Basic ventilation mode: Home (0), Away (1), or Automatic (2) — the unit
dynamically adjusts fan speed itself rather than following a fixed
per-mode setting. Automatic was added in unit firmware 3.1.4; reverse-
engineered from a live unit's WebSocket traffic (STATE register write of
2), since neither the Modbus RTU manual nor the firmware changelog
document its register encoding.
Basic ventilation mode: Home (0), Away (1), or Automatic (2) — the unit dynamically adjusts fan speed itself rather than following a fixed per-mode setting. Automatic was added in unit firmware 3.1.4; reverse- engineered from a live unit's WebSocket traffic (STATE register write of 2), since neither the Modbus RTU manual nor the firmware changelog document its register encoding.