[Lerc]

I was thinking SPI access from a mcu would be the way to go. While the individual data rate would be fairly low, running a lot of them at the same time would probably add up.

If they just need the slots to plug everything in and leave overnight you could probably just run off some PCBs with heaps of card slots per mcu and let it cycle through them one after another

[K0balt]

With WiFi mcus below a dollar, no need to double up even.

[Lerc]

I dunno, Have you ever operated 1000 WiFi devices in the one room?

[K0balt]

It’s all 2.4, so you you can cook in there just fine.

But seriously that probably would be around 50w of tx power lol.

You could probably sort it with 10 good APs

But yeah, it’s going to be an RF star for sure.