Multiple fan wall project advice

[coroee]

Hello all!

We are working on an art project which consists of 8 walls of server brushless fans that are separated from each other.  in each wall there are 30 12v 0.2a fans, and 18 24v 0.5 fans. 

We would like to create different cycling programs in each wall that are triggered by a message from a main controller (esp32 / RPi) 
The walls are separated from each other so we thought that going wireless should be the cleanest way to build it.

We thought to use a Kincony A6 for each wall, that reads the message through esp-now or controlled by esphome or KCS firmware (can it control several boards?). 

I'm a pretty technical guy but making first steps into home automation.. so.. 

1. Does this setup make sense or is there a more elegant solution? 
2. I have some arduino coding knowledge but tempted by the GUI offered through the other solutions - which one of them provides just what I need, including manual on/off triggering of all connected boards + program scheduling?
3. Will the relays bear 6 amps 24v each for several seconds, going on and off for half an hour year (5 days a week, 10 hours per day), or should I opt for SSRs?

Many thanks and a lovely week to come! 

Roee.

[admin]

1. every KC868-A6 board work independently.
2. if you want use one dashboard to manager multi relay boards, chose home assistant software will be better.
3. about 6A 24v work with KC868-A6'relay directly, it's ok.

[tanoshimi]

I've settled on the KC868-A6 as the best "general purpose" ESP32-based Kincony controller that offers the right mix of features/cost. The only things which for me it lacks compared to the A4 is the ethernet/buzzer. But, it makes up for it with the RS485/I2C interfaces instead, so it really depends on what you want to use.

I'd probably use one KC868-A6 per wall of fans. You mentioned a central "server" control - for me personally, I would always prefer to use Node-RED for that role, and MQTT as the message transport system, but that's much more reliable over wired ethernet... you could use regular Wi-Fi or ESPNow instead. Or you could always add a W5500 port via the SPI interface (advertised as being for LoRa, but you can really attach anything to it, even though the pin headers are a little shorter than standard)