# Latest **URL:** https://discourse.nodered.org/latest.md?page=1037 [Latest](https://discourse.nodered.org/latest.md) · [Categories](https://discourse.nodered.org/categories.md) · [Tags](https://discourse.nodered.org/tags.md) **Page:** 1038 --- ## [Switch Node Sequence Rules](https://discourse.nodered.org/t/switch-node-sequence-rules/30405)
**Author:** [@n61ab](https://discourse.nodered.org/u/n61ab)\ **Replies:** 4\ **Last updated:** [20 July 2020 19:16 UTC](https://discourse.nodered.org/t/switch-node-sequence-rules/30405 "2020-07-20T19:16:02Z")
I have imported a flow that uses the Switch Node in a way I want to understand what it does. I am looking for information on how to use the "Sequence Rules" in the Switch Node. More specifically the "Index Between" rul… --- ## [TCP Data to csv file](https://discourse.nodered.org/t/tcp-data-to-csv-file/30411)
**Author:** [@valmik](https://discourse.nodered.org/u/valmik)\ **Replies:** 0\ **Last updated:** [20 July 2020 17:58 UTC](https://discourse.nodered.org/t/tcp-data-to-csv-file/30411 "2020-07-20T17:58:15Z")
Hello , From IoT sensor I am getting data over GPRS ( TCP ) format and able to create csv file by using TCP,CSV,SPLIT & FILE node I am getting below format in csv file $SLU355000082004871 06 430 200720162523 01 nu… --- ## [Better Smartphone support!](https://discourse.nodered.org/t/better-smartphone-support/30103)
**Author:** [@lizzardguki](https://discourse.nodered.org/u/lizzardguki)\ **Replies:** 14\ **Last updated:** [20 July 2020 16:44 UTC](https://discourse.nodered.org/t/better-smartphone-support/30103 "2020-07-20T16:44:48Z")
I followed the installation instructions to run node-red from my smartphone via Termux. In time of writing this post i am at field work (managing traffic) and i have a LOT of free time on my hand , and i one of mine clie… --- ## [SHT20 Digital Thermostat](https://discourse.nodered.org/t/sht20-digital-thermostat/30399)
**Author:** [@Ki-va](https://discourse.nodered.org/u/Ki-va)\ **Replies:** 8\ **Last updated:** [20 July 2020 16:29 UTC](https://discourse.nodered.org/t/sht20-digital-thermostat/30399 "2020-07-20T16:29:02Z")
hi, I bought an SHT20 Digital Thermostat Temperature Humidity Controller Sensor and I'm having prombems connecting it to NR. The sensor have 4 wires: 3.3V SDA SCL GND I've connected the wires accordingly to the RP… --- ## [Lora to excel with nodered](https://discourse.nodered.org/t/lora-to-excel-with-nodered/30390)
**Author:** [@perico](https://discourse.nodered.org/u/perico)\ **Replies:** 3\ **Last updated:** [20 July 2020 16:27 UTC](https://discourse.nodered.org/t/lora-to-excel-with-nodered/30390 "2020-07-20T16:27:39Z")
Hello everybody, I get the data of my gateway with Lora node, but now I need to save this data (temperatures) in a Excel file. I'm using the nodes of the picture below, I've tried with and without csv node, but nothing… --- ## [Error installing node-red-contrib-modbus](https://discourse.nodered.org/t/error-installing-node-red-contrib-modbus/30395)
**Author:** [@josebelzam](https://discourse.nodered.org/u/josebelzam)\ **Replies:** 4\ **Last updated:** [20 July 2020 16:09 UTC](https://discourse.nodered.org/t/error-installing-node-red-contrib-modbus/30395 "2020-07-20T16:09:49Z")
Hi all, I'm trying to install node-red-contrib-modbus on my linux based PLC but it seems like I have a problem with the serial port configuration (I'm not sure). Bellow is the error code Could someone help me? Thanks… --- ## [Developing REST APIs using Node-red for a web application](https://discourse.nodered.org/t/developing-rest-apis-using-node-red-for-a-web-application/30392)
**Author:** [@kushan-athukorala](https://discourse.nodered.org/u/kushan-athukorala)\ **Replies:** 3\ **Last updated:** [20 July 2020 14:33 UTC](https://discourse.nodered.org/t/developing-rest-apis-using-node-red-for-a-web-application/30392 "2020-07-20T14:33:16Z")
I know that Node-red can be used to create and expose REST APIs easily. It uses nodejs and express internally to expose the REST services. I am planning to develop a node-red and mongodb backed REST APIs for a commercia… --- ## [Callback in Node red](https://discourse.nodered.org/t/callback-in-node-red/5919)
**Author:** [@akhilendharreddy](https://discourse.nodered.org/u/akhilendharreddy)\ **Replies:** 8\ **Last updated:** [20 July 2020 13:49 UTC](https://discourse.nodered.org/t/callback-in-node-red/5919 "2020-07-20T13:49:16Z")
I have lot of flows in my node red project, i want to track each and every flow, after success of each flow i want do some action like store data in db flow1 successfully injected , how can track each and every flow? --- ## [Help with Example of hdl-automation-nodered use](https://discourse.nodered.org/t/help-with-example-of-hdl-automation-nodered-use/30404)
**Author:** [@tenabiker](https://discourse.nodered.org/u/tenabiker)\ **Replies:** 0\ **Last updated:** [20 July 2020 13:43 UTC](https://discourse.nodered.org/t/help-with-example-of-hdl-automation-nodered-use/30404 "2020-07-20T13:43:55Z")
Hello, I'm very new to nodered community and I'm facing many difficulties using this node (which connects to the equipment I'm working this days). If someone could share a simple project, it will be great for my learni… --- ## [How to recognize doorbell sound](https://discourse.nodered.org/t/how-to-recognize-doorbell-sound/29360)
**Author:** [@janvda](https://discourse.nodered.org/u/janvda)\ **Replies:** 18\ **Last updated:** [20 July 2020 13:15 UTC](https://discourse.nodered.org/t/how-to-recognize-doorbell-sound/29360 "2020-07-20T13:15:48Z")
I would like to connect my doorbell (see picture) to the internet. ... but I would like to do that in a bit special way. The idea: In my living room I am having a AIY Voice Kit (= raspberry pi with micro and speaker… --- ## ['Persistent Context' variable names and 'Projects'...something to remember](https://discourse.nodered.org/t/persistent-context-variable-names-and-projects-something-to-remember/11614)
**Author:** [@zenofmud](https://discourse.nodered.org/u/zenofmud)\ **Replies:** 11\ **Last updated:** [20 July 2020 12:42 UTC](https://discourse.nodered.org/t/persistent-context-variable-names-and-projects-something-to-remember/11614 "2020-07-20T12:42:01Z")
There is some thing you should keep in mind when using projects and your flow is using 'Persistent Context' - the name of your variable. Say you have project called 'greenhouse' and you create a global persistent contex… --- ## [Blocking full message in function node](https://discourse.nodered.org/t/blocking-full-message-in-function-node/30396)
**Author:** [@Chorum](https://discourse.nodered.org/u/Chorum)\ **Replies:** 5\ **Last updated:** [20 July 2020 12:26 UTC](https://discourse.nodered.org/t/blocking-full-message-in-function-node/30396 "2020-07-20T12:26:44Z")
Hello, i would like to know how i can block a complete message in a function node.(Not with other nodes) ATM i use: msg.payload = {}; but with this method i get only an empty payload. Is there a easy way to block th… --- ## [How many ports can be used in Node-Red?](https://discourse.nodered.org/t/how-many-ports-can-be-used-in-node-red/30382)
**Author:** [@MadanKumar](https://discourse.nodered.org/u/MadanKumar)\ **Replies:** 5\ **Last updated:** [20 July 2020 12:08 UTC](https://discourse.nodered.org/t/how-many-ports-can-be-used-in-node-red/30382 "2020-07-20T12:08:31Z")
Hello, This is Madan Kumar. i have a query that how many Ports can be used in Node-Red? is there any restrictions? or only Multiple ports can be used?? will be waiting for your reply. Thanks&Regards, M.Madan Kumar. --- ## [Building a 3 element array from "form" and "dropdown" nodes to send on button click](https://discourse.nodered.org/t/building-a-3-element-array-from-form-and-dropdown-nodes-to-send-on-button-click/30385)
**Author:** [@zazas321](https://discourse.nodered.org/u/zazas321)\ **Replies:** 10\ **Last updated:** [20 July 2020 11:50 UTC](https://discourse.nodered.org/t/building-a-3-element-array-from-form-and-dropdown-nodes-to-send-on-button-click/30385 "2020-07-20T11:50:05Z")
Hello. I am trying to figure out the most logical way to build a 3 element payload array and out of form and dropdown nodes. 1 variable comes from "dropdown" node ( "Device") 2 variables comes from "form" node ("Item"… --- ## [Questions from a Newbie - Looking for Help](https://discourse.nodered.org/t/questions-from-a-newbie-looking-for-help/29659)
**Author:** [@oncdastan](https://discourse.nodered.org/u/oncdastan)\ **Replies:** 25\ **Last updated:** [20 July 2020 11:13 UTC](https://discourse.nodered.org/t/questions-from-a-newbie-looking-for-help/29659 "2020-07-20T11:13:51Z")
Hi. I am new to Node-Red, and haven't done much with Pi. In my current project, I came across a few problems. Most of them are solved, thanks to this forum. Now, I have 4 problems left: 1- Starting Node-Red at boot, an… --- ## [Inserting Plotly charts into Dashboard](https://discourse.nodered.org/t/inserting-plotly-charts-into-dashboard/29641)
**Author:** [@e-Duardo](https://discourse.nodered.org/u/e-Duardo)\ **Replies:** 6\ **Last updated:** [20 July 2020 09:27 UTC](https://discourse.nodered.org/t/inserting-plotly-charts-into-dashboard/29641 "2020-07-20T09:27:59Z")
Hi, I want to represent pairs of values in a polar chart (one of the values is the module or radius and the other one is the phase or angle). I was suggested to use the Plotly charts. And before making my own chart, I … --- ## [Delay node problem with override](https://discourse.nodered.org/t/delay-node-problem-with-override/8687)
**Author:** [@ratomas](https://discourse.nodered.org/u/ratomas)\ **Replies:** 16\ **Last updated:** [20 July 2020 08:42 UTC](https://discourse.nodered.org/t/delay-node-problem-with-override/8687 "2020-07-20T08:42:58Z")
Hi. I tried to set override for delay. When I have msg.payload = true ( without delay ), for msg.payload = false ( defined delay ). Off delay works without problem, but for on delay I have at beginning flip-flop signal … --- ## [Combining "form" and "dropdown" payload data and building a mysql query](https://discourse.nodered.org/t/combining-form-and-dropdown-payload-data-and-building-a-mysql-query/30377)
**Author:** [@zazas321](https://discourse.nodered.org/u/zazas321)\ **Replies:** 2\ **Last updated:** [20 July 2020 08:38 UTC](https://discourse.nodered.org/t/combining-form-and-dropdown-payload-data-and-building-a-mysql-query/30377 "2020-07-20T08:38:42Z")
Hello. I am trying to build an MYSQL query from user input "form" and "dropdown" nodes. I am using "change" nodes and "join" node to build an array out of 3 inputs that the user needs to give : Device,Item,Serial. T… --- ## [Connection with database error](https://discourse.nodered.org/t/connection-with-database-error/30172)
**Author:** [@shipra](https://discourse.nodered.org/u/shipra)\ **Replies:** 114\ **Last updated:** [20 July 2020 08:31 UTC](https://discourse.nodered.org/t/connection-with-database-error/30172 "2020-07-20T08:31:42Z")
"ConnectionError: Login failed for user 'sa'." getting this eeror i have created a databse name RFID\_ENTRIES1 ,and i am sending my data through mqtt node and data is getting correctly but i have to compare this data to … --- ## [Post data for PowerBI](https://discourse.nodered.org/t/post-data-for-powerbi/30340)
**Author:** [@giorgis](https://discourse.nodered.org/u/giorgis)\ **Replies:** 2\ **Last updated:** [20 July 2020 08:06 UTC](https://discourse.nodered.org/t/post-data-for-powerbi/30340 "2020-07-20T08:06:32Z")
Hi all! I have just started exploring my way around Node-RED so please excuse my ignorance and bear with me. What I have seen so far is that it's possible to POST data in a streaming PowerBI dataset. This implementati… --- ## [Type Error: Cannot read property of '1' of undefined](https://discourse.nodered.org/t/type-error-cannot-read-property-of-1-of-undefined/30370)
**Author:** [@Henjoe](https://discourse.nodered.org/u/Henjoe)\ **Replies:** 7\ **Last updated:** [20 July 2020 07:59 UTC](https://discourse.nodered.org/t/type-error-cannot-read-property-of-1-of-undefined/30370 "2020-07-20T07:59:31Z")
Hello, I have a node-red-contrib-file-function which allows me to create a function on nodered outside the nodered itself. My application is simple, I just read data from my influxDB and do some calculations from the dat… --- ## [Feature suggestion for dashboard. New widget](https://discourse.nodered.org/t/feature-suggestion-for-dashboard-new-widget/30111)
**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\ **Replies:** 12\ **Last updated:** [20 July 2020 07:31 UTC](https://discourse.nodered.org/t/feature-suggestion-for-dashboard-new-widget/30111 "2020-07-20T07:31:16Z")
Yes, the dashboard has some great things and with the library there are even more great widgets to use. Widgets as in things to add to the GUI to make it look nicer. Suggestion: A scroll wheel. When the mouse is over… --- ## [Dashboard very slow](https://discourse.nodered.org/t/dashboard-very-slow/30135)
**Author:** [@e-Duardo](https://discourse.nodered.org/u/e-Duardo)\ **Replies:** 4\ **Last updated:** [20 July 2020 06:28 UTC](https://discourse.nodered.org/t/dashboard-very-slow/30135 "2020-07-20T06:28:49Z")
Hi, I am using Node-RED to monitor a process, but I am in a point that it is not usable because the dashboard has a very slow response. Hay checked the flow by debugging (I put debug nodes together with the dashboard … --- ## [How to pass payload data from user "form" to function](https://discourse.nodered.org/t/how-to-pass-payload-data-from-user-form-to-function/30106)
**Author:** [@zazas321](https://discourse.nodered.org/u/zazas321)\ **Replies:** 15\ **Last updated:** [20 July 2020 06:12 UTC](https://discourse.nodered.org/t/how-to-pass-payload-data-from-user-form-to-function/30106 "2020-07-20T06:12:58Z")
Hello. I am working with node-red and mysql database. I would like to fill a form and send the data from the form to the database. The flow : So I just have a form where I fill my data, then I have the function node … --- ## [Help with exec node](https://discourse.nodered.org/t/help-with-exec-node/30324)
**Author:** [@kvramji](https://discourse.nodered.org/u/kvramji)\ **Replies:** 9\ **Last updated:** [20 July 2020 05:30 UTC](https://discourse.nodered.org/t/help-with-exec-node/30324 "2020-07-20T05:30:13Z")
I was poking around with running a python script in my raspberry pi with the exec node. It looks like my script was run by it but i don't think i know how to get the result crunched by my code in the msg.payload or debu… --- ## [Need examples for dashboards](https://discourse.nodered.org/t/need-examples-for-dashboards/2791)
**Author:** [@aihysp](https://discourse.nodered.org/u/aihysp)\ **Replies:** 4\ **Last updated:** [20 July 2020 04:13 UTC](https://discourse.nodered.org/t/need-examples-for-dashboards/2791 "2020-07-20T04:13:29Z")
Hi i want to design a dashboard in Node for IOT(Home use) can anyone give me some examples for some slick design and code i don't see any examples online but youtube videos i am have switches that will go 1/0 , ON/OFF… --- ## [Exec node choking on the following command sequence?](https://discourse.nodered.org/t/exec-node-choking-on-the-following-command-sequence/30282)
**Author:** [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\ **Replies:** 3\ **Last updated:** [20 July 2020 03:49 UTC](https://discourse.nodered.org/t/exec-node-choking-on-the-following-command-sequence/30282 "2020-07-20T03:49:25Z")
I have setup public/private key methodology for use with SSH. This is the typical implementation, create the key pair, push the public key to the remote host. Old school to be sure.. ssh-keygen -t rsa ssh-copy-id myna… --- ## [Help cron-plus and raspberry pi](https://discourse.nodered.org/t/help-cron-plus-and-raspberry-pi/30343)
**Author:** [@yotti](https://discourse.nodered.org/u/yotti)\ **Replies:** 2\ **Last updated:** [19 July 2020 23:34 UTC](https://discourse.nodered.org/t/help-cron-plus-and-raspberry-pi/30343 "2020-07-19T23:34:46Z")
hello, everyone this is my first project with node-red and raspberry pi and I need your help what I'm trying to make is... -I had my med button (GPIO input node) that turn off led -remind me later button (GPIO input … --- ## [COM port as input to Serial Node](https://discourse.nodered.org/t/com-port-as-input-to-serial-node/30238)
**Author:** [@T0T4R4](https://discourse.nodered.org/u/T0T4R4)\ **Replies:** 2\ **Last updated:** [19 July 2020 23:26 UTC](https://discourse.nodered.org/t/com-port-as-input-to-serial-node/30238 "2020-07-19T23:26:05Z")
Hi all, I am reusing a flow on 4 machines. On each machine an arduino is plugged in. Because it's windows, different COM ports are attributed to each arduino (well we can change them in Device Manager, but not sure the… --- ## [Wyze Smarthome Devices](https://discourse.nodered.org/t/wyze-smarthome-devices/30358)
**Author:** [@nicedevil](https://discourse.nodered.org/u/nicedevil)\ **Replies:** 1\ **Last updated:** [19 July 2020 23:11 UTC](https://discourse.nodered.org/t/wyze-smarthome-devices/30358 "2020-07-19T23:11:52Z")
Hey there, I was googling around on how to access Wyze IOT devices in node-red and I can‘t find anything usefull :confused: Is there anybody that was able to access these devices and turn a bulb on and off f.e.? [Previous page](https://discourse.nodered.org/latest.md?page=1036) [Next page](https://discourse.nodered.org/latest.md?page=1038)