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Fix HM3301 AQI index calculator (#2739)
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2 changed files with 2 additions and 4 deletions
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@ -33,7 +33,7 @@ class AQICalculator : public AbstractAQICalculator {
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int conc_lo = array[grid_index][0];
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int conc_hi = array[grid_index][1];
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return ((aqi_hi - aqi_lo) / (conc_hi - conc_lo)) * (value - conc_lo) + aqi_lo;
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return (value - conc_lo) * (aqi_hi - aqi_lo) / (conc_hi - conc_lo) + aqi_lo;
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}
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int get_grid_index_(uint16_t value, int array[AMOUNT_OF_LEVELS][2]) {
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@ -37,9 +37,7 @@ class CAQICalculator : public AbstractAQICalculator {
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int conc_lo = array[grid_index][0];
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int conc_hi = array[grid_index][1];
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int aqi = ((aqi_hi - aqi_lo) / (conc_hi - conc_lo)) * (value - conc_lo) + aqi_lo;
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return aqi;
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return (value - conc_lo) * (aqi_hi - aqi_lo) / (conc_hi - conc_lo) + aqi_lo;
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}
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int get_grid_index_(uint16_t value, int array[AMOUNT_OF_LEVELS][2]) {
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