# Hardware

**URL:** https://discourse.nodered.org/c/hardware/16.md?page=15

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

**Page:** 16

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## [Update-nodejs-and-nodered on Raspbian Buster](https://discourse.nodered.org/t/update-nodejs-and-nodered-on-raspbian-buster/12566)

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**Author:** [@utaani](https://discourse.nodered.org/u/utaani)\
**Replies:** 19\
**Last updated:** [4 September 2019 14:24 UTC](https://discourse.nodered.org/t/update-nodejs-and-nodered-on-raspbian-buster/12566 "2019-09-04T14:24:31Z")

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After clean install with raspbian 2019-06-20, I try to upgrade with script, then it failed with 'Failed to install Node.js'. After that, I found new script on /usr/bin/update-nodejs-and-nodered , already installed. …

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## [PIVPN is now maintained again](https://discourse.nodered.org/t/pivpn-is-now-maintained-again/9747)

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**Author:** [@ghayne](https://discourse.nodered.org/u/ghayne)\
**Replies:** 27\
**Last updated:** [4 September 2019 08:46 UTC](https://discourse.nodered.org/t/pivpn-is-now-maintained-again/9747 "2019-09-04T08:46:58Z")

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Title says it all really. http://www.pivpn.io/

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## [Node-red-contrib-modbustcp](https://discourse.nodered.org/t/node-red-contrib-modbustcp/10315)

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**Author:** [@RickW](https://discourse.nodered.org/u/RickW)\
**Replies:** 4\
**Last updated:** [2 September 2019 02:59 UTC](https://discourse.nodered.org/t/node-red-contrib-modbustcp/10315 "2019-09-02T02:59:27Z")

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When I "Deploy" my Node-RED flow the modbustcp-read nodes don't reconnect. They show "Initiating...." and then after about 2 minutes they show "Disconnected" but they never reconnect. I am using a King Pigeon M230T 4 A…

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## [Relays for dummies](https://discourse.nodered.org/t/relays-for-dummies/13714)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 65\
**Last updated:** [28 August 2019 08:32 UTC](https://discourse.nodered.org/t/relays-for-dummies/13714 "2019-08-28T08:32:37Z")

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Hi folks, My wife reminded me yesterday that I bought - more than a year ago - a series of relay devices, a.o. to control the garage doors via Node-RED. And this time she is right: I should finish that project in the n…

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## [DIY: Raspberry Pi UPS/Automatic safe power ON/OFF](https://discourse.nodered.org/t/diy-raspberry-pi-ups-automatic-safe-power-on-off/9045)

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**Author:** [@markost](https://discourse.nodered.org/u/markost)\
**Replies:** 10\
**Last updated:** [20 July 2019 22:09 UTC](https://discourse.nodered.org/t/diy-raspberry-pi-ups-automatic-safe-power-on-off/9045 "2019-07-20T22:09:55Z")

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Finally, everything is in the box;) The goal was to set up the power supply for the Raspberry Pi, supported by the battery, with automatic power up and safe shutdown depending on the status of the AC power/battery char…

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## [NetGear router problem while trying to connect with System](https://discourse.nodered.org/t/netgear-router-problem-while-trying-to-connect-with-system/14121)

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**Author:** [@aronwarner11](https://discourse.nodered.org/u/aronwarner11)\
**Replies:** 2\
**Last updated:** [8 August 2019 06:10 UTC](https://discourse.nodered.org/t/netgear-router-problem-while-trying-to-connect-with-system/14121 "2019-08-08T06:10:13Z")

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I am using a NetGear for 2 years. And the Operating System is Windows 7. But nowadays Whenever I am trying to connect with the Router the bandwidth error occurs and the error code is 0x1991 and I don't even know how to S…

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## [Run NR in Docker Container or Virtual Machine?](https://discourse.nodered.org/t/run-nr-in-docker-container-or-virtual-machine/13771)

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**Author:** [@nodecentral](https://discourse.nodered.org/u/nodecentral)\
**Replies:** 28\
**Last updated:** [30 July 2019 12:37 UTC](https://discourse.nodered.org/t/run-nr-in-docker-container-or-virtual-machine/13771 "2019-07-30T12:37:28Z")

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Ok, this maybe we’ll trodden ground, but for a while now, I’ve always tried to run the things I need on my NAS, mainly via a container (e.g docker) But.... a recent flow/dashboard design challenge made me question my Do…

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## [Check if bluetooth device is connected or not](https://discourse.nodered.org/t/check-if-bluetooth-device-is-connected-or-not/13790)

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**Author:** [@HasseneKh](https://discourse.nodered.org/u/HasseneKh)\
**Replies:** 4\
**Last updated:** [29 July 2019 11:39 UTC](https://discourse.nodered.org/t/check-if-bluetooth-device-is-connected-or-not/13790 "2019-07-29T11:39:36Z")

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hi , i'm working in project to collect data from sensors with bluetooth (data : json) , and i want to get status of bluetooth device is connected or not , i have data gathered from sensors or not .. the data json still t…

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## [Node red & tradfri](https://discourse.nodered.org/t/node-red-tradfri/13558)

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**Author:** [@Benny](https://discourse.nodered.org/u/Benny)\
**Replies:** 5\
**Last updated:** [23 July 2019 14:37 UTC](https://discourse.nodered.org/t/node-red-tradfri/13558 "2019-07-23T14:37:15Z")

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Dear when i try to install the tradfri "libary" for node-red(running node-red at the newst version and running itr on a pi 4) I get the folowing errors: make: Leaving directory '/home/pi/node\_modules/node-aead-crypto/b…

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## [Globalcache iTach IP2SL](https://discourse.nodered.org/t/globalcache-itach-ip2sl/13456)

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**Author:** [@dvargas87](https://discourse.nodered.org/u/dvargas87)\
**Replies:** 0\
**Last updated:** [18 July 2019 18:34 UTC](https://discourse.nodered.org/t/globalcache-itach-ip2sl/13456 "2019-07-18T18:34:07Z")

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Hi everyone, I am attempting to send a string message to a globalcache IP2SL device in which I get the devices attached to the unit. I am using the node-red-contrib-globalcache pallete a {"serial":"getdevices,1:1,2"} m…

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## [NodeRed docker install package for ARM based cpu's](https://discourse.nodered.org/t/nodered-docker-install-package-for-arm-based-cpus/13147)

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**Author:** [@crisflashin](https://discourse.nodered.org/u/crisflashin)\
**Replies:** 0\
**Last updated:** [11 July 2019 05:47 UTC](https://discourse.nodered.org/t/nodered-docker-install-package-for-arm-based-cpus/13147 "2019-07-11T05:47:46Z")

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Hi guys! hope you are doing good ! I'm trying to install node red in my docker container that has ARM 32bit based cpu, but didnt find that based version. Do someone has some advice for me? Thank you so much, really app…

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## [Modbustcp and Node red under docker](https://discourse.nodered.org/t/modbustcp-and-node-red-under-docker/12925)

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**Author:** [@alexsahka](https://discourse.nodered.org/u/alexsahka)\
**Replies:** 0\
**Last updated:** [4 July 2019 18:39 UTC](https://discourse.nodered.org/t/modbustcp-and-node-red-under-docker/12925 "2019-07-04T18:39:45Z")

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Moved my node red from Ubuntu server to Docker with macvlan network driver (Node red has own IP address) same network, but Node red under Docker can't "talk" with Modbustcp device, running fine under Ubuntu. All network…

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## [Slightly OT: Major leak of Orvibo user data](https://discourse.nodered.org/t/slightly-ot-major-leak-of-orvibo-user-data/12830)

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**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 1\
**Last updated:** [2 July 2019 16:31 UTC](https://discourse.nodered.org/t/slightly-ot-major-leak-of-orvibo-user-data/12830 "2019-07-02T16:31:28Z")

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Hi all, slightly off topic but since it is quite possible people have some of these devices. Change passwords straight away ...

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## [Wireless connection not getting established](https://discourse.nodered.org/t/wireless-connection-not-getting-established/12108)

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**Author:** [@rjrajbir](https://discourse.nodered.org/u/rjrajbir)\
**Replies:** 0\
**Last updated:** [12 June 2019 11:00 UTC](https://discourse.nodered.org/t/wireless-connection-not-getting-established/12108 "2019-06-12T11:00:25Z")

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Hi,I am noob in node red,I have made all the connections but ncd wireless gateway showing "connecting"....but data is not showing in the dashboard. Error in the command prompt: 12 Jun 15:45:11 - \[info\] Stopping flows …

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## [Using Google Home Mini without internet connection?](https://discourse.nodered.org/t/using-google-home-mini-without-internet-connection/12048)

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**Author:** [@FrankP](https://discourse.nodered.org/u/FrankP)\
**Replies:** 4\
**Last updated:** [10 June 2019 20:32 UTC](https://discourse.nodered.org/t/using-google-home-mini-without-internet-connection/12048 "2019-06-10T20:32:47Z")

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Hi there, a Google Home Mini found its way in our smarthome, quite unexpected. Nice thing, lots of fun playing with it. When talking to my wife she has a strict opinion with the new big, little brother: no connection t…

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## [Acsip LORA modules are not recognisable in node red application](https://discourse.nodered.org/t/acsip-lora-modules-are-not-recognisable-in-node-red-application/6773)

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**Author:** [@muniraja.bs](https://discourse.nodered.org/u/muniraja.bs)\
**Replies:** 4\
**Last updated:** [21 May 2019 12:12 UTC](https://discourse.nodered.org/t/acsip-lora-modules-are-not-recognisable-in-node-red-application/6773 "2019-05-21T12:12:10Z")

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Hi We are using Nodeered lora application server to control the street light through the ACSIP modules . We observed that application server is unable to recognize Node (Acsip) and do respective function . We controlli…

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## [GPIO output fails "on"?](https://discourse.nodered.org/t/gpio-output-fails-on/11302)

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**Author:** [@rick](https://discourse.nodered.org/u/rick)\
**Replies:** 5\
**Last updated:** [20 May 2019 19:51 UTC](https://discourse.nodered.org/t/gpio-output-fails-on/11302 "2019-05-20T19:51:49Z")

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Hi all, New to node-red & raspberry pi and found something peculiar about the behavior of the GPIO outputs. They default to "on". if the flow is blocked (say by an rbe) on the first pass, the node indicates "OK" and t…

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## [ENABLE RS485 , changed my modbus from analog to digital](https://discourse.nodered.org/t/enable-rs485-changed-my-modbus-from-analog-to-digital/11291)

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**Author:** [@afiqkimii](https://discourse.nodered.org/u/afiqkimii)\
**Replies:** 3\
**Last updated:** [19 May 2019 19:15 UTC](https://discourse.nodered.org/t/enable-rs485-changed-my-modbus-from-analog-to-digital/11291 "2019-05-19T19:15:09Z")

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hi , i change my modbus rs485 from analog to digital(new one) can i know how to enable the rs485 port on my fanless cpu??

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## [NextionHMI / Raspberry Pi](https://discourse.nodered.org/t/nextionhmi-raspberry-pi/10976)

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**Author:** [@mhswa](https://discourse.nodered.org/u/mhswa)\
**Replies:** 4\
**Last updated:** [10 May 2019 16:12 UTC](https://discourse.nodered.org/t/nextionhmi-raspberry-pi/10976 "2019-05-10T16:12:07Z")

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Hello I have a Nexion HMI that i would like to control my PCA9685 Hat, I have Node-Red communicating with the servos and it works nicely, But now i need to control the Flow with a Nexion HMI via a usb UART connection. i…

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## [Updating variables on arduino 8266](https://discourse.nodered.org/t/updating-variables-on-arduino-8266/10870)

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**Author:** [@ArduinoBuddy8266](https://discourse.nodered.org/u/ArduinoBuddy8266)\
**Replies:** 3\
**Last updated:** [8 May 2019 09:32 UTC](https://discourse.nodered.org/t/updating-variables-on-arduino-8266/10870 "2019-05-08T09:32:52Z")

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Can I set an arduino esp8266 to power on/off a relay based on being above temp X. But have it so I can change the variable X from "the cloud" (aka some vps)? As an example, I want the microcontroller to turn fan on if o…

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## [How do I make node-red "talk" to the pre-existing hardware?](https://discourse.nodered.org/t/how-do-i-make-node-red-talk-to-the-pre-existing-hardware/10623)

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**Author:** [@manuel1](https://discourse.nodered.org/u/manuel1)\
**Replies:** 2\
**Last updated:** [28 April 2019 21:24 UTC](https://discourse.nodered.org/t/how-do-i-make-node-red-talk-to-the-pre-existing-hardware/10623 "2019-04-28T21:24:32Z")

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Hi everyone, . My question may sound quite basic to many of you, but my background is in manufacturing/operations and I am new to node-red. I want to develop an application for temperature monitoring and control for s…

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## [Node-red-contrib-modbustcp polling speed](https://discourse.nodered.org/t/node-red-contrib-modbustcp-polling-speed/10321)

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**Author:** [@RickW](https://discourse.nodered.org/u/RickW)\
**Replies:** 1\
**Last updated:** [18 April 2019 17:57 UTC](https://discourse.nodered.org/t/node-red-contrib-modbustcp-polling-speed/10321 "2019-04-18T17:57:42Z")

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What factors influence the speed of sampling of modbustcp-read nodes? I have a device with 4x 12 bit Analog inputs rated at 20Hz. I think that could mean it could sample every 50ms? I want to sample 5 times a second, …

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## [Ipx v3 node red](https://discourse.nodered.org/t/ipx-v3-node-red/9004)

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**Author:** [@acd](https://discourse.nodered.org/u/acd)\
**Replies:** 19\
**Last updated:** [20 March 2019 20:31 UTC](https://discourse.nodered.org/t/ipx-v3-node-red/9004 "2019-03-20T20:31:16Z")

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hello, beginner, I trying to read status of relax output from an IPX v3 Payload command : GetOut1 (for the first relax) Message payload : \* 14/3/2019 22:01:17\[node: 3b85a382.bbe724\](http://192.168.1.128:1880/#)msg :…

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## [PID controlling in general and a specific case](https://discourse.nodered.org/t/pid-controlling-in-general-and-a-specific-case/9169)

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**Author:** [@bohtho](https://discourse.nodered.org/u/bohtho)\
**Replies:** 12\
**Last updated:** [19 March 2019 13:41 UTC](https://discourse.nodered.org/t/pid-controlling-in-general-and-a-specific-case/9169 "2019-03-19T13:41:37Z")

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I hope this is the right category. This isnt entirely Node-RED specific but I cant think of any other forum with as many smart people. I'm new to PID control and would like to spar about a conondrum. I have particularl…

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## [General capacity of a RPi3](https://discourse.nodered.org/t/general-capacity-of-a-rpi3/8965)

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**Author:** [@bohtho](https://discourse.nodered.org/u/bohtho)\
**Replies:** 6\
**Last updated:** [14 March 2019 20:29 UTC](https://discourse.nodered.org/t/general-capacity-of-a-rpi3/8965 "2019-03-14T20:29:15Z")

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What is people’s general experience with running lots of background services on a RPi3? And when and why did you decide to distribute them across several Pis? I am currently running a 6 flow Node-RED with about 10 3rd …

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## [ESP-EYE, an ESP32-based board for AI](https://discourse.nodered.org/t/esp-eye-an-esp32-based-board-for-ai/7379)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 2\
**Last updated:** [6 March 2019 20:50 UTC](https://discourse.nodered.org/t/esp-eye-an-esp32-based-board-for-ai/7379 "2019-03-06T20:50:26Z")

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Hi folks, One of my fellow workers has shared today an interesting link about ESP-EYE, which is an ESP32 based board for AI: And here is their Github page. I have no time to play with this at the moment ( :woozy\_fac…

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## [Expert needed RasPi project I2C, GPIO issues](https://discourse.nodered.org/t/expert-needed-raspi-project-i2c-gpio-issues/5534)

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**Author:** [@GiovanniG](https://discourse.nodered.org/u/GiovanniG)\
**Replies:** 23\
**Last updated:** [20 February 2019 23:08 UTC](https://discourse.nodered.org/t/expert-needed-raspi-project-i2c-gpio-issues/5534 "2019-02-20T23:08:59Z")

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Hi dear friends, thank you for your kind attention and support. I'm involved into a project-domotic system, for this project I developer an hardware board connected to I2C bus and some buttons to GPIO, since now I tried…

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## [Trouble with tach - interrupt/GPIO](https://discourse.nodered.org/t/trouble-with-tach-interrupt-gpio/7792)

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**Author:** [@Quanta](https://discourse.nodered.org/u/Quanta)\
**Replies:** 0\
**Last updated:** [10 February 2019 05:27 UTC](https://discourse.nodered.org/t/trouble-with-tach-interrupt-gpio/7792 "2019-02-10T05:27:54Z")

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Greetings all. I am trying to do something useful while learning node red. Perhaps not ideal but necessary. I have node red loaded on an NanoPi NEO2 and have added node-red-contrib-opi-gpio in order to gain access to g…

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## [Switching hardware](https://discourse.nodered.org/t/switching-hardware/7621)

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**Author:** [@joyva](https://discourse.nodered.org/u/joyva)\
**Replies:** 5\
**Last updated:** [6 February 2019 17:01 UTC](https://discourse.nodered.org/t/switching-hardware/7621 "2019-02-06T17:01:18Z")

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Hi guys, I'm at the point where I'm going to install my home automation in my new home. I had planned to install an of the shelf system but now I'm convinced that node-red would be even better. The only problem I have i…

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## [Read Byte array of MPU6000 using I2C node in node red in Windows OS](https://discourse.nodered.org/t/read-byte-array-of-mpu6000-using-i2c-node-in-node-red-in-windows-os/7566)

<div class="topic-metadata">

**Author:** [@fredy76](https://discourse.nodered.org/u/fredy76)\
**Replies:** 2\
**Last updated:** [4 February 2019 10:48 UTC](https://discourse.nodered.org/t/read-byte-array-of-mpu6000-using-i2c-node-in-node-red-in-windows-os/7566 "2019-02-04T10:48:40Z")

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Hi, Is there the best way to read the byte array of MPU-6000 I2C modules? The sensor is connected to Arduino Uno via I2C cable but is there any possible way to use I2C node while running the node red in Windows Operatin…

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