Centrala
Quick Integration Guide: HomeMaster OpenTherm Gateway & Viessmann Vitodens 100-W The HomeMaster OpenTherm Gateway is a DIN-rail mountable ESP32 device pre-flashed with ESPHome. It acts as a translator between Home Assistant (via Wi-Fi) and your boiler's OpenTherm digital bus. 1. Physical Installation & Wiring ⚠️ Safety Warning: Always isolate the mains power supply to the boiler before opening the casing. +──────────────────────────┐ +──────────────────────────┐ │ HomeMaster Gateway │ │ Viessmann Vitodens 100-W│ │ │ 2-core │ │ │ [ OT1 ] [ OT2 ] ─────┼─────────────┼─────> [ OT ] Terminals │ │ (Polarity Independent) │ │ (On main control board) │ └──────────────────────────┘ └──────────────────────────┘ Mounting: Clip the HomeMaster Gateway onto your DIN rail or secure it in an electrical enclosure near the boiler. Wiring to Boiler: Run a standard 2-co...