# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=550

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

**Page:** 551

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## [Node-red-contrib-s7 (Tag Configuration)](https://discourse.nodered.org/t/node-red-contrib-s7-tag-configuration/46105)

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**Author:** [@reachrao01](https://discourse.nodered.org/u/reachrao01)\
**Replies:** 1\
**Last updated:** [23 May 2021 07:46 UTC](https://discourse.nodered.org/t/node-red-contrib-s7-tag-configuration/46105 "2021-05-23T07:46:23Z")

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Dear All, Could please let us know the limitations of Tags (in numbers) configured to S7 1200 PLC with scan rate of 1 Second.

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## [Extracting data from weather station](https://discourse.nodered.org/t/extracting-data-from-weather-station/46096)

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**Author:** [@JdeV987](https://discourse.nodered.org/u/JdeV987)\
**Replies:** 4\
**Last updated:** [23 May 2021 06:51 UTC](https://discourse.nodered.org/t/extracting-data-from-weather-station/46096 "2021-05-23T06:51:22Z")

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I just started with Node-Red and Grafana. My 1st project is to intercept the radio signals from a Maplin 433MHz weather station and then to display it in Grafana via Node-Red. I use a RFlink gateway to intercept the si…

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## [How do Conbee2, Phoscon, raspberry,Node-red, zigbee2mqtt interact. What is what?](https://discourse.nodered.org/t/how-do-conbee2-phoscon-raspberry-node-red-zigbee2mqtt-interact-what-is-what/46077)

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**Author:** [@ie404](https://discourse.nodered.org/u/ie404)\
**Replies:** 5\
**Last updated:** [22 May 2021 20:05 UTC](https://discourse.nodered.org/t/how-do-conbee2-phoscon-raspberry-node-red-zigbee2mqtt-interact-what-is-what/46077 "2021-05-22T20:05:29Z")

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hi there, im trying to get my head around about some of the basics of a node-red based smart home, and what "parts" are interchangeable. short history: bought conbee2 stick, plugged it into raspi4 and installed it, ins…

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## [Node Red openzwave problems](https://discourse.nodered.org/t/node-red-openzwave-problems/19716)

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**Author:** [@Maximus1](https://discourse.nodered.org/u/Maximus1)\
**Replies:** 10\
**Last updated:** [22 May 2021 19:36 UTC](https://discourse.nodered.org/t/node-red-openzwave-problems/19716 "2021-05-22T19:36:36Z")

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hi there. my Pi3 has raspian running and i work on Node red V 0.20.8 this machine is running since months and now i bought a Z-Wave Stick (Everspring Z-Wave+ USB-Controller). I tried to install "node-red-contrib-openz…

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## [Failed to install: node-red-contrib-modbus](https://discourse.nodered.org/t/failed-to-install-node-red-contrib-modbus/46052)

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**Author:** [@santos](https://discourse.nodered.org/u/santos)\
**Replies:** 29\
**Last updated:** [22 May 2021 18:15 UTC](https://discourse.nodered.org/t/failed-to-install-node-red-contrib-modbus/46052 "2021-05-22T18:15:50Z")

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Dear colleagues. I am starting node-red with ubuntu and I have the following problem. I have installed it on ubuntu, and it runs on localhost: 1880. It runs directly when Linux starts. The problem I have had when trying …

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## [Unzip Error Cannot read property 'getNode' of undefined"](https://discourse.nodered.org/t/unzip-error-cannot-read-property-getnode-of-undefined/45953)

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**Author:** [@minhhn0205](https://discourse.nodered.org/u/minhhn0205)\
**Replies:** 10\
**Last updated:** [22 May 2021 17:59 UTC](https://discourse.nodered.org/t/unzip-error-cannot-read-property-getnode-of-undefined/45953 "2021-05-22T17:59:16Z")

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Hi, I use node-red-contrib-zip node to unzip the zip file. With version 1.0.0, unzip is OK, but the latest version is currently 1.1.0. then unzip error as attached picture. Anyone have the same error as me? :frowning: …

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## [Convert Ascii to Decimal](https://discourse.nodered.org/t/convert-ascii-to-decimal/46090)

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**Author:** [@DeSnor](https://discourse.nodered.org/u/DeSnor)\
**Replies:** 2\
**Last updated:** [22 May 2021 16:10 UTC](https://discourse.nodered.org/t/convert-ascii-to-decimal/46090 "2021-05-22T16:10:40Z")

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Hello, I need to convert Ascii data coming from a burst of data. this is coming from the COM port. 0021002#dC#�k0.0 I get online converted to 4 48 1 1 48 4 50 49 48 48 48 35 100 16 3 239 191 189 239 191 189 16 1 239…

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## [How protect critical section in node](https://discourse.nodered.org/t/how-protect-critical-section-in-node/46086)

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**Author:** [@Mamonetti](https://discourse.nodered.org/u/Mamonetti)\
**Replies:** 14\
**Last updated:** [22 May 2021 14:46 UTC](https://discourse.nodered.org/t/how-protect-critical-section-in-node/46086 "2021-05-22T14:46:26Z")

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I've just started to work with Node-RED and I've found a case where there is a potential critical section that I'd like to control (that's something easy to handle with mutex in low-level languages but I don't know if so…

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## [How would I remove a url at the end of a message?](https://discourse.nodered.org/t/how-would-i-remove-a-url-at-the-end-of-a-message/46093)

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**Author:** [@JPGoose](https://discourse.nodered.org/u/JPGoose)\
**Replies:** 2\
**Last updated:** [22 May 2021 14:39 UTC](https://discourse.nodered.org/t/how-would-i-remove-a-url-at-the-end-of-a-message/46093 "2021-05-22T14:39:51Z")

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I’m sending Twitter messages to the Alexa service so they can be read aloud but I’d like to remove URL’s that often appear at the end of a tweet. Not sure if this can be done but I thought I’d ask.

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## [Delay node not working - Lost connection to server](https://discourse.nodered.org/t/delay-node-not-working-lost-connection-to-server/46083)

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**Author:** [@qwyrp](https://discourse.nodered.org/u/qwyrp)\
**Replies:** 4\
**Last updated:** [22 May 2021 13:25 UTC](https://discourse.nodered.org/t/delay-node-not-working-lost-connection-to-server/46083 "2021-05-22T13:25:34Z")

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A while ago I updated my system and all seems well but I recently discovered the following error: My delay node isn't functioning anymore. It's getting started but then no respons and I notice the following error: Lost …

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## [Pause flow during certain hours of the day](https://discourse.nodered.org/t/pause-flow-during-certain-hours-of-the-day/46078)

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**Author:** [@HaVi](https://discourse.nodered.org/u/HaVi)\
**Replies:** 4\
**Last updated:** [22 May 2021 10:10 UTC](https://discourse.nodered.org/t/pause-flow-during-certain-hours-of-the-day/46078 "2021-05-22T10:10:35Z")

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To switch a lamp when there is movement I use the flow below, that works fine. Now I want to adjust the flow so that the lamp does not turn on during certain hours of the day (the same hours every day). Which node do yo…

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## [Waveshare oled pi hat spi](https://discourse.nodered.org/t/waveshare-oled-pi-hat-spi/46082)

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**Author:** [@biros](https://discourse.nodered.org/u/biros)\
**Replies:** 1\
**Last updated:** [22 May 2021 09:27 UTC](https://discourse.nodered.org/t/waveshare-oled-pi-hat-spi/46082 "2021-05-22T09:27:06Z")

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Hello, Is there a possibility to (directly) control a waveshare 2.23 inch oled hat? It is spi (i2c too but would involve soldering). The chip is SSD1305. The site explains the connection and examples in pyton (even on…

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## [Error stopping node: Close timed out](https://discourse.nodered.org/t/error-stopping-node-close-timed-out/46075)

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**Author:** [@kurtufiyde](https://discourse.nodered.org/u/kurtufiyde)\
**Replies:** 6\
**Last updated:** [22 May 2021 07:23 UTC](https://discourse.nodered.org/t/error-stopping-node-close-timed-out/46075 "2021-05-22T07:23:58Z")

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Getting this error , every time when i click deploy button or some times randomly , when i select the error it takes me to "configuration node tab" it is not highlighting any node in the flow so not sure how to find the …

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## [Sonoff ZigBee Tasmota and Node Red](https://discourse.nodered.org/t/sonoff-zigbee-tasmota-and-node-red/46036)

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**Author:** [@foskolo](https://discourse.nodered.org/u/foskolo)\
**Replies:** 3\
**Last updated:** [22 May 2021 06:04 UTC](https://discourse.nodered.org/t/sonoff-zigbee-tasmota-and-node-red/46036 "2021-05-22T06:04:24Z")

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Hi, I’m tying to use some Sonoff ZigBee switches with a Sonoff ZigBee bridge with Tasmota. I flashed Tasmota in the brigde and I paired two Sonoff switches whit it. All works fine. When I press a switch I see in the br…

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## [Node-Red Azure IoT Hub Provisioning Issues](https://discourse.nodered.org/t/node-red-azure-iot-hub-provisioning-issues/46059)

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**Author:** [@amendez](https://discourse.nodered.org/u/amendez)\
**Replies:** 0\
**Last updated:** [21 May 2021 21:19 UTC](https://discourse.nodered.org/t/node-red-azure-iot-hub-provisioning-issues/46059 "2021-05-21T21:19:10Z")

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Hi, has anyone been successful at using the "node-red-contrib-azure-iot-device" node to connect to IoT Hub using CA certificates? I have been successful to connect when using SAS key. Every time I try using certificates…

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## [Some nodes of core-nodes are not available](https://discourse.nodered.org/t/some-nodes-of-core-nodes-are-not-available/45727)

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**Author:** [@Dave-Azcarate](https://discourse.nodered.org/u/Dave-Azcarate)\
**Replies:** 9\
**Last updated:** [21 May 2021 20:52 UTC](https://discourse.nodered.org/t/some-nodes-of-core-nodes-are-not-available/45727 "2021-05-21T20:52:56Z")

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Hello, I hope someone could help me, let me explain, I'm using node red v.1.3.4 on orange pi, after upgrade node red I found this I can't use the " change node", could anyone help me, thanks

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## [Populate html template from a file](https://discourse.nodered.org/t/populate-html-template-from-a-file/45937)

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**Author:** [@mrSidX](https://discourse.nodered.org/u/mrSidX)\
**Replies:** 6\
**Last updated:** [21 May 2021 19:43 UTC](https://discourse.nodered.org/t/populate-html-template-from-a-file/45937 "2021-05-21T19:43:43Z")

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I'm trying to load the template node with an incoming template from a file node. When I pass the file payload to the template, I see mustache curly braces {{ xyz }} on the page. If I take this same template code and co…

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## [Help needed to create graph](https://discourse.nodered.org/t/help-needed-to-create-graph/46045)

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**Author:** [@menno](https://discourse.nodered.org/u/menno)\
**Replies:** 2\
**Last updated:** [21 May 2021 18:01 UTC](https://discourse.nodered.org/t/help-needed-to-create-graph/46045 "2021-05-21T18:01:23Z")

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hi girls and guys i am busy the whole day to generate a graph from my database but not able to fix this.... Currently my database has 2 entries ( just for test purpose ) In the future there will be more entrys. Outpu…

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## [Return nothing in a function with else](https://discourse.nodered.org/t/return-nothing-in-a-function-with-else/46046)

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**Author:** [@Becker](https://discourse.nodered.org/u/Becker)\
**Replies:** 2\
**Last updated:** [21 May 2021 17:13 UTC](https://discourse.nodered.org/t/return-nothing-in-a-function-with-else/46046 "2021-05-21T17:13:29Z")

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Hi, I need a function with if else, which gets every minute the actually msg. if ... == 100 than do ... :ok\_hand: else "stopp sending msg" is this possible to make the function not sending a msg as "else" ??

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## [Using a Switch Node to parse a Modbus Read Array](https://discourse.nodered.org/t/using-a-switch-node-to-parse-a-modbus-read-array/46007)

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**Author:** [@mgkeekrog](https://discourse.nodered.org/u/mgkeekrog)\
**Replies:** 4\
**Last updated:** [21 May 2021 15:48 UTC](https://discourse.nodered.org/t/using-a-switch-node-to-parse-a-modbus-read-array/46007 "2021-05-21T15:48:30Z")

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I'm reading 16 consecutive Modbus Input Contacts (i.e., function code 2) on a digital input card and the result from the Modbus node is an array of 16 elements. I'd like to use the Switch node to parse the 16 element arr…

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## [Emotiv Project via Bluetooth - Node Red](https://discourse.nodered.org/t/emotiv-project-via-bluetooth-node-red/46042)

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**Author:** [@emotivprojectowner](https://discourse.nodered.org/u/emotivprojectowner)\
**Replies:** 0\
**Last updated:** [21 May 2021 15:31 UTC](https://discourse.nodered.org/t/emotiv-project-via-bluetooth-node-red/46042 "2021-05-21T15:31:02Z")

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Hello Friends; My aim is control a robotic car with mental Commands. I used a flow via bluetooth, ıt works except mental commands. For example when ı am smile or etc, ıts works. But when its mental commants turns. I can…

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## [Outside - Light pir and switch mechanic](https://discourse.nodered.org/t/outside-light-pir-and-switch-mechanic/45986)

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**Author:** [@JobbeDeluxe](https://discourse.nodered.org/u/JobbeDeluxe)\
**Replies:** 4\
**Last updated:** [21 May 2021 13:53 UTC](https://discourse.nodered.org/t/outside-light-pir-and-switch-mechanic/45986 "2021-05-21T13:53:41Z")

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Hello, i am new on Node-red. I managed to make a simple switch on, light on. Also i managed to trigger pir to switch on the light. mein main problem is now: The light needs only be triggerd on time after it is dark (…

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## [Telegram receiver node stops after internet interruption](https://discourse.nodered.org/t/telegram-receiver-node-stops-after-internet-interruption/46025)

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**Author:** [@loeten](https://discourse.nodered.org/u/loeten)\
**Replies:** 0\
**Last updated:** [21 May 2021 09:29 UTC](https://discourse.nodered.org/t/telegram-receiver-node-stops-after-internet-interruption/46025 "2021-05-21T09:29:48Z")

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Dear all, I used successfully the node-red-contrib-telegrambot 8.9.6 for a while now. It worked, as long as it had connection to the internet (it runs in a remote raspberry pi). Then, the internet connection of the rasp…

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## [Output on restart](https://discourse.nodered.org/t/output-on-restart/45983)

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**Author:** [@Vlak](https://discourse.nodered.org/u/Vlak)\
**Replies:** 13\
**Last updated:** [21 May 2021 13:46 UTC](https://discourse.nodered.org/t/output-on-restart/45983 "2021-05-21T13:46:06Z")

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Dear folks, I have a question about a node and restarting node red. I have integrated node red in home assistant, and the moment I restart hassio, and therefore also node red, I get an output on my created node. how c …

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## [Compare latest 4 messages against mysql](https://discourse.nodered.org/t/compare-latest-4-messages-against-mysql/46020)

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**Author:** [@Fires04](https://discourse.nodered.org/u/Fires04)\
**Replies:** 2\
**Last updated:** [21 May 2021 12:27 UTC](https://discourse.nodered.org/t/compare-latest-4-messages-against-mysql/46020 "2021-05-21T12:27:55Z")

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Hi, I looking for a way how to compare the latest 4 messages against data in MySQL. I got a keypad that sends a message for every key pressed(MQTT message), now I using sequence-detector to check for a sequence of the …

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## [Dashboard login](https://discourse.nodered.org/t/dashboard-login/46028)

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**Author:** [@trintp1999](https://discourse.nodered.org/u/trintp1999)\
**Replies:** 1\
**Last updated:** [21 May 2021 10:39 UTC](https://discourse.nodered.org/t/dashboard-login/46028 "2021-05-21T10:39:25Z")

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Hi all, I wanna a dashboard login (with Authority management) when Smeone access to the UI node-red, What I have to do? Please help me. Tks!

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## [Passing 2 values into single influxdb node](https://discourse.nodered.org/t/passing-2-values-into-single-influxdb-node/45899)

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**Author:** [@subwayfootlong](https://discourse.nodered.org/u/subwayfootlong)\
**Replies:** 8\
**Last updated:** [21 May 2021 09:15 UTC](https://discourse.nodered.org/t/passing-2-values-into-single-influxdb-node/45899 "2021-05-21T09:15:58Z")

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Hello, in the influxdb node, you have to manually type the measurement name. I am able to extract the value and the value name from an array. I was wondering if I could also pass the value name into the influxdb node t…

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## [Change a string type to Date type](https://discourse.nodered.org/t/change-a-string-type-to-date-type/12066)

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**Author:** [@Kirakiira](https://discourse.nodered.org/u/Kirakiira)\
**Replies:** 10\
**Last updated:** [21 May 2021 08:39 UTC](https://discourse.nodered.org/t/change-a-string-type-to-date-type/12066 "2021-05-21T08:39:10Z")

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Hello all, I am trying to calculate a time difference between 2 dates (that I extract from a csv file), so I need my dates to have the correct date format. Here's their current format : dd/MM/yyyy HH:mm So far I cou…

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## [Repeat Mqtt Message 7 Times and Stop](https://discourse.nodered.org/t/repeat-mqtt-message-7-times-and-stop/46016)

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**Author:** [@kurtufiyde](https://discourse.nodered.org/u/kurtufiyde)\
**Replies:** 11\
**Last updated:** [21 May 2021 08:39 UTC](https://discourse.nodered.org/t/repeat-mqtt-message-7-times-and-stop/46016 "2021-05-21T08:39:08Z")

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Hi Everyone , I am using mqtt to power ON the device and using two STOP TIMER NODES the SECONDTIMER NODE wait for 12 second and send the payload to TRIGGER NODE which send message for every two 2 second ( 6 to 7 times )…

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## [Let's encrypt root certificate change](https://discourse.nodered.org/t/lets-encrypt-root-certificate-change/45866)

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**Author:** [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)\
**Replies:** 14\
**Last updated:** [21 May 2021 07:42 UTC](https://discourse.nodered.org/t/lets-encrypt-root-certificate-change/45866 "2021-05-21T07:42:37Z")

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Anyone know if the changes described here are likely to impact on node-RED users? I see that it makes particular reference to api's & IoT devices, but I don't really understand the implications...

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