Support external-sensor setpoint compensation for direct mini-split control

[wwmcmanus]

I use RoomMind with direct control for my mini-split air conditioners and proportional control for my TRVs. This works well for heating/TRVs, but I am seeing a problem with direct control for cooling.

The issue is that RoomMind uses an external room temperature sensor as the control/comfort sensor, but the mini-split itself makes cooling decisions based on its own internal temperature sensor. These two readings can differ significantly.

For example, in my living room right now:

RoomMind target temperature: 23.0°C
RoomMind room sensor temperature: 24.6°C
Mini-split internal temperature reading: 23.0°C
Mini-split setpoint: 23.0°C

From RoomMind’s perspective, the room is 1.6°C above the target and should still be cooling. However, the mini-split believes the room is already at the target temperature, so it remains idle and does not cool the actual room temperature down to the RoomMind target.

I think direct control is still the right general strategy for mini-split A/Cs, but RoomMind may need an additional option for external-sensor-based cooling control. Ideally, RoomMind could compensate for the difference between the external room sensor and the mini-split’s internal sensor.

Possible implementation:

When using direct control with a mini-split or climate entity, allow RoomMind to apply a cooling setpoint offset or setpoint bias based on the external room sensor. For example, if the external room sensor is above the RoomMind target but the temperature failes to decrease (because the mini-split is not actively cooling because its internal sensor reads the target as satisfied), RoomMind could temporarily lower the setpoint sent to the mini-split until the external sensor reaches the RoomMind target.

In short, the feature request is for RoomMind to support external-room-sensor-driven setpoint compensation when using direct control with mini-split A/Cs, so that the external sensor remains the source of truth for room comfort rather than the mini-split’s internal sensor.