# Latest **URL:** https://discourse.nodered.org/latest.md?page=933 [Latest](https://discourse.nodered.org/latest.md) · [Categories](https://discourse.nodered.org/categories.md) · [Tags](https://discourse.nodered.org/tags.md) **Page:** 934 --- ## [How to limit persistent context data created by the state-flow node](https://discourse.nodered.org/t/how-to-limit-persistent-context-data-created-by-the-state-flow-node/37412)
**Author:** [@Tomadoggy](https://discourse.nodered.org/u/Tomadoggy)\ **Replies:** 16\ **Last updated:** [14 December 2020 19:20 UTC](https://discourse.nodered.org/t/how-to-limit-persistent-context-data-created-by-the-state-flow-node/37412 "2020-12-14T19:20:16Z")
Thank you for this guide! My question: Is there a method to clear out records older than X, or when a file size is reached, or some other manner to help ensure that the stored file size does not grow too large? In my … --- ## [Node.status clear in entire flow?](https://discourse.nodered.org/t/node-status-clear-in-entire-flow/37477)
**Author:** [@softy2k](https://discourse.nodered.org/u/softy2k)\ **Replies:** 7\ **Last updated:** [14 December 2020 16:50 UTC](https://discourse.nodered.org/t/node-status-clear-in-entire-flow/37477 "2020-12-14T16:50:24Z")
Is there a possibility to make a clear node.status for an entire flow, triggered by some inject/function? The only possibility I know is to give Restart Flows, but I'm not interested in this method. --- ## [How to add custom node in docker?](https://discourse.nodered.org/t/how-to-add-custom-node-in-docker/37472)
**Author:** [@dhpatel177](https://discourse.nodered.org/u/dhpatel177)\ **Replies:** 1\ **Last updated:** [14 December 2020 16:26 UTC](https://discourse.nodered.org/t/how-to-add-custom-node-in-docker/37472 "2020-12-14T16:26:19Z")
I have new custom node (which consists html,Javascript file and JSON file). I want to add this in my docker image. How should i do that? Thanks --- ## [Problem with mssql](https://discourse.nodered.org/t/problem-with-mssql/37484)
**Author:** [@Jhony98](https://discourse.nodered.org/u/Jhony98)\ **Replies:** 1\ **Last updated:** [14 December 2020 15:03 UTC](https://discourse.nodered.org/t/problem-with-mssql/37484 "2020-12-14T15:03:31Z")
I have a problem connecting my node-red with a data base sql server. I have installed the node-red-contrib-mssql 0.0.7. I have installed the microssoft sql 2019 I have seen on forums that sql server has to have tcp/IP… --- ## [How to message a member of this forum?](https://discourse.nodered.org/t/how-to-message-a-member-of-this-forum/37488)
**Author:** [@FatPilot](https://discourse.nodered.org/u/FatPilot)\ **Replies:** 3\ **Last updated:** [14 December 2020 15:00 UTC](https://discourse.nodered.org/t/how-to-message-a-member-of-this-forum/37488 "2020-12-14T15:00:43Z")
Hi, How do I message a member on this forum please? I would like to contact Dave Conway-Jones or dceejay as he is known. I have found a minor issue in the world map node and wanted to inform him. Cheers. Paul. --- ## [How to split object data realtime database?](https://discourse.nodered.org/t/how-to-split-object-data-realtime-database/37468)
**Author:** [@marwinwijaya](https://discourse.nodered.org/u/marwinwijaya)\ **Replies:** 3\ **Last updated:** [14 December 2020 14:38 UTC](https://discourse.nodered.org/t/how-to-split-object-data-realtime-database/37468 "2020-12-14T14:38:40Z")
I have a data object in the real-time database. I want to retrieve the object's contents, namely the pump and timestamp, and display the data in a table. How do I do it? What nodes should I install? thank you --- ## [Split and Join Data From OPC-UA to MySQL](https://discourse.nodered.org/t/split-and-join-data-from-opc-ua-to-mysql/37357)
**Author:** [@AMBFrancesco](https://discourse.nodered.org/u/AMBFrancesco)\ **Replies:** 2\ **Last updated:** [14 December 2020 12:50 UTC](https://discourse.nodered.org/t/split-and-join-data-from-opc-ua-to-mysql/37357 "2020-12-14T12:50:13Z")
Hi Everyone, I have problems with combining data retrieved from OPC-UA server and INSERT it to a MySQL DB. I collect data correctly and I can visualize it, and also I can connect to the Database, the problems come when… --- ## [Siemens ISO Transport Protocol](https://discourse.nodered.org/t/siemens-iso-transport-protocol/37480)
**Author:** [@Ward](https://discourse.nodered.org/u/Ward)\ **Replies:** 0\ **Last updated:** [14 December 2020 12:16 UTC](https://discourse.nodered.org/t/siemens-iso-transport-protocol/37480 "2020-12-14T12:16:54Z")
Hi, I've been looking a while for a solution. But so far no succes. We have a siemens PLC with a connection throught the ISO Transport Protocol: ISO transport connections are used for data exchange between S7 stations… --- ## [How to show data from firebase to table in dashboard](https://discourse.nodered.org/t/how-to-show-data-from-firebase-to-table-in-dashboard/37466)
**Author:** [@marwinwijaya](https://discourse.nodered.org/u/marwinwijaya)\ **Replies:** 2\ **Last updated:** [14 December 2020 11:34 UTC](https://discourse.nodered.org/t/how-to-show-data-from-firebase-to-table-in-dashboard/37466 "2020-12-14T11:34:15Z")
Hello, I'm Arwin, How to display data from firebase in realtime into a table on the UI dashboard? If the data in firebase increases, the table contents will be even more? Thanks before --- ## [Iframe node not changing?](https://discourse.nodered.org/t/iframe-node-not-changing/37467)
**Author:** [@leftymuller](https://discourse.nodered.org/u/leftymuller)\ **Replies:** 2\ **Last updated:** [14 December 2020 10:58 UTC](https://discourse.nodered.org/t/iframe-node-not-changing/37467 "2020-12-14T10:58:51Z")
Hi... got problem i cant work out Can somebody point me in the right direction Here is my flow: Here is the property of the trigger The IP phone at the gate sendings a URL request when dialed which actives the tr… --- ## [No response from rpi-gpio](https://discourse.nodered.org/t/no-response-from-rpi-gpio/37393)
**Author:** [@spawnreaper](https://discourse.nodered.org/u/spawnreaper)\ **Replies:** 48\ **Last updated:** [14 December 2020 10:57 UTC](https://discourse.nodered.org/t/no-response-from-rpi-gpio/37393 "2020-12-14T10:57:00Z")
I am creating my first flow and ran into a wall. I have a raspberry pi 3 connected to a 4 relay board. my attempt is to create a nice flow that allows me to switch those 4 relays via dashboard. I created 4 dashboard s… --- ## [Reading a value in a number input dashboard node](https://discourse.nodered.org/t/reading-a-value-in-a-number-input-dashboard-node/37448)
**Author:** [@Wingnut](https://discourse.nodered.org/u/Wingnut)\ **Replies:** 4\ **Last updated:** [14 December 2020 10:56 UTC](https://discourse.nodered.org/t/reading-a-value-in-a-number-input-dashboard-node/37448 "2020-12-14T10:56:27Z")
I'm currently reading values from UDP messages and displaying values in Input Number dashboard nodes. I want to be able to change these numbers and then commit them back through a UDP message. The only way I can seem to… --- ## [Stuck in install](https://discourse.nodered.org/t/stuck-in-install/37378)
**Author:** [@spawnreaper](https://discourse.nodered.org/u/spawnreaper)\ **Replies:** 16\ **Last updated:** [14 December 2020 10:14 UTC](https://discourse.nodered.org/t/stuck-in-install/37378 "2020-12-14T10:14:28Z")
I have been struggling all day, trying guide after guide, trying to figure out how to squash all the error messages. My command line knowledge is about a 4 on a good day. I am running the install script to try and insta… --- ## [Mongodb Error : pool is draining / pool destroyed](https://discourse.nodered.org/t/mongodb-error-pool-is-draining-pool-destroyed/37470)
**Author:** [@udusa](https://discourse.nodered.org/u/udusa)\ **Replies:** 0\ **Last updated:** [14 December 2020 10:06 UTC](https://discourse.nodered.org/t/mongodb-error-pool-is-draining-pool-destroyed/37470 "2020-12-14T10:06:47Z")
Hello, I have a MongoDB server on a local network and a flow with a node-red-node-mongodb node, all works fines, but if for certain amount of time the mongodb server aren't available i am starting to get the following e… --- ## [Accessing Node-red dashboard over the Internet](https://discourse.nodered.org/t/accessing-node-red-dashboard-over-the-internet/37392)
**Author:** [@YehoosHuua](https://discourse.nodered.org/u/YehoosHuua)\ **Replies:** 11\ **Last updated:** [14 December 2020 09:59 UTC](https://discourse.nodered.org/t/accessing-node-red-dashboard-over-the-internet/37392 "2020-12-14T09:59:23Z")
Hi there, I'm a newbie to this node-red environment. but I wanna ask you guys on How to accessing my nodered dashboard over the internet (with different network). I can accessing my dashboard with different PC using my … --- ## [Restart flows using Node Red API](https://discourse.nodered.org/t/restart-flows-using-node-red-api/34632)
**Author:** [@krzydec](https://discourse.nodered.org/u/krzydec)\ **Replies:** 10\ **Last updated:** [14 December 2020 09:06 UTC](https://discourse.nodered.org/t/restart-flows-using-node-red-api/34632 "2020-12-14T09:06:58Z")
Hello Please can somebody help with the working example of how to restart flows using API. Link to Node Red documentation I found a similar topic marked as solved, but I cannot really see the solution there. Link to… --- ## [Found quirk with MySQL configuration node?](https://discourse.nodered.org/t/found-quirk-with-mysql-configuration-node/36849)
**Author:** [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\ **Replies:** 2\ **Last updated:** [14 December 2020 04:27 UTC](https://discourse.nodered.org/t/found-quirk-with-mysql-configuration-node/36849 "2020-12-14T04:27:15Z")
I have various flows on the same Pi device that all use the same MySQL configuration node. The single MySQL configuration node is working, but... I keep seeing in the debug window, this error message that makes no sense… --- ## [Raspberry pi based Industrial Automation using Node-RED platform](https://discourse.nodered.org/t/raspberry-pi-based-industrial-automation-using-node-red-platform/36934)
**Author:** [@Squirrelbd](https://discourse.nodered.org/u/Squirrelbd)\ **Replies:** 2\ **Last updated:** [14 December 2020 04:05 UTC](https://discourse.nodered.org/t/raspberry-pi-based-industrial-automation-using-node-red-platform/36934 "2020-12-14T04:05:54Z")
Industrial Automation using Node-RED Dashboard and Raspberry pi As Node-RED is an IoT tool and Raspberry pi can be used as a controller and processor, we can deploy Node-RED and Raspberry pi to collect data from sensors.… --- ## [Node-red-pubsub](https://discourse.nodered.org/t/node-red-pubsub/37380)
**Author:** [@devi-vk](https://discourse.nodered.org/u/devi-vk)\ **Replies:** 4\ **Last updated:** [14 December 2020 00:56 UTC](https://discourse.nodered.org/t/node-red-pubsub/37380 "2020-12-14T00:56:11Z")
Hi, When I tried to connect my GCP pubsub to node-red pubsub node, it gives the error "Error: secretOrPrivateKey must have a value". The state of the node is connected. Please, someone, guide me on how to solve this err… --- ## [No module named rpi\_rf Import Error (433 mhz sender reciever)](https://discourse.nodered.org/t/no-module-named-rpi-rf-import-error-433-mhz-sender-reciever/37454)
**Author:** [@Elektroman](https://discourse.nodered.org/u/Elektroman)\ **Replies:** 7\ **Last updated:** [13 December 2020 22:20 UTC](https://discourse.nodered.org/t/no-module-named-rpi-rf-import-error-433-mhz-sender-reciever/37454 "2020-12-13T22:20:32Z")
Hi, i have this fault message when i run the code for the send with python3-function on node red. Same code working without any problem with Thonny IDE. Somehow import of rpi\_rf working not corectly. Does anyone has an … --- ## [Multicast Issue](https://discourse.nodered.org/t/multicast-issue/37088)
**Author:** [@jmorris644](https://discourse.nodered.org/u/jmorris644)\ **Replies:** 33\ **Last updated:** [13 December 2020 18:24 UTC](https://discourse.nodered.org/t/multicast-issue/37088 "2020-12-13T18:24:45Z")
I need some help using multicast in node-red. I have some light switches that do a multi-cast communications on 239.255.250.250:4447. I have set up a UDP IN multicast node to this addr/port. When I do a tcpdump on port… --- ## [Can't make a 16x2 LCD Display work with Node-RED](https://discourse.nodered.org/t/cant-make-a-16x2-lcd-display-work-with-node-red/37400)
**Author:** [@danilo-lorenzo](https://discourse.nodered.org/u/danilo-lorenzo)\ **Replies:** 2\ **Last updated:** [13 December 2020 14:37 UTC](https://discourse.nodered.org/t/cant-make-a-16x2-lcd-display-work-with-node-red/37400 "2020-12-13T14:37:52Z")
Hello guys, I'm new to this Node-RED world and i'm simply in love with it :slight\_smile:. However i really need some help. I would like to use a 1602 display with my Raspberry via Node-RED. I've tried doing this with t… --- ## [Node-Red in PLCnext AXC F 2152 line chart problems](https://discourse.nodered.org/t/node-red-in-plcnext-axc-f-2152-line-chart-problems/37362)
**Author:** [@robo7795](https://discourse.nodered.org/u/robo7795)\ **Replies:** 8\ **Last updated:** [13 December 2020 13:43 UTC](https://discourse.nodered.org/t/node-red-in-plcnext-axc-f-2152-line-chart-problems/37362 "2020-12-13T13:43:45Z")
Hello, I have installed Node-Red in a Docker on a PLCnext controller (AXC F 2152 firmware 2020.6). Via OPC UA I want to create a line graph in Node-Red that is to be generated by a real variable. Unfortunately, the grap… --- ## [ADS Connection to Twincat 2 from Node Red Docker](https://discourse.nodered.org/t/ads-connection-to-twincat-2-from-node-red-docker/37411)
**Author:** [@MichaelSeiffert](https://discourse.nodered.org/u/MichaelSeiffert)\ **Replies:** 1\ **Last updated:** [13 December 2020 13:42 UTC](https://discourse.nodered.org/t/ads-connection-to-twincat-2-from-node-red-docker/37411 "2020-12-13T13:42:16Z")
Hello, this ar my first steps with node-red. I´ll try to connect my CX9020 (twincat 2 V2.11 B2306) to node-red, which is installed on my qnap nas in a docker container. I installed the node-red-contrib-ads. I can´t co… --- ## [I want to figure out how to plot a line chart without the characters in the plot below](https://discourse.nodered.org/t/i-want-to-figure-out-how-to-plot-a-line-chart-without-the-characters-in-the-plot-below/37442)
**Author:** [@Munier](https://discourse.nodered.org/u/Munier)\ **Replies:** 7\ **Last updated:** [13 December 2020 12:16 UTC](https://discourse.nodered.org/t/i-want-to-figure-out-how-to-plot-a-line-chart-without-the-characters-in-the-plot-below/37442 "2020-12-13T12:16:22Z")
I'd appreciate some guidance on figuring out the reason behind the straight line for both the flow and level trend. Thank you --- ## [Getting data into InfluxDB](https://discourse.nodered.org/t/getting-data-into-influxdb/37430)
**Author:** [@indedark](https://discourse.nodered.org/u/indedark)\ **Replies:** 4\ **Last updated:** [13 December 2020 13:04 UTC](https://discourse.nodered.org/t/getting-data-into-influxdb/37430 "2020-12-13T13:04:20Z")
First off, I was originally going to use SQLite, but the size of my DB was going to get ugly, so I've switched over to InfluxDB with Grafana and Telegraf. I've install the InfluxDB npn to node red but I've also configur… --- ## [Set change-node Payloadpath to msg.payload.+global](https://discourse.nodered.org/t/set-change-node-payloadpath-to-msg-payload-global/37440)
**Author:** [@Dom19882](https://discourse.nodered.org/u/Dom19882)\ **Replies:** 27\ **Last updated:** [13 December 2020 12:42 UTC](https://discourse.nodered.org/t/set-change-node-payloadpath-to-msg-payload-global/37440 "2020-12-13T12:42:05Z")
Hello, i would like to do sth simple i guess, but i cannot figure out how to do it exactly. I would like to let my msg.payload be sth like "msg.payload.ZbReceived.0xCE25" with a change node. Of course there is no issue… --- ## [Introducing Node Red to IMB Cloud](https://discourse.nodered.org/t/introducing-node-red-to-imb-cloud/37444)
**Author:** [@Andrew4891](https://discourse.nodered.org/u/Andrew4891)\ **Replies:** 0\ **Last updated:** [13 December 2020 11:26 UTC](https://discourse.nodered.org/t/introducing-node-red-to-imb-cloud/37444 "2020-12-13T11:26:07Z")
Hi there, I am new to this forum, so hello to everybody. I am trying to use the Node Red App in IBM Cloud. Let me specify, I have a Lite account on the platform but currently no app installed. I tried starting the Dep… --- ## [Node-red with Müller-Licht tink (ZBT-ExtendedColor)](https://discourse.nodered.org/t/node-red-with-muller-licht-tink-zbt-extendedcolor/37250)
**Author:** [@xcommy](https://discourse.nodered.org/u/xcommy)\ **Replies:** 3\ **Last updated:** [13 December 2020 10:58 UTC](https://discourse.nodered.org/t/node-red-with-muller-licht-tink-zbt-extendedcolor/37250 "2020-12-13T10:58:36Z")
Hi! I am trying to build some CO2 warning lamp for my son with homee, node-red and the Conbee USB stick. I am able to control the lamp via the Phoscon web app, but I have no idea how to get the right parameters within … --- ## [Template literals do not work](https://discourse.nodered.org/t/template-literals-do-not-work/37441)
**Author:** [@Meng](https://discourse.nodered.org/u/Meng)\ **Replies:** 1\ **Last updated:** [13 December 2020 10:33 UTC](https://discourse.nodered.org/t/template-literals-do-not-work/37441 "2020-12-13T10:33:46Z")
Hi all, I want to clean my code a bit and came by some advise to use template literals substitutions instead of string concatenation to make the code more readible. When i try this the results just shows the literals in… [Previous page](https://discourse.nodered.org/latest.md?page=932) [Next page](https://discourse.nodered.org/latest.md?page=934)