# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=924

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

**Page:** 925

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## [H801 rgbww node](https://discourse.nodered.org/t/h801-rgbww-node/6423)

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**Author:** [@nick](https://discourse.nodered.org/u/nick)\
**Replies:** 0\
**Last updated:** [5 January 2019 15:15 UTC](https://discourse.nodered.org/t/h801-rgbww-node/6423 "2019-01-05T15:15:16Z")

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can somebody tell me what i am doing wrong withe the h801 node? the value of the rgbww are not comming trough to the node. \[{"id":"87139c06.d08d5","type":"ui\_colour\_picker","z":"945180fe.d41cc","name":"","label":"","gr…

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## [Azure IoT Hub data formatting](https://discourse.nodered.org/t/azure-iot-hub-data-formatting/5718)

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**Author:** [@KMBN](https://discourse.nodered.org/u/KMBN)\
**Replies:** 1\
**Last updated:** [5 January 2019 11:24 UTC](https://discourse.nodered.org/t/azure-iot-hub-data-formatting/5718 "2019-01-05T11:24:48Z")

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I have just started using Node-RED, and am excited to get it to solve some tasks for me. I have attempted to connect to Azure IoT Hub, and have succeeded in doing so. But it seems like too much data is being generated, …

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## [Accessing two serial ports simultaneously](https://discourse.nodered.org/t/accessing-two-serial-ports-simultaneously/6393)

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**Author:** [@gsr](https://discourse.nodered.org/u/gsr)\
**Replies:** 4\
**Last updated:** [5 January 2019 09:15 UTC](https://discourse.nodered.org/t/accessing-two-serial-ports-simultaneously/6393 "2019-01-05T09:15:01Z")

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Hi, How to configure node-red for two serial ports?

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## [Sharepoint library](https://discourse.nodered.org/t/sharepoint-library/6284)

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**Author:** [@olab](https://discourse.nodered.org/u/olab)\
**Replies:** 11\
**Last updated:** [5 January 2019 08:46 UTC](https://discourse.nodered.org/t/sharepoint-library/6284 "2019-01-05T08:46:48Z")

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Hi, I'm quite new in Node-red... Is there a way to access an excel file located in a sharepoint library and poll data from it into a Node-red flow?

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## [Return triggers Maximum call stack size](https://discourse.nodered.org/t/return-triggers-maximum-call-stack-size/6368)

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**Author:** [@jboutwell](https://discourse.nodered.org/u/jboutwell)\
**Replies:** 9\
**Last updated:** [4 January 2019 21:59 UTC](https://discourse.nodered.org/t/return-triggers-maximum-call-stack-size/6368 "2019-01-04T21:59:18Z")

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Hello, I am consistently getting a : "RangeError: Maximum call stack size exceeded" error that crashes node.red when I send a " return \[null, msg\]" The code is checking to see if a global variable timestamp hasn't been…

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## [Passing an input to exec node which execute a python script](https://discourse.nodered.org/t/passing-an-input-to-exec-node-which-execute-a-python-script/5763)

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**Author:** [@s.kh](https://discourse.nodered.org/u/s.kh)\
**Replies:** 11\
**Last updated:** [4 January 2019 21:16 UTC](https://discourse.nodered.org/t/passing-an-input-to-exec-node-which-execute-a-python-script/5763 "2019-01-04T21:16:45Z")

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hi , i have a python script (.py) which i can execute in node-red easily. but i need to pass a json string to my python script as an input. in another word the python script which is on my local drive should read the in…

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## [HTTP Response Timeout](https://discourse.nodered.org/t/http-response-timeout/6400)

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**Author:** [@Lee](https://discourse.nodered.org/u/Lee)\
**Replies:** 1\
**Last updated:** [4 January 2019 19:59 UTC](https://discourse.nodered.org/t/http-response-timeout/6400 "2019-01-04T19:59:54Z")

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I have an http request going to a third party API. I am getting a timeout error on the response. "Session has timed out. Please login again." When I do the same request, same headers, using Postman, the call returns d…

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## [Missing info on the join](https://discourse.nodered.org/t/missing-info-on-the-join/565)

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**Author:** [@Jakeiscrazy](https://discourse.nodered.org/u/Jakeiscrazy)\
**Replies:** 14\
**Last updated:** [15 July 2018 05:51 UTC](https://discourse.nodered.org/t/missing-info-on-the-join/565 "2018-07-15T05:51:39Z")

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So here is a weird one. When I drop a join component into a flow it’s coming up as join.join and it’s missing info. Any idea what’s wrong here? \[140\]

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## [How to convert to a function](https://discourse.nodered.org/t/how-to-convert-to-a-function/6170)

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**Author:** [@gbond](https://discourse.nodered.org/u/gbond)\
**Replies:** 92\
**Last updated:** [4 January 2019 17:37 UTC](https://discourse.nodered.org/t/how-to-convert-to-a-function/6170 "2019-01-04T17:37:04Z")

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can anyone tell me how i would convert this in to a function so I can set varibles for the tigger times and delays etc? \[{"id":"3640f1c3.dbf8de","type":"trigger","z":"ff81c2c4.ef9ce8","op1":"true","op2":"false","op1type…

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## [\[red\] Uncaught Exception - node-red-contrib-netatmo-dasboard](https://discourse.nodered.org/t/red-uncaught-exception-node-red-contrib-netatmo-dasboard/6398)

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**Author:** [@JoseGodinho](https://discourse.nodered.org/u/JoseGodinho)\
**Replies:** 4\
**Last updated:** [4 January 2019 17:23 UTC](https://discourse.nodered.org/t/red-uncaught-exception-node-red-contrib-netatmo-dasboard/6398 "2019-01-04T17:23:21Z")

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Hello All Regarding the print screen attached of the \[red\] is there any suggestions to fix it ... I , As a traversal analysis I would suggest that we could have some way to report and support the the node developers…

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## [Table like input](https://discourse.nodered.org/t/table-like-input/6391)

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**Author:** [@jjrivasescola](https://discourse.nodered.org/u/jjrivasescola)\
**Replies:** 2\
**Last updated:** [4 January 2019 15:32 UTC](https://discourse.nodered.org/t/table-like-input/6391 "2019-01-04T15:32:48Z")

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Hello forum people, I´m not an expert in Node Red, so maybe you could help me. Thanks in advance!! I would like to work with the following input received from a table from an email : The main program will work at th…

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## [P2P communication](https://discourse.nodered.org/t/p2p-communication/6376)

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**Author:** [@cpaolojo](https://discourse.nodered.org/u/cpaolojo)\
**Replies:** 2\
**Last updated:** [4 January 2019 14:01 UTC](https://discourse.nodered.org/t/p2p-communication/6376 "2019-01-04T14:01:41Z")

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hi all and Happy New year. I would establish a communication between Rpi and a smartphone. In other word I would control some input/output connected to Rpi using node-red dashboard displayed in the smartphone. To do th…

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## [OneWire sensors on Windows PC](https://discourse.nodered.org/t/onewire-sensors-on-windows-pc/6358)

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**Author:** [@rowan.bradley](https://discourse.nodered.org/u/rowan.bradley)\
**Replies:** 2\
**Last updated:** [4 January 2019 09:48 UTC](https://discourse.nodered.org/t/onewire-sensors-on-windows-pc/6358 "2019-01-04T09:48:18Z")

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I'm just getting started with Node-Red (on Windows 8.1). I have several DS19B20 temperature sensors interfaced to the PC via a DS9490R OneWire to USB device. How do I get Node-Red to read the temperatures from these sens…

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## [Why am I getting garbage in payload?](https://discourse.nodered.org/t/why-am-i-getting-garbage-in-payload/6060)

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**Author:** [@Bazmundi](https://discourse.nodered.org/u/Bazmundi)\
**Replies:** 10\
**Last updated:** [4 January 2019 08:37 UTC](https://discourse.nodered.org/t/why-am-i-getting-garbage-in-payload/6060 "2019-01-04T08:37:08Z")

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I have node-red v0.19.3 running on armbian on an orangepi zero. I have a snap of mosquitto running on the orangepi zero, so it is running default settings with no fiddling by me. I have a WEMOS D1 R2 MINI as client. I…

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## [Segmentation fault trying to start node-red on a Raspberry Pi 3](https://discourse.nodered.org/t/segmentation-fault-trying-to-start-node-red-on-a-raspberry-pi-3/6329)

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**Author:** [@ron](https://discourse.nodered.org/u/ron)\
**Replies:** 5\
**Last updated:** [3 January 2019 21:00 UTC](https://discourse.nodered.org/t/segmentation-fault-trying-to-start-node-red-on-a-raspberry-pi-3/6329 "2019-01-03T21:00:18Z")

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Hi, My node-red installation was running just fine, until I had to reboot the Raspberry Pi where it was installed on. I did a sudo reboot and after the pi restarted, node-red didn't start automatically like I had config…

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## [Newbie: How to parse temperature data from Sonoff TH10](https://discourse.nodered.org/t/newbie-how-to-parse-temperature-data-from-sonoff-th10/5999)

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**Author:** [@CraigW](https://discourse.nodered.org/u/CraigW)\
**Replies:** 3\
**Last updated:** [3 January 2019 20:40 UTC](https://discourse.nodered.org/t/newbie-how-to-parse-temperature-data-from-sonoff-th10/5999 "2019-01-03T20:40:07Z")

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Have a node red flow successfully processing 16 Sonoff basics {Tasmota firmware} with Pete Scargill's Big Timer on a RPi and it works perfectly. The dashboard for these Sonoffs also works fine. I am now beyond my expert…

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## [Trying to upgrade NR v0.19.4 to v0.20.0-beta.2 on a RPi-Zero-W](https://discourse.nodered.org/t/trying-to-upgrade-nr-v0-19-4-to-v0-20-0-beta-2-on-a-rpi-zero-w/6366)

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**Author:** [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Replies:** 6\
**Last updated:** [3 January 2019 20:37 UTC](https://discourse.nodered.org/t/trying-to-upgrade-nr-v0-19-4-to-v0-20-0-beta-2-on-a-rpi-zero-w/6366 "2019-01-03T20:37:50Z")

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Hi, I'm trying to upgrade a fresh copy of NR on a Raspberry Pi-Zero-W. My first step is trying to get npm (v1.4.21) upgraded to the latest version (v6.4.1 ????). When I use... npm install -g npm@next I get loads of…

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## [Newbie here using Hassio](https://discourse.nodered.org/t/newbie-here-using-hassio/6362)

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**Author:** [@Derekwit](https://discourse.nodered.org/u/Derekwit)\
**Replies:** 1\
**Last updated:** [3 January 2019 17:53 UTC](https://discourse.nodered.org/t/newbie-here-using-hassio/6362 "2019-01-03T17:53:52Z")

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I am trying to get some directions or guidance on how to setup some automations in Node Red that will work in Hassio. I have been stumbling through yaml and made a couple of automations that worked and now are no longer…

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## [Help substituting value](https://discourse.nodered.org/t/help-substituting-value/6354)

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**Author:** [@Dave](https://discourse.nodered.org/u/Dave)\
**Replies:** 3\
**Last updated:** [3 January 2019 17:15 UTC](https://discourse.nodered.org/t/help-substituting-value/6354 "2019-01-03T17:15:34Z")

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I have a function node with the following : msg.payload='{"state":"ON","brightness":250,"color\_temp":250,"bulb\_mode":"white","color":{"r":255,"g":255,"b":255}}'; return msg; It works fine but I am totally stumped, how…

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## [Change a val into a number](https://discourse.nodered.org/t/change-a-val-into-a-number/6348)

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**Author:** [@cabriopuma](https://discourse.nodered.org/u/cabriopuma)\
**Replies:** 5\
**Last updated:** [3 January 2019 14:54 UTC](https://discourse.nodered.org/t/change-a-val-into-a-number/6348 "2019-01-03T14:54:30Z")

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Hello i try to change the Season names into a Number but didn't work. So maybe some have an Idea. Thank you for any kind of help.

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## [Mssql connection close](https://discourse.nodered.org/t/mssql-connection-close/6316)

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**Author:** [@akhilendharreddy](https://discourse.nodered.org/u/akhilendharreddy)\
**Replies:** 2\
**Last updated:** [2 January 2019 14:48 UTC](https://discourse.nodered.org/t/mssql-connection-close/6316 "2019-01-02T14:48:23Z")

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i am trying to connect mssql my config { user: "username", password: "password", server: "10.0. . ", port:1433, database:"dbname", options: { encrypt: false }} this is my config this mssql db has external connec…

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## [Node red and Home assistant](https://discourse.nodered.org/t/node-red-and-home-assistant/6293)

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**Author:** [@debouttek](https://discourse.nodered.org/u/debouttek)\
**Replies:** 3\
**Last updated:** [2 January 2019 10:08 UTC](https://discourse.nodered.org/t/node-red-and-home-assistant/6293 "2019-01-02T10:08:08Z")

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I would like to integrate Home Assistant in my Node red. Do I need a second raspberry pi where I instal hassio on?

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## [High Availability failover cluster](https://discourse.nodered.org/t/high-availability-failover-cluster/6215)

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**Author:** [@fraser](https://discourse.nodered.org/u/fraser)\
**Replies:** 15\
**Last updated:** [1 January 2019 14:47 UTC](https://discourse.nodered.org/t/high-availability-failover-cluster/6215 "2019-01-01T14:47:08Z")

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Does anyone have any suggestions for how to operate Node Red on a couple of Pis in some sort of failover cluster? - my home automation pi died the day I went away for Christmas, with obviously irritating consequences...

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## [File-function context/flow/global missing](https://discourse.nodered.org/t/file-function-context-flow-global-missing/6278)

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**Author:** [@SynAckFin](https://discourse.nodered.org/u/SynAckFin)\
**Replies:** 1\
**Last updated:** [1 January 2019 13:18 UTC](https://discourse.nodered.org/t/file-function-context-flow-global-missing/6278 "2019-01-01T13:18:28Z")

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I'm using the file-function node and I'm having issues accessing data stored in context/flow/global stores When I execute the following within the file: console.log(flow.keys()); I get the following error: \[warn\] \[fi…

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## [Upgrade on raspberry pi failed](https://discourse.nodered.org/t/upgrade-on-raspberry-pi-failed/6266)

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**Author:** [@ScottChapman](https://discourse.nodered.org/u/ScottChapman)\
**Replies:** 2\
**Last updated:** [1 January 2019 10:49 UTC](https://discourse.nodered.org/t/upgrade-on-raspberry-pi-failed/6266 "2019-01-01T10:49:05Z")

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So, I was using the recommended method for upgrading node-red on my raspberry pi: https://nodered.org/docs/hardware/raspberrypi but it failed to install nodejs for armv6. looking at the log I see this: /usr/lib/node\_m…

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## [Setting property of nodes within subflow nodes?](https://discourse.nodered.org/t/setting-property-of-nodes-within-subflow-nodes/6265)

<div class="topic-metadata">

**Author:** [@3v0](https://discourse.nodered.org/u/3v0)\
**Replies:** 2\
**Last updated:** [1 January 2019 02:32 UTC](https://discourse.nodered.org/t/setting-property-of-nodes-within-subflow-nodes/6265 "2019-01-01T02:32:24Z")

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Hi, New here. Is there a way to set the node properties of nodes contained by subflows, such that the node property value is specific to the calling flow. Subflow instance specific. I have created a subflow to monitor…

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## [Setting flow context not working?](https://discourse.nodered.org/t/setting-flow-context-not-working/6245)

<div class="topic-metadata">

**Author:** [@ScottChapman](https://discourse.nodered.org/u/ScottChapman)\
**Replies:** 10\
**Last updated:** [31 December 2018 15:45 UTC](https://discourse.nodered.org/t/setting-flow-context-not-working/6245 "2018-12-31T15:45:26Z")

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First of all I am running 0.16.2 (running on Jessie raspberry pi) I have a flow that has a change node where I set a property on the flow context. This doesn't appear to be getting set (as far as I can tell). To test i…

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## [Frequent "Lost Connection" on wired LAN](https://discourse.nodered.org/t/frequent-lost-connection-on-wired-lan/6241)

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**Author:** [@rjdelbueno](https://discourse.nodered.org/u/rjdelbueno)\
**Replies:** 5\
**Last updated:** [31 December 2018 14:47 UTC](https://discourse.nodered.org/t/frequent-lost-connection-on-wired-lan/6241 "2018-12-31T14:47:16Z")

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I am running Node-Red on a raspberryPi. The Pi is connected to local LAN via wired ethernet. Other computers on the same LAN (also wired via ethernet) access the Pi's NR dashboard UI via LAN. Quite often, when viewing th…

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## [Manage flows synchronous](https://discourse.nodered.org/t/manage-flows-synchronous/6250)

<div class="topic-metadata">

**Author:** [@akhilendharreddy](https://discourse.nodered.org/u/akhilendharreddy)\
**Replies:** 2\
**Last updated:** [31 December 2018 09:59 UTC](https://discourse.nodered.org/t/manage-flows-synchronous/6250 "2018-12-31T09:59:06Z")

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I have 5 flows in my project, i have to invoke my flows in such a way that if first flow complete then start next flow, how can i achieve this?

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## [Buffer and env variable](https://discourse.nodered.org/t/buffer-and-env-variable/6252)

<div class="topic-metadata">

**Author:** [@Rahul\_Mathavan](https://discourse.nodered.org/u/Rahul_Mathavan)\
**Replies:** 1\
**Last updated:** [31 December 2018 09:36 UTC](https://discourse.nodered.org/t/buffer-and-env-variable/6252 "2018-12-31T09:36:23Z")

</div>

What is the use of buffer and env variable in the inject node,where can I use them

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