ScratMan/HASmartThermostat 2026.11.1 on GitHub

🚀 New Features

Derivative Low-Pass EMA Filter: Added a First-Order Low-Pass Exponential Moving Average (EMA) filter (derivative_filter) to smooth out sensor noise and quantization steps on the derivative term ($D$), preventing output spikes on high-frequency sensors (closes #67, #180).
- Configurable via YAML and Config Flow UI (duration selector).
- Includes new service smart_thermostat.set_derivative_filter for dynamic adjustment.
Improved Hysteresis Mode (#328): Refactored PID and hysteresis logic so that setting pid_mode: off completely bypasses PID calculations and outdoor compensation ($K_e$), enforcing pure hysteresis bounds (hot_tolerance / cold_tolerance).

Startup Watchdog Fix (#220): Fixed sensor_stall watchdog so it correctly triggers safety mode (output_safety) even if the temperature sensor is unavailable or unknown right from Home Assistant startup.
Startup Stability (#343): Ignore control loops and output calculations until Home Assistant has fully started to prevent unwanted trigger spikes or invalid initial states on boot. (@jandado in #343)
Cycle Duration Enforcement (#337): Enforce min_cycle_duration on refreshes and at startup to strictly respect minimum cycle times (closes #316). (@jandado in #337)
Actuator Command Fallback (#342): Fall back to generic homeassistant services for ON/OFF commands when domain-specific services are unavailable. (@jandado in #342)

Updated localization files (fr.json, it.json, de.json) with new UI option strings and data descriptions.
Added detailed documentation and sensor tuning guidelines for derivative_filter in README.md.

Full Changelog: 2026.11.0...2026.11.1