# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1290

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

**Page:** 1291

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## [Visual RSSI of wifi relay switch on the dashboard](https://discourse.nodered.org/t/visual-rssi-of-wifi-relay-switch-on-the-dashboard/10284)

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**Author:** [@weirdpraani](https://discourse.nodered.org/u/weirdpraani)\
**Replies:** 2\
**Last updated:** [17 April 2019 13:18 UTC](https://discourse.nodered.org/t/visual-rssi-of-wifi-relay-switch-on-the-dashboard/10284 "2019-04-17T13:18:27Z")

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Hi, I am very new to Node Red! I wanted to display the RSSI of my wifi relay switch as a meter in my dashboard but so far unable to as I could not get to the right topic i believe. Would appreciate if anyone can help m…

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## [How to add two text box input to a functon](https://discourse.nodered.org/t/how-to-add-two-text-box-input-to-a-functon/10151)

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**Author:** [@sachin](https://discourse.nodered.org/u/sachin)\
**Replies:** 25\
**Last updated:** [17 April 2019 12:27 UTC](https://discourse.nodered.org/t/how-to-add-two-text-box-input-to-a-functon/10151 "2019-04-17T12:27:49Z")

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how to add two text box input(number) to a functon and addition of two nuber and display it in another text box

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## [Upgrade broke node-red](https://discourse.nodered.org/t/upgrade-broke-node-red/10260)

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**Author:** [@Bigglesuk](https://discourse.nodered.org/u/Bigglesuk)\
**Replies:** 6\
**Last updated:** [17 April 2019 10:34 UTC](https://discourse.nodered.org/t/upgrade-broke-node-red/10260 "2019-04-17T10:34:20Z")

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hi. I upgraded NodeRed to v3 today and now i cant even get it to load up I only get this but nothing more loads. I've looked at the log and i'm getting a reference to a strange IP - 172.30.32.1 that i dont know but t…

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## [Download node modules(such as node-red-node-mysql) by using code](https://discourse.nodered.org/t/download-node-modules-such-as-node-red-node-mysql-by-using-code/10272)

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**Author:** [@qgc007](https://discourse.nodered.org/u/qgc007)\
**Replies:** 9\
**Last updated:** [17 April 2019 09:41 UTC](https://discourse.nodered.org/t/download-node-modules-such-as-node-red-node-mysql-by-using-code/10272 "2019-04-17T09:41:56Z")

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hello,everyone,i can use exec node to do something like remove a file in linux (example:rm xxx.txt), but it cant download a node module(like npm install node-red-node-mysql) have a good way to do that?

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## [How to implement a task scheduler?](https://discourse.nodered.org/t/how-to-implement-a-task-scheduler/10273)

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**Author:** [@elisascheer](https://discourse.nodered.org/u/elisascheer)\
**Replies:** 8\
**Last updated:** [17 April 2019 08:26 UTC](https://discourse.nodered.org/t/how-to-implement-a-task-scheduler/10273 "2019-04-17T08:26:46Z")

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Hi, To resume, I am working with a S7 PLC and I am aiming to retrieve periodic data and alarms from the S7, so I declared two S7 connectors : -one for periodic reading -one for alarm reading I also add a status no…

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## [Switch node issue](https://discourse.nodered.org/t/switch-node-issue/10266)

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**Author:** [@pixelview](https://discourse.nodered.org/u/pixelview)\
**Replies:** 5\
**Last updated:** [17 April 2019 08:25 UTC](https://discourse.nodered.org/t/switch-node-issue/10266 "2019-04-17T08:25:02Z")

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Hi, I'm trying to get the switch node to read in a json message from a sigfox callback and send a twillio message based on the data. The messages can be of 3 types: first type: { "data":"{c0}" } second type: { …

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## [Postgres+Listen/Notify](https://discourse.nodered.org/t/postgres-listen-notify/10269)

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**Author:** [@cfb](https://discourse.nodered.org/u/cfb)\
**Replies:** 1\
**Last updated:** [17 April 2019 04:42 UTC](https://discourse.nodered.org/t/postgres-listen-notify/10269 "2019-04-17T04:42:53Z")

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Hi, i've seen that node-red-contrib-postgres as been deprecated and not available for node-red v0.20, this also disable the node-red-contrib-postgres-listen node. Any way to enable these? or substitutes? Someone are …

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## [Wire heat map which can be controlled when creating node types](https://discourse.nodered.org/t/wire-heat-map-which-can-be-controlled-when-creating-node-types/10193)

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**Author:** [@peterprib](https://discourse.nodered.org/u/peterprib)\
**Replies:** 6\
**Last updated:** [17 April 2019 02:35 UTC](https://discourse.nodered.org/t/wire-heat-map-which-can-be-controlled-when-creating-node-types/10193 "2019-04-17T02:35:30Z")

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I wish to heat map a wire to reflect its usage either by thickness or color via a node. Is this possible. Wish to take metrics and in input adjust colors of attached wires. See other benefits such as visually tracing…

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## [Store data in flow variable to be used in another node (in Python3 function)](https://discourse.nodered.org/t/store-data-in-flow-variable-to-be-used-in-another-node-in-python3-function/10217)

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**Author:** [@xoani](https://discourse.nodered.org/u/xoani)\
**Replies:** 8\
**Last updated:** [17 April 2019 00:46 UTC](https://discourse.nodered.org/t/store-data-in-flow-variable-to-be-used-in-another-node-in-python3-function/10217 "2019-04-17T00:46:25Z")

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Hello everyone. I am trying to save the name of a file into a variable so that I can call it in another function node later. I have read that there is a flow variable that is available in the flow scope, which is what I…

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## [Use an object with a hyphen in a function](https://discourse.nodered.org/t/use-an-object-with-a-hyphen-in-a-function/10257)

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**Author:** [@gbomacfly](https://discourse.nodered.org/u/gbomacfly)\
**Replies:** 9\
**Last updated:** [16 April 2019 22:19 UTC](https://discourse.nodered.org/t/use-an-object-with-a-hyphen-in-a-function/10257 "2019-04-16T22:19:30Z")

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Hello all, I have a problem with a function in node-red. I want to read an object of the instance spotify-premium. The problem is the hyphen in the name. The path I would like to read is: spotify-premium.0.player.isPl…

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## [Worldmap how to send several Markers](https://discourse.nodered.org/t/worldmap-how-to-send-several-markers/10197)

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**Author:** [@MrDmx1024](https://discourse.nodered.org/u/MrDmx1024)\
**Replies:** 7\
**Last updated:** [16 April 2019 21:54 UTC](https://discourse.nodered.org/t/worldmap-how-to-send-several-markers/10197 "2019-04-16T21:54:54Z")

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Does anybody have an example of how to send several locations to the worldmap node? Say I wanted to populate the map with 10 markers. I have the formatting working for one location no problem but do not see any info on…

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## [Node-red will not start after NPM installation](https://discourse.nodered.org/t/node-red-will-not-start-after-npm-installation/7785)

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**Author:** [@Rulevalley](https://discourse.nodered.org/u/Rulevalley)\
**Replies:** 3\
**Last updated:** [16 April 2019 21:46 UTC](https://discourse.nodered.org/t/node-red-will-not-start-after-npm-installation/7785 "2019-04-16T21:46:16Z")

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Hi. I have installed a NPM - node-red-contrib-sonoff-server. After that it all crashed. When I start up it now just stops as listed below. \*\* pi@raspberrypi:~ $ node-red 10 Feb 01:20:06 - \[info\] Welcome to Node-RED …

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## [Multiple Sensor Data Using Arduino](https://discourse.nodered.org/t/multiple-sensor-data-using-arduino/10206)

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**Author:** [@maverick](https://discourse.nodered.org/u/maverick)\
**Replies:** 9\
**Last updated:** [16 April 2019 20:35 UTC](https://discourse.nodered.org/t/multiple-sensor-data-using-arduino/10206 "2019-04-16T20:35:31Z")

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Hi, I am trying to interface dht11 sensor in arduino and trying to read it in serial monitor in node red. The "split node" is working fine, but after that the "Payload Object Sensor" function is not working. Please reso…

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## [Need help with design for my home flow](https://discourse.nodered.org/t/need-help-with-design-for-my-home-flow/10263)

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**Author:** [@aihysp](https://discourse.nodered.org/u/aihysp)\
**Replies:** 0\
**Last updated:** [16 April 2019 20:26 UTC](https://discourse.nodered.org/t/need-help-with-design-for-my-home-flow/10263 "2019-04-16T20:26:49Z")

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Hi All i am using NR + Openhab for a long time , i use NR+mosquito as my MQTT Broker and OH only saves my values(maybe little stupid but working :slight\_smile: ) i am using this simple flow to pass values between MQT…

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## [Read node data from node-info pane](https://discourse.nodered.org/t/read-node-data-from-node-info-pane/10210)

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**Author:** [@Holger-Will](https://discourse.nodered.org/u/Holger-Will)\
**Replies:** 8\
**Last updated:** [16 April 2019 17:14 UTC](https://discourse.nodered.org/t/read-node-data-from-node-info-pane/10210 "2019-04-16T17:14:30Z")

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i'm currently writing a node to bring enocean to node-red. enocean is an iot protocol. I'm facing following problem: enocean telegrams come in different encodings. to know wich encoding is use by a device, it can send …

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## [Read data from TCP/IP port](https://discourse.nodered.org/t/read-data-from-tcp-ip-port/10185)

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**Author:** [@JD2010](https://discourse.nodered.org/u/JD2010)\
**Replies:** 7\
**Last updated:** [16 April 2019 16:42 UTC](https://discourse.nodered.org/t/read-data-from-tcp-ip-port/10185 "2019-04-16T16:42:07Z")

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HI, I want to ask you the next one: I have a datalogger for temperature and I want to read the data with Node-Red. How Can I do to read data form TCP/IP?

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## [How to autmoatically increase a percentage value using start and stop triggers](https://discourse.nodered.org/t/how-to-autmoatically-increase-a-percentage-value-using-start-and-stop-triggers/10233)

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**Author:** [@zaphood](https://discourse.nodered.org/u/zaphood)\
**Replies:** 15\
**Last updated:** [16 April 2019 16:19 UTC](https://discourse.nodered.org/t/how-to-autmoatically-increase-a-percentage-value-using-start-and-stop-triggers/10233 "2019-04-16T16:19:23Z")

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Hi there, I am looking for a way to do the following: Input node is numeric, delivers either a "1" for begin or a "0" for stop (like pressing a button triggers the "1", while releasing it sends the "0"). Output node e…

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## [This.context().flow does not work?](https://discourse.nodered.org/t/this-context-flow-does-not-work/10252)

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**Author:** [@stefanopog](https://discourse.nodered.org/u/stefanopog)\
**Replies:** 0\
**Last updated:** [16 April 2019 14:43 UTC](https://discourse.nodered.org/t/this-context-flow-does-not-work/10252 "2019-04-16T14:43:18Z")

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I have the following three test lines in my CUSTOM NODE: let camo = node.context(); let zorro = node.context().flow; let zorro2 = node.context().global; Using VSCode Debugger, camo and zorro2 have values,…

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## [Duplicating dashboard nodes to new tab](https://discourse.nodered.org/t/duplicating-dashboard-nodes-to-new-tab/10237)

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**Author:** [@GregorR1](https://discourse.nodered.org/u/GregorR1)\
**Replies:** 4\
**Last updated:** [16 April 2019 13:04 UTC](https://discourse.nodered.org/t/duplicating-dashboard-nodes-to-new-tab/10237 "2019-04-16T13:04:20Z")

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Looking for a simple way to duplicate dashboard nodes to a new tab. Currently, if I duplicate the nodes it just adds them into the same tab meaning I need to change each one individually - this will become very time con…

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## [Limit ui\_text\_input](https://discourse.nodered.org/t/limit-ui-text-input/10235)

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**Author:** [@podi62](https://discourse.nodered.org/u/podi62)\
**Replies:** 3\
**Last updated:** [16 April 2019 11:27 UTC](https://discourse.nodered.org/t/limit-ui-text-input/10235 "2019-04-16T11:27:24Z")

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Looked for examples but couldn't find any. How can I limit the input of a ui\_text\_input numeric field to only positive numbers ? If you use the 2 small up/down you can go from 0 to negative numbers.

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## [POST request to Traccar demoserver](https://discourse.nodered.org/t/post-request-to-traccar-demoserver/10219)

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**Author:** [@greyser](https://discourse.nodered.org/u/greyser)\
**Replies:** 3\
**Last updated:** [16 April 2019 11:15 UTC](https://discourse.nodered.org/t/post-request-to-traccar-demoserver/10219 "2019-04-16T11:15:28Z")

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Hello guys! Trying to get geo info fron Traccar demo server via POST request. Trying http request node and get mistake: \> The @FormParam is utilized when the content type of the request entity is not application/x-www…

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## [Help needed with pusher chatkit](https://discourse.nodered.org/t/help-needed-with-pusher-chatkit/9953)

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**Author:** [@RogierQ](https://discourse.nodered.org/u/RogierQ)\
**Replies:** 2\
**Last updated:** [16 April 2019 10:42 UTC](https://discourse.nodered.org/t/help-needed-with-pusher-chatkit/9953 "2019-04-16T10:42:33Z")

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Is there some one who can help me to implement the pusher chatkit in Node Red? I found a pusher node but that does not support the chatkit... What i need to do is send and receive messages to an app on an iphone More …

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## [Gauge sectors change in dashboard](https://discourse.nodered.org/t/gauge-sectors-change-in-dashboard/10017)

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**Author:** [@JokinSegu](https://discourse.nodered.org/u/JokinSegu)\
**Replies:** 13\
**Last updated:** [16 April 2019 09:39 UTC](https://discourse.nodered.org/t/gauge-sectors-change-in-dashboard/10017 "2019-04-16T09:39:12Z")

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The Gauge sectors can be set from the dashboard? The gaude can be divided into three parts with different colours and I have numeric nodes for the maximum an minimum values. And I want to change the sectors depending on…

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## [Node-red-contrib-modbus Server read/write](https://discourse.nodered.org/t/node-red-contrib-modbus-server-read-write/10160)

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**Author:** [@ABNodered](https://discourse.nodered.org/u/ABNodered)\
**Replies:** 3\
**Last updated:** [16 April 2019 08:34 UTC](https://discourse.nodered.org/t/node-red-contrib-modbus-server-read-write/10160 "2019-04-16T08:34:11Z")

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I am using the Modbus server node to simulate a modbus controller for 13 air handling units The controller has 1 IP address and each air handling unit has its own unit ID (1-13) I am using the Modbus write node to forc…

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## [Save payload in a local file, then set as output of the file node the name of the file and not the payload?](https://discourse.nodered.org/t/save-payload-in-a-local-file-then-set-as-output-of-the-file-node-the-name-of-the-file-and-not-the-payload/10020)

<div class="topic-metadata">

**Author:** [@xoani](https://discourse.nodered.org/u/xoani)\
**Replies:** 2\
**Last updated:** [16 April 2019 08:18 UTC](https://discourse.nodered.org/t/save-payload-in-a-local-file-then-set-as-output-of-the-file-node-the-name-of-the-file-and-not-the-payload/10020 "2019-04-16T08:18:38Z")

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I am trying to send data to the Azure Blob Storage service. In the future this data should be sent every 5 seconds but at the moment I am trying to keep it simple. So, here is what I know (I am a beginner): Part 1 : I…

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## [Multiple outputs from Function node](https://discourse.nodered.org/t/multiple-outputs-from-function-node/10204)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 10\
**Last updated:** [16 April 2019 08:12 UTC](https://discourse.nodered.org/t/multiple-outputs-from-function-node/10204 "2019-04-16T08:12:54Z")

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I'm getting an error saying: ReferenceError: msg1 is not defined (line 56, col 9) I've used multiple message outputs before and this is the second attempt at getting it to work. so I am not understanding what is gonig…

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## [Cant remove node-red-contrib-generic-ble: "Solved"](https://discourse.nodered.org/t/cant-remove-node-red-contrib-generic-ble-solved/10184)

<div class="topic-metadata">

**Author:** [@kenkoknz](https://discourse.nodered.org/u/kenkoknz)\
**Replies:** 8\
**Last updated:** [16 April 2019 08:06 UTC](https://discourse.nodered.org/t/cant-remove-node-red-contrib-generic-ble-solved/10184 "2019-04-16T08:06:09Z")

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Hi, I installed node-red-contrib-generic-ble from the palette, but now cannot uninstall it. Advice will be appreciated. When I open NR now I get: I have deleted all the flows with the ble nodes and even deleted the …

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## [How to store different function output in a single array or buffer](https://discourse.nodered.org/t/how-to-store-different-function-output-in-a-single-array-or-buffer/10162)

<div class="topic-metadata">

**Author:** [@sachin](https://discourse.nodered.org/u/sachin)\
**Replies:** 16\
**Last updated:** [16 April 2019 07:49 UTC](https://discourse.nodered.org/t/how-to-store-different-function-output-in-a-single-array-or-buffer/10162 "2019-04-16T07:49:39Z")

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how to store different founcton output in a single array array or buffer

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## [Dashboard chart will only display last few minutes](https://discourse.nodered.org/t/dashboard-chart-will-only-display-last-few-minutes/9863)

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**Author:** [@JonHeron](https://discourse.nodered.org/u/JonHeron)\
**Replies:** 24\
**Last updated:** [16 April 2019 07:43 UTC](https://discourse.nodered.org/t/dashboard-chart-will-only-display-last-few-minutes/9863 "2019-04-16T07:43:48Z")

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RPI 3b+ NPM V 1.4.21 Node-RED version: v0.19.4 Node.js version: v8.11.1 Linux 4.14.98-v7+ arm LE Dashboard version 2.9.4 I have had a flow controlling my greenhouse for over a year now and the temperature chart wa…

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## [Reading GPS data from MySQL to plot on World map](https://discourse.nodered.org/t/reading-gps-data-from-mysql-to-plot-on-world-map/10195)

<div class="topic-metadata">

**Author:** [@Greenprotocol](https://discourse.nodered.org/u/Greenprotocol)\
**Replies:** 5\
**Last updated:** [16 April 2019 07:00 UTC](https://discourse.nodered.org/t/reading-gps-data-from-mysql-to-plot-on-world-map/10195 "2019-04-16T07:00:49Z")

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Hey everyone, I have the following flow: GPS Tracker provides data, change node changes keys into Worldmap format, Insert that data into a Mysql db and plot on Worldmap. Works no problem. I want to read the db recor…

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