# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1235

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

**Page:** 1236

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## [Understanding the rbe node](https://discourse.nodered.org/t/understanding-the-rbe-node/14974)

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**Author:** [@SeRiusRod](https://discourse.nodered.org/u/SeRiusRod)\
**Replies:** 7\
**Last updated:** [31 August 2019 20:44 UTC](https://discourse.nodered.org/t/understanding-the-rbe-node/14974 "2019-08-31T20:44:09Z")

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I've programmed a flow for turning on and off the TV using node-red-contrib-bravia. Since those nodes don't return a status change and this is a device that often is switched from it's remote, I implemented an automated …

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## [Create groups and populate on the fly, possible?](https://discourse.nodered.org/t/create-groups-and-populate-on-the-fly-possible/14664)

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**Author:** [@SeRiusRod](https://discourse.nodered.org/u/SeRiusRod)\
**Replies:** 8\
**Last updated:** [31 August 2019 19:08 UTC](https://discourse.nodered.org/t/create-groups-and-populate-on-the-fly-possible/14664 "2019-08-31T19:08:27Z")

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I have all my sensors data grouped in rooms and stored in context. Could be possible to iterate through the rooms and creating a group for each one and then create widgets for the sensors values on them? I'm still learn…

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## [Thermostat and save config after reboot system](https://discourse.nodered.org/t/thermostat-and-save-config-after-reboot-system/14805)

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**Author:** [@Notturno](https://discourse.nodered.org/u/Notturno)\
**Replies:** 13\
**Last updated:** [31 August 2019 13:24 UTC](https://discourse.nodered.org/t/thermostat-and-save-config-after-reboot-system/14805 "2019-08-31T13:24:56Z")

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Hello. Installed Node-Red to work with esp8266 in iot. I want to adjust the heating control according to the set temperature obtained from 18B20, as well as according to the set days and times. Tell me, how can I solve…

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## [Receive image from remote raspberry pi](https://discourse.nodered.org/t/receive-image-from-remote-raspberry-pi/14938)

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**Author:** [@martinschki](https://discourse.nodered.org/u/martinschki)\
**Replies:** 2\
**Last updated:** [31 August 2019 10:30 UTC](https://discourse.nodered.org/t/receive-image-from-remote-raspberry-pi/14938 "2019-08-31T10:30:49Z")

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Hi all, I just finished part one of my doorbell project. I'm using a Raspberry with a push button connected to publish a MQTT topic to my MQTT server which also runs my node red install. For that I'm using https://gith…

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## [This flow (on one machine) works. On another machine it doesn't](https://discourse.nodered.org/t/this-flow-on-one-machine-works-on-another-machine-it-doesnt/14967)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 16\
**Last updated:** [31 August 2019 07:58 UTC](https://discourse.nodered.org/t/this-flow-on-one-machine-works-on-another-machine-it-doesnt/14967 "2019-08-31T07:58:12Z")

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I have a flow (with non-standard nodes) and it works on "machine A". I have worked out it is easier to export entire flow tabs rather than mess around importing parts. So here is a picture of it on "machine A": It i…

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## [Crashes after adding an external module](https://discourse.nodered.org/t/crashes-after-adding-an-external-module/14891)

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**Author:** [@SeRiusRod](https://discourse.nodered.org/u/SeRiusRod)\
**Replies:** 1\
**Last updated:** [30 August 2019 23:46 UTC](https://discourse.nodered.org/t/crashes-after-adding-an-external-module/14891 "2019-08-30T23:46:12Z")

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I'm trying to add an external module to get signal strengt from my modem. I installed the package while at the same settings folder with: npm install dialog-router-api --save I confirmed the module exists in ./node\_mo…

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## [Node-red-contrib-ui-sys-loft -- question](https://discourse.nodered.org/t/node-red-contrib-ui-sys-loft-question/14964)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 3\
**Last updated:** [30 August 2019 22:11 UTC](https://discourse.nodered.org/t/node-red-contrib-ui-sys-loft-question/14964 "2019-08-30T22:11:56Z")

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I found that node in the library. The link Opened it and it has a link to a github page but I am not discerning much of a readme file. What does it give?

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## [How to split like "value in array"](https://discourse.nodered.org/t/how-to-split-like-value-in-array/14923)

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**Author:** [@SeRiusRod](https://discourse.nodered.org/u/SeRiusRod)\
**Replies:** 3\
**Last updated:** [30 August 2019 16:28 UTC](https://discourse.nodered.org/t/how-to-split-like-value-in-array/14923 "2019-08-30T16:28:49Z")

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I'n trying to separate one flow depending if one property is included in a set of values or in other. By now it only has two options (two different sets) but today may have more. I'm trying to acomplish this in a functi…

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## [First flow deploy fail](https://discourse.nodered.org/t/first-flow-deploy-fail/14948)

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**Author:** [@jason83](https://discourse.nodered.org/u/jason83)\
**Replies:** 15\
**Last updated:** [30 August 2019 15:46 UTC](https://discourse.nodered.org/t/first-flow-deploy-fail/14948 "2019-08-30T15:46:22Z")

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When creating my first flow with an inject node and a debug node, I connect the two with a wire and when I try to deploy I get the following fail message: "activeProject.isMerging is not a function." Why am I getting t…

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## [Colour and label size in contrib.worldmap](https://discourse.nodered.org/t/colour-and-label-size-in-contrib-worldmap/14943)

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**Author:** [@Chinmay](https://discourse.nodered.org/u/Chinmay)\
**Replies:** 3\
**Last updated:** [30 August 2019 14:12 UTC](https://discourse.nodered.org/t/colour-and-label-size-in-contrib-worldmap/14943 "2019-08-30T14:12:58Z")

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Hello, I have a question. How to change the label size(that shows Locust:Yes.......)?I would want that much bigger. The function code picture is shown below. Thank you in advance

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## [How to block trigger node?](https://discourse.nodered.org/t/how-to-block-trigger-node/14928)

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**Author:** [@hathemi](https://discourse.nodered.org/u/hathemi)\
**Replies:** 5\
**Last updated:** [30 August 2019 10:11 UTC](https://discourse.nodered.org/t/how-to-block-trigger-node/14928 "2019-08-30T10:11:55Z")

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i have a trigger node that resend me the existant msg every 1s. Isthere a way to block the sending msg for a limit time ?

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## [Node Red Installation on Mac](https://discourse.nodered.org/t/node-red-installation-on-mac/14931)

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**Author:** [@Avipur](https://discourse.nodered.org/u/Avipur)\
**Replies:** 2\
**Last updated:** [30 August 2019 09:30 UTC](https://discourse.nodered.org/t/node-red-installation-on-mac/14931 "2019-08-30T09:30:07Z")

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Hi All, I am beginner to node. I installed Nodejs and Node Red on my Mac . However when I enter node red command in Terminal. I get following errors. I tried uninstalling and installing but I still continue to get th…

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## [Plot a point on the line path (in node-red-contrib-web-worldmap)](https://discourse.nodered.org/t/plot-a-point-on-the-line-path-in-node-red-contrib-web-worldmap/14927)

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**Author:** [@Chinmay](https://discourse.nodered.org/u/Chinmay)\
**Replies:** 2\
**Last updated:** [30 August 2019 08:38 UTC](https://discourse.nodered.org/t/plot-a-point-on-the-line-path-in-node-red-contrib-web-worldmap/14927 "2019-08-30T08:38:11Z")

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Hello, Here below is how my map looks. And this is the code for this. Now I would want a big size highlighted point on the line(path) there, maybe like \*,X . And also if possible I want a message to popup with big s…

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## [Help with delay](https://discourse.nodered.org/t/help-with-delay/14767)

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**Author:** [@insomniux](https://discourse.nodered.org/u/insomniux)\
**Replies:** 8\
**Last updated:** [30 August 2019 05:37 UTC](https://discourse.nodered.org/t/help-with-delay/14767 "2019-08-30T05:37:26Z")

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I am monitoring main power status in a remote place (using a GSM internet connection) and want that if the power outage takes more than a certain delay, a messages is issued. The system has a battery backup so messages s…

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## [Stop state change from running within a time window](https://discourse.nodered.org/t/stop-state-change-from-running-within-a-time-window/14900)

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**Author:** [@nixdat](https://discourse.nodered.org/u/nixdat)\
**Replies:** 2\
**Last updated:** [30 August 2019 02:16 UTC](https://discourse.nodered.org/t/stop-state-change-from-running-within-a-time-window/14900 "2019-08-30T02:16:09Z")

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Hi There, I'm new to node-red and looking for some pointers. I have looked through the forums but can't seem to find what I'm after. Problem: I have a d1 mini present detector in my car, so when I leave or arrive home …

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## [Need suggestion on how to proceed web search data retrieval](https://discourse.nodered.org/t/need-suggestion-on-how-to-proceed-web-search-data-retrieval/14650)

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**Author:** [@Raj](https://discourse.nodered.org/u/Raj)\
**Replies:** 8\
**Last updated:** [30 August 2019 00:44 UTC](https://discourse.nodered.org/t/need-suggestion-on-how-to-proceed-web-search-data-retrieval/14650 "2019-08-30T00:44:55Z")

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Hi Guys, I have reached a road bump that I have no idea how to solve. I have created a web page using the HTTP endpoint node with the get option, so someone can type localhost:1880/webpage-name to activate that flow, t…

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## [HTTP in HTTP out nodes to show results from database search](https://discourse.nodered.org/t/http-in-http-out-nodes-to-show-results-from-database-search/14873)

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**Author:** [@Raj](https://discourse.nodered.org/u/Raj)\
**Replies:** 4\
**Last updated:** [29 August 2019 19:18 UTC](https://discourse.nodered.org/t/http-in-http-out-nodes-to-show-results-from-database-search/14873 "2019-08-29T19:18:58Z")

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I have various fields from the results of a database search returned in, msg.test1\[0\]xxx where xxx are the field names, the data is in the name, field value notation from the view in debug. How do I mix the information …

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## [RPI GPIO Error Help](https://discourse.nodered.org/t/rpi-gpio-error-help/14914)

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**Author:** [@MNiehaus](https://discourse.nodered.org/u/MNiehaus)\
**Replies:** 5\
**Last updated:** [29 August 2019 18:49 UTC](https://discourse.nodered.org/t/rpi-gpio-error-help/14914 "2019-08-29T18:49:02Z")

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"nrpgio python command not running" Im trying to toggle an LED on/off using inject input w/ rpi gpio node. Im getting that error in the debug line. RPI.GPIO library is installed. Can you guys help..?

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## [Truck weight measurements with NODE RED](https://discourse.nodered.org/t/truck-weight-measurements-with-node-red/14463)

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**Author:** [@iungo](https://discourse.nodered.org/u/iungo)\
**Replies:** 11\
**Last updated:** [29 August 2019 17:50 UTC](https://discourse.nodered.org/t/truck-weight-measurements-with-node-red/14463 "2019-08-29T17:50:07Z")

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I'm developing an automated truck weight measurement system based on Node-Red. What I expected from this system: Truck numberplate recognition. Search truck data in the database. Automatically put truckload data to th…

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## [Help Writing My First Function](https://discourse.nodered.org/t/help-writing-my-first-function/14918)

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**Author:** [@MNiehaus](https://discourse.nodered.org/u/MNiehaus)\
**Replies:** 6\
**Last updated:** [29 August 2019 17:03 UTC](https://discourse.nodered.org/t/help-writing-my-first-function/14918 "2019-08-29T17:03:16Z")

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I could use some help getting my function to operate correctly. Here is my setup so far: rpi gpio node set up as a button pin input, looking for 1 or 0...This is linked to the email node. You push the button and get an e…

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## [Help with Formatting payload](https://discourse.nodered.org/t/help-with-formatting-payload/14920)

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**Author:** [@Exit2Studios](https://discourse.nodered.org/u/Exit2Studios)\
**Replies:** 0\
**Last updated:** [29 August 2019 16:32 UTC](https://discourse.nodered.org/t/help-with-formatting-payload/14920 "2019-08-29T16:32:20Z")

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I'm trying to use the following flow to control some relays on an Arduino Nano. I sort of understand how the function node is working (I didn't write it), but I'm at a bit of a loss when it comes to bitSet and bitClear …

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## [Update API endpoint to update a node in Node.RED server without restart](https://discourse.nodered.org/t/update-api-endpoint-to-update-a-node-in-node-red-server-without-restart/14859)

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**Author:** [@serardica](https://discourse.nodered.org/u/serardica)\
**Replies:** 4\
**Last updated:** [29 August 2019 15:38 UTC](https://discourse.nodered.org/t/update-api-endpoint-to-update-a-node-in-node-red-server-without-restart/14859 "2019-08-29T15:38:20Z")

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Hi guys! I was wondering if there a way of update a node through an API endpoint. i.e. I have a node already deployed on Node-RED and I perform a change in the html file, I want this change to be displayed without the …

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## [Problem in enabling projects](https://discourse.nodered.org/t/problem-in-enabling-projects/14913)

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**Author:** [@MarcMarc2006](https://discourse.nodered.org/u/MarcMarc2006)\
**Replies:** 11\
**Last updated:** [29 August 2019 15:20 UTC](https://discourse.nodered.org/t/problem-in-enabling-projects/14913 "2019-08-29T15:20:41Z")

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Hi, I am new to node-red and a am learning how to use it but I have a problem. In the node-red site it is written that to enable projects we have to modify the "settings.js" file. I found this file but when i want to op…

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## [Change the default msg.payload input by another property](https://discourse.nodered.org/t/change-the-default-msg-payload-input-by-another-property/14872)

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**Author:** [@doubleg](https://discourse.nodered.org/u/doubleg)\
**Replies:** 3\
**Last updated:** [29 August 2019 14:59 UTC](https://discourse.nodered.org/t/change-the-default-msg-payload-input-by-another-property/14872 "2019-08-29T14:59:56Z")

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This is a suggestion for many input nodes : For example I have an object like this : msg.payload.property1 = "1" msg.payload.property2 = "2" msg.payload.property3 = "3" ... And I want to fill 3 input text node with…

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## [Geo Fences in World Map](https://discourse.nodered.org/t/geo-fences-in-world-map/12401)

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**Author:** [@JhazMedina](https://discourse.nodered.org/u/JhazMedina)\
**Replies:** 4\
**Last updated:** [29 August 2019 14:59 UTC](https://discourse.nodered.org/t/geo-fences-in-world-map/12401 "2019-08-29T14:59:36Z")

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Hi everyone, I'm working with worldmap and geofences, is there any way to generate geofences in worldmap and get a reply from the map if my marker is inside or outside the geofence without using the Geofence node/module? …

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## [Calculate the difference between two times](https://discourse.nodered.org/t/calculate-the-difference-between-two-times/14911)

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**Author:** [@hathemi](https://discourse.nodered.org/u/hathemi)\
**Replies:** 1\
**Last updated:** [29 August 2019 14:47 UTC](https://discourse.nodered.org/t/calculate-the-difference-between-two-times/14911 "2019-08-29T14:47:09Z")

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is there a node that can determine the difference between a given time from and current time ? Or, should i need only a function node ?

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## [Now to add new expression to the expression list?](https://discourse.nodered.org/t/now-to-add-new-expression-to-the-expression-list/14896)

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**Author:** [@fangzhu](https://discourse.nodered.org/u/fangzhu)\
**Replies:** 5\
**Last updated:** [29 August 2019 13:44 UTC](https://discourse.nodered.org/t/now-to-add-new-expression-to-the-expression-list/14896 "2019-08-29T13:44:33Z")

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Some core nodes support expressions, such as debug, sort etc. I want to create my own node using similar method, and add my own expressions. Any examples to do that?

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## [Change node \> Delete from array (JSON)](https://discourse.nodered.org/t/change-node-delete-from-array-json/14559)

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**Author:** [@hobojoe720](https://discourse.nodered.org/u/hobojoe720)\
**Replies:** 8\
**Last updated:** [29 August 2019 12:45 UTC](https://discourse.nodered.org/t/change-node-delete-from-array-json/14559 "2019-08-29T12:45:33Z")

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Hey Guys, New to Node-Red so sorry if this is basic. I have a simple flow, that fetches from an API and the result is a JSON object which is summarised below. { "results": \[ {"url": "https://myurl", "id": 1}, …

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## [Message packages not working as I thought. MQTT](https://discourse.nodered.org/t/message-packages-not-working-as-i-thought-mqtt/14903)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 1\
**Last updated:** [29 August 2019 12:40 UTC](https://discourse.nodered.org/t/message-packages-not-working-as-i-thought-mqtt/14903 "2019-08-29T12:40:18Z")

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I am sending a message via MQTT and things aren't working as I thought. This is an example message I am sending: {"topic":"COMMAND\_REPLY/BedPi","payload":{"payload":"Command fail","device":"COMMAND\_REPLY/BedPi"},"qos":…

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## [Unable to find exec node](https://discourse.nodered.org/t/unable-to-find-exec-node/14898)

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**Author:** [@Chinmay](https://discourse.nodered.org/u/Chinmay)\
**Replies:** 3\
**Last updated:** [29 August 2019 11:50 UTC](https://discourse.nodered.org/t/unable-to-find-exec-node/14898 "2019-08-29T11:50:40Z")

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Sorry, this might be a very naive question. But unfortunately I am unable to figure it out. The problem is that, I have built a dashboard and for now I used the fake data, just to make sure that things work. But now I ne…

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