Home Assistant + Node-RED as a BMS-style supervisory layer above Evohome, ESPHome and an OpenTherm node: three-layer architecture with local fall-back, tiered command authority (temporary, rate-limited, read-back-confirmed, audit-logged writes), heartbeat and kill switch. Hosts optimum start/stop first.
node-red home-assistant evohome building-automation fail-safe hvac-control ramses supervisory-control bms-portfolio head-end command-authority
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Updated
Oct 28, 2026