Hello friends. I am currently running my NR-program to read and control my pump. For this i talk to the pump via MODBUS (nodes) and send data (and recieve) to (from) my MQTT server that is running on a vm. Right now i am using a Rasi 4. Since Rapys became quiet expensive, i look for alternatives. …

[image] Manuel_o: I am currently running my NR-program to read and control my pump. Unless that is a complex task then I would have thought that would be easily performed pi a Pi Zero.

Switch myself now to an Odroid-c4 with 32Gb emcc module. Nodered, Grafana, Influx, mosquitto it runs all smooth on this Odriod. Hardware preformance is comparable to the specs of an pi4. eMMC module is much faster then an SD card so the overall performance is faster. If you order one don't forget…

For your use case, although I am not sure of Modbus compatible yet, you should check out this thread [ https://discourse.nodered.org/t/node-red-mcu-plugin-v1-0-integrating-node-red-mcu-edition-into-the-node-red-editor ]( https://MCU plugin) With this you can run node-red on an ESP32

thank you for the tip. from what i see this module has not WLAN. or am i missing something.

Hi @Manuel_o [image] jmorris644: With this you can run node-red on an ESP32 Looking at your use case, I can only underline the proposal of @jmorris644 ... as it is exactly the use case that triggered the creation of the node-red-mcu-plugin . I replaced the RasPi with an ESP32 & node-red-mcu …

i will look into i and thought the whole weekend about it. "problem" right now that i have (i am not quiet sure it it is doable) and need LAN and WLAN for my project at the same time. There is a ESP32 out there that has POE. (olimex POE ISO). The problem (that i solved) with my raspi was, that my …

We spent some time recently to help @BartButenaers run node-red-mcu on his WT32-ETH01 board. As @phoddie indicated , there's the possibility to run both interfaces of such a board; there might be some additional work to do - but the way to go seems to be not too far ... as Peter had it already worki…

Just to confirm what @BartButenaers and @ralphwetzel note, the ESP32 running Node-RED MCU Edition is technically capable of doing this. There's just a little bit of setup and configuration work that needs to be done to make that easy to use. I'm happy to do that, if someone (you!?) are going to use …

This additional work, it that for the MODBUS connectivity?

Node-RED

Node-RED Forum

How to find the perfect hardware

Hardware

BartButenaers 11 April 2023 08:49 9

Yes you could use a wt32-eth01, as described here.

Topic		Replies	Views
Send data using WLAN from Serial control node (ttyUSB0) from Raspberry Pi Zero W to a Raspberry Pi 4B General	25	220	5 June 2026
Single Sensor Node (ESP32-S2-Mini or RPi Pico-W) Share Your Projects	38	1200	5 July 2025
Tutorial - Read a sensor by running a Node-RED flow on an ESP32 via node-red-mcu Share Your Projects node-red-mcu	11	2602	20 December 2023
Olimex PIC-WEB Board Hardware	6	123	24 March 2025
Node-Red Sensors Hardware	34	6221	19 April 2020

Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

How to find the perfect hardware

Related topics