Blocks internet access per-device on a schedule using OpenWRT nftables rules, with a Home Assistant dashboard toggle for manual overrides — no third-party apps or cloud dependency.

Home network segmented into VLANs — IoT devices, trusted clients, and guest traffic isolated on separate subnets with OpenWRT firewall rules between them.

Two ESPHome configs for a SONOFF S31 smart plug that auto power-cycles a device when it stops responding — one using ICMP ping loss detection, one using Home Assistant API connection loss.