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fan-control: estimate + expose fan power (fan_watts_est)

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The iDRAC reports only total DCMI watts + RPM (no per-fan power), so add a
cube-law fan-power estimate: fan_W ~= 0.0205*(RPM/1000)^3, calibrated to the
2026-06-05 sweep (fits within ~3W; ~2W floor -> ~99W full). The daemon reads
live RPM each loop and pushes pve_fan_control_fan_rpm + _fan_watts_est.
Surfaced in HA as sensor.r730_fan_power_est + a "Fan Power (est)" card on the
dashboard-it Server view, next to total power. 46 bash tests green; verified
live (9120rpm -> ~15W est).

[ci skip]

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Viktor Barzin 2026-06-05 11:10:27 +00:00
parent 324f2dc3bf
commit 51456a96f6
4 changed files with 41 additions and 7 deletions
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7
scripts/test-fan-control.sh
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@ -52,6 +52,13 @@ eq "resolve quiet=quiet curve" 73 "$(fc_resolve quiet 78 0 cool -1 3)"
eq "resolve auto+empty=cool" 51 "$(fc_resolve auto 60 0 cool -1 3)"
eq "resolve auto+present=quiet" 31 "$(fc_resolve auto 70 0 quiet -1 3)"
# --- fc_fan_watts: estimated fan power from RPM (cube-law, calibrated to the sweep) ---
eq "fan_watts 0" 0 "$(fc_fan_watts 0)"
eq "fan_watts 4800" 2 "$(fc_fan_watts 4800)"
eq "fan_watts 9360" 16 "$(fc_fan_watts 9360)"
eq "fan_watts 12720" 42 "$(fc_fan_watts 12720)"
eq "fan_watts 16920" 99 "$(fc_fan_watts 16920)"
# --- presence ---
now=1000000
eq "presence open -> quiet" quiet "$(fc_presence_mode Отворена 0 $now 900 Отворена)"