# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=530

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

**Page:** 531

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## [How to install NodeRed with a zip file](https://discourse.nodered.org/t/how-to-install-nodered-with-a-zip-file/47779)

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**Author:** [@bfxnapnxpv](https://discourse.nodered.org/u/bfxnapnxpv)\
**Replies:** 1\
**Last updated:** [29 June 2021 09:09 UTC](https://discourse.nodered.org/t/how-to-install-nodered-with-a-zip-file/47779 "2021-06-29T09:09:35Z")

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We have a special image of Raspbian, with all prerequisites (e.g. apache2, mariadb, php73, node.js etc. pp.) We have an installier file (.deb) which can be used with APT or download directly with "wget" then install wit…

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## [Formula con nodo function](https://discourse.nodered.org/t/formula-con-nodo-function/47575)

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**Author:** [@davidfigueroa](https://discourse.nodered.org/u/davidfigueroa)\
**Replies:** 3\
**Last updated:** [29 June 2021 09:03 UTC](https://discourse.nodered.org/t/formula-con-nodo-function/47575 "2021-06-29T09:03:12Z")

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How can I create this formula with a function node

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## [Node-RED v0.19.4 3 minute delay during startup on windows](https://discourse.nodered.org/t/node-red-v0-19-4-3-minute-delay-during-startup-on-windows/3798)

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**Author:** [@Lace](https://discourse.nodered.org/u/Lace)\
**Replies:** 17\
**Last updated:** [29 June 2021 08:13 UTC](https://discourse.nodered.org/t/node-red-v0-19-4-3-minute-delay-during-startup-on-windows/3798 "2021-06-29T08:13:19Z")

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On windows I experience long startup delays of up to 3 minutes between Node-RED start and "Loading palette nodes" log message. Welcome to Node-RED 8 Oct. 16:07:02 - \[info\] Node-RED version v0.19.4 8 Oct. 16:07:02 - \[in…

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## [Checking status of sensor](https://discourse.nodered.org/t/checking-status-of-sensor/47772)

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**Author:** [@subwayfootlong](https://discourse.nodered.org/u/subwayfootlong)\
**Replies:** 3\
**Last updated:** [29 June 2021 08:11 UTC](https://discourse.nodered.org/t/checking-status-of-sensor/47772 "2021-06-29T08:11:54Z")

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Hello all, I want to ask what would be the best way to achieve my this desired outcome using red. A sensor is outputting information every second. If the sensor is off, it would not have any output. After 5 seconds …

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## [Bluetooth signal strength phone](https://discourse.nodered.org/t/bluetooth-signal-strength-phone/47755)

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**Author:** [@Duncan](https://discourse.nodered.org/u/Duncan)\
**Replies:** 1\
**Last updated:** [29 June 2021 04:56 UTC](https://discourse.nodered.org/t/bluetooth-signal-strength-phone/47755 "2021-06-29T04:56:49Z")

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I have been trying to get bluetooth working with my phone, nothing seems to work properly. Sure there are nodes which indicate true or false if phone is in range. What I would like to do is measure the signal strength of…

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## [Unable to Upload to Firebase Storage](https://discourse.nodered.org/t/unable-to-upload-to-firebase-storage/47766)

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**Author:** [@JasonW](https://discourse.nodered.org/u/JasonW)\
**Replies:** 0\
**Last updated:** [29 June 2021 04:06 UTC](https://discourse.nodered.org/t/unable-to-upload-to-firebase-storage/47766 "2021-06-29T04:06:02Z")

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I am trying to use node-red-contrib-firebase-storage to upload images from local storage to Firebase Storage. However, the status of the upload node will keep show uploading. The variable that I send into the upload node…

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## [UDP 3 Signals but i can displayed only 1 signal](https://discourse.nodered.org/t/udp-3-signals-but-i-can-displayed-only-1-signal/47618)

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**Author:** [@PNWw](https://discourse.nodered.org/u/PNWw)\
**Replies:** 11\
**Last updated:** [29 June 2021 02:21 UTC](https://discourse.nodered.org/t/udp-3-signals-but-i-can-displayed-only-1-signal/47618 "2021-06-29T02:21:51Z")

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i just have sensor and they send 3 signals output but i cant displayed all signal.I only display only 1 signal.

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## [Function node efficiency](https://discourse.nodered.org/t/function-node-efficiency/47728)

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**Author:** [@tmichaeltx](https://discourse.nodered.org/u/tmichaeltx)\
**Replies:** 5\
**Last updated:** [29 June 2021 01:55 UTC](https://discourse.nodered.org/t/function-node-efficiency/47728 "2021-06-29T01:55:44Z")

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I understand generally that function nodes are less efficient than doing the same change via built in nodes. I am thinking about a situation with 2 flow 1a and 1b. 1a takes inputs processes it through a complex functi…

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## [Something wrong with the time](https://discourse.nodered.org/t/something-wrong-with-the-time/47740)

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**Author:** [@kamcio](https://discourse.nodered.org/u/kamcio)\
**Replies:** 9\
**Last updated:** [28 June 2021 20:43 UTC](https://discourse.nodered.org/t/something-wrong-with-the-time/47740 "2021-06-28T20:43:37Z")

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Hello, where is the mistake? I want, that every day at 9:00 am the dwd node check how many it will be rain in the next 24h and turn on / off the pump but how You can see, nothing has happened today at 9:00 am. What cou…

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## [Payload message object key with a space?](https://discourse.nodered.org/t/payload-message-object-key-with-a-space/47757)

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**Author:** [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\
**Replies:** 2\
**Last updated:** [28 June 2021 20:38 UTC](https://discourse.nodered.org/t/payload-message-object-key-with-a-space/47757 "2021-06-28T20:38:10Z")

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Payload message object key with a space? Got a python script that sends MQTT data and one of the keys in the resulting JavaScript object (via JSON) has spaces in the key string. So, "System Up TIme: XXXXX" versus "Syst…

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## [Optimizing Switch Nodes / OPCUA](https://discourse.nodered.org/t/optimizing-switch-nodes-opcua/46524)

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**Author:** [@psalibe](https://discourse.nodered.org/u/psalibe)\
**Replies:** 28\
**Last updated:** [28 June 2021 19:57 UTC](https://discourse.nodered.org/t/optimizing-switch-nodes-opcua/46524 "2021-06-28T19:57:39Z")

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I have a general question about the capabilities of the switch node. For example, in the screenshot attached, I am sending just about all of my OPC info through one READ node that then goes to a switch node, and using br…

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## [Virtual keyboard using HID gadget](https://discourse.nodered.org/t/virtual-keyboard-using-hid-gadget/47255)

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**Author:** [@injector22](https://discourse.nodered.org/u/injector22)\
**Replies:** 2\
**Last updated:** [28 June 2021 19:29 UTC](https://discourse.nodered.org/t/virtual-keyboard-using-hid-gadget/47255 "2021-06-28T19:29:27Z")

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I know this is somewhat out of the realm of node-red but I figured I don't lose anything by asking. I'm using node-red to send HID (keyboard/mouse) commands to a host device. I used the project below to enable HID mode…

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## [Remove expiration from JWT](https://discourse.nodered.org/t/remove-expiration-from-jwt/47750)

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**Author:** [@torrent](https://discourse.nodered.org/u/torrent)\
**Replies:** 2\
**Last updated:** [28 June 2021 18:36 UTC](https://discourse.nodered.org/t/remove-expiration-from-jwt/47750 "2021-06-28T18:36:03Z")

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I am trying to create jwt from json data. The problem is, I am using this node and it always creates a jwt with iat (issue at) and exp (expiration) like this: Question is: how can I remove iat and exp from jwt?

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## [ASCII Input for MQTT-In](https://discourse.nodered.org/t/ascii-input-for-mqtt-in/47719)

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**Author:** [@klaus123](https://discourse.nodered.org/u/klaus123)\
**Replies:** 9\
**Last updated:** [28 June 2021 16:59 UTC](https://discourse.nodered.org/t/ascii-input-for-mqtt-in/47719 "2021-06-28T16:59:07Z")

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Hello I have (probably) a quite basic problem as i am not very deep in NR so far. I hope this is the right category. I want to controll my Wallbox with RS485-ASCII interface via a converter (PW21) and Node Red The Co…

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## [How to put msg.payload in a variable in Python to use it to be displayed on a LCD 16x2 Screen](https://discourse.nodered.org/t/how-to-put-msg-payload-in-a-variable-in-python-to-use-it-to-be-displayed-on-a-lcd-16x2-screen/47474)

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**Author:** [@Gureggru](https://discourse.nodered.org/u/Gureggru)\
**Replies:** 5\
**Last updated:** [28 June 2021 16:32 UTC](https://discourse.nodered.org/t/how-to-put-msg-payload-in-a-variable-in-python-to-use-it-to-be-displayed-on-a-lcd-16x2-screen/47474 "2021-06-28T16:32:06Z")

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Hello, I'm sorry to ask such Noob questions here, but I am a IT student and we have a branch about creating a project with Node Red and a Raspberry Pi. First of all we simulate a Glasshouse where we check every minute th…

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## [SQLite Node good practices](https://discourse.nodered.org/t/sqlite-node-good-practices/47747)

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**Author:** [@ramoncavaco](https://discourse.nodered.org/u/ramoncavaco)\
**Replies:** 0\
**Last updated:** [28 June 2021 12:44 UTC](https://discourse.nodered.org/t/sqlite-node-good-practices/47747 "2021-06-28T12:44:19Z")

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Hello! Are the node-red-node-sqlite requests queued or concurrent? Any tips on best practices using this node? Any examples on how to safely queue commands?

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## [Beaglebone green wireless gateway](https://discourse.nodered.org/t/beaglebone-green-wireless-gateway/47737)

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**Author:** [@Aivaras](https://discourse.nodered.org/u/Aivaras)\
**Replies:** 2\
**Last updated:** [28 June 2021 12:12 UTC](https://discourse.nodered.org/t/beaglebone-green-wireless-gateway/47737 "2021-06-28T12:12:59Z")

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Hello, Can someone write a script to function block to read analog value using A0 pin ? Johhny5 function blocks crashes my node-red Best regards Aivaras

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## [Formatting data to excel](https://discourse.nodered.org/t/formatting-data-to-excel/47533)

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**Author:** [@Duncan](https://discourse.nodered.org/u/Duncan)\
**Replies:** 4\
**Last updated:** [28 June 2021 12:11 UTC](https://discourse.nodered.org/t/formatting-data-to-excel/47533 "2021-06-28T12:11:01Z")

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good afternoon all, I need a little help with formatting the data in the attached pic to a readble EXCEL format. thanks

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## [How to change the button node name?](https://discourse.nodered.org/t/how-to-change-the-button-node-name/47727)

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**Author:** [@jlian168](https://discourse.nodered.org/u/jlian168)\
**Replies:** 17\
**Last updated:** [28 June 2021 10:07 UTC](https://discourse.nodered.org/t/how-to-change-the-button-node-name/47727 "2021-06-28T10:07:51Z")

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Dear All : How to change? Like red circle "switch" chane to another name? Can or not? Thank u.

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## [Hall magnetic sensor KY-003 signal in Dashboard](https://discourse.nodered.org/t/hall-magnetic-sensor-ky-003-signal-in-dashboard/47463)

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**Author:** [@Blu3](https://discourse.nodered.org/u/Blu3)\
**Replies:** 8\
**Last updated:** [28 June 2021 09:36 UTC](https://discourse.nodered.org/t/hall-magnetic-sensor-ky-003-signal-in-dashboard/47463 "2021-06-28T09:36:44Z")

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Hello everyone, iam new in the Node-RED community and an absolute beginner in programming (which i want to change). At the moment i have my Raspberry and a KY-003 hall magnetic sensor. The connection to the Raspberry i…

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## [Ask : two node to one function?](https://discourse.nodered.org/t/ask-two-node-to-one-function/47736)

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**Author:** [@jlian168](https://discourse.nodered.org/u/jlian168)\
**Replies:** 9\
**Last updated:** [28 June 2021 09:36 UTC](https://discourse.nodered.org/t/ask-two-node-to-one-function/47736 "2021-06-28T09:36:23Z")

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Dear All : The switch has topic is no2\_pn, but hv error...why? In the code Line 20 that is correct? Or in the code has another error? Thank u.

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## [How many msg.name?](https://discourse.nodered.org/t/how-many-msg-name/47726)

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**Author:** [@jlian168](https://discourse.nodered.org/u/jlian168)\
**Replies:** 8\
**Last updated:** [28 June 2021 07:15 UTC](https://discourse.nodered.org/t/how-many-msg-name/47726 "2021-06-28T07:15:06Z")

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Dear All : how many msg.name? and how to use? Thank u.

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## [How to deleted it?](https://discourse.nodered.org/t/how-to-deleted-it/47723)

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**Author:** [@jlian168](https://discourse.nodered.org/u/jlian168)\
**Replies:** 3\
**Last updated:** [28 June 2021 06:52 UTC](https://discourse.nodered.org/t/how-to-deleted-it/47723 "2021-06-28T06:52:36Z")

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Dear All : How to deleted red circle data? Thank u.

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## [Email node configuration by input message](https://discourse.nodered.org/t/email-node-configuration-by-input-message/47670)

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**Author:** [@Swen](https://discourse.nodered.org/u/Swen)\
**Replies:** 4\
**Last updated:** [28 June 2021 06:49 UTC](https://discourse.nodered.org/t/email-node-configuration-by-input-message/47670 "2021-06-28T06:49:04Z")

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Hi and "moin moin" to everybody. This is my first entry in this user forum. I seriously played around wih node-red for a few months now. I developed several flows with an email sending node from the "node-red-node-ema…

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## [Node prometheus export - Values from Temp sensors on Arduino](https://discourse.nodered.org/t/node-prometheus-export-values-from-temp-sensors-on-arduino/47529)

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**Author:** [@mluz](https://discourse.nodered.org/u/mluz)\
**Replies:** 4\
**Last updated:** [28 June 2021 06:35 UTC](https://discourse.nodered.org/t/node-prometheus-export-values-from-temp-sensors-on-arduino/47529 "2021-06-28T06:35:21Z")

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I'am using Node-Red V1.3.5 on Windows10. I'am collecting values from a temperature sensor taken from Arduino. Its easy to collect values from Serialport to Node-Red. But I really can't understand how to configure "No…

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## [Some usage issues with Node-Red1.3.3](https://discourse.nodered.org/t/some-usage-issues-with-node-red1-3-3/47461)

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**Author:** [@MaoMao](https://discourse.nodered.org/u/MaoMao)\
**Replies:** 14\
**Last updated:** [28 June 2021 06:23 UTC](https://discourse.nodered.org/t/some-usage-issues-with-node-red1-3-3/47461 "2021-06-28T06:23:48Z")

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Recently I had a problem. My interface was always disconnected. I don't know what caused this phenomenon, and I don't know if anyone else had similar problems. I use PM2 to control Node-red on a centos7 system. I see in…

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## [Compare Variables](https://discourse.nodered.org/t/compare-variables/47713)

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**Author:** [@Automationguy](https://discourse.nodered.org/u/Automationguy)\
**Replies:** 4\
**Last updated:** [27 June 2021 22:22 UTC](https://discourse.nodered.org/t/compare-variables/47713 "2021-06-27T22:22:32Z")

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Hi All, Complete newbie to node red, so please excuse my basic question. I have a variable I’m converting to a message. If 0 == message 1 If \< 20 message 2 If \> 20 message 3 The problem I have is I don’t want to in…

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## [Retaining last payload](https://discourse.nodered.org/t/retaining-last-payload/47714)

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**Author:** [@Automationguy](https://discourse.nodered.org/u/Automationguy)\
**Replies:** 1\
**Last updated:** [27 June 2021 20:58 UTC](https://discourse.nodered.org/t/retaining-last-payload/47714 "2021-06-27T20:58:05Z")

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Hi all, I have a tcp modbus device that communicates to other devices via rf. on occasion we have rf interference causing communication dropouts. Each payload is sent to a cloud. When the drop out occurs msg.payload w…

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## [PWM fan control over GPIO](https://discourse.nodered.org/t/pwm-fan-control-over-gpio/47682)

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**Author:** [@Becker](https://discourse.nodered.org/u/Becker)\
**Replies:** 5\
**Last updated:** [27 June 2021 20:30 UTC](https://discourse.nodered.org/t/pwm-fan-control-over-gpio/47682 "2021-06-27T20:30:01Z")

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Hi, i want to obstruct the originally pwm fan you can activate it by OS, but only on/off at 60°C over pwm gpio. can I set the pwm by using gpio out: I'm not sure, because you should only set it up to a maximum of …

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## [Fail to start nodered.service on raspberry pi](https://discourse.nodered.org/t/fail-to-start-nodered-service-on-raspberry-pi/47668)

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**Author:** [@2E3](https://discourse.nodered.org/u/2E3)\
**Replies:** 6\
**Last updated:** [27 June 2021 20:29 UTC](https://discourse.nodered.org/t/fail-to-start-nodered-service-on-raspberry-pi/47668 "2021-06-27T20:29:50Z")

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Hi, I am having some issues with the nodered.service Node-RED version: v1.3.5 Node.js version: v14.17.0 Linux 5.4.51+ arm LE raspberry pi Zero W I can start node-red-pi as user (2E3) without problems. However whe…

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