# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1087

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

**Page:** 1088

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## [Sometimes getting errors when I redeploy a flow](https://discourse.nodered.org/t/sometimes-getting-errors-when-i-redeploy-a-flow/26914)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 2\
**Last updated:** [20 May 2020 07:23 UTC](https://discourse.nodered.org/t/sometimes-getting-errors-when-i-redeploy-a-flow/26914 "2020-05-20T07:23:39Z")

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This will need a lot of reading and a lot of patients trying to understand what it is doing. This is a subflow I have which is hooked up to a lot of stuff. There are nodes to configure the needed variables so they work. …

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## [Dht 11/22 hangs Node red when disconnected](https://discourse.nodered.org/t/dht-11-22-hangs-node-red-when-disconnected/26922)

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**Author:** [@Ki-va](https://discourse.nodered.org/u/Ki-va)\
**Replies:** 4\
**Last updated:** [20 May 2020 06:52 UTC](https://discourse.nodered.org/t/dht-11-22-hangs-node-red-when-disconnected/26922 "2020-05-20T06:52:40Z")

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hi, I have a problem with DHT sensors, if a sensor is malfunction or removed from my system (RPi 3b )under power, Node red hangs until the sensor is plugged in and NR continues. Is there a way to override a malfunctio…

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## [Debug JS code inside function node](https://discourse.nodered.org/t/debug-js-code-inside-function-node/26925)

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**Author:** [@tmichaeltx](https://discourse.nodered.org/u/tmichaeltx)\
**Replies:** 16\
**Last updated:** [20 May 2020 06:37 UTC](https://discourse.nodered.org/t/debug-js-code-inside-function-node/26925 "2020-05-20T06:37:32Z")

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I had what started off as a simple function node where the code has gotten much more complex as I have been addressing a variety of corner cases. Unfortunately all of that complexity has hidden some bugs. I really need t…

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## [Simple on/off timer with dynamic input](https://discourse.nodered.org/t/simple-on-off-timer-with-dynamic-input/26848)

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**Author:** [@Thewaver](https://discourse.nodered.org/u/Thewaver)\
**Replies:** 7\
**Last updated:** [20 May 2020 06:36 UTC](https://discourse.nodered.org/t/simple-on-off-timer-with-dynamic-input/26848 "2020-05-20T06:36:42Z")

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Hi, Im looking for a simple daily timer with an on/off set daily but with dynamic override from a UI on the dashboard. For example, every day a light comes on at 8.00pm and goes off at 11.00pm but for a couple of days I…

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## [Modbus TCP / Modbus RTU Gateway](https://discourse.nodered.org/t/modbus-tcp-modbus-rtu-gateway/26967)

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**Author:** [@Chris1](https://discourse.nodered.org/u/Chris1)\
**Replies:** 0\
**Last updated:** [20 May 2020 06:25 UTC](https://discourse.nodered.org/t/modbus-tcp-modbus-rtu-gateway/26967 "2020-05-20T06:25:16Z")

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Hi I'm new to node-red. I need to boild a gateway for Modbus. My home control system has a Modbus TCP connector and my ventilation control system uses Modbus RTU with an RS232 interface. What works so far: Raspberry P…

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## [Sending Data to S7-1200 with S7 out Node \[solved\]](https://discourse.nodered.org/t/sending-data-to-s7-1200-with-s7-out-node-solved/26895)

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**Author:** [@digidax](https://discourse.nodered.org/u/digidax)\
**Replies:** 2\
**Last updated:** [20 May 2020 05:59 UTC](https://discourse.nodered.org/t/sending-data-to-s7-1200-with-s7-out-node-solved/26895 "2020-05-20T05:59:54Z")

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Hi, I would like to send some integer values to a S7-1200, reading from it works perfect but can't write. This is my test flow to write: \[{"id":"b1743b10.6060c8","type":"s7 out","z":"b46347df.05287","endpoint":"4be029…

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## [\[Solved\] How to control a raspi with mqtt?](https://discourse.nodered.org/t/solved-how-to-control-a-raspi-with-mqtt/26950)

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**Author:** [@Maximus1](https://discourse.nodered.org/u/Maximus1)\
**Replies:** 5\
**Last updated:** [20 May 2020 05:21 UTC](https://discourse.nodered.org/t/solved-how-to-control-a-raspi-with-mqtt/26950 "2020-05-20T05:21:07Z")

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hi i have raspi 2 as ambilight controller and want to send commands like stop hyperion etc. to that machine. can you show me a best practise?

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## [Assign Variable in UI-Template from msg \[solved\]](https://discourse.nodered.org/t/assign-variable-in-ui-template-from-msg-solved/26963)

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**Author:** [@bdbell](https://discourse.nodered.org/u/bdbell)\
**Replies:** 1\
**Last updated:** [20 May 2020 03:35 UTC](https://discourse.nodered.org/t/assign-variable-in-ui-template-from-msg-solved/26963 "2020-05-20T03:35:11Z")

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I am using Steel Series Gauges in a Dashboard to show temperatures. I would like to adjust the colors to reflect the heating/cooling setpoints. The gauge is created inside a ui-template node. I am sending the heat/c…

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## [Why appear "connection lost" in browsers](https://discourse.nodered.org/t/why-appear-connection-lost-in-browsers/26907)

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**Author:** [@TomLi](https://discourse.nodered.org/u/TomLi)\
**Replies:** 8\
**Last updated:** [20 May 2020 00:49 UTC](https://discourse.nodered.org/t/why-appear-connection-lost-in-browsers/26907 "2020-05-20T00:49:32Z")

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When I access ui by https://xxx/ui/, it shows Connection lost. please help me . Thank you !

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## [\[Uibuilder\] Send data the msg.payload](https://discourse.nodered.org/t/uibuilder-send-data-the-msg-payload/26958)

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**Author:** [@OmarDev](https://discourse.nodered.org/u/OmarDev)\
**Replies:** 1\
**Last updated:** [20 May 2020 00:43 UTC](https://discourse.nodered.org/t/uibuilder-send-data-the-msg-payload/26958 "2020-05-20T00:43:27Z")

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Hey everyone i want to send data(counterBtn) to msg.payload this.counterBtn = this.counterBtn + 1 uibuilder.onChange( { 'payload': { 'type': 'counterBtn', 'btnCoun…

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## [Sending Values from NodeRed to Grafana with SimpleJSON](https://discourse.nodered.org/t/sending-values-from-nodered-to-grafana-with-simplejson/26675)

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**Author:** [@mtp211](https://discourse.nodered.org/u/mtp211)\
**Replies:** 38\
**Last updated:** [19 May 2020 23:11 UTC](https://discourse.nodered.org/t/sending-values-from-nodered-to-grafana-with-simplejson/26675 "2020-05-19T23:11:18Z")

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Im trying to send the values of a sensor to Grafana via NodeRed with the help of SimpleJSON Plugin. This is my NodeRed Flow And my functions are 1st: tmp = \[\]; tmp.push(parseFloat(msg.payload)); tmp.push(parseInt(n…

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## [New to Node Red - trying to decide which route?](https://discourse.nodered.org/t/new-to-node-red-trying-to-decide-which-route/26809)

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**Author:** [@KevinH67](https://discourse.nodered.org/u/KevinH67)\
**Replies:** 40\
**Last updated:** [19 May 2020 22:35 UTC](https://discourse.nodered.org/t/new-to-node-red-trying-to-decide-which-route/26809 "2020-05-19T22:35:49Z")

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Please (please) excuse my ignorance and brevity. I'm trying to decide between Node Red, Home Assistant and RPi Python. I used to machine code in the early 1980s but now in my middle 50s,coding is not so easy. But I am …

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## [Running a Python Script in Node Red](https://discourse.nodered.org/t/running-a-python-script-in-node-red/26906)

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**Author:** [@slogan87](https://discourse.nodered.org/u/slogan87)\
**Replies:** 5\
**Last updated:** [19 May 2020 22:30 UTC](https://discourse.nodered.org/t/running-a-python-script-in-node-red/26906 "2020-05-19T22:30:38Z")

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Hi everyone, I am having issues with running a python script in Node Red. A bit of background into what I am trying to do: I have a Raspberry Pi that use to run CraftBeerPi which is a Python based brewing application. …

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## [Very Basic Question \[Solved\]](https://discourse.nodered.org/t/very-basic-question-solved/26954)

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**Author:** [@tmichaeltx](https://discourse.nodered.org/u/tmichaeltx)\
**Replies:** 6\
**Last updated:** [19 May 2020 22:19 UTC](https://discourse.nodered.org/t/very-basic-question-solved/26954 "2020-05-19T22:19:17Z")

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I am trying to start developing my own node. I copied the information from Creating your first node https://nodered.org/docs/creating-nodes/first-node I got through this part of the instructions: In your node-red user …

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## [Msg replayed in UI node after a tab switch](https://discourse.nodered.org/t/msg-replayed-in-ui-node-after-a-tab-switch/25032)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 13\
**Last updated:** [19 May 2020 16:39 UTC](https://discourse.nodered.org/t/msg-replayed-in-ui-node-after-a-tab-switch/25032 "2020-05-19T16:39:09Z")

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Hi folks, some time ago @Thierry has created a very useful pull request to add the persistantFrontEndValue property to the addWidget function. That new property has helped me already a lot in some of my UI nodes to avo…

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## [Modbus temperature sensor](https://discourse.nodered.org/t/modbus-temperature-sensor/26818)

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**Author:** [@Luca](https://discourse.nodered.org/u/Luca)\
**Replies:** 4\
**Last updated:** [19 May 2020 16:27 UTC](https://discourse.nodered.org/t/modbus-temperature-sensor/26818 "2020-05-19T16:27:34Z")

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Hi everyone, I'm trying to read temperature and humidity using my Raspberry pi4 form a Modbus sensor http://www.bizkit.ru/wp-content/uploads/2018/11/Temperature-and-humidity-transmitter-SHT20-sensor-Modbus-RS485.pdf us…

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## [Can i set a switch to invisible?](https://discourse.nodered.org/t/can-i-set-a-switch-to-invisible/26891)

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**Author:** [@Bond](https://discourse.nodered.org/u/Bond)\
**Replies:** 2\
**Last updated:** [19 May 2020 16:18 UTC](https://discourse.nodered.org/t/can-i-set-a-switch-to-invisible/26891 "2020-05-19T16:18:57Z")

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Hello everyone, I'm doing an automation controller, which has Auto/Manual mode. In the dashboard, I have multiple switches to control my devives. But in Auto mode, I will not use those switches. For an elegant solution…

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## [Formatting my Table](https://discourse.nodered.org/t/formatting-my-table/26755)

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**Author:** [@alcor007](https://discourse.nodered.org/u/alcor007)\
**Replies:** 7\
**Last updated:** [19 May 2020 14:30 UTC](https://discourse.nodered.org/t/formatting-my-table/26755 "2020-05-19T14:30:00Z")

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Hi all, I just started to discover node-red and already learned so much. However, I could use a little help on formatting a table with values from MQTT sensors. In the example below, I hard-coded a table the old-fashion…

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## [Iphone / android notification with pushback](https://discourse.nodered.org/t/iphone-android-notification-with-pushback/26431)

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**Author:** [@Hjorth-Jensen](https://discourse.nodered.org/u/Hjorth-Jensen)\
**Replies:** 11\
**Last updated:** [19 May 2020 14:14 UTC](https://discourse.nodered.org/t/iphone-android-notification-with-pushback/26431 "2020-05-19T14:14:35Z")

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Hello everyone Has anyone tried using pushback.io? It looks very interesting. It can be used to send notifications both to Andriod and Iphone, where you can reply back with multi reply options. There are several prog…

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## [Trying to edit a xml file](https://discourse.nodered.org/t/trying-to-edit-a-xml-file/26908)

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**Author:** [@Meneldil](https://discourse.nodered.org/u/Meneldil)\
**Replies:** 8\
**Last updated:** [19 May 2020 12:36 UTC](https://discourse.nodered.org/t/trying-to-edit-a-xml-file/26908 "2020-05-19T12:36:04Z")

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Hello everyone, i'm a beginner with Node-RED and I would like to modify the value of all the "PORT" tags of a XML file that looks like this : \<SR\>\<STATE\>\<SYSERROR\>TRUE\</SYSERROR\>\<PLXR\>FALSE\</PLXR\>\<CHAMPWR\>ON\</CHAMPWR\>\<M…

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## [Reporting potential bugs on dev branch - useful or just noise?](https://discourse.nodered.org/t/reporting-potential-bugs-on-dev-branch-useful-or-just-noise/26885)

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**Author:** [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Replies:** 5\
**Last updated:** [19 May 2020 12:14 UTC](https://discourse.nodered.org/t/reporting-potential-bugs-on-dev-branch-useful-or-just-noise/26885 "2020-05-19T12:14:28Z")

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Hi all, What is the protocol for reporting bugs found on the dev branch of core node-red? I realise this is not release and its likely WIP but while I am playing around in the core (the monaco stuff) I realise there is…

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## [Node-red-contrib-ui-artless-gauge - issue with iphone safari](https://discourse.nodered.org/t/node-red-contrib-ui-artless-gauge-issue-with-iphone-safari/26594)

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**Author:** [@JoseGodinho](https://discourse.nodered.org/u/JoseGodinho)\
**Replies:** 33\
**Last updated:** [19 May 2020 12:11 UTC](https://discourse.nodered.org/t/node-red-contrib-ui-artless-gauge-issue-with-iphone-safari/26594 "2020-05-19T12:11:13Z")

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Hello All, especially the creator of this fantastic node @hotNipi . I am using iphone safari, and it cannot present a page with 9 of this very nice gauges. With all the other browsers, safari desktop included it works …

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## [What is handle as stream check box in split not does?](https://discourse.nodered.org/t/what-is-handle-as-stream-check-box-in-split-not-does/26913)

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**Author:** [@ab73863](https://discourse.nodered.org/u/ab73863)\
**Replies:** 5\
**Last updated:** [19 May 2020 12:04 UTC](https://discourse.nodered.org/t/what-is-handle-as-stream-check-box-in-split-not-does/26913 "2020-05-19T12:04:22Z")

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I was trying to understand the split node and I stumbled up on this option check box which mentions "handle as stream" for splitting a string. Could anyone share me an example for understanding this feature of split nod…

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## [How to setting data continue](https://discourse.nodered.org/t/how-to-setting-data-continue/23939)

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**Author:** [@sarawut](https://discourse.nodered.org/u/sarawut)\
**Replies:** 2\
**Last updated:** [19 May 2020 10:02 UTC](https://discourse.nodered.org/t/how-to-setting-data-continue/23939 "2020-05-19T10:02:18Z")

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Now i get data like picture I want head columm still have only row1 and data continue to row 2,3,4,5 ... Don't want head columm row1 and row2 = data and row3 = head name row 4 = data 5 second later Please help me

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## [Reliable Sydney Weather source?](https://discourse.nodered.org/t/reliable-sydney-weather-source/11992)

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**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 8\
**Last updated:** [19 May 2020 09:21 UTC](https://discourse.nodered.org/t/reliable-sydney-weather-source/11992 "2020-05-19T09:21:19Z")

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Guys, What are people from Sydney, Australia using as a reliable weather source ? I am using Darksky - but find that (for instance now) that it is telling me i have 100% cloud cover, whilst it is a bright sunny cloudles…

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## [New Forum Category suggestion - Contrib node suggestions](https://discourse.nodered.org/t/new-forum-category-suggestion-contrib-node-suggestions/26900)

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**Author:** [@thinkbig1979](https://discourse.nodered.org/u/thinkbig1979)\
**Replies:** 2\
**Last updated:** [19 May 2020 08:38 UTC](https://discourse.nodered.org/t/new-forum-category-suggestion-contrib-node-suggestions/26900 "2020-05-19T08:38:09Z")

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May I suggest a new category in the forum called something along the lines of "Please develop a node for this..." People with a need not yet covered by existing nodes, but not able to develop that themselves can post th…

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## [Invalid input: NaN using rpi gpio](https://discourse.nodered.org/t/invalid-input-nan-using-rpi-gpio/26842)

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**Author:** [@bjo](https://discourse.nodered.org/u/bjo)\
**Replies:** 12\
**Last updated:** [19 May 2020 08:36 UTC](https://discourse.nodered.org/t/invalid-input-nan-using-rpi-gpio/26842 "2020-05-19T08:36:28Z")

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Hi, I'm trying to get the following flow working. According to the debug output of "on" or "off", msg.payload is "1" or "0" as a number. But the status of pump says Invalid input: NaN and nrgpio python command not runni…

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## [Google Home - Nora](https://discourse.nodered.org/t/google-home-nora/26772)

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**Author:** [@aabbas](https://discourse.nodered.org/u/aabbas)\
**Replies:** 2\
**Last updated:** [19 May 2020 08:24 UTC](https://discourse.nodered.org/t/google-home-nora/26772 "2020-05-19T08:24:37Z")

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How do you connect a new node/device in Node-Red (NORA) to an existing Google Home device? When I add a new device (for example a socket in the living room) to my flow in node-red, even if I name it exactly the same as i…

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## [Subflow environment variables issue (\_info, \_type)](https://discourse.nodered.org/t/subflow-environment-variables-issue-info-type/26894)

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**Author:** [@offreal](https://discourse.nodered.org/u/offreal)\
**Replies:** 3\
**Last updated:** [19 May 2020 08:03 UTC](https://discourse.nodered.org/t/subflow-environment-variables-issue-info-type/26894 "2020-05-19T08:03:56Z")

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Hi, I created simple subflow with one input, and one output. Subflow has 3 properties: unit\_test, unit\_type, unit\_tell. All of them are dropdowns with two options and string values. Inside subflow there are function, …

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## [Read device by RS485 ASCII](https://discourse.nodered.org/t/read-device-by-rs485-ascii/26719)

<div class="topic-metadata">

**Author:** [@json\_lame](https://discourse.nodered.org/u/json_lame)\
**Replies:** 58\
**Last updated:** [19 May 2020 07:38 UTC](https://discourse.nodered.org/t/read-device-by-rs485-ascii/26719 "2020-05-19T07:38:46Z")

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Hi everyone, First, I'm sorry for my english, I'm from Poland and technical language is little bit hard for me, but I will try to describe my problem very precisely. I got device, which shows current water flow and hav…

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