# Hardware

**URL:** https://discourse.nodered.org/c/hardware/16.md?page=2

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

**Page:** 3

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## [Which Shelly Devices report current AC Voltage over MQTT?](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405)

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**Author:** [@DocPrinter](https://discourse.nodered.org/u/DocPrinter)\
**Replies:** 8\
**Last updated:** [10 July 2024 23:56 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405 "2024-07-10T23:56:02Z")

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Afternoon All, Looking to make a return to my home automation projects, with a soft start looking at monitoring current AC Voltage. I was looking at either " Shelly 1 Mini Gen3" or " Shelly PM Mini Gen3". Regardless of…

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## [How to give command for printer to print directly from Node-Red nodes?](https://discourse.nodered.org/t/how-to-give-command-for-printer-to-print-directly-from-node-red-nodes/89297)

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**Author:** [@plcguys](https://discourse.nodered.org/u/plcguys)\
**Replies:** 3\
**Last updated:** [5 July 2024 12:23 UTC](https://discourse.nodered.org/t/how-to-give-command-for-printer-to-print-directly-from-node-red-nodes/89297 "2024-07-05T12:23:02Z")

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Hello, I having an issue on finding a suitable nodes to give command to the Printer. Im connecting my printer with PC via Ethernet. My printer brand is Sato, model number is CL4NX. Does anyone have ever tried to communic…

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## [Reading ATC\_MiThermometer in \*connected\* mode](https://discourse.nodered.org/t/reading-atc-mithermometer-in-connected-mode/89263)

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**Author:** [@LondisDunleer](https://discourse.nodered.org/u/LondisDunleer)\
**Replies:** 0\
**Last updated:** [4 July 2024 11:45 UTC](https://discourse.nodered.org/t/reading-atc-mithermometer-in-connected-mode/89263 "2024-07-04T11:45:28Z")

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Hi, Doubt anyone can help with this one, but thanks for looking. I use the ATC\_MiThermometers in advertising mode. I get the data in using a BLE scanning node which picks up all the advertising data being broadcast, wh…

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## [ESP32-C3-Super-Mini not connecting to WiFi channel \> 6](https://discourse.nodered.org/t/esp32-c3-super-mini-not-connecting-to-wifi-channel-6/88719)

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**Author:** [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Replies:** 2\
**Last updated:** [16 June 2024 15:34 UTC](https://discourse.nodered.org/t/esp32-c3-super-mini-not-connecting-to-wifi-channel-6/88719 "2024-06-16T15:34:42Z")

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Just found out by 2-hrs of frustration that the ESP32-C3-Super-Mini won't connect to any WiFi channels higher than channel 6. I'm using it to send T/H/P readings via MQTT to Node-RED. I suspect the reason is the physi…

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## [Beagle Bone Black Thermostat problems with the "read file" node](https://discourse.nodered.org/t/beagle-bone-black-thermostat-problems-with-the-read-file-node/88677)

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**Author:** [@willgoon12337](https://discourse.nodered.org/u/willgoon12337)\
**Replies:** 16\
**Last updated:** [13 June 2024 19:59 UTC](https://discourse.nodered.org/t/beagle-bone-black-thermostat-problems-with-the-read-file-node/88677 "2024-06-13T19:59:02Z")

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6/13/2024, 10:45:56 AMnode: Temperature Handlerfunction : (error) "TypeError: Cannot read properties of undefined (reading 'readFile')" \[ { "id": "2ffefe74a7d3908d", "type": "file in", "z": …

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## [Serial Port does not receive data on Rpi5](https://discourse.nodered.org/t/serial-port-does-not-receive-data-on-rpi5/87813)

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**Author:** [@gylim78](https://discourse.nodered.org/u/gylim78)\
**Replies:** 3\
**Last updated:** [12 June 2024 10:51 UTC](https://discourse.nodered.org/t/serial-port-does-not-receive-data-on-rpi5/87813 "2024-06-12T10:51:37Z")

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I have been using the serial port through a docker container using a RPI 3. I followed the instructions at Docker NR & ttyUSB0 Permission denied - #17 by janvda I use the node-red-node-serialport node to do this. Conn…

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## [Rpi5, RpiOS 12 (Bookworm), Node-RED v3.1.10, Node.js v18.20, i2c](https://discourse.nodered.org/t/rpi5-rpios-12-bookworm-node-red-v3-1-10-node-js-v18-20-i2c/88626)

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**Author:** [@SonoraTechnical](https://discourse.nodered.org/u/SonoraTechnical)\
**Replies:** 0\
**Last updated:** [11 June 2024 20:08 UTC](https://discourse.nodered.org/t/rpi5-rpios-12-bookworm-node-red-v3-1-10-node-js-v18-20-i2c/88626 "2024-06-11T20:08:24Z")

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Most threads reporting unsuccessful activity w/ Rpi5 have been closed. I think I have some positive news, so I'm starting this thread. I have an Rpi5 w/ 8GB of Ram. I did not win the silicon lottery, so I'm only able …

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## [Interesting Sonoff device iHost](https://discourse.nodered.org/t/interesting-sonoff-device-ihost/76341)

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**Author:** [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Replies:** 18\
**Last updated:** [23 May 2024 02:12 UTC](https://discourse.nodered.org/t/interesting-sonoff-device-ihost/76341 "2024-05-23T02:12:52Z")

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Sonoff introduced a new device "iHost" to manage "smart" devices - locally, it might appear as a hub, but it can do zigbee/matter (planned)/BT and it can also run docker containers, including node-red (they even advertis…

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## [Node Red on Pine 64](https://discourse.nodered.org/t/node-red-on-pine-64/19240)

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**Author:** [@DonFL](https://discourse.nodered.org/u/DonFL)\
**Replies:** 3\
**Last updated:** [15 May 2024 19:47 UTC](https://discourse.nodered.org/t/node-red-on-pine-64/19240 "2024-05-15T19:47:14Z")

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Wondering if anyone has spent any time with Node Red running on the Pine64. https://www.pine64.org/devices/single-board-computers/pine-a64/ There is a pretty devoted following, not to the level of the Pi or anything lik…

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## [Nice(?) and cheap ESP32+Colour display](https://discourse.nodered.org/t/nice-and-cheap-esp32-colour-display/82413)

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**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 117\
**Last updated:** [28 April 2024 18:05 UTC](https://discourse.nodered.org/t/nice-and-cheap-esp32-colour-display/82413 "2024-04-28T18:05:23Z")

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Looking for a project for Christmas? :slight\_smile: Just seen this video from Brian Lough about a low-cost ESP32 + Colour screen device from Ali Express. He is participating in a community effort to get some solid docum…

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## [Help with INA3221](https://discourse.nodered.org/t/help-with-ina3221/87297)

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**Author:** [@deanfourie1](https://discourse.nodered.org/u/deanfourie1)\
**Replies:** 1\
**Last updated:** [17 April 2024 10:47 UTC](https://discourse.nodered.org/t/help-with-ina3221/87297 "2024-04-17T10:47:48Z")

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Hi there, I am trying to read data from a INA3221 sensor and send to Homeassistant via MQTT. What are my options here as I only see drivers for the INA219 etc but cant see anything for the INA3221. I did however find …

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## [Raspberry Pi 5 Fan or Not?](https://discourse.nodered.org/t/raspberry-pi-5-fan-or-not/87235)

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**Author:** [@acestu](https://discourse.nodered.org/u/acestu)\
**Replies:** 6\
**Last updated:** [14 April 2024 16:20 UTC](https://discourse.nodered.org/t/raspberry-pi-5-fan-or-not/87235 "2024-04-14T16:20:07Z")

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Hi, I am just waiting for my raspberry pi 5 and so I have printed a case for it, now this case does have vents but no fan mount, should this be ok for node red running 20 sensor inputs to gauges, doing some research peo…

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## [DFROBOT GP8302 Javascript function with I2Coutput node](https://discourse.nodered.org/t/dfrobot-gp8302-javascript-function-with-i2coutput-node/87232)

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**Author:** [@Francois](https://discourse.nodered.org/u/Francois)\
**Replies:** 0\
**Last updated:** [14 April 2024 12:07 UTC](https://discourse.nodered.org/t/dfrobot-gp8302-javascript-function-with-i2coutput-node/87232 "2024-04-14T12:07:37Z")

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Hi there. If you need to drive a GP8302 (Digital to analog current converter), here is the code i wrote with the help of chagpt after few hours of tries. in a javascript function in the dashboard with I2C nodes. ========…

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## [Pi Pico W won't auto run main.py or boot.py](https://discourse.nodered.org/t/pi-pico-w-wont-auto-run-main-py-or-boot-py/86952)

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**Author:** [@badflash](https://discourse.nodered.org/u/badflash)\
**Replies:** 30\
**Last updated:** [11 April 2024 00:11 UTC](https://discourse.nodered.org/t/pi-pico-w-wont-auto-run-main-py-or-boot-py/86952 "2024-04-11T00:11:12Z")

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There seems to be a weird interaction between using the network library and the I2C on my Pico W's. I am trying to set up any sort of display using I2C and connecting to the internet. The program runs fine when run via T…

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## [Shape Shifting USB Device : IODD-ST400-USB-3.0](https://discourse.nodered.org/t/shape-shifting-usb-device-iodd-st400-usb-3-0/87130)

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**Author:** [@marcus-j-davies](https://discourse.nodered.org/u/marcus-j-davies)\
**Replies:** 0\
**Last updated:** [10 April 2024 17:57 UTC](https://discourse.nodered.org/t/shape-shifting-usb-device-iodd-st400-usb-3-0/87130 "2024-04-10T17:57:19Z")

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Not really a smart home thing, but I find this gadget amazing, and is like a Swiss army knife for those that need to always flash USB sticks, or convert ISO files to bootable USB Media I spotted it on a YouTube Video (t…

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## [Mosfet relay behaving not as expected (Shelly Uni)](https://discourse.nodered.org/t/mosfet-relay-behaving-not-as-expected-shelly-uni/87023)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 16\
**Last updated:** [6 April 2024 14:31 UTC](https://discourse.nodered.org/t/mosfet-relay-behaving-not-as-expected-shelly-uni/87023 "2024-04-06T14:31:22Z")

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Hi folks, I managed some time ago to control opening/closing my garage door via Node-RED, by installing a Shelly Switch plus 1 (relay) in parallel with the existing physical wall-mounted switch: The "control" pin is…

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## [Connecting node-red on rpi5 with hAss to LOGO8 PLC doesn't work](https://discourse.nodered.org/t/connecting-node-red-on-rpi5-with-hass-to-logo8-plc-doesnt-work/86984)

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**Author:** [@DonKaio](https://discourse.nodered.org/u/DonKaio)\
**Replies:** 0\
**Last updated:** [3 April 2024 19:52 UTC](https://discourse.nodered.org/t/connecting-node-red-on-rpi5-with-hass-to-logo8-plc-doesnt-work/86984 "2024-04-03T19:52:16Z")

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Hi, so I build the electrics in my home with 5 Logo8 PLCs, which work fine so far. Now I want to connect home assistant on a raspberry pi 5 to those PLCs via Node-Red. I followed a few tutorials for this connection, but…

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## [MCP4725 and I2C node-red-contrib-i2c](https://discourse.nodered.org/t/mcp4725-and-i2c-node-red-contrib-i2c/86314)

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**Author:** [@Francois](https://discourse.nodered.org/u/Francois)\
**Replies:** 12\
**Last updated:** [2 April 2024 05:39 UTC](https://discourse.nodered.org/t/mcp4725-and-i2c-node-red-contrib-i2c/86314 "2024-04-02T05:39:38Z")

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Hi all, i just discovered node-red 3 weeks ago and i developed a dashboard to send query to a modbus server with success so i am happy. Now i need to interact with a MCP4725 to send variable voltage to control a device.…

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## [Pi Pico W and BME280](https://discourse.nodered.org/t/pi-pico-w-and-bme280/86883)

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**Author:** [@badflash](https://discourse.nodered.org/u/badflash)\
**Replies:** 9\
**Last updated:** [1 April 2024 13:57 UTC](https://discourse.nodered.org/t/pi-pico-w-and-bme280/86883 "2024-04-01T13:57:47Z")

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I could not get my Pico W to play nicely with my BME280. It just could not read it with the standard micropython drivers. I had some other drivers from Core Electronic and they worked really well. Quite robust and just k…

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## [Reading Wireless mBus](https://discourse.nodered.org/t/reading-wireless-mbus/86772)

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**Author:** [@meuh4](https://discourse.nodered.org/u/meuh4)\
**Replies:** 0\
**Last updated:** [26 March 2024 13:57 UTC](https://discourse.nodered.org/t/reading-wireless-mbus/86772 "2024-03-26T13:57:59Z")

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Hello, first of all, thank you to all those who take the time to keep this forum running, I've already had a lot of answers while researching it. For a project to read a wireless mBus device 868 MHz, I'm looking for a …

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## [Raspberry Pi 5 Support Coming?](https://discourse.nodered.org/t/raspberry-pi-5-support-coming/86546)

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**Author:** [@moose](https://discourse.nodered.org/u/moose)\
**Replies:** 20\
**Last updated:** [24 March 2024 16:58 UTC](https://discourse.nodered.org/t/raspberry-pi-5-support-coming/86546 "2024-03-24T16:58:44Z")

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I am going to be using a Hubitat C8 to manage some automation for an external building, and from reading their forums, many people recommend Node-RED as the backbone to their system for continuity and easily setting up w…

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## [Pico W Incubator](https://discourse.nodered.org/t/pico-w-incubator/86669)

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**Author:** [@badflash](https://discourse.nodered.org/u/badflash)\
**Replies:** 13\
**Last updated:** [23 March 2024 16:39 UTC](https://discourse.nodered.org/t/pico-w-incubator/86669 "2024-03-23T16:39:41Z")

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OK, I'm updating this post. I've built a egg incubator from a junk incubator with a bad temperature controller using a Pi Pico W and Node-Red. The hardware is A Pi Pico W with a couple of soldered terminal blocks, a DS1…

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## [Raspi 5 and mp3 files](https://discourse.nodered.org/t/raspi-5-and-mp3-files/86482)

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**Author:** [@richiep](https://discourse.nodered.org/u/richiep)\
**Replies:** 11\
**Last updated:** [22 March 2024 21:44 UTC](https://discourse.nodered.org/t/raspi-5-and-mp3-files/86482 "2024-03-22T21:44:22Z")

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Hey All, I just upgraded to a Raspberry Pi 5, Buster to Bookworm, and Node-Red 3.0.2 to 3.1.7. I use sounds when motion sensors are triggered and timed events. In the past I used the exec node that called a bash file…

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## [How to receive MQTT data using Subscribe and callback](https://discourse.nodered.org/t/how-to-receive-mqtt-data-using-subscribe-and-callback/86596)

<div class="topic-metadata">

**Author:** [@badflash](https://discourse.nodered.org/u/badflash)\
**Replies:** 21\
**Last updated:** [22 March 2024 13:48 UTC](https://discourse.nodered.org/t/how-to-receive-mqtt-data-using-subscribe-and-callback/86596 "2024-03-22T13:48:48Z")

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I am have trouble figuring out how to implement the subscribe and callback feature of MQTT in micropython. The examples I've found aren't helping me figure out how to do it. I'm a new guy. I am using a Pi Pico W, HiveMQ…

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## [How to read non-voltage-free switches via Shelly](https://discourse.nodered.org/t/how-to-read-non-voltage-free-switches-via-shelly/86264)

<div class="topic-metadata">

**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 12\
**Last updated:** [11 March 2024 23:18 UTC](https://discourse.nodered.org/t/how-to-read-non-voltage-free-switches-via-shelly/86264 "2024-03-11T23:18:12Z")

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Hi folks, In the past my (primitive) home automation has been growing organically with all kind of technologies I learned from people in this community. As a result it became a huge mess, which would unmaintainable for…

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## [Urgent electronic problem (drive pump with 2 switches)](https://discourse.nodered.org/t/urgent-electronic-problem-drive-pump-with-2-switches/84221)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 58\
**Last updated:** [8 March 2024 22:14 UTC](https://discourse.nodered.org/t/urgent-electronic-problem-drive-pump-with-2-switches/84221 "2024-03-08T22:14:16Z")

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Hi folks, Not really Node-RED related, but need some help... Lots of water daily in the basement of my mother in law, due to the heavy rainfall. Father in law died recently and his self-made pump mechanism does not wo…

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## [Controlling 2 PCF8574 boards](https://discourse.nodered.org/t/controlling-2-pcf8574-boards/85920)

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**Author:** [@GammaKappa](https://discourse.nodered.org/u/GammaKappa)\
**Replies:** 10\
**Last updated:** [26 February 2024 19:44 UTC](https://discourse.nodered.org/t/controlling-2-pcf8574-boards/85920 "2024-02-26T19:44:34Z")

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I am trying to control two PCf8574 boards (8 port IO expanders) in Node-red using the @joe-ab1do/mcp-pcf-aio node. This works fine with 1 board, but not with 2 boards. I connected the 2 PCF8574 boards to the Raspberry …

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## [Writing to a Flash Drive located on a Raspi](https://discourse.nodered.org/t/writing-to-a-flash-drive-located-on-a-raspi/85681)

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**Author:** [@hotdog](https://discourse.nodered.org/u/hotdog)\
**Replies:** 5\
**Last updated:** [21 February 2024 01:20 UTC](https://discourse.nodered.org/t/writing-to-a-flash-drive-located-on-a-raspi/85681 "2024-02-21T01:20:02Z")

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I am trying to find a way to write to a usb device without specifying a local root directory. I found some information about using /dev/ttyUSB and /dev/pts/0, but when I attempt to implement that into my flow I am given …

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## [Seeed’s Openwrt IO’s not working with Node-red](https://discourse.nodered.org/t/seeed-s-openwrt-io-s-not-working-with-node-red/85700)

<div class="topic-metadata">

**Author:** [@cloud](https://discourse.nodered.org/u/cloud)\
**Replies:** 9\
**Last updated:** [20 February 2024 14:50 UTC](https://discourse.nodered.org/t/seeed-s-openwrt-io-s-not-working-with-node-red/85700 "2024-02-20T14:50:29Z")

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We just installed seed’s openwrt img “openwrt-bcm27xx-bcm2711-rpi-4-squashfs-sysupgrade.img.gz” ( OpenWrt 22.03.3, r20028-43d71ad93e) on Raspberry 4b - 4Gb. When we tried to use gpio and serial pins we got this error. …

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## [Smart TRV's (again)](https://discourse.nodered.org/t/smart-trvs-again/85505)

<div class="topic-metadata">

**Author:** [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Replies:** 4\
**Last updated:** [14 February 2024 18:34 UTC](https://discourse.nodered.org/t/smart-trvs-again/85505 "2024-02-14T18:34:47Z")

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I know we have been over this ground several times... but... has anyone in UK got / used any of these smart TRVs - from Sandy Beach retailing in UK ? Seem like a good price - and use a zigbee gateway (Tuya ?) and of c…

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