# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1351

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

**Page:** 1352

---

## [Two Lines in one chart](https://discourse.nodered.org/t/two-lines-in-one-chart/4332)

<div class="topic-metadata">

**Author:** [@TimSchmidt](https://discourse.nodered.org/u/TimSchmidt)\
**Replies:** 9\
**Last updated:** [28 October 2018 18:37 UTC](https://discourse.nodered.org/t/two-lines-in-one-chart/4332 "2018-10-28T18:37:09Z")

</div>

Hi, I want to show two lines in one line chart but it does not work. The data comes from two databases. This is my flow trying to make this work: Blockquote \[{"id":"b8f20df9.b9a5c","type":"debug","z":"c4548fd4.bc…

---

## [How to send multiple properties to MQTT](https://discourse.nodered.org/t/how-to-send-multiple-properties-to-mqtt/4354)

<div class="topic-metadata">

**Author:** [@Capioka](https://discourse.nodered.org/u/Capioka)\
**Replies:** 13\
**Last updated:** [28 October 2018 17:35 UTC](https://discourse.nodered.org/t/how-to-send-multiple-properties-to-mqtt/4354 "2018-10-28T17:35:03Z")

</div>

Hello, I have a little question, how to send multiple value on one message MQTT. I have a HomeKit Block is send by MQTT, but i want to have the name of the block. I test a JOIN block but is don't no work Can you help…

---

## [Change from dashboard](https://discourse.nodered.org/t/change-from-dashboard/4351)

<div class="topic-metadata">

**Author:** [@kicken](https://discourse.nodered.org/u/kicken)\
**Replies:** 2\
**Last updated:** [28 October 2018 17:09 UTC](https://discourse.nodered.org/t/change-from-dashboard/4351 "2018-10-28T17:09:10Z")

</div>

Hello !! I would like an explanation of how to change a value from the dashboard to a node. I am working on a heating system where I have a ds18b20 sensor. I want to control a relay with a value that I can adjust from th…

---

## [NNH Noob need help ;)](https://discourse.nodered.org/t/nnh-noob-need-help/4360)

<div class="topic-metadata">

**Author:** [@root](https://discourse.nodered.org/u/root)\
**Replies:** 2\
**Last updated:** [28 October 2018 16:15 UTC](https://discourse.nodered.org/t/nnh-noob-need-help/4360 "2018-10-28T16:15:17Z")

</div>

I am using node red with iobroker. I have a problem with passing a flow to iobroker. \[error\] \[function:extractData\] Function tried to send a message of type string function:extractData: /\* returns: 1. travelDuratio…

---

## [Problem on generate graphs from values stored in the database using multiple data points in a single graph](https://discourse.nodered.org/t/problem-on-generate-graphs-from-values-stored-in-the-database-using-multiple-data-points-in-a-single-graph/4352)

<div class="topic-metadata">

**Author:** [@roberto.zeni](https://discourse.nodered.org/u/roberto.zeni)\
**Replies:** 5\
**Last updated:** [28 October 2018 15:20 UTC](https://discourse.nodered.org/t/problem-on-generate-graphs-from-values-stored-in-the-database-using-multiple-data-points-in-a-single-graph/4352 "2018-10-28T15:20:14Z")

</div>

Hi all, I’m a newbie in node red! I would like to show dynamically multiple data points in a single chart. I found this great video sample: https://www.youtube.com/watch?v=ccKspiI8FRw&t=978s Flow sample at: https:/…

---

## [Insert array of json data in mariadb](https://discourse.nodered.org/t/insert-array-of-json-data-in-mariadb/3776)

<div class="topic-metadata">

**Author:** [@tramanah](https://discourse.nodered.org/u/tramanah)\
**Replies:** 19\
**Last updated:** [28 October 2018 13:30 UTC](https://discourse.nodered.org/t/insert-array-of-json-data-in-mariadb/3776 "2018-10-28T13:30:32Z")

</div>

msg.topic = "Insert into mytable(DeviceId,Line,outPIN,count,Time) values (?,?,?,?,?)"; msg.payload = \[{"DeviceId": 1, "Line": 1, "outPIN": "GPIO1", "count": 15, "Time": "2018-09-23 08:14:45"}, {"DeviceId": 1, "Lin…

---

## [HomeKit Windows](https://discourse.nodered.org/t/homekit-windows/4285)

<div class="topic-metadata">

**Author:** [@Capioka](https://discourse.nodered.org/u/Capioka)\
**Replies:** 5\
**Last updated:** [28 October 2018 11:25 UTC](https://discourse.nodered.org/t/homekit-windows/4285 "2018-10-28T11:25:53Z")

</div>

Hello, i have a problem with the return of the value CurrentPosition, The value return to the module is good, but, my iPhone not actualized. The iPhone rest on open or closed et delay for take the state. This my code,…

---

## [Store messages in files and load them again](https://discourse.nodered.org/t/store-messages-in-files-and-load-them-again/4346)

<div class="topic-metadata">

**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 6\
**Last updated:** [28 October 2018 11:02 UTC](https://discourse.nodered.org/t/store-messages-in-files-and-load-them-again/4346 "2018-10-28T11:02:34Z")

</div>

Hi folks, I have ended up in a situation where I should store messages in files and load them afterwards back from those files. That works fine as long as the msg.payload contains a Buffer OR text data, since you can s…

---

## [Using function() within a function node](https://discourse.nodered.org/t/using-function-within-a-function-node/1552)

<div class="topic-metadata">

**Author:** [@max95](https://discourse.nodered.org/u/max95)\
**Replies:** 4\
**Last updated:** [28 October 2018 09:37 UTC](https://discourse.nodered.org/t/using-function-within-a-function-node/1552 "2018-10-28T09:37:34Z")

</div>

I'm trying to read data from a BH1750 i2c light intensity sensor. There is no node-red node for it, so I'm using a node.js module and trying to access it from within a function node in node-red. However anything that is …

---

## [Neural network - Internal Node or Watson](https://discourse.nodered.org/t/neural-network-internal-node-or-watson/3949)

<div class="topic-metadata">

**Author:** [@JoseGodinho](https://discourse.nodered.org/u/JoseGodinho)\
**Replies:** 24\
**Last updated:** [28 October 2018 07:54 UTC](https://discourse.nodered.org/t/neural-network-internal-node-or-watson/3949 "2018-10-28T07:54:29Z")

</div>

Hello everyone I have integrated several home sensors in my nodered configuration with the use of several protocol nodes ( Modbus / Mqtt / HTTP), these sensors, (various PIRs / electricity meter / water meter / WIFI …

---

## [Homekit-bridged install problem](https://discourse.nodered.org/t/homekit-bridged-install-problem/4267)

<div class="topic-metadata">

**Author:** [@StrongTown](https://discourse.nodered.org/u/StrongTown)\
**Replies:** 16\
**Last updated:** [27 October 2018 22:43 UTC](https://discourse.nodered.org/t/homekit-bridged-install-problem/4267 "2018-10-27T22:43:34Z")

</div>

Hi guys, The good news is I've got my NR stuff running clean and fully functional. So my next step was to install homekit-bridged. After several install attempts that failed (and checking for solutions on the inter-web…

---

## [Energy monitor for heat pump](https://discourse.nodered.org/t/energy-monitor-for-heat-pump/4283)

<div class="topic-metadata">

**Author:** [@Rosenkrantz](https://discourse.nodered.org/u/Rosenkrantz)\
**Replies:** 10\
**Last updated:** [27 October 2018 06:41 UTC](https://discourse.nodered.org/t/energy-monitor-for-heat-pump/4283 "2018-10-27T06:41:23Z")

</div>

Hello. I want to keep track of my heat pumps energy consumption. I got a meter with a blinking diode it blinks 1000/kWh I know how to get the signal in to the raspberry pi and how to create a diagram. I just need to wh…

---

## [Node-red convert from hexa to decimal](https://discourse.nodered.org/t/node-red-convert-from-hexa-to-decimal/4212)

<div class="topic-metadata">

**Author:** [@aabbas](https://discourse.nodered.org/u/aabbas)\
**Replies:** 11\
**Last updated:** [26 October 2018 21:06 UTC](https://discourse.nodered.org/t/node-red-convert-from-hexa-to-decimal/4212 "2018-10-26T21:06:51Z")

</div>

I have a raspberry pi and KNX sensors. I am using Node-RED and I wish to extract measurement (For example: Temperature). But I don’t know how to convert from hexa (Data Type “2-Octet Float Value”10) to decimal (Format: 2…

---

## [Node-red-contrib-amazondash](https://discourse.nodered.org/t/node-red-contrib-amazondash/4321)

<div class="topic-metadata">

**Author:** [@martinschki](https://discourse.nodered.org/u/martinschki)\
**Replies:** 4\
**Last updated:** [26 October 2018 20:25 UTC](https://discourse.nodered.org/t/node-red-contrib-amazondash/4321 "2018-10-26T20:25:25Z")

</div>

Hello there! I really like the amazon dash buttons for all kind of things. They are cheap and easy to use around the house... In general the node works but I've noticed that every "deploy" results in an additional "but…

---

## [Use .csv file as the source for a dashboard chart?](https://discourse.nodered.org/t/use-csv-file-as-the-source-for-a-dashboard-chart/4292)

<div class="topic-metadata">

**Author:** [@nodecentral](https://discourse.nodered.org/u/nodecentral)\
**Replies:** 21\
**Last updated:** [26 October 2018 17:22 UTC](https://discourse.nodered.org/t/use-csv-file-as-the-source-for-a-dashboard-chart/4292 "2018-10-26T17:22:03Z")

</div>

Hi Please could someone let me know how I can use a .csv file as the source for a graph on the dashboard , so that when the .csv is updated, the chart updates too ? The .csv I have called Room Temp.csv has the followin…

---

## [Documentation for dashboard](https://discourse.nodered.org/t/documentation-for-dashboard/4276)

<div class="topic-metadata">

**Author:** [@Bambulko](https://discourse.nodered.org/u/Bambulko)\
**Replies:** 2\
**Last updated:** [26 October 2018 17:19 UTC](https://discourse.nodered.org/t/documentation-for-dashboard/4276 "2018-10-26T17:19:40Z")

</div>

hi do not you know where to find some documentation for html tags and css for ui\_template? thanks

---

## [Editing node-red-dashboard widgets - ui-gauge : ui-chart](https://discourse.nodered.org/t/editing-node-red-dashboard-widgets-ui-gauge-ui-chart/4323)

<div class="topic-metadata">

**Author:** [@Bobet21](https://discourse.nodered.org/u/Bobet21)\
**Replies:** 1\
**Last updated:** [26 October 2018 17:14 UTC](https://discourse.nodered.org/t/editing-node-red-dashboard-widgets-ui-gauge-ui-chart/4323 "2018-10-26T17:14:29Z")

</div>

Hello, General question there, is there an easy way to edit the node-red-dashboard node ? The reason i am asking is that i am trying to dissociate the value read by the gauge and the numeric value that is displayed. …

---

## [Error saving data to dump file](https://discourse.nodered.org/t/error-saving-data-to-dump-file/4322)

<div class="topic-metadata">

**Author:** [@Bambulko](https://discourse.nodered.org/u/Bambulko)\
**Replies:** 0\
**Last updated:** [26 October 2018 15:39 UTC](https://discourse.nodered.org/t/error-saving-data-to-dump-file/4322 "2018-10-26T15:39:07Z")

</div>

hi when i store data from chart to dump file, i have error: "failed to write to file: Error: write after end". you do not know why? thanks here is mi flow : \[{"id":"c0d99189.5b7cf","type":"ui\_chart","z":"76afcd8c.635…

---

## [Problem with 2 line charts](https://discourse.nodered.org/t/problem-with-2-line-charts/4294)

<div class="topic-metadata">

**Author:** [@Bambulko](https://discourse.nodered.org/u/Bambulko)\
**Replies:** 5\
**Last updated:** [26 October 2018 11:25 UTC](https://discourse.nodered.org/t/problem-with-2-line-charts/4294 "2018-10-26T11:25:42Z")

</div>

i have 2 line charts with on one tab: the top chart is fine. 2 shows the measured quantities - indoor temperature and humidity. displayed values are highlighted above the graph. the lower graph does not display mois…

---

## [Node-red-log should be longer](https://discourse.nodered.org/t/node-red-log-should-be-longer/4315)

<div class="topic-metadata">

**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 0\
**Last updated:** [26 October 2018 11:01 UTC](https://discourse.nodered.org/t/node-red-log-should-be-longer/4315 "2018-10-26T11:01:18Z")

</div>

Can I suggest that the amount of history shown in node-red-log should be increased? Currently it only shows the last 25 lines of the log but often that is not enough even immediately after startup. This can be achieved…

---

## [Dashboard is not accessible from other devices in the network](https://discourse.nodered.org/t/dashboard-is-not-accessible-from-other-devices-in-the-network/4314)

<div class="topic-metadata">

**Author:** [@Georg25](https://discourse.nodered.org/u/Georg25)\
**Replies:** 11\
**Last updated:** [26 October 2018 10:57 UTC](https://discourse.nodered.org/t/dashboard-is-not-accessible-from-other-devices-in-the-network/4314 "2018-10-26T10:57:19Z")

</div>

Hi, I can only display the dashboard on the pc where nodered is running. On my mobile device nothing appears. Does anyone know the reason? Thanks Georg

---

## [Help with receiving command from function node](https://discourse.nodered.org/t/help-with-receiving-command-from-function-node/4291)

<div class="topic-metadata">

**Author:** [@DillonW](https://discourse.nodered.org/u/DillonW)\
**Replies:** 5\
**Last updated:** [26 October 2018 09:40 UTC](https://discourse.nodered.org/t/help-with-receiving-command-from-function-node/4291 "2018-10-26T09:40:08Z")

</div>

Hi, I am testing to receive commands with an arduino board(MKR 1000) and I've already registered the device to the IoT platform. The device can receive commands if I use the inject node. I want to use a function node ins…

---

## [Node-red-contrib-sonoff-server 1.0.0](https://discourse.nodered.org/t/node-red-contrib-sonoff-server-1-0-0/4310)

<div class="topic-metadata">

**Author:** [@GeorgeX](https://discourse.nodered.org/u/GeorgeX)\
**Replies:** 1\
**Last updated:** [26 October 2018 09:27 UTC](https://discourse.nodered.org/t/node-red-contrib-sonoff-server-1-0-0/4310 "2018-10-26T09:27:40Z")

</div>

Hello ! Looks like node-red-contrib-sonoff-server 1.0.0 worked earlier with the original sonoff firmware version 2.0.4 on Th16 modules. Now sonoff updated the modules to firmware version 2.6.0. and I am not able to get…

---

## [Error: certificate is not yet valid](https://discourse.nodered.org/t/error-certificate-is-not-yet-valid/4299)

<div class="topic-metadata">

**Author:** [@Pac8](https://discourse.nodered.org/u/Pac8)\
**Replies:** 2\
**Last updated:** [26 October 2018 07:18 UTC](https://discourse.nodered.org/t/error-certificate-is-not-yet-valid/4299 "2018-10-26T07:18:47Z")

</div>

Getting below error while donloading nodes to iot2020. Followed a few forums and was told to change time settings but dont know how. Can someone please help out. Many thanks. Error: Command failed: npm install --produc…

---

## [Node-red docker based on debian stretch](https://discourse.nodered.org/t/node-red-docker-based-on-debian-stretch/2402)

<div class="topic-metadata">

**Author:** [@Leosirth](https://discourse.nodered.org/u/Leosirth)\
**Replies:** 2\
**Last updated:** [26 October 2018 06:04 UTC](https://discourse.nodered.org/t/node-red-docker-based-on-debian-stretch/2402 "2018-10-26T06:04:57Z")

</div>

Hi, asking for your opinion on the best way for the following: I'm running node-red inside a docker container using the latest tag image. I need to make use of UNIX socket inside a flow and looks like the best way for …

---

## [Error evaluating expression: Argument 1 of function "replace" does not match function signature](https://discourse.nodered.org/t/error-evaluating-expression-argument-1-of-function-replace-does-not-match-function-signature/3916)

<div class="topic-metadata">

**Author:** [@Hc\_IoT](https://discourse.nodered.org/u/Hc_IoT)\
**Replies:** 4\
**Last updated:** [26 October 2018 05:11 UTC](https://discourse.nodered.org/t/error-evaluating-expression-argument-1-of-function-replace-does-not-match-function-signature/3916 "2018-10-26T05:11:11Z")

</div>

Dear All, While creating an JSONata expression I have encountered an error : "Error evaluating expression: Argument 1 of function "replace" does not match function signature" but when I put .(dot) after the payload i…

---

## [MCP23017 relay control](https://discourse.nodered.org/t/mcp23017-relay-control/4269)

<div class="topic-metadata">

**Author:** [@Orion96](https://discourse.nodered.org/u/Orion96)\
**Replies:** 8\
**Last updated:** [25 October 2018 21:04 UTC](https://discourse.nodered.org/t/mcp23017-relay-control/4269 "2018-10-25T21:04:53Z")

</div>

Hi I'm hoping this is the right place to post this question... I'm using the ncd-red-mcp23017 node with a 16 channel relay board. For now, I would like to use it to switch the lights on in the house (we are rewiring),…

---

## [Bar-code Scanner](https://discourse.nodered.org/t/bar-code-scanner/4118)

<div class="topic-metadata">

**Author:** [@Pac8](https://discourse.nodered.org/u/Pac8)\
**Replies:** 6\
**Last updated:** [25 October 2018 10:54 UTC](https://discourse.nodered.org/t/bar-code-scanner/4118 "2018-10-25T10:54:38Z")

</div>

Does any one know is it possible for a bar-code scanner to be programmed into node red.

---

## [Saving (/w 'context') values within function nodes for future use](https://discourse.nodered.org/t/saving-w-context-values-within-function-nodes-for-future-use/4279)

<div class="topic-metadata">

**Author:** [@getslow](https://discourse.nodered.org/u/getslow)\
**Replies:** 2\
**Last updated:** [25 October 2018 10:21 UTC](https://discourse.nodered.org/t/saving-w-context-values-within-function-nodes-for-future-use/4279 "2018-10-25T10:21:13Z")

</div>

Hi all, I'm new to the Java coding and I have been trying to create a dimmable LED (using PWM) that is controlled through homekit. Homekit outputs the following: ON/OFF or Brightness The goal: If the LED is turned 'ON…

---

## [Bluetooth VR Controller](https://discourse.nodered.org/t/bluetooth-vr-controller/3130)

<div class="topic-metadata">

**Author:** [@2004sk4](https://discourse.nodered.org/u/2004sk4)\
**Replies:** 1\
**Last updated:** [25 October 2018 06:55 UTC](https://discourse.nodered.org/t/bluetooth-vr-controller/3130 "2018-10-25T06:55:16Z")

</div>

What would be the best way to use a cheap $20 Evo VR bluetooth controller to work with node red. I would like have the buttons control some gpio output and the axis control some motors. I have installed noble and h…

[Previous page](https://discourse.nodered.org/latest.md?page=1350)

[Next page](https://discourse.nodered.org/latest.md?page=1352)