# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1152

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

**Page:** 1153

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## [home assistant running behind reverse proxy, Node Red add-on not working.](https://discourse.nodered.org/t/home-assistant-running-behind-reverse-proxy-node-red-add-on-not-working/22154)

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**Author:** [@rochford77](https://discourse.nodered.org/u/rochford77)\
**Replies:** 0\
**Last updated:** [23 February 2020 15:46 UTC](https://discourse.nodered.org/t/home-assistant-running-behind-reverse-proxy-node-red-add-on-not-working/22154 "2020-02-23T15:46:56Z")

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I am running homeassistant on my ubuntu server. that same server has a VM (different internal IP) that I run NGINX and lets-encrypt (installed myself, not through HASS add-on store) on with a reverse proxy for redirectin…

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## [Possible solution for split-choose-insert into DB](https://discourse.nodered.org/t/possible-solution-for-split-choose-insert-into-db/22150)

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**Author:** [@gbuurman](https://discourse.nodered.org/u/gbuurman)\
**Replies:** 1\
**Last updated:** [23 February 2020 15:43 UTC](https://discourse.nodered.org/t/possible-solution-for-split-choose-insert-into-db/22150 "2020-02-23T15:43:04Z")

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Hi all, Hereby a possible solution for: receiving a msg from an external server change format into JSON split the msg choose which SQL statement has to be executed extract the statement from msg send it to a DB a…

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## [Onion Omega Project](https://discourse.nodered.org/t/onion-omega-project/22151)

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**Author:** [@gbuurman](https://discourse.nodered.org/u/gbuurman)\
**Replies:** 0\
**Last updated:** [23 February 2020 15:12 UTC](https://discourse.nodered.org/t/onion-omega-project/22151 "2020-02-23T15:12:14Z")

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Hi all, is there somebody already working with the Onion omega Pro chip ? Regards

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## [Msg split, choose option and MySQL select](https://discourse.nodered.org/t/msg-split-choose-option-and-mysql-select/21831)

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**Author:** [@gbuurman](https://discourse.nodered.org/u/gbuurman)\
**Replies:** 44\
**Last updated:** [23 February 2020 15:08 UTC](https://discourse.nodered.org/t/msg-split-choose-option-and-mysql-select/21831 "2020-02-23T15:08:42Z")

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Need extra help for the following MSG Split I want to split a msg based on the 0x20 character. The msg is a standard text string coming from a soapserver Choose Next to that, I need to choose a route based on the first …

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## [Https://nodered.nodered.io/ui](https://discourse.nodered.org/t/https-nodered-nodered-io-ui/22071)

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**Author:** [@gbuurman](https://discourse.nodered.org/u/gbuurman)\
**Replies:** 9\
**Last updated:** [23 February 2020 13:04 UTC](https://discourse.nodered.org/t/https-nodered-nodered-io-ui/22071 "2020-02-23T13:04:01Z")

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https://nodered.nodered.io/ui doesn't give any response I even got a Safari can't find the page .... I have created a dashboard with items but nothing comes up. Regards Ger

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## [Error : node not deployed](https://discourse.nodered.org/t/error-node-not-deployed/22029)

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**Author:** [@DidierWindey](https://discourse.nodered.org/u/DidierWindey)\
**Replies:** 5\
**Last updated:** [23 February 2020 12:35 UTC](https://discourse.nodered.org/t/error-node-not-deployed/22029 "2020-02-23T12:35:24Z")

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Suddenly Node-red gives a problem on deploying after even the smallest editing on a flow. Giving 'error: node not deployed' and the dashboard does not start (only the start screen with the Node Red logo). On deploying …

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## [How to: RTSP to Chromecast](https://discourse.nodered.org/t/how-to-rtsp-to-chromecast/21087)

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**Author:** [@Gleneroo](https://discourse.nodered.org/u/Gleneroo)\
**Replies:** 32\
**Last updated:** [23 February 2020 11:33 UTC](https://discourse.nodered.org/t/how-to-rtsp-to-chromecast/21087 "2020-02-23T11:33:32Z")

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Hello I am new and I have only one simple flow behind me (receive an http rquest, speak, on a case-by-case basis, some sentences on google home. In my home I have surveillance cameras. I can get the video with an rtsp…

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## [Generate node from sub-flow?](https://discourse.nodered.org/t/generate-node-from-sub-flow/22120)

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**Author:** [@rei\_vilo](https://discourse.nodered.org/u/rei_vilo)\
**Replies:** 2\
**Last updated:** [23 February 2020 10:47 UTC](https://discourse.nodered.org/t/generate-node-from-sub-flow/22120 "2020-02-23T10:47:49Z")

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Is there a utility similar to node-red-nodegen (generate node from function) but to generate node out of a sub-flow? I am using Node-RED to develop a series of sub-flows. The FUI is very handy to test and debug them. No…

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## [Serial In Node - TXD Serial, 5V TTL Level into Pi 3b](https://discourse.nodered.org/t/serial-in-node-txd-serial-5v-ttl-level-into-pi-3b/22129)

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**Author:** [@beginnergeorge](https://discourse.nodered.org/u/beginnergeorge)\
**Replies:** 0\
**Last updated:** [23 February 2020 10:52 UTC](https://discourse.nodered.org/t/serial-in-node-txd-serial-5v-ttl-level-into-pi-3b/22129 "2020-02-23T10:52:43Z")

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Hi everyone, thanks for looking and any help available. I'm a newbie so apologies for any errors I make. BTW LOVING node-red, unfortunately it has sparked a flurry of potential "projects"... I'm trying to read data from…

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## [Put labels on Y-Axis Dashboard Graph](https://discourse.nodered.org/t/put-labels-on-y-axis-dashboard-graph/22117)

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**Author:** [@Henjoe](https://discourse.nodered.org/u/Henjoe)\
**Replies:** 0\
**Last updated:** [23 February 2020 06:40 UTC](https://discourse.nodered.org/t/put-labels-on-y-axis-dashboard-graph/22117 "2020-02-23T06:40:45Z")

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Dear Node-red experts, May I know if this is possible? Let say the label of Y-axis should be unit of Temperature (deg C) but I can't find if there is a way to do it in the UI-graph node. Thanks alot! Regards,

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## [Kafka to Hadoop](https://discourse.nodered.org/t/kafka-to-hadoop/22111)

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**Author:** [@hackett91](https://discourse.nodered.org/u/hackett91)\
**Replies:** 0\
**Last updated:** [23 February 2020 01:00 UTC](https://discourse.nodered.org/t/kafka-to-hadoop/22111 "2020-02-23T01:00:23Z")

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Is there a way to transfer all the event published to a Kafka topic to Hadoop? (a sort of ingestion method)?

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## [How do I determine how long a message from inject node takes to go through my system and output to a Grafana dashboard](https://discourse.nodered.org/t/how-do-i-determine-how-long-a-message-from-inject-node-takes-to-go-through-my-system-and-output-to-a-grafana-dashboard/22014)

<div class="topic-metadata">

**Author:** [@hackett91](https://discourse.nodered.org/u/hackett91)\
**Replies:** 7\
**Last updated:** [23 February 2020 00:57 UTC](https://discourse.nodered.org/t/how-do-i-determine-how-long-a-message-from-inject-node-takes-to-go-through-my-system-and-output-to-a-grafana-dashboard/22014 "2020-02-23T00:57:44Z")

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Hi there, I am using inject nodes to simulate a sensor which is producing messages to MQTT, then to Kafka, InfluxDB and finally Grafana. How do I determine how long a message from inject node takes to go through my syst…

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## [Loosing flow changes after PI reboot](https://discourse.nodered.org/t/loosing-flow-changes-after-pi-reboot/22102)

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**Author:** [@jgabrielbastos](https://discourse.nodered.org/u/jgabrielbastos)\
**Replies:** 1\
**Last updated:** [22 February 2020 19:32 UTC](https://discourse.nodered.org/t/loosing-flow-changes-after-pi-reboot/22102 "2020-02-22T19:32:27Z")

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Hi guys, Everytime I reboot by Raspbery PI, my file flows\_openHABianPi.json gets an old version and don't save my recently changes. \[Edit\] I've noticed that all the files that I create on RaspberyPI also disapear after…

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## [RPi zero w with LM393 / "flying fish" sensor](https://discourse.nodered.org/t/rpi-zero-w-with-lm393-flying-fish-sensor/22007)

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**Author:** [@GeorgeX](https://discourse.nodered.org/u/GeorgeX)\
**Replies:** 18\
**Last updated:** [22 February 2020 18:04 UTC](https://discourse.nodered.org/t/rpi-zero-w-with-lm393-flying-fish-sensor/22007 "2020-02-22T18:04:06Z")

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Hi ! I use a raspberry pi zero w, node-red, mosquito......as smart home system. Connected per wire are some DS18B20 temperature sensors, a sonic sensor in a well, normally closed switch in sewage pipe, some wireless ESP…

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## [Modbus Alive Unit Scanner](https://discourse.nodered.org/t/modbus-alive-unit-scanner/22097)

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**Author:** [@ind\_automation](https://discourse.nodered.org/u/ind_automation)\
**Replies:** 0\
**Last updated:** [22 February 2020 16:55 UTC](https://discourse.nodered.org/t/modbus-alive-unit-scanner/22097 "2020-02-22T16:55:39Z")

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I am attempting to write a flow that reads from all possible Modbus UnitIds (1 - 254) on a single RS485 network to check to see if the slave is online. If the unit is online (responds to the read request) I will add it …

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## [Httpstatic image path](https://discourse.nodered.org/t/httpstatic-image-path/22067)

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**Author:** [@chucksteele](https://discourse.nodered.org/u/chucksteele)\
**Replies:** 3\
**Last updated:** [22 February 2020 16:55 UTC](https://discourse.nodered.org/t/httpstatic-image-path/22067 "2020-02-22T16:55:04Z")

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Embarrassed to ask, but I'm stumped. Windows 10 Pro. Standard installation. In settings.js: httpStatic: '/images/', In console: C:\\images Img path in Template: Nada in browser. I thought httpStatic '/images/' was…

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## [7 segment countdown timer](https://discourse.nodered.org/t/7-segment-countdown-timer/22094)

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**Author:** [@matisok](https://discourse.nodered.org/u/matisok)\
**Replies:** 4\
**Last updated:** [22 February 2020 15:45 UTC](https://discourse.nodered.org/t/7-segment-countdown-timer/22094 "2020-02-22T15:45:28Z")

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Hi all, I am trying to make a count down timer with a rotary dial and a 7 segment display. (A kitchen egg timer). I was considering this product but will I be able to control this from with-in node-red? Mathias

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## [Hex String to Binary](https://discourse.nodered.org/t/hex-string-to-binary/22073)

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**Author:** [@TheadehAnank](https://discourse.nodered.org/u/TheadehAnank)\
**Replies:** 2\
**Last updated:** [22 February 2020 15:24 UTC](https://discourse.nodered.org/t/hex-string-to-binary/22073 "2020-02-22T15:24:15Z")

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Hello - I am trying to convert a Hex String to Binary, then sending binary to a device using TCP Request Node. However, the device is not responding correctly. So far, I have the following code. Not really sure what I'm …

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## [Install nodejs 12 on Raspbian Jessie](https://discourse.nodered.org/t/install-nodejs-12-on-raspbian-jessie/22088)

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**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 6\
**Last updated:** [22 February 2020 15:17 UTC](https://discourse.nodered.org/t/install-nodejs-12-on-raspbian-jessie/22088 "2020-02-22T15:17:40Z")

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I want to install nodejs 12 on Raspbian Jessie on a Pi 3 currently running v10.x. I uninstalled nodejs using apt and then ran the pi install script, but it installed 10.x again. Is it not possible to install 12 on Jess…

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## [One dashboard for several instances](https://discourse.nodered.org/t/one-dashboard-for-several-instances/22085)

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**Author:** [@tobiasselin](https://discourse.nodered.org/u/tobiasselin)\
**Replies:** 6\
**Last updated:** [22 February 2020 14:44 UTC](https://discourse.nodered.org/t/one-dashboard-for-several-instances/22085 "2020-02-22T14:44:48Z")

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I'm running a couple of NR instances and would like to control flows on all of them with one dashboard. I guess I could send payloads over mqtt to the instance running the dashboard and back, or use links, but is there a…

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## [Node-RED installation on 2nd Rpi](https://discourse.nodered.org/t/node-red-installation-on-2nd-rpi/22093)

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**Author:** [@gschmidt](https://discourse.nodered.org/u/gschmidt)\
**Replies:** 2\
**Last updated:** [22 February 2020 13:45 UTC](https://discourse.nodered.org/t/node-red-installation-on-2nd-rpi/22093 "2020-02-22T13:45:02Z")

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Hi, I want to play around with Node-RED on a Rpi Now I already have a Rpi3b+ running with Domoticz and MQTT (zigbee2mqtt). I was wondering If I could install Node-RED on a second Rpi3b, but still be able to use MQTT o…

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## [Light automation](https://discourse.nodered.org/t/light-automation/22090)

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**Author:** [@flixlix](https://discourse.nodered.org/u/flixlix)\
**Replies:** 0\
**Last updated:** [22 February 2020 11:16 UTC](https://discourse.nodered.org/t/light-automation/22090 "2020-02-22T11:16:05Z")

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Hi, this is my first post here! I'm relatively new to Node Red and I would appreciate it if anyone could help with this issue. I'm trying to automate a light that is synchronised with the CO2 levels inside my house. I w…

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## [Function Node, which code is more efficient?](https://discourse.nodered.org/t/function-node-which-code-is-more-efficient/22036)

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**Author:** [@wb666greene](https://discourse.nodered.org/u/wb666greene)\
**Replies:** 14\
**Last updated:** [22 February 2020 08:25 UTC](https://discourse.nodered.org/t/function-node-which-code-is-more-efficient/22036 "2020-02-22T08:25:31Z")

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In a function node which code construct would be more efficient? Straightforward: var inside = global.get('insidePolygon'); msg.InAlertRegion=true; // default is to accept detection anywhere in image var poly=\[\[\]\];…

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## [Deconz node doesn't work](https://discourse.nodered.org/t/deconz-node-doesnt-work/22064)

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**Author:** [@kanke](https://discourse.nodered.org/u/kanke)\
**Replies:** 3\
**Last updated:** [22 February 2020 00:27 UTC](https://discourse.nodered.org/t/deconz-node-doesnt-work/22064 "2020-02-22T00:27:56Z")

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using node-red-contrib-deconz when using "event" node, when a button pressed, there is event like below (from debug) 2/21/2020, 7:20:47 AMnode: 9cd52f74.75e94 msg.payload : Object object e: "changed" id: "3" r: "sensor…

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## [Unattended Upgrades - auto update OS](https://discourse.nodered.org/t/unattended-upgrades-auto-update-os/21992)

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**Author:** [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)\
**Replies:** 3\
**Last updated:** [21 February 2020 21:28 UTC](https://discourse.nodered.org/t/unattended-upgrades-auto-update-os/21992 "2020-02-21T21:28:40Z")

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Following on from this discussion about automatically updating operating systems... I've now had chance to review unattended-upgrades after being suggested by @Colin, and after first installing it on a friends Pi, foll…

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## [Node-red contrib Nora death?](https://discourse.nodered.org/t/node-red-contrib-nora-death/22069)

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**Author:** [@whabby](https://discourse.nodered.org/u/whabby)\
**Replies:** 2\
**Last updated:** [21 February 2020 20:32 UTC](https://discourse.nodered.org/t/node-red-contrib-nora-death/22069 "2020-02-21T20:32:23Z")

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Hi everybody For me it's no longer possible to connect with Nora-Server. Theme in forum is closed. Is nora death? Regards

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## [Extend Visualizations and Chart tools in Node-RED Dashaboard \[Vega-lite or Graphana?\]\]](https://discourse.nodered.org/t/extend-visualizations-and-chart-tools-in-node-red-dashaboard-vega-lite-or-graphana/22048)

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**Author:** [@vongomben](https://discourse.nodered.org/u/vongomben)\
**Replies:** 3\
**Last updated:** [21 February 2020 19:47 UTC](https://discourse.nodered.org/t/extend-visualizations-and-chart-tools-in-node-red-dashaboard-vega-lite-or-graphana/22048 "2020-02-21T19:47:32Z")

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Hi. I have a question regarding easy ways to visualize complex datasets . My needs are: interactive ways to see the data (hovering mouse to see values, changing the zoom of the axis, have multiple variables and dat…

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## [HC-SR04 Ultrasonic Sensor - rpi-srf - status not available](https://discourse.nodered.org/t/hc-sr04-ultrasonic-sensor-rpi-srf-status-not-available/21955)

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**Author:** [@abegun](https://discourse.nodered.org/u/abegun)\
**Replies:** 9\
**Last updated:** [21 February 2020 19:39 UTC](https://discourse.nodered.org/t/hc-sr04-ultrasonic-sensor-rpi-srf-status-not-available/21955 "2020-02-21T19:39:24Z")

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Hi, I'm using the rpi-srf node with the HC-SR04 ultrasonic sensor but all I get is a status reading node-red:rpi-gpio.status.not-available How can I get a proper reading from the sensor and what am I doing wrong? Any …

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## [Order serial data for csv](https://discourse.nodered.org/t/order-serial-data-for-csv/21742)

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**Author:** [@xsilvergs](https://discourse.nodered.org/u/xsilvergs)\
**Replies:** 36\
**Last updated:** [19 February 2020 16:07 UTC](https://discourse.nodered.org/t/order-serial-data-for-csv/21742 "2020-02-19T16:07:22Z")

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This is my first project and age goes against me but I'm trying to learn node-red and use it in this project. This project is to collect data from Victron equipment and other brands in the future. There are 2 USB seria…

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## [Slash (/) in http in params?](https://discourse.nodered.org/t/slash-in-http-in-params/22066)

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**Author:** [@RobP](https://discourse.nodered.org/u/RobP)\
**Replies:** 1\
**Last updated:** [21 February 2020 17:38 UTC](https://discourse.nodered.org/t/slash-in-http-in-params/22066 "2020-02-21T17:38:37Z")

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I know I can setup a http in node like /api/:name and whatever is provided after api/ I can find in msg.req.params.name. However, this does not work in name contains a slash, like name/me. I see that in Express I can u…

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