I'm trying to figure out if I can create flows in Node Red to be deployed to Arduino Mega which has 16 relays connected.. Then have a remote Wemos D1 Mini send commands to the Mega to invoke individual flows when needed. I'm making the assumption that Node Red allows you to make multiple flows tha…

Welcome to the forum @abehil Do you mean you want to run node-red on the Arduino? I do not believe that is possible.

You need a more general computer rather than a microprocessor board for running Node-RED since Node-RED uses node.js which needs an operating system. However, you might not even need node-red for what you are trying to do. Just get the client to talk direct to the Mega. Most of us recognise howeve…

NOpe - as the others have said NR will not run on the Mega. What you can do (which i previously did - but have just finished retiring) is put a very basic sketch on the mega - it just listens to MQTT messages and turns relays on and off based on these messages. The Nextion/Wemos talks through MQTT…

[image] abehil: Server: Arduino Mega driving 16 relay board to control The server needs to be microprocessor based, as opposed to microcontroller based (like the Arduino). So make the server into a Raspberry Pi (not the Pico which is also a MCU). The client can be the Arduino with the relay…

I use an 8 channel relay board from NCD.io which I control via a node in Node-Red. It's very easy. NCD.io makes 16, 24 and 32 channel relay boards too. I connect the NCD.io board to the Raspberry Pi over i2c. NCD.io has an i2c capable node for NodeRED. Keeping it all in NodeRED allows me to cre…

Thanks to all, especially craigcurtin, for your advice. Craig, can you point me to some sample code or tutorial showing how to set up to do what you descibed? Some code bits showing how the Mega listens for or sends MQTT messages as I have no experience with MQTT protocols would probably be enough…

Obviously for the Mega to send/receive MQTT it needs to be Network aware - so you either need an Ethernet adapter (easiest and best) for it - or a wifi module - i assume you have one of these ? Do you already have a Mega - if not then an alternate option would be [image] <a href="https://www.aliexpress.com/item/1005002231689053.html?_randl_currency=AUD&_randl_shipto=AU&src=google&memo1=freelisting&src=google&albch=shopping&acnt=708-803-3821&slnk=&plac=&mtctp=&albbt=Google_7_shopping&albagn=888888&isSmbAutoCall=false&needSmbHouyi=false&albcp=11492545420&albag=112296941236&trgt=1284054470089&crea=en1005002231689053&netw=u&device=c&albpg=1284054470089&albpd=en1005002231689053&gclid=Cj0KCQjw5-WRBhCKARIsAAId9FlQoRRTDOT5UBm7RwETbO6SNGkXaN_3J6KlmRW9B3UVXpIHUnaIiOwaAq1IEALw_wcB&gclsrc=aw.ds&aff_fcid=7162cb9becaf44229087adf1235b2763-1648004435894-04301-UneMJZVf&aff_fsk=UneMJZVf&aff_platform=aaf&sk=UneMJZVf&aff_trace_key=7162cb9becaf44229087adf1235b2763-1648004435894-04301-UneMJZVf&terminal_id=feb74254137f45b88e8e67fe470d7c10&afSmartRedirect=y" target="_blank" rel="noopener nofollow ugc">12.3AU $ 4% OFF|E…

Sanity Check for my Node Red project architecture

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xx_Nexus_xx 21 March 2022 05:18 6

Easiest and most performat way is to run TASMOTA or an Arduino base MQTT on the wemos D1 ... and than send the command from NR server.

NR-Server will not run on wemos D1.

I have a NR server running on old laptop (2ghz, 8gb ram,ssd, Ubuntu with docker) ... and have around 12 independent wemos D1 around the house .. all operating via MQTT

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Sanity Check for my Node Red project architecture

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