The RPi 5 firmware stops the fan entirely when cool, so a 0 RPM
reading is normal and must not be hidden. On multi-fan machines,
prefer a CPU-labeled hwmon group over faster case fans.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The RPi 5 fan connector exposes a tachometer via the pwmfan hwmon
device. Report it as fan_rpm in cpu_stats and show it in both the
Controller fallback UI and the React Status page. Hidden when no fan
is present.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
