# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=851

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

**Page:** 852

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## [Serial Port Disconnection Issues "Input/output error"](https://discourse.nodered.org/t/serial-port-disconnection-issues-input-output-error/15090)

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**Author:** [@Testing1User](https://discourse.nodered.org/u/Testing1User)\
**Replies:** 0\
**Last updated:** [4 September 2019 10:32 UTC](https://discourse.nodered.org/t/serial-port-disconnection-issues-input-output-error/15090 "2019-09-04T10:32:54Z")

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Hi, I have 4 serial port inputs using the serial in node. It works fine most of the time but every now and then I get the following error when I deploy my nodes "serial port /dev/ttyUSB0 error: Error: Error: Input/out…

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## [Node-red-contrib-can](https://discourse.nodered.org/t/node-red-contrib-can/15059)

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**Author:** [@Ivan](https://discourse.nodered.org/u/Ivan)\
**Replies:** 3\
**Last updated:** [4 September 2019 08:58 UTC](https://discourse.nodered.org/t/node-red-contrib-can/15059 "2019-09-04T08:58:53Z")

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I installed node-red-contrib-can! Tell me how to use this package? I would be grateful for any example or documentation. Thank!

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## [Anyone tried traefik & docker node-red instances?](https://discourse.nodered.org/t/anyone-tried-traefik-docker-node-red-instances/15016)

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**Author:** [@luisgcu](https://discourse.nodered.org/u/luisgcu)\
**Replies:** 3\
**Last updated:** [4 September 2019 05:59 UTC](https://discourse.nodered.org/t/anyone-tried-traefik-docker-node-red-instances/15016 "2019-09-04T05:59:50Z")

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I have several Node-red docker instances running in a server and I want to use reverse proxy ( "easy SSL setup ") known as "traefik" to access them with different sub-domains. I tried but can't get that to work , ju…

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## [Node-red-contrib-cron-plus timezone error](https://discourse.nodered.org/t/node-red-contrib-cron-plus-timezone-error/15063)

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**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 19\
**Last updated:** [3 September 2019 20:54 UTC](https://discourse.nodered.org/t/node-red-contrib-cron-plus-timezone-error/15063 "2019-09-03T20:54:41Z")

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I am running node-red 0.20.7, nodejs 8.11.2 in Termux on Android. When using node-red-contrib-cron-plus 0.3.0 with the timezone setting empty it shows a status of Error: check timezone setting Though it does appear to…

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## [Logging out of Node-Red authentication](https://discourse.nodered.org/t/logging-out-of-node-red-authentication/15069)

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**Author:** [@jmacle](https://discourse.nodered.org/u/jmacle)\
**Replies:** 2\
**Last updated:** [3 September 2019 19:57 UTC](https://discourse.nodered.org/t/logging-out-of-node-red-authentication/15069 "2019-09-03T19:57:08Z")

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Hey there, There maybe a thread explaining but I can't seem to locate it, but I'm looking for a method to logout of node-red's admin authentication without having to wait for the token expiration. Can someone point me t…

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## [Creating a CloudFront Distribution](https://discourse.nodered.org/t/creating-a-cloudfront-distribution/15067)

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**Author:** [@jeremyd](https://discourse.nodered.org/u/jeremyd)\
**Replies:** 1\
**Last updated:** [3 September 2019 17:04 UTC](https://discourse.nodered.org/t/creating-a-cloudfront-distribution/15067 "2019-09-03T17:04:53Z")

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Hello, I am wanting to use an AWS CloudFront Distribution as a front to my EC2 instance so I can use the CloudFront SSL to secure API calls. When I create the distribution to my EC2 instance using port 1880 for HTTP and…

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## [Function to decrypt Base64 data from Node-Red and display on dashboard](https://discourse.nodered.org/t/function-to-decrypt-base64-data-from-node-red-and-display-on-dashboard/14941)

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**Author:** [@cherechi](https://discourse.nodered.org/u/cherechi)\
**Replies:** 22\
**Last updated:** [3 September 2019 13:39 UTC](https://discourse.nodered.org/t/function-to-decrypt-base64-data-from-node-red-and-display-on-dashboard/14941 "2019-09-03T13:39:02Z")

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Hello, Please, i am a bit confused on my project now. I am building a Lora communication system for sensor monitoring, I have 2 nodes which have Voltage and Current sensors connected to them at different frequencies. Th…

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## [How to extract a string value](https://discourse.nodered.org/t/how-to-extract-a-string-value/15020)

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**Author:** [@mike829](https://discourse.nodered.org/u/mike829)\
**Replies:** 14\
**Last updated:** [3 September 2019 10:30 UTC](https://discourse.nodered.org/t/how-to-extract-a-string-value/15020 "2019-09-03T10:30:54Z")

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Hello Everybody, I am working on a RS485 serial to ifttt project. I receive the string "INPUTSTATUS 0924400005454010004411444100444111447855" and I would like to extract only the second number, in this example "9". I…

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## [RasPi now locks up on NR after updating NR](https://discourse.nodered.org/t/raspi-now-locks-up-on-nr-after-updating-nr/14969)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 54\
**Last updated:** [3 September 2019 10:18 UTC](https://discourse.nodered.org/t/raspi-now-locks-up-on-nr-after-updating-nr/14969 "2019-09-03T10:18:18Z")

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I decided to go through and update some machines. Looking at the load: NR is 99% CPU load. Stopping it and starting it again I don't see anything in the output from the CLI. This is what I see when I start NR. pi@Mus…

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## [Alexa controlling device](https://discourse.nodered.org/t/alexa-controlling-device/15042)

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**Author:** [@purnima](https://discourse.nodered.org/u/purnima)\
**Replies:** 1\
**Last updated:** [3 September 2019 06:32 UTC](https://discourse.nodered.org/t/alexa-controlling-device/15042 "2019-09-03T06:32:32Z")

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Hii everyone, after so many days ,i started working with alexa. I just want suggestion . I am trying to create a flow in node red with some not real device and want to control those device with the alexa app. if skill i…

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## [Counting to three](https://discourse.nodered.org/t/counting-to-three/14875)

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**Author:** [@kitus](https://discourse.nodered.org/u/kitus)\
**Replies:** 25\
**Last updated:** [2 September 2019 20:30 UTC](https://discourse.nodered.org/t/counting-to-three/14875 "2019-09-02T20:30:33Z")

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Hello, I currently have several automations in Home Assistant that will roll down the covers and awning, they however rely on a poll state node which monitors one of my outdoor sensors (wind and rain). I would like to …

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## [Problem with http node and Axis camera](https://discourse.nodered.org/t/problem-with-http-node-and-axis-camera/14824)

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**Author:** [@mike67](https://discourse.nodered.org/u/mike67)\
**Replies:** 3\
**Last updated:** [2 September 2019 19:16 UTC](https://discourse.nodered.org/t/problem-with-http-node-and-axis-camera/14824 "2019-09-02T19:16:17Z")

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Hello i use an AXIS 207 Camear. I have created a node with this request in a GET :slight\_smile: http://192.168.1.80/axis-cgi/jpg/image.cgi?resolution=320x240 When I run this node once, it works, I can access to the i…

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## [Link nodes - what am I missing?](https://discourse.nodered.org/t/link-nodes-what-am-i-missing/14973)

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**Author:** [@nodecentral](https://discourse.nodered.org/u/nodecentral)\
**Replies:** 12\
**Last updated:** [2 September 2019 18:32 UTC](https://discourse.nodered.org/t/link-nodes-what-am-i-missing/14973 "2019-09-02T18:32:55Z")

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Hi, I’m trying to use the link nodes to connect the outputs of a switch node to the inputs of another section in my flow. And while I can create connections to the out node (and the links between them), I can’t create …

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## [Mustache date format](https://discourse.nodered.org/t/mustache-date-format/15034)

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**Author:** [@Tom\_pi](https://discourse.nodered.org/u/Tom_pi)\
**Replies:** 2\
**Last updated:** [2 September 2019 18:15 UTC](https://discourse.nodered.org/t/mustache-date-format/15034 "2019-09-02T18:15:47Z")

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Hello together, I have the following issue. I have stored several values in a database with a time stamp. The time stamp has the following format Timestamp: "2019-08-26T00:00:00.000Z" With the following mustache, I …

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## [Help needed. USB device into siemens iot 2040 out to serial port](https://discourse.nodered.org/t/help-needed-usb-device-into-siemens-iot-2040-out-to-serial-port/15030)

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**Author:** [@Egonic](https://discourse.nodered.org/u/Egonic)\
**Replies:** 2\
**Last updated:** [2 September 2019 16:41 UTC](https://discourse.nodered.org/t/help-needed-usb-device-into-siemens-iot-2040-out-to-serial-port/15030 "2019-09-02T16:41:34Z")

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Hi Guys, I am new to this iot envoirment.. I am trying to take a usb card reader into a siemens Iot 2040 and transmit the data to the serial port. Issue 1. Is that i cant see a usb node in node red. i have tried to in…

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## [Bug ? Deleting like wire does not activate Deploy button](https://discourse.nodered.org/t/bug-deleting-like-wire-does-not-activate-deploy-button/15032)

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**Author:** [@tilleul](https://discourse.nodered.org/u/tilleul)\
**Replies:** 1\
**Last updated:** [2 September 2019 16:39 UTC](https://discourse.nodered.org/t/bug-deleting-like-wire-does-not-activate-deploy-button/15032 "2019-09-02T16:39:30Z")

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Sorry if this has been reported and/or fixed before. I'm using NR v0.20.2 and I just noticed that deleting a (dashed) wire between two link nodes (link out/link in) on the same flow does not activate/enable the deploy b…

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## [Embed node-red \*and\* custom nodes in existing app?](https://discourse.nodered.org/t/embed-node-red-and-custom-nodes-in-existing-app/14986)

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**Author:** [@darrencruse](https://discourse.nodered.org/u/darrencruse)\
**Replies:** 6\
**Last updated:** [2 September 2019 15:46 UTC](https://discourse.nodered.org/t/embed-node-red-and-custom-nodes-in-existing-app/14986 "2019-09-02T15:46:24Z")

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TLDR Summary: When embedding node-red in an existing app, I'm hoping there's a way to "require" the app's modules from the .js files of custom nodes that I write. Details: I have an existing node.js express app (servi…

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## [Default configurations system](https://discourse.nodered.org/t/default-configurations-system/15015)

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**Author:** [@rwiest](https://discourse.nodered.org/u/rwiest)\
**Replies:** 5\
**Last updated:** [2 September 2019 15:08 UTC](https://discourse.nodered.org/t/default-configurations-system/15015 "2019-09-02T15:08:02Z")

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Hello, I need to implement a system where this system has some default settings. For example, file save location and an ambient temperature field. This information is later stored in a file. What I need is that every ti…

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## [Handling MQTT messages with occasional JSON payloads](https://discourse.nodered.org/t/handling-mqtt-messages-with-occasional-json-payloads/14910)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 21\
**Last updated:** [2 September 2019 14:27 UTC](https://discourse.nodered.org/t/handling-mqtt-messages-with-occasional-json-payloads/14910 "2019-09-02T14:27:59Z")

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As a kind of follow on from the other (recent) post, I am still stuck but with a new problem. I am sending commands to remote machines and monitoring their reply. When a command is received I get this: {"topic":"COMMA…

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## [How do I get the forecast from OpenWeatherMap?](https://discourse.nodered.org/t/how-do-i-get-the-forecast-from-openweathermap/15028)

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**Author:** [@SteveMann](https://discourse.nodered.org/u/SteveMann)\
**Replies:** 5\
**Last updated:** [2 September 2019 14:19 UTC](https://discourse.nodered.org/t/how-do-i-get-the-forecast-from-openweathermap/15028 "2019-09-02T14:19:26Z")

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I have openweathermap generating the current weather once a minute. That part works just fine. However, I would like to know if rain is in the forecast so that I can turn off my lawn sprinklers. I've tried creating a …

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## [Create new property](https://discourse.nodered.org/t/create-new-property/15026)

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**Author:** [@LazzaWA](https://discourse.nodered.org/u/LazzaWA)\
**Replies:** 3\
**Last updated:** [2 September 2019 09:40 UTC](https://discourse.nodered.org/t/create-new-property/15026 "2019-09-02T09:40:49Z")

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hi all, im sure this is a rookie question but... why is it when i sometimes try to create a new property such as the below screen shot that the new property doesn't get created ? Im using a change node to create a " ms…

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## [Node-RED MongoDB Update Example](https://discourse.nodered.org/t/node-red-mongodb-update-example/15022)

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**Author:** [@zgrdev](https://discourse.nodered.org/u/zgrdev)\
**Replies:** 1\
**Last updated:** [2 September 2019 08:37 UTC](https://discourse.nodered.org/t/node-red-mongodb-update-example/15022 "2019-09-02T08:37:21Z")

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hello everyone. i need some help for node-red and mongodb update command. i didn't update my ledButton value. here is my workflow \[{"id":"707a8db8.190a04","type":"tab","label":"Flow 6","disabled":false,"info":""},{"id"…

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## [Join node and order of messages](https://discourse.nodered.org/t/join-node-and-order-of-messages/13538)

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**Author:** [@camo200sx](https://discourse.nodered.org/u/camo200sx)\
**Replies:** 7\
**Last updated:** [2 September 2019 08:22 UTC](https://discourse.nodered.org/t/join-node-and-order-of-messages/13538 "2019-09-02T08:22:01Z")

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Heya! So I have 6 modbus sensors that are polled each, 1 sec apart. They run into a join node that outputs an array after 6 consecutive messages, and this is written to a CSV file. I have added a function node to each b…

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## [Nodered subflows not working。](https://discourse.nodered.org/t/nodered-subflows-not-working/14879)

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**Author:** [@peterwh83](https://discourse.nodered.org/u/peterwh83)\
**Replies:** 4\
**Last updated:** [2 September 2019 08:16 UTC](https://discourse.nodered.org/t/nodered-subflows-not-working/14879 "2019-09-02T08:16:28Z")

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We have several subflows in our Nodered flows, and they were working fine previously. However, they were not working until a month ago. the subflows are not receiving any data from other flows. And I noticed that there…

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## [Wattmeter data from sqlite](https://discourse.nodered.org/t/wattmeter-data-from-sqlite/14104)

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**Author:** [@Petr](https://discourse.nodered.org/u/Petr)\
**Replies:** 22\
**Last updated:** [2 September 2019 06:37 UTC](https://discourse.nodered.org/t/wattmeter-data-from-sqlite/14104 "2019-09-02T06:37:19Z")

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I hope my question is not "off topic" really. Many users here are using node-red to store energy (gas, water, electricity meters...) consumption data to the sql table. The simple table to store kWh consumption can look …

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## [Two ds18b20 sensors and i get one temperature](https://discourse.nodered.org/t/two-ds18b20-sensors-and-i-get-one-temperature/14979)

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**Author:** [@RudiRuessel](https://discourse.nodered.org/u/RudiRuessel)\
**Replies:** 28\
**Last updated:** [2 September 2019 06:12 UTC](https://discourse.nodered.org/t/two-ds18b20-sensors-and-i-get-one-temperature/14979 "2019-09-02T06:12:42Z")

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My problem is that i have two ds18b20 sensors and in my dashboard the gauge is jumping between this sensors. How my flow has to look like that i get two different temperatures on b my dashboard?

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## [Problems parsing MQTT data to dashboard](https://discourse.nodered.org/t/problems-parsing-mqtt-data-to-dashboard/15002)

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**Author:** [@pcborges](https://discourse.nodered.org/u/pcborges)\
**Replies:** 15\
**Last updated:** [2 September 2019 01:44 UTC](https://discourse.nodered.org/t/problems-parsing-mqtt-data-to-dashboard/15002 "2019-09-02T01:44:58Z")

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Hi, I am new to Node-Red. I have a working Mosquitto server. ESP32 publishes two sensor data that are shown at Node\_Red debug flow: Debug output was activated as follow: Plain from Mosquitto MQTT: Converted to J…

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## [Adapt JSON to worldmap format](https://discourse.nodered.org/t/adapt-json-to-worldmap-format/14937)

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**Author:** [@zz921286](https://discourse.nodered.org/u/zz921286)\
**Replies:** 9\
**Last updated:** [2 September 2019 01:03 UTC](https://discourse.nodered.org/t/adapt-json-to-worldmap-format/14937 "2019-09-02T01:03:57Z")

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Dear Srs, I obtain a JSON data like this: { "Nombre": \[ "ITEM0", "ITEM1", "ITEM2", "ITEM3", "ITEM4" \], "Latitud": \[ "43.523224", "43.522912", "43.523068", "43.522916", "43.5…

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## [No debug Tab on editor](https://discourse.nodered.org/t/no-debug-tab-on-editor/15003)

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**Author:** [@ALOKA1432](https://discourse.nodered.org/u/ALOKA1432)\
**Replies:** 12\
**Last updated:** [1 September 2019 21:08 UTC](https://discourse.nodered.org/t/no-debug-tab-on-editor/15003 "2019-09-01T21:08:58Z")

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I have my debug tab invisible on Node-RED. Any solutions ?

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## [Control a Benq video beamer with serial port](https://discourse.nodered.org/t/control-a-benq-video-beamer-with-serial-port/15009)

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**Author:** [@RogierQ](https://discourse.nodered.org/u/RogierQ)\
**Replies:** 5\
**Last updated:** [1 September 2019 19:52 UTC](https://discourse.nodered.org/t/control-a-benq-video-beamer-with-serial-port/15009 "2019-09-01T19:52:22Z")

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Hi! Trying hard to control my video beamer over rs232 serial port But without any succes, even no error messages :frowning: For example what i try to do is this: \*pow=off# So i put this in an inject node that is conn…

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