# Hardware

**URL:** https://discourse.nodered.org/c/hardware/16.md?page=12

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

**Page:** 13

---

## [Sonoff TX 2 channel](https://discourse.nodered.org/t/sonoff-tx-2-channel/30986)

<div class="topic-metadata">

**Author:** [@OddDave](https://discourse.nodered.org/u/OddDave)\
**Replies:** 3\
**Last updated:** [1 August 2020 15:10 UTC](https://discourse.nodered.org/t/sonoff-tx-2-channel/30986 "2020-08-01T15:10:27Z")

</div>

I just installed a new Sonoff TX 2 channel switch, which I flashed with Tasmota. The MQTT topic is Metal. I can turn the two channels on and off by the web server. I see in the console that the MQTT topic for channel 1…

---

## [Cannot read data by MODBUS RTU](https://discourse.nodered.org/t/cannot-read-data-by-modbus-rtu/30840)

<div class="topic-metadata">

**Author:** [@mrino1000](https://discourse.nodered.org/u/mrino1000)\
**Replies:** 9\
**Last updated:** [29 July 2020 07:10 UTC](https://discourse.nodered.org/t/cannot-read-data-by-modbus-rtu/30840 "2020-07-29T07:10:44Z")

</div>

Sensor manual The sensor manual is shared above. I want to communicate with it through Modbus RTU node. My code is given below: \[{"id":"5f61c311.3e5d1c","type":"tab","label":"Flow 1","disabled":false,"info":""},{"id":"…

---

## [How to control a Brushless DC Motor?](https://discourse.nodered.org/t/how-to-control-a-brushless-dc-motor/30306)

<div class="topic-metadata">

**Author:** [@brunozanardi](https://discourse.nodered.org/u/brunozanardi)\
**Replies:** 19\
**Last updated:** [28 July 2020 23:32 UTC](https://discourse.nodered.org/t/how-to-control-a-brushless-dc-motor/30306 "2020-07-28T23:32:56Z")

</div>

Hello group, I'm trying to control a Brushless DC motor with a ESC using Node Red in my Raspberry Pi 3b+, but until now I've not been sucessfull :disappointed\_relieved: My node is very simple, only a PWM output to a Ra…

---

## [Alternatives to Raspberry Pi?](https://discourse.nodered.org/t/alternatives-to-raspberry-pi/30678)

<div class="topic-metadata">

**Author:** [@dr\_cave\_dweller](https://discourse.nodered.org/u/dr_cave_dweller)\
**Replies:** 11\
**Last updated:** [26 July 2020 07:54 UTC](https://discourse.nodered.org/t/alternatives-to-raspberry-pi/30678 "2020-07-26T07:54:57Z")

</div>

Hi all, I am looking for some Linux alternatives to Raspberry Pi/Raspbian that are known to be able to run Node-Red. Currently using a Raspberry Pi 4 with 4GB RAM and it is fine, but it is a bit "hobbyist' and I want t…

---

## [Quick note if you're a) reading multiple ds18b20's with a raspberry pi and b) struggling with flow stalls](https://discourse.nodered.org/t/quick-note-if-youre-a-reading-multiple-ds18b20s-with-a-raspberry-pi-and-b-struggling-with-flow-stalls/25747)

<div class="topic-metadata">

**Author:** [@jcims](https://discourse.nodered.org/u/jcims)\
**Replies:** 21\
**Last updated:** [25 July 2020 16:09 UTC](https://discourse.nodered.org/t/quick-note-if-youre-a-reading-multiple-ds18b20s-with-a-raspberry-pi-and-b-struggling-with-flow-stalls/25747 "2020-07-25T16:09:30Z")

</div>

I'd been using the node-red-contrib-ds18b20-sensor node to read 4 ds18b20's directly from gpio4 on my raspberry pi. Unfortunately this seemed to cause the flow to stall for 2-3 seconds while the pi was bit banging the 1…

---

## [Help cleaning up data from DHT11 sensor with Arduino](https://discourse.nodered.org/t/help-cleaning-up-data-from-dht11-sensor-with-arduino/29677)

<div class="topic-metadata">

**Author:** [@keithfm](https://discourse.nodered.org/u/keithfm)\
**Replies:** 2\
**Last updated:** [23 July 2020 20:16 UTC](https://discourse.nodered.org/t/help-cleaning-up-data-from-dht11-sensor-with-arduino/29677 "2020-07-23T20:16:40Z")

</div>

Hello, I am trying to make an application that sends the temperature and humidity of a room via telegram. I have a telegram bot in another node, but I can't seem to get the basics right. I used this code for getting the…

---

## [Node Red on Polisy by Universal Devices](https://discourse.nodered.org/t/node-red-on-polisy-by-universal-devices/30565)

<div class="topic-metadata">

**Author:** [@TriLife](https://discourse.nodered.org/u/TriLife)\
**Replies:** 2\
**Last updated:** [22 July 2020 18:09 UTC](https://discourse.nodered.org/t/node-red-on-polisy-by-universal-devices/30565 "2020-07-22T18:09:35Z")

</div>

Greetings from sunny and locked down Colombia! I have a home with 98 sonoff switches (and growing). Trying to get this onto a server located at home, rather than in China. Since I already have a Universal Devices ISY9…

---

## [Node-red-contrib-lcd20x4-i2c orange pi zero info](https://discourse.nodered.org/t/node-red-contrib-lcd20x4-i2c-orange-pi-zero-info/30320)

<div class="topic-metadata">

**Author:** [@88bit](https://discourse.nodered.org/u/88bit)\
**Replies:** 0\
**Last updated:** [19 July 2020 02:43 UTC](https://discourse.nodered.org/t/node-red-contrib-lcd20x4-i2c-orange-pi-zero-info/30320 "2020-07-19T02:43:50Z")

</div>

Hi all this is just a note for every one which may encounters this problem. even so it is quite a simple problem it took me some time to work this out. I have a cheap 4 x 20 LCD around $8 which I connected to my orange …

---

## [Sound Sensors and Program needed](https://discourse.nodered.org/t/sound-sensors-and-program-needed/6303)

<div class="topic-metadata">

**Author:** [@anonyy](https://discourse.nodered.org/u/anonyy)\
**Replies:** 10\
**Last updated:** [12 July 2020 19:56 UTC](https://discourse.nodered.org/t/sound-sensors-and-program-needed/6303 "2020-07-12T19:56:29Z")

</div>

Hi Im doing a school project about a sound sensors which rings when it reaches the decibel programmed on it. And i want to attache a display board on it, when the bell rings i can see a message on a display board. Can an…

---

## [Improved hardware support](https://discourse.nodered.org/t/improved-hardware-support/29643)

<div class="topic-metadata">

**Author:** [@ozpos](https://discourse.nodered.org/u/ozpos)\
**Replies:** 177\
**Last updated:** [11 July 2020 08:21 UTC](https://discourse.nodered.org/t/improved-hardware-support/29643 "2020-07-11T08:21:20Z")

</div>

---

## [MQTT Help and Advice](https://discourse.nodered.org/t/mqtt-help-and-advice/29705)

<div class="topic-metadata">

**Author:** [@swanside](https://discourse.nodered.org/u/swanside)\
**Replies:** 8\
**Last updated:** [10 July 2020 08:18 UTC](https://discourse.nodered.org/t/mqtt-help-and-advice/29705 "2020-07-10T08:18:21Z")

</div>

Hi All. I am looking at MQTT with not much knowledge, am I correct in thinking I need a MQTT Broker to connect devices over WIFI to my PI and read the values in Node Red? I will be looking at making or copying a few pro…

---

## [High Speed Counter](https://discourse.nodered.org/t/high-speed-counter/29718)

<div class="topic-metadata">

**Author:** [@BigWillow](https://discourse.nodered.org/u/BigWillow)\
**Replies:** 11\
**Last updated:** [9 July 2020 20:26 UTC](https://discourse.nodered.org/t/high-speed-counter/29718 "2020-07-09T20:26:24Z")

</div>

Hi I am planning for my wind speed project. I need to read a pulse frequency from a rotation counter, but I have done some bench testing using a function generator & the node-red-contrib-frequency-meter node, and it se…

---

## [Chamberlain MyQ integration changed](https://discourse.nodered.org/t/chamberlain-myq-integration-changed/29560)

<div class="topic-metadata">

**Author:** [@jtmoderate876](https://discourse.nodered.org/u/jtmoderate876)\
**Replies:** 2\
**Last updated:** [7 July 2020 12:15 UTC](https://discourse.nodered.org/t/chamberlain-myq-integration-changed/29560 "2020-07-07T12:15:41Z")

</div>

Years ago I integrated to Chamberlain MyQ garage door starting with the work of @nothingmn https://flows.nodered.org/flow/83f263d6f5f23e53e2aed85b96aadb3e This worked until 5/31/2020. Someone mentioned online that the…

---

## [Deconz zigbee install problems](https://discourse.nodered.org/t/deconz-zigbee-install-problems/29191)

<div class="topic-metadata">

**Author:** [@michaelkpierce](https://discourse.nodered.org/u/michaelkpierce)\
**Replies:** 3\
**Last updated:** [30 June 2020 17:49 UTC](https://discourse.nodered.org/t/deconz-zigbee-install-problems/29191 "2020-06-30T17:49:56Z")

</div>

I am able to get Node-Red to recognize the module, but it is only when the deCONZ application is running and it identifies it as Configuration tool 1 and does not identify any of the devices. I am running on a Raspberry…

---

## [Read USB keyboard or RFC reader connected to USB at the Raspi](https://discourse.nodered.org/t/read-usb-keyboard-or-rfc-reader-connected-to-usb-at-the-raspi/27846)

<div class="topic-metadata">

**Author:** [@stefan24](https://discourse.nodered.org/u/stefan24)\
**Replies:** 2\
**Last updated:** [30 June 2020 10:39 UTC](https://discourse.nodered.org/t/read-usb-keyboard-or-rfc-reader-connected-to-usb-at-the-raspi/27846 "2020-06-30T10:39:25Z")

</div>

I want to read a RFC tag with a RFC reader connected to my Raspberry Pi via USB. It acts like a keyboard with a 10-digit output on the active tty. How do I read that input with Node-RED? I saw a post on a Siemens foru…

---

## [Blind recommendations](https://discourse.nodered.org/t/blind-recommendations/28823)

<div class="topic-metadata">

**Author:** [@Roaders](https://discourse.nodered.org/u/Roaders)\
**Replies:** 5\
**Last updated:** [25 June 2020 19:04 UTC](https://discourse.nodered.org/t/blind-recommendations/28823 "2020-06-25T19:04:24Z")

</div>

Hi All I want to get some node-red (and Google assistant) controlled blinds. Does anyone have any UK recommendations? I have heard of blinds that last for 6 months on a single charge - that sounds great (but not sure i…

---

## [How to set a Room in Roomba?](https://discourse.nodered.org/t/how-to-set-a-room-in-roomba/28789)

<div class="topic-metadata">

**Author:** [@Mannshoch](https://discourse.nodered.org/u/Mannshoch)\
**Replies:** 4\
**Last updated:** [23 June 2020 12:27 UTC](https://discourse.nodered.org/t/how-to-set-a-room-in-roomba/28789 "2020-06-23T12:27:13Z")

</div>

I wish to set which room Roomba should clean. How do I setup a Room without the App? Is it may either possible to advice roomba to move to a certain XY coordinate?

---

## [New rpi video driver](https://discourse.nodered.org/t/new-rpi-video-driver/28698)

<div class="topic-metadata">

**Author:** [@gerry](https://discourse.nodered.org/u/gerry)\
**Replies:** 0\
**Last updated:** [21 June 2020 19:56 UTC](https://discourse.nodered.org/t/new-rpi-video-driver/28698 "2020-06-21T19:56:24Z")

</div>

In case you missed it there is a new video driver for the pi. Haven't used it so I can't comment on it.

---

## [NRF24 issues, output node cannot send packet](https://discourse.nodered.org/t/nrf24-issues-output-node-cannot-send-packet/20760)

<div class="topic-metadata">

**Author:** [@Mvogel](https://discourse.nodered.org/u/Mvogel)\
**Replies:** 1\
**Last updated:** [19 June 2020 03:44 UTC](https://discourse.nodered.org/t/nrf24-issues-output-node-cannot-send-packet/20760 "2020-06-19T03:44:28Z")

</div>

I am trying to make an NRF24 radio work using node-red-contrib-nrf24. One of the problems is that node status messages change to 'not working' after each deploy. I have to stop and restart node-red to make the nodes conn…

---

## [Node NCD-ADS1115 starts only if it is copy and pasted](https://discourse.nodered.org/t/node-ncd-ads1115-starts-only-if-it-is-copy-and-pasted/28541)

<div class="topic-metadata">

**Author:** [@ClemensSimon](https://discourse.nodered.org/u/ClemensSimon)\
**Replies:** 0\
**Last updated:** [18 June 2020 10:17 UTC](https://discourse.nodered.org/t/node-ncd-ads1115-starts-only-if-it-is-copy-and-pasted/28541 "2020-06-18T10:17:17Z")

</div>

2020-06-17T22:00:00Z (UTC) Dear all, hope you can help me. I m using Node -Red for a while now on the raspberry pi 4. I updated yesterday to the latest stable version by using your update script. My pi works in a tes…

---

## [NCD Sensors library](https://discourse.nodered.org/t/ncd-sensors-library/25996)

<div class="topic-metadata">

**Author:** [@Martin10](https://discourse.nodered.org/u/Martin10)\
**Replies:** 28\
**Last updated:** [13 June 2020 15:45 UTC](https://discourse.nodered.org/t/ncd-sensors-library/25996 "2020-06-13T15:45:09Z")

</div>

Hi, i found NCD Sensor library (https://flows.nodered.org/search?term=ncd). I read that these sensors use Digimesh, and because i don't have NCD i try to use my Xbee's, that also use Digimesh firmware, but i receive the …

---

## [Control Sengled E11-G23/E11-G33 with MQTT](https://discourse.nodered.org/t/control-sengled-e11-g23-e11-g33-with-mqtt/19169)

<div class="topic-metadata">

**Author:** [@Gehasi](https://discourse.nodered.org/u/Gehasi)\
**Replies:** 6\
**Last updated:** [15 December 2019 14:33 UTC](https://discourse.nodered.org/t/control-sengled-e11-g23-e11-g33-with-mqtt/19169 "2019-12-15T14:33:11Z")

</div>

Hi, im not getting my LED Bulb running with nodered. Maybe someone can help me..... First of all im running node-red on an raspi4 with zigbee2mqtt. I got my bulb paired with my zigbee stick, so there is allready commun…

---

## [DHT22 shows humidity after 2-3 days only 99.9%](https://discourse.nodered.org/t/dht22-shows-humidity-after-2-3-days-only-99-9/28004)

<div class="topic-metadata">

**Author:** [@Bambulko](https://discourse.nodered.org/u/Bambulko)\
**Replies:** 2\
**Last updated:** [8 June 2020 17:27 UTC](https://discourse.nodered.org/t/dht22-shows-humidity-after-2-3-days-only-99-9/28004 "2020-06-08T17:27:09Z")

</div>

DHT v. 1.0.4 1.0.6: Maintenance Release Runtime Update to JSONata 1.8.3 #2536 Handle clone of null in utils Editor Prevent button label wrapping in typedInput Handle error objects when reporting in palette manag…

---

## [Node Red on a PLC: Weidmüller Automation Controller](https://discourse.nodered.org/t/node-red-on-a-plc-weidmuller-automation-controller/27999)

<div class="topic-metadata">

**Author:** [@nygma2004](https://discourse.nodered.org/u/nygma2004)\
**Replies:** 0\
**Last updated:** [8 June 2020 15:36 UTC](https://discourse.nodered.org/t/node-red-on-a-plc-weidmuller-automation-controller/27999 "2020-06-08T15:36:20Z")

</div>

Hi Guys, I was not sure if this is new only to me or other as well, but I thought I share it. I have a Youtube channel and I get emails from various Chinese companies to review stuff, like security cameras, Sonoff devic…

---

## [Recycling Sky HDD's](https://discourse.nodered.org/t/recycling-sky-hdds/14754)

<div class="topic-metadata">

**Author:** [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)\
**Replies:** 3\
**Last updated:** [7 June 2020 18:35 UTC](https://discourse.nodered.org/t/recycling-sky-hdds/14754 "2020-06-07T18:35:22Z")

</div>

I'm building a new system from scratch to predominantly run node-RED, and needed a independently-powered HDD in preference to either a SD card, or a HDD sharing the same power supply as my Pi for resilience. Whilst look…

---

## [Xbee communication](https://discourse.nodered.org/t/xbee-communication/27485)

<div class="topic-metadata">

**Author:** [@Martin10](https://discourse.nodered.org/u/Martin10)\
**Replies:** 7\
**Last updated:** [7 June 2020 17:54 UTC](https://discourse.nodered.org/t/xbee-communication/27485 "2020-06-07T17:54:21Z")

</div>

Hi, is there any function that can i use, along with xbee lib, in order to obtain sensor data from wireless xbee?

---

## [Raspberry Pi 4 now available with 8GB](https://discourse.nodered.org/t/raspberry-pi-4-now-available-with-8gb/27418)

<div class="topic-metadata">

**Author:** [@ghayne](https://discourse.nodered.org/u/ghayne)\
**Replies:** 5\
**Last updated:** [30 May 2020 20:23 UTC](https://discourse.nodered.org/t/raspberry-pi-4-now-available-with-8gb/27418 "2020-05-30T20:23:24Z")

</div>

I have just had an email telling me that the Pi 4 is now available with 8GB. A bit pricey at £74 but might be of interest to some.

---

## [Why can't open the magnetic successfully, just can lock](https://discourse.nodered.org/t/why-cant-open-the-magnetic-successfully-just-can-lock/27475)

<div class="topic-metadata">

**Author:** [@lingzhongli](https://discourse.nodered.org/u/lingzhongli)\
**Replies:** 6\
**Last updated:** [29 May 2020 05:40 UTC](https://discourse.nodered.org/t/why-cant-open-the-magnetic-successfully-just-can-lock/27475 "2020-05-29T05:40:55Z")

</div>

this is the full flow \[{"id":"2f0108b5.890318","type":"tab","label":"VAES\_Project","disabled":false,"info":""},{"id":"e0ae3ada.3b0f48","type":"function","z":"2f0108b5.890318","name":"Generate History INSERT SQL","fun…

---

## [Raspberry Pi 4 boots from USB (beta)](https://discourse.nodered.org/t/raspberry-pi-4-boots-from-usb-beta/27015)

<div class="topic-metadata">

**Author:** [@drmibell](https://discourse.nodered.org/u/drmibell)\
**Replies:** 5\
**Last updated:** [21 May 2020 07:55 UTC](https://discourse.nodered.org/t/raspberry-pi-4-boots-from-usb-beta/27015 "2020-05-21T07:55:02Z")

</div>

Only slightly NR-related but discussed here before: some of you may have seen this https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=274595 or this A Pi 4 can now run entirely without an SD card.…

---

## [Raspberry pi arduino connection speed problem](https://discourse.nodered.org/t/raspberry-pi-arduino-connection-speed-problem/26817)

<div class="topic-metadata">

**Author:** [@feconkar](https://discourse.nodered.org/u/feconkar)\
**Replies:** 4\
**Last updated:** [20 May 2020 09:04 UTC](https://discourse.nodered.org/t/raspberry-pi-arduino-connection-speed-problem/26817 "2020-05-20T09:04:57Z")

</div>

hi I am trying to read a potentiometer data over firmata with node-red. potentiometer connects to analog pin of arduino and arduino is connect to raspberry pi over usb. Program runs good and i can get the data from ard…

[Previous page](https://discourse.nodered.org/c/hardware/16.md?page=11)

[Next page](https://discourse.nodered.org/c/hardware/16.md?page=13)