Sonoff Zigbee dongle P

… definitely enough for that scale if you have a strong mesh. the 50 mains-powered routers are the key here. i have a setup with about 180 devices on a single sonoff-p dongle and it's rock solid because i spent time making sure the routers (mostly switches and plugs) are well-distributed. splitting into multiple networks usually adds more complexity and interference issues than it solves. just make sure you're using a good usb extension cable to keep the dongle away from the server's interference.

Excerpt saved from the Arctic Shift Reddit archive on 2026-10-23.