node-red-update-issue-after-ubuntu-update/27271 "2020-05-25T16:29:17Z")

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I ran into an issue today that I was able to simply resolve after some google searching but wanted to mention it here in case there is an underlying error that could be resolved. I have been running Ubuntu Server 64Bit …

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## [JSONata question](https://discourse.nodered.org/t/jsonata-question/27201)

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**Author:** [@ghayne](https://discourse.nodered.org/u/ghayne)\
**Replies:** 9\
**Last updated:** [25 May 2020 15:21 UTC](https://discourse.nodered.org/t/jsonata-question/27201 "2020-05-25T15:21:25Z")

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I am extracting data from my smart meter and thought I could make this change node into a one liner. But for the life of me I cannot replace "calc" in the second entry in the node with the reference to the value in the f…

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## [SofarSolar inverter - NodeRED as remote server for getting statistics](https://discourse.nodered.org/t/sofarsolar-inverter-nodered-as-remote-server-for-getting-statistics/27253)

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**Author:** [@Mckenzi](https://discourse.nodered.org/u/Mckenzi)\
**Replies:** 4\
**Last updated:** [25 May 2020 14:03 UTC](https://discourse.nodered.org/t/sofarsolar-inverter-nodered-as-remote-server-for-getting-statistics/27253 "2020-05-25T14:03:11Z")

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Dear All, Was trying to find the solution by myself but i failed. I have Sofar Solar inverter which has an option to send data to more servers . ( default is ginlong). How to get the data from inverter using Node-RE…

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## [Hourglass Timer Node problem](https://discourse.nodered.org/t/hourglass-timer-node-problem/25446)

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**Author:** [@affinite](https://discourse.nodered.org/u/affinite)\
**Replies:** 3\
**Last updated:** [25 May 2020 13:47 UTC](https://discourse.nodered.org/t/hourglass-timer-node-problem/25446 "2020-05-25T13:47:36Z")

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Hi I'm using the Hourglass node as a timer for engine hours on a boat. The node works great if I treat it nicely by issuing it with "start" and stop" commands however if my (RPi) system is shut down with the timer runn…

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## [Advice on monitoring the status of a switched output please](https://discourse.nodered.org/t/advice-on-monitoring-the-status-of-a-switched-output-please/27254)

<div class="topic-metadata">

**Author:** [@Bodad](https://discourse.nodered.org/u/Bodad)\
**Replies:** 2\
**Last updated:** [25 May 2020 13:44 UTC](https://discourse.nodered.org/t/advice-on-monitoring-the-status-of-a-switched-output-please/27254 "2020-05-25T13:44:53Z")

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Hi, I'm looking for advice on a good way to monitor when the status of a switched device is different from the switch position. I've been using Node-red for a few weeks now, learning how to control a number of ESP8266s…

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## [Hidden subflow after import](https://discourse.nodered.org/t/hidden-subflow-after-import/27259)

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**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 2\
**Last updated:** [25 May 2020 13:43 UTC](https://discourse.nodered.org/t/hidden-subflow-after-import/27259 "2020-05-25T13:43:54Z")

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I imported this example flow, which contains a subflow, but the subflow does not appear in the palette. The result is that I cannot delete it. I can see that it is there in the flows file. I have tried restarting node…

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