# General **URL:** https://discourse.nodered.org/c/general/7.md?page=549 [Latest](https://discourse.nodered.org/latest.md) · [Categories](https://discourse.nodered.org/categories.md) · [Tags](https://discourse.nodered.org/tags.md) **Page:** 550 --- ## [BME280 Sensor Init failed -\>Error: , Remote I/O error"](https://discourse.nodered.org/t/bme280-sensor-init-failed-error-remote-i-o-error/46205)
**Author:** [@Beginner96](https://discourse.nodered.org/u/Beginner96)\ **Replies:** 1\ **Last updated:** [25 May 2021 11:01 UTC](https://discourse.nodered.org/t/bme280-sensor-init-failed-error-remote-i-o-error/46205 "2021-05-25T11:01:48Z")
Hello ! I tried to connect this bme280 to my raspberry 4B. I get the following I2C adress: When I want to get the data in node red. the following happens. I don't know what I did worng. I uninstalled / install… --- ## [Waiting for missing types to be registered pm2 OK , systemd not OK](https://discourse.nodered.org/t/waiting-for-missing-types-to-be-registered-pm2-ok-systemd-not-ok/46204)
**Author:** [@dzairo](https://discourse.nodered.org/u/dzairo)\ **Replies:** 2\ **Last updated:** [25 May 2021 10:59 UTC](https://discourse.nodered.org/t/waiting-for-missing-types-to-be-registered-pm2-ok-systemd-not-ok/46204 "2021-05-25T10:59:23Z")
Hi all. For long time I again start my OrangePi Zero to play with Node-Red. I try control Input or Output for Arduino by Firmata . What is problem. If login to my OrangePi (not root) and type to command node-red , th… --- ## [Logging and JSON backup to MySQL](https://discourse.nodered.org/t/logging-and-json-backup-to-mysql/46198)
**Author:** [@OriolFM](https://discourse.nodered.org/u/OriolFM)\ **Replies:** 4\ **Last updated:** [25 May 2021 10:07 UTC](https://discourse.nodered.org/t/logging-and-json-backup-to-mysql/46198 "2021-05-25T10:07:44Z")
Hi, In my current project, I have several finite state machines that control a few AGVs that transport material. As its current state, the AGVs generate a readable verbose output each time they transit from one state t… --- ## [Node-red deployed on kubernetes(as a pod) to intereact with azure iot edge](https://discourse.nodered.org/t/node-red-deployed-on-kubernetes-as-a-pod-to-intereact-with-azure-iot-edge/46149)
**Author:** [@omarine](https://discourse.nodered.org/u/omarine)\ **Replies:** 3\ **Last updated:** [25 May 2021 08:33 UTC](https://discourse.nodered.org/t/node-red-deployed-on-kubernetes-as-a-pod-to-intereact-with-azure-iot-edge/46149 "2021-05-25T08:33:59Z")
Hello, i deployed Node-Red on azure kubernetes services to be able to interface with iotedge modules but i had this issue :slight\_smile: does anyone encountered this issue before or was able to run node-red (module … --- ## [Recommended MicroSD for Rpi ZeroW](https://discourse.nodered.org/t/recommended-microsd-for-rpi-zerow/46132)
**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\ **Replies:** 7\ **Last updated:** [25 May 2021 08:09 UTC](https://discourse.nodered.org/t/recommended-microsd-for-rpi-zerow/46132 "2021-05-25T08:09:18Z")
Guys, Deploying a RPi ZeroW to read data from my Solar Inverter and pump it out over MQTT Firstly What SD card do people recommend ? 2ndly what is the best OS/Bundle to put on it for the RPi ZeroW and NR ? Craig --- ## [\[Resolved\] Start/Stop motor with limit switch](https://discourse.nodered.org/t/resolved-start-stop-motor-with-limit-switch/3332)
**Author:** [@Pittex](https://discourse.nodered.org/u/Pittex)\ **Replies:** 20\ **Last updated:** [25 May 2021 04:59 UTC](https://discourse.nodered.org/t/resolved-start-stop-motor-with-limit-switch/3332 "2021-05-25T04:59:05Z")
Hello, I wish I could drive (start and stop) a motor with the switch on my smartphone and if the movement is detected by the limit switch stop the movement. No worries with the use of GPIO. I tested several functions b… --- ## [RS485 integration with Node-Red](https://discourse.nodered.org/t/rs485-integration-with-node-red/46163)
**Author:** [@FeliceM](https://discourse.nodered.org/u/FeliceM)\ **Replies:** 3\ **Last updated:** [25 May 2021 04:51 UTC](https://discourse.nodered.org/t/rs485-integration-with-node-red/46163 "2021-05-25T04:51:49Z")
This is not really a question about Node-Red but more about hardware. Having to integrate an RS485 Modbus TCP/IP to send sensors data, before dealing with the node I would like to ask advice about which interface board… --- ## [Websocket broadcast data to individual user](https://discourse.nodered.org/t/websocket-broadcast-data-to-individual-user/46136)
**Author:** [@Kartiknodered](https://discourse.nodered.org/u/Kartiknodered)\ **Replies:** 1\ **Last updated:** [25 May 2021 04:38 UTC](https://discourse.nodered.org/t/websocket-broadcast-data-to-individual-user/46136 "2021-05-25T04:38:16Z")
Hello everyone , can any one tell me about how can we send data using websocket to the only user who is authorised with. Currently what is happening is that i am using websocket for real-time data update but if a user u… --- ## [IoT gateway data to MQTT and then to KAFKA](https://discourse.nodered.org/t/iot-gateway-data-to-mqtt-and-then-to-kafka/46175)
**Author:** [@faiaz](https://discourse.nodered.org/u/faiaz)\ **Replies:** 2\ **Last updated:** [25 May 2021 01:22 UTC](https://discourse.nodered.org/t/iot-gateway-data-to-mqtt-and-then-to-kafka/46175 "2021-05-25T01:22:10Z")
Hi All I am first time here, and not a developer. I need help with a very basic flow I am successfully receiving data from IoT gateway via MQTT broker, i am able to filter and prepared dashboard with my data from BLE s… --- ## [Html request does not forward request body](https://discourse.nodered.org/t/html-request-does-not-forward-request-body/45887)
**Author:** [@skipware](https://discourse.nodered.org/u/skipware)\ **Replies:** 9\ **Last updated:** [24 May 2021 23:35 UTC](https://discourse.nodered.org/t/html-request-does-not-forward-request-body/45887 "2021-05-24T23:35:21Z")
Hi, I set up OOB html request node using basic authentication and TLS/SSL to IXIA REST api. The request body is not sent. On the same server where node-red is installed I can use curl with the same data and it works fin… --- ## [Conflict nodes / uninstal nodes](https://discourse.nodered.org/t/conflict-nodes-uninstal-nodes/45976)
**Author:** [@Mixter](https://discourse.nodered.org/u/Mixter)\ **Replies:** 13\ **Last updated:** [24 May 2021 18:21 UTC](https://discourse.nodered.org/t/conflict-nodes-uninstal-nodes/45976 "2021-05-24T18:21:02Z")
I warmly welcome, I tried to install nodes/libraries to nodered with command npm install ... and i saw this So then i tried to install it with Manage palette but it dont work. This node has a red triangle with an ex… --- ## [Read ink fill level from Epson Printer](https://discourse.nodered.org/t/read-ink-fill-level-from-epson-printer/43048)
**Author:** [@Urs-Eppenberger](https://discourse.nodered.org/u/Urs-Eppenberger)\ **Replies:** 7\ **Last updated:** [24 May 2021 18:09 UTC](https://discourse.nodered.org/t/read-ink-fill-level-from-epson-printer/43048 "2021-05-24T18:09:05Z")
I've got a new Epson printer ET-2750. Obviously this needs to be integrated into my node-red based home monitoring setup. I'm basically interested to collect a few parameters from the printer: ink level for the 4 colour… --- ## [How to send .json strings over MQTT](https://discourse.nodered.org/t/how-to-send-json-strings-over-mqtt/46166)
**Author:** [@Maayz](https://discourse.nodered.org/u/Maayz)\ **Replies:** 2\ **Last updated:** [24 May 2021 16:10 UTC](https://discourse.nodered.org/t/how-to-send-json-strings-over-mqtt/46166 "2021-05-24T16:10:48Z")
Hi All, I have been following this tutorial Link but i cannot get it to work when i replicate it on my machine. I have tried recreating from scratch and also downloaded the flow itself and reconfigured to my MQTT broke… --- ## [Where does NR reference time from?](https://discourse.nodered.org/t/where-does-nr-reference-time-from/46160)
**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\ **Replies:** 2\ **Last updated:** [24 May 2021 15:08 UTC](https://discourse.nodered.org/t/where-does-nr-reference-time-from/46160 "2021-05-24T15:08:54Z")
Guys, Just built a new VM - Ubuntu 20.04. Initially timezone was left as default since changed to be Sydney Australia - Date command at the CLI returns the correct date and time. However i have an inject node that is … --- ## [Add timestamp item inside array](https://discourse.nodered.org/t/add-timestamp-item-inside-array/46158)
**Author:** [@Nabil](https://discourse.nodered.org/u/Nabil)\ **Replies:** 2\ **Last updated:** [24 May 2021 13:19 UTC](https://discourse.nodered.org/t/add-timestamp-item-inside-array/46158 "2021-05-24T13:19:03Z")
Hi, I'm reading Modbus array \[5 items\] and I need to add -in the first position- the 6th item (timestamp) to log them in a csv file. I don't know how to insert the timestamp, any help is appreciated. here I created… --- ## [Stopping inject node](https://discourse.nodered.org/t/stopping-inject-node/46151)
**Author:** [@OmkarNodered](https://discourse.nodered.org/u/OmkarNodered)\ **Replies:** 1\ **Last updated:** [24 May 2021 12:26 UTC](https://discourse.nodered.org/t/stopping-inject-node/46151 "2021-05-24T12:26:14Z")
How can we stop inject node from being in running at interval? --- ## ["TypeError: Cannot read property 'toString' of undefined"](https://discourse.nodered.org/t/typeerror-cannot-read-property-tostring-of-undefined/46064)
**Author:** [@swanside](https://discourse.nodered.org/u/swanside)\ **Replies:** 34\ **Last updated:** [24 May 2021 11:40 UTC](https://discourse.nodered.org/t/typeerror-cannot-read-property-tostring-of-undefined/46064 "2021-05-24T11:40:36Z")
Hi all. I noticed a day or so ago, I have stopped getting some values. The error is "TypeError: Cannot read property 'toString' of undefined" and it comes from my 32bit Modbus converters, I have pasted the 32 bit code … --- ## [What is the command to get "python script" output using template Node](https://discourse.nodered.org/t/what-is-the-command-to-get-python-script-output-using-template-node/46144)
**Author:** [@vinaykumar.v](https://discourse.nodered.org/u/vinaykumar.v)\ **Replies:** 4\ **Last updated:** [24 May 2021 11:40 UTC](https://discourse.nodered.org/t/what-is-the-command-to-get-python-script-output-using-template-node/46144 "2021-05-24T11:40:15Z")
Hi I am vinay, Here I have written "hello world" program in python file and I have placed python file path in "exec node". From that node I want to fetch python script output into "template" node. I have used {{msg.p… --- ## [EXEC Node Run Python in FOREGROUND](https://discourse.nodered.org/t/exec-node-run-python-in-foreground/46026)
**Author:** [@farcry](https://discourse.nodered.org/u/farcry)\ **Replies:** 7\ **Last updated:** [24 May 2021 09:31 UTC](https://discourse.nodered.org/t/exec-node-run-python-in-foreground/46026 "2021-05-24T09:31:02Z")
Hello. I have python script to communicate with serial port. I start this script using EXEC-NODE: "python3 /home/pi/pyscript/pyscript.py" In processes the running script is there as python3. But it is running in BACK… --- ## [Change logo Login](https://discourse.nodered.org/t/change-logo-login/46137)
**Author:** [@trintp1999](https://discourse.nodered.org/u/trintp1999)\ **Replies:** 5\ **Last updated:** [24 May 2021 09:13 UTC](https://discourse.nodered.org/t/change-logo-login/46137 "2021-05-24T09:13:58Z")
inst-160601221226.pdf (607.2 KB) Hi all, I wanna change the logo when login to Node-red but I don't know where is this link "image: "/absolute/path/to/login/page/big/image" to change the image? --- ## [How to do a proper Modbus Data Acquisition and display](https://discourse.nodered.org/t/how-to-do-a-proper-modbus-data-acquisition-and-display/45643)
**Author:** [@Samsaminou](https://discourse.nodered.org/u/Samsaminou)\ **Replies:** 3\ **Last updated:** [24 May 2021 09:04 UTC](https://discourse.nodered.org/t/how-to-do-a-proper-modbus-data-acquisition-and-display/45643 "2021-05-24T09:04:33Z")
Node-RED version : v.0.15.3 Hello to everybody, Beginner in Nodered, I am currently working on a Modbus data acquisition system with Nodered. First of all, I managed to get the address of a counter, and to build a mod… --- ## [Deploy Node-RED to Heroku](https://discourse.nodered.org/t/deploy-node-red-to-heroku/44095)
**Author:** [@StudentStrange](https://discourse.nodered.org/u/StudentStrange)\ **Replies:** 1\ **Last updated:** [24 May 2021 05:44 UTC](https://discourse.nodered.org/t/deploy-node-red-to-heroku/44095 "2021-05-24T05:44:04Z")
Hi all, I further figured out about the files included in the Github repo that used to connect to the Heroku server and substituted with my own package.json, flow .json, repo link in app.json. After deploying again, I r… --- ## [Machinery and room access control](https://discourse.nodered.org/t/machinery-and-room-access-control/46120)
**Author:** [@brendonhatcher](https://discourse.nodered.org/u/brendonhatcher)\ **Replies:** 5\ **Last updated:** [24 May 2021 04:29 UTC](https://discourse.nodered.org/t/machinery-and-room-access-control/46120 "2021-05-24T04:29:37Z")
I am designing a makerspace. It will have dangerous machinery and restricted rooms. I'll have a membership database as a Wordpress plugin. Some of the member data will determine their rights to open doors and turn on … --- ## [Flows deployment information](https://discourse.nodered.org/t/flows-deployment-information/46047)
**Author:** [@Marty1982](https://discourse.nodered.org/u/Marty1982)\ **Replies:** 4\ **Last updated:** [24 May 2021 00:36 UTC](https://discourse.nodered.org/t/flows-deployment-information/46047 "2021-05-24T00:36:36Z")
Hi all! I want to know a detailed information about how the flow deployment is related and how it works. I mean, The Full deployment goes to one and every tab in search of modified nodes, but what the others options do… --- ## [Help/ point in the right direction](https://discourse.nodered.org/t/help-point-in-the-right-direction/46119)
**Author:** [@Cyprus125](https://discourse.nodered.org/u/Cyprus125)\ **Replies:** 3\ **Last updated:** [23 May 2021 18:26 UTC](https://discourse.nodered.org/t/help-point-in-the-right-direction/46119 "2021-05-23T18:26:06Z")
Hello, so i'm trying to get a arduino nano 33 iot device to connect to my MQTT server/node red thing. i'm at a loss for finding information, all the examples i'm finding are using Ethernet, or want some 1 wire switch t… --- ## [MQTT in only read one of five topics](https://discourse.nodered.org/t/mqtt-in-only-read-one-of-five-topics/46113)
**Author:** [@JohanR](https://discourse.nodered.org/u/JohanR)\ **Replies:** 14\ **Last updated:** [23 May 2021 18:03 UTC](https://discourse.nodered.org/t/mqtt-in-only-read-one-of-five-topics/46113 "2021-05-23T18:03:33Z")
I use a ESP8266 module for irrigation. I read humidity setpoint from nodered dashboard and some data in return back to nodered. Humidity, ip address, rssi and temp. It worked fine. I added a function for reading consumed… --- ## [Editor - Change Color Header and Tab Icon](https://discourse.nodered.org/t/editor-change-color-header-and-tab-icon/46061)
**Author:** [@Cristiano](https://discourse.nodered.org/u/Cristiano)\ **Replies:** 3\ **Last updated:** [23 May 2021 17:12 UTC](https://discourse.nodered.org/t/editor-change-color-header-and-tab-icon/46061 "2021-05-23T17:12:14Z")
Hello, I have doubt about how to change the color of the top bar (header) in nodered editor and the icon tab menu Should i use a template ? or i need to edit the node red source code? whats happens when i update the … --- ## [Count unique id's from a stream of messages](https://discourse.nodered.org/t/count-unique-ids-from-a-stream-of-messages/46110)
**Author:** [@Nice\_to\_have](https://discourse.nodered.org/u/Nice_to_have)\ **Replies:** 20\ **Last updated:** [23 May 2021 16:26 UTC](https://discourse.nodered.org/t/count-unique-ids-from-a-stream-of-messages/46110 "2021-05-23T16:26:54Z")
Hi, I am getting a stream of messages and every messages, contains an ID. Some ID's send messages more often then other ID's. How do I count the amount of ID's in a certain time, lets say 10 minutes? --- ## [Need help with Array from Payload Objects to Display in a Table](https://discourse.nodered.org/t/need-help-with-array-from-payload-objects-to-display-in-a-table/46117)
**Author:** [@eddee54455](https://discourse.nodered.org/u/eddee54455)\ **Replies:** 0\ **Last updated:** [23 May 2021 15:24 UTC](https://discourse.nodered.org/t/need-help-with-array-from-payload-objects-to-display-in-a-table/46117 "2021-05-23T15:24:42Z")
Good Day all, As a relative newbie to Node Red, Arrays are something that I know of, basically how they work and generally steer clear of due to my lack of understanding... I have (unfortunately for me) now got to the … --- ## [Node red fails to connect to mqtt broker](https://discourse.nodered.org/t/node-red-fails-to-connect-to-mqtt-broker/46111)
**Author:** [@ajocius](https://discourse.nodered.org/u/ajocius)\ **Replies:** 8\ **Last updated:** [23 May 2021 14:41 UTC](https://discourse.nodered.org/t/node-red-fails-to-connect-to-mqtt-broker/46111 "2021-05-23T14:41:28Z")
I have Mosquitto on RPI 3b that I used for couple of years now and did not do any changes in setting. RPI has restarted after power outage and gives me following error message when starting Node Red- 23 May 15:37:06 - … [Previous page](https://discourse.nodered.org/c/general/7.md?page=548) [Next page](https://discourse.nodered.org/c/general/7.md?page=550)