is there a way to get one node red to send commands to another node-red device

Cross posted - https://node-red.slack.com/archives/C03M2TAQ8/p1527514230000511

hi I am sure it would if only I could get my head around it did try to load mqtt my server 2012 but it failed I only want to read a sensor from one drive and do something on another & I just don’t find this node-red stuff very easy to understand (not looking at doing anything cloud based either)

Well MQTT is, as far as I know, the easiest way to get data between parts of a node-red system. Start here https://www.hivemq.com/mqtt-essentials/ Once you have read that and understood the basics then if you can’t get it running you can ask here.

[image] gbond: I just don’t find this node-red stuff very easy to understand Some of it isn't and it is quite different to other methods (such as traditional programming languages) But if you think about it, how easy would it be to get get a program on one computer to send a message to anoth…

RabbitMQ is a good cross-platform, open-source, ‘local’ broker (supports many protocols as well as MQTT).

Well, it all depends on what you want to do exactly but if MQTT is too hard, why not use simple HTTP requests ? This method is “node-red-ready” as it does not require any additional software like a MQTT broker … Create a flow on NodeRed #1 including a “HTTP IN” node Create another flow NodeRed #2 …

[image] gbond: I am sure it would if only I could get my head around it did try to load mqtt my server 2012 but it failed I only want to read a sensor from one drive and do something on another & I just don’t find this node-red stuff very easy to understand (not looking at doing anything cloud…

ok want to keep it simple and in house I have a pi zero on ip address 192.168.7.80:1880 which reads a sensor etc (infred diodie) using node red I then have another pi zero also running node-red on ip-address 192.168.7.81:1880 which has a motor on it which again I can control I want a reliable w…

To install the broker on either of the PIs: sudo apt-get update && sudo apt-get install -y mosquitto You can install the clients on both with: sudo apt-get update && sudo apt-get install -y mosquitto-clients Assuming you installed the broker on 192.168.7.80… On 192.168.7.80, open a terminal and…

Node-RED

Node-RED Forum

One node-red device to ctl another node-red device

General

asandford 28 May 2018 15:47 3

I’d imagine MQTT would be the simplest if the flows are running on different machines

MQTT Broker disconnected

Topic		Replies	Views
Linking 2 or more instances on a local network General	9	4105	15 April 2020
Connect two node-reds General	10	2836	21 August 2020
Value to another Node Red General	18	447	30 June 2022
Interaction between devices using node-red General	16	1720	3 November 2019
Communication between two node-red applications General	8	226	11 March 2025

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.

One node-red device to ctl another node-red device

Related topics