# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=545

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

**Page:** 546

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## [MYSQL Charts for Temperatur and Humidity](https://discourse.nodered.org/t/mysql-charts-for-temperatur-and-humidity/46551)

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**Author:** [@jason1992](https://discourse.nodered.org/u/jason1992)\
**Replies:** 1\
**Last updated:** [1 June 2021 13:22 UTC](https://discourse.nodered.org/t/mysql-charts-for-temperatur-and-humidity/46551 "2021-06-01T13:22:17Z")

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Hello people, i am looking to create a chart for temperatur and humidity. I am able to use the data and store it in sql. But i dont know how to put it in a chart. I dont knwo how to use the time and date correct And…

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## [Send value from Grafana Table to node-red](https://discourse.nodered.org/t/send-value-from-grafana-table-to-node-red/46544)

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**Author:** [@ketpa](https://discourse.nodered.org/u/ketpa)\
**Replies:** 1\
**Last updated:** [1 June 2021 12:10 UTC](https://discourse.nodered.org/t/send-value-from-grafana-table-to-node-red/46544 "2021-06-01T12:10:07Z")

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I have table in Grafana table, and I want to change value in cell and send to node red How to do that?

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## [Updating node-red on RPi](https://discourse.nodered.org/t/updating-node-red-on-rpi/46504)

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**Author:** [@lorccan](https://discourse.nodered.org/u/lorccan)\
**Replies:** 21\
**Last updated:** [1 June 2021 09:34 UTC](https://discourse.nodered.org/t/updating-node-red-on-rpi/46504 "2021-06-01T09:34:28Z")

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I am running node v14.17.0 and npm v7.15.0 on a Pi 4 I have an old install of node-red v 1.1.2 that I would like to upgrade, but I am hitting problems: Using the official install script https://raw.githubusercontent.co…

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## [Need help with how to do this](https://discourse.nodered.org/t/need-help-with-how-to-do-this/46540)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 25\
**Last updated:** [1 June 2021 08:46 UTC](https://discourse.nodered.org/t/need-help-with-how-to-do-this/46540 "2021-06-01T08:46:01Z")

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There is a Gremlin in this somewhere. I have narrowed it down to messages being received which are not correctly formatted. A valid message should look something like this: {"payload":"16:14:37@6,1","topic":"alarm\_clo…

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## [Unexpected end of json input](https://discourse.nodered.org/t/unexpected-end-of-json-input/46538)

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**Author:** [@OmkarNodered](https://discourse.nodered.org/u/OmkarNodered)\
**Replies:** 1\
**Last updated:** [1 June 2021 07:30 UTC](https://discourse.nodered.org/t/unexpected-end-of-json-input/46538 "2021-06-01T07:30:37Z")

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I have csv file having data in json format. I want to read that data as a javascript object and I am using file node and json node to read data from that file, but it is giving error that 'Unexpected end of JSON input' a…

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## [How to make a msg.payload send ascii codes?](https://discourse.nodered.org/t/how-to-make-a-msg-payload-send-ascii-codes/46537)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 1\
**Last updated:** [1 June 2021 07:08 UTC](https://discourse.nodered.org/t/how-to-make-a-msg-payload-send-ascii-codes/46537 "2021-06-01T07:08:54Z")

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I am sure it is easy/simple, but I am stuck how to exactly word the question. I am needing to send ascii codes in a message, together with normal characters. How do I combine them two types to one message? Say I want …

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## [Error while executing code with function node](https://discourse.nodered.org/t/error-while-executing-code-with-function-node/46443)

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**Author:** [@vinaysudani](https://discourse.nodered.org/u/vinaysudani)\
**Replies:** 8\
**Last updated:** [1 June 2021 06:32 UTC](https://discourse.nodered.org/t/error-while-executing-code-with-function-node/46443 "2021-06-01T06:32:48Z")

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I am facing an issue using a third-party library "danfojs-node" with a function node. I am running this snippet with node.js and it produces the expected result. Code: const dfd = require("danfojs-node"); json\_data = …

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## [Asking: How to export GROUPS](https://discourse.nodered.org/t/asking-how-to-export-groups/46531)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 2\
**Last updated:** [1 June 2021 00:20 UTC](https://discourse.nodered.org/t/asking-how-to-export-groups/46531 "2021-06-01T00:20:17Z")

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I have a group made of some nodes. I want to export it. Is it simply a case of clicking on the group boundary and exporting? I know this is a dumb question - but don't forget who's asking the question. (The village's…

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## [Project Guidance - BLE - BT wrist device - Android](https://discourse.nodered.org/t/project-guidance-ble-bt-wrist-device-android/46527)

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**Author:** [@pw44](https://discourse.nodered.org/u/pw44)\
**Replies:** 0\
**Last updated:** [31 May 2021 22:06 UTC](https://discourse.nodered.org/t/project-guidance-ble-bt-wrist-device-android/46527 "2021-05-31T22:06:08Z")

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Dear @ll, i'm a complete newbie and am trying to build a proof of concept. My idea is having a fitbit device or other bluetooth wrist device node for reading : .. HR - BPM, -- SPO2 -- body temperature, -- ECG and…

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## [Calculate the time of operation between ON and OFF given Boolean](https://discourse.nodered.org/t/calculate-the-time-of-operation-between-on-and-off-given-boolean/46494)

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**Author:** [@nguyenthanhhau-cqu](https://discourse.nodered.org/u/nguyenthanhhau-cqu)\
**Replies:** 5\
**Last updated:** [31 May 2021 20:22 UTC](https://discourse.nodered.org/t/calculate-the-time-of-operation-between-on-and-off-given-boolean/46494 "2021-05-31T20:22:54Z")

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I assumed, there are 2 button ON and OFF. When user click on ON, it will return an array contains a variable "button=True", and when they click on OFF, it returns a variable "button=False". My questions is how to calcula…

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## [Storing timestamp](https://discourse.nodered.org/t/storing-timestamp/46501)

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**Author:** [@OmkarNodered](https://discourse.nodered.org/u/OmkarNodered)\
**Replies:** 2\
**Last updated:** [31 May 2021 20:19 UTC](https://discourse.nodered.org/t/storing-timestamp/46501 "2021-05-31T20:19:40Z")

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Hello, I want to store time stamp after data get stored into csv file so, How do I create timestamp and store it along with data in csv file?

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## [Unable to install node-red-node-arduino](https://discourse.nodered.org/t/unable-to-install-node-red-node-arduino/46257)

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**Author:** [@Tsarkasm](https://discourse.nodered.org/u/Tsarkasm)\
**Replies:** 10\
**Last updated:** [31 May 2021 20:18 UTC](https://discourse.nodered.org/t/unable-to-install-node-red-node-arduino/46257 "2021-05-31T20:18:37Z")

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I'm completely new to Node Red and I'm having a bit of trouble managing palettes (Node Red is running locally). While trying to install node-red-node-arduino it fails and I'm left with the following log, could someone sh…

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## [Best place to share NodeRed expertise](https://discourse.nodered.org/t/best-place-to-share-nodered-expertise/46474)

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**Author:** [@igorluzhanskiy](https://discourse.nodered.org/u/igorluzhanskiy)\
**Replies:** 4\
**Last updated:** [31 May 2021 14:24 UTC](https://discourse.nodered.org/t/best-place-to-share-nodered-expertise/46474 "2021-05-31T14:24:40Z")

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Hi Community, My team has gained a lot of expertise and knowledge in Enterprise NodeRed usage, which could be relevant both for developers and customers. What could be the best blogs/resources to share that expertise ?

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## [Error : CRC error in Modbus read node](https://discourse.nodered.org/t/error-crc-error-in-modbus-read-node/46146)

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**Author:** [@Josh](https://discourse.nodered.org/u/Josh)\
**Replies:** 1\
**Last updated:** [31 May 2021 13:56 UTC](https://discourse.nodered.org/t/error-crc-error-in-modbus-read-node/46146 "2021-05-31T13:56:24Z")

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I am trying to read Energy Meter values using the Modbus read node. But I get this CRC Error. Can anyone help fix this?? Below is my flow and configuration. Urgent help in this. Please respond as soon as you can. \[{"id…

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## [AES-CTR decryption](https://discourse.nodered.org/t/aes-ctr-decryption/46509)

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**Author:** [@DuncanCT](https://discourse.nodered.org/u/DuncanCT)\
**Replies:** 0\
**Last updated:** [31 May 2021 13:20 UTC](https://discourse.nodered.org/t/aes-ctr-decryption/46509 "2021-05-31T13:20:39Z")

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I'm having problems decoding specific AES messages. Used this site for testing... AES Encryption: Encrypt and decrypt online — Cryptii - result of encrypting (4d 65 73 73 61 67 65 = 4a 9b 9c 07 80 b2 66) Setting: Algo…

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## [How to find data?](https://discourse.nodered.org/t/how-to-find-data/46488)

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**Author:** [@Kartiknodered](https://discourse.nodered.org/u/Kartiknodered)\
**Replies:** 1\
**Last updated:** [31 May 2021 11:18 UTC](https://discourse.nodered.org/t/how-to-find-data/46488 "2021-05-31T11:18:06Z")

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How to find data in mongoDB using mongoDB 2 Node. I am able to insert data but can't find. Please help

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## [Start a exe on other PC conected with network](https://discourse.nodered.org/t/start-a-exe-on-other-pc-conected-with-network/46495)

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**Author:** [@RaducuP](https://discourse.nodered.org/u/RaducuP)\
**Replies:** 9\
**Last updated:** [31 May 2021 11:00 UTC](https://discourse.nodered.org/t/start-a-exe-on-other-pc-conected-with-network/46495 "2021-05-31T11:00:18Z")

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Hello, i want to start a .exe file from Node Red to other PC(not the one that i am working normally), they are connected on local network and i have admin rights on that station. Do you know a solution? Is there anyone t…

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## [Emberplus Control](https://discourse.nodered.org/t/emberplus-control/46500)

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**Author:** [@ceejm1](https://discourse.nodered.org/u/ceejm1)\
**Replies:** 2\
**Last updated:** [31 May 2021 10:06 UTC](https://discourse.nodered.org/t/emberplus-control/46500 "2021-05-31T10:06:59Z")

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Hello, Has anyone succesfully controlled any brodacast equipmnent using the ember+ protocol using node red? I have found the emberplus node but am stuck at how to initiate a matrix crosspoint. Thanks James

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## [Socket.io node connection error](https://discourse.nodered.org/t/socket-io-node-connection-error/46502)

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**Author:** [@Kartiknodered](https://discourse.nodered.org/u/Kartiknodered)\
**Replies:** 1\
**Last updated:** [31 May 2021 10:02 UTC](https://discourse.nodered.org/t/socket-io-node-connection-error/46502 "2021-05-31T10:02:58Z")

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Hii Guys , Can you Help me out with this? I am getting an error an error while i use Socket.io node. I am send you the Screen shot below.

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## [Alarm on Dashboard](https://discourse.nodered.org/t/alarm-on-dashboard/46496)

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**Author:** [@trintp1999](https://discourse.nodered.org/u/trintp1999)\
**Replies:** 1\
**Last updated:** [31 May 2021 09:48 UTC](https://discourse.nodered.org/t/alarm-on-dashboard/46496 "2021-05-31T09:48:10Z")

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Hi all, I have a value named "humid". when humid \> 70, I wanna have a notification on the top right with the message: " High humid ". Please help me to do that. Thank you

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## [How to get the json format information of all nodes](https://discourse.nodered.org/t/how-to-get-the-json-format-information-of-all-nodes/46486)

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**Author:** [@lei1](https://discourse.nodered.org/u/lei1)\
**Replies:** 1\
**Last updated:** [31 May 2021 09:00 UTC](https://discourse.nodered.org/t/how-to-get-the-json-format-information-of-all-nodes/46486 "2021-05-31T09:00:17Z")

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Hi, How to automatically collect all node information and print it to the console, (define a function node to do this instead of manually clicking the export button in the upper right corner)

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## [Function to extract details from nested objects](https://discourse.nodered.org/t/function-to-extract-details-from-nested-objects/46267)

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**Author:** [@kelster101757](https://discourse.nodered.org/u/kelster101757)\
**Replies:** 6\
**Last updated:** [31 May 2021 08:07 UTC](https://discourse.nodered.org/t/function-to-extract-details-from-nested-objects/46267 "2021-05-31T08:07:49Z")

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Hello all, I want to create a Function to extract id and last\_seen from the object below but im not sure how to get the 2nd object out. For example, would expect to write msg.payload = \[ { measurement: msg.pyaloa…

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## [How to change this object](https://discourse.nodered.org/t/how-to-change-this-object/46395)

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**Author:** [@ketpa](https://discourse.nodered.org/u/ketpa)\
**Replies:** 5\
**Last updated:** [31 May 2021 07:19 UTC](https://discourse.nodered.org/t/how-to-change-this-object/46395 "2021-05-31T07:19:59Z")

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I have this but I want object like this: t10001 : -32767 t10002 : 0 ect

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## [IFM VSE150 Vibration Sensor](https://discourse.nodered.org/t/ifm-vse150-vibration-sensor/46484)

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**Author:** [@fikrinizargustiyana](https://discourse.nodered.org/u/fikrinizargustiyana)\
**Replies:** 0\
**Last updated:** [31 May 2021 03:24 UTC](https://discourse.nodered.org/t/ifm-vse150-vibration-sensor/46484 "2021-05-31T03:24:19Z")

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Has anyone here ever used node-red for the IFM VSE150 Vibration sensor? I find it difficult to retrieve data on the sensor using modbus TCP... please help..

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## [Automatically key insert](https://discourse.nodered.org/t/automatically-key-insert/46482)

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**Author:** [@maiconcarlosp](https://discourse.nodered.org/u/maiconcarlosp)\
**Replies:** 2\
**Last updated:** [31 May 2021 01:55 UTC](https://discourse.nodered.org/t/automatically-key-insert/46482 "2021-05-31T01:55:19Z")

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How may I insert automatically this object information to create new keys. Value to be automatically insert, value of payload.measurementTypeCode I tried this below, but return an error: expected ":" and instead saw …

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## [Calculate average value of sensors](https://discourse.nodered.org/t/calculate-average-value-of-sensors/46471)

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**Author:** [@Pronta](https://discourse.nodered.org/u/Pronta)\
**Replies:** 3\
**Last updated:** [30 May 2021 22:01 UTC](https://discourse.nodered.org/t/calculate-average-value-of-sensors/46471 "2021-05-30T22:01:28Z")

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## [Query several Modbus meter by RS485 RTU](https://discourse.nodered.org/t/query-several-modbus-meter-by-rs485-rtu/46478)

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**Author:** [@Becker](https://discourse.nodered.org/u/Becker)\
**Replies:** 0\
**Last updated:** [30 May 2021 21:23 UTC](https://discourse.nodered.org/t/query-several-modbus-meter-by-rs485-rtu/46478 "2021-05-30T21:23:32Z")

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Hi, is it possible to query 2-16 Modbus meter (SDM630 Modbus V2) in Node-Red without a TCP Gateway? instead of the gateway: I would use a RS485 Hat like this: but I am not sure if it is possible to query 2-16 met…

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## [How to get global variable properties](https://discourse.nodered.org/t/how-to-get-global-variable-properties/9340)

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**Author:** [@aargollo](https://discourse.nodered.org/u/aargollo)\
**Replies:** 35\
**Last updated:** [30 May 2021 21:06 UTC](https://discourse.nodered.org/t/how-to-get-global-variable-properties/9340 "2021-05-30T21:06:49Z")

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Hi guys, I working on my device and I have doubts how to working with context global variable object properties. You can see bellow my global context variable: My global variable object and properties I was use this …

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## [Remember report by exception after deploy](https://discourse.nodered.org/t/remember-report-by-exception-after-deploy/46364)

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**Author:** [@psalibe](https://discourse.nodered.org/u/psalibe)\
**Replies:** 5\
**Last updated:** [30 May 2021 17:12 UTC](https://discourse.nodered.org/t/remember-report-by-exception-after-deploy/46364 "2021-05-30T17:12:37Z")

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Hi All, I have a general runtime variable that sends a 1 when it is on and a 0 when the power off is requested. I have a report by exception node that will not send multiple 1's when it has been on, but this resets afte…

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## [Can I connect 8 MAX31865 to raspberry Pi using Node-RED?](https://discourse.nodered.org/t/can-i-connect-8-max31865-to-raspberry-pi-using-node-red/46463)

<div class="topic-metadata">

**Author:** [@dhia333](https://discourse.nodered.org/u/dhia333)\
**Replies:** 3\
**Last updated:** [30 May 2021 17:00 UTC](https://discourse.nodered.org/t/can-i-connect-8-max31865-to-raspberry-pi-using-node-red/46463 "2021-05-30T17:00:20Z")

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Hi I'm new to raspberry Pi and node-RED and I need to connect 8 Pt 100 sensors to Raspberry Pi using 8 MAX 31865 chips (with SPI protocol) and MAX 31865 node. Does this node let you use 8 GPIO pins to select one chip at …

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