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Cleanup fan control #89

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sb10q merged 1 commits from atse/thermostat:fan-pwm-cleanup into master 2024-08-17 17:37:18 +08:00
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README.md
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@ -277,12 +277,11 @@ The thermostat implements a PID control loop for each of the TEC channels, more
## Fan control ## Fan control
Fan control is available for the thermostat revisions with integrated fan system. For this purpose four commands are available: Fan control commands are available for thermostat revisions with an integrated fan system:
1. `fan` - show fan stats: `fan_pwm`, `abs_max_tec_i`, `auto_mode`, `k_a`, `k_b`, `k_c`. 1. `fan` - show fan stats: `fan_pwm`, `abs_max_tec_i`, `auto_mode`, `k_a`, `k_b`, `k_c`.
2. `fan auto` - enable auto speed controller mode, which correlates with fan curve `fcurve`. 2. `fan auto` - enable auto speed controller mode, where fan speed is controlled by the fan curve `fcurve`.
3. `fan <value>` - set the fan power with the value from `1` to `100` and disable auto mode. There is no way to disable the fan. 3. `fan <value>` - set the fan power with the value from `1` to `100` and disable auto mode. There is no way to completely disable the fan.
Please note that power doesn't correlate with the actual speed linearly. Please note that power doesn't correlate with the actual speed linearly.
4. `fcurve <a> <b> <c>` - set coefficients of the controlling curve `a*x^2 + b*x + c`, where `x` is `abs_max_tec_i/MAX_TEC_I`, 4. `fcurve <a> <b> <c>` - set coefficients of the controlling curve `a*x^2 + b*x + c`, where `x` is `abs_max_tec_i/MAX_TEC_I`, a normalized value in range [0,1],
i.e. receives values from 0 to 1 linearly tied to the maximum current. The controlling curve should produce values from 0 to 1, i.e. the (linear) proportion of current output capacity used, on the channel with the largest current flow. The controlling curve is also clamped to [0,1].
as below and beyond values would be substituted by 0 and 1 respectively. 5. `fcurve default` - restore fan curve coefficients to defaults: `a = 1.0, b = 0.0, c = 0.0`.
5. `fcurve default` - restore fan curve settings to defaults: `a = 1.0, b = 0.0, c = 0.0`.