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Using FastPrecisePow instead of pow

This commit is contained in:
rice103 2022-01-23 18:27:32 +01:00
parent 496de57c07
commit 06617c7fcb
1 changed files with 2 additions and 2 deletions
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4
tasmota/xsns_02_analog.ino
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@ -383,12 +383,12 @@ float AdcGetMq(uint32_t idx) {
_adc = AdcRead(Adc[idx].pin, 2);
avg += _adc;
}
float voltage = (avg/ retries) * ANALOG_V33 / ((pow(2, ANALOG_RESOLUTION)) - 1);
float voltage = (avg/ retries) * ANALOG_V33 / ((FastPrecisePow(2, ANALOG_RESOLUTION)) - 1);
float _RS_Calc = ((ANALOG_V33 * _RL) / voltage) -_RL; //Get value of RS in a gas
if (_RS_Calc < 0) _RS_Calc = 0; //No negative values accepted.
float _ratio = _RS_Calc / _R0; // Get ratio RS_gas/RS_air
float ppm= Adc[idx].param2/ANALOG_MQ_DECIMAL_MULTIPLIER*pow(_ratio, Adc[idx].param3/ANALOG_MQ_DECIMAL_MULTIPLIER); // <- Source excel analisis https://github.com/miguel5612/MQSensorsLib_Docs/tree/master/Internal_design_documents
float ppm= Adc[idx].param2/ANALOG_MQ_DECIMAL_MULTIPLIER*FastPrecisePow(_ratio, Adc[idx].param3/ANALOG_MQ_DECIMAL_MULTIPLIER); // <- Source excel analisis https://github.com/miguel5612/MQSensorsLib_Docs/tree/master/Internal_design_documents
if(ppm < 0) ppm = 0; //No negative values accepted or upper datasheet recomendation.
char ppm_chr[6];
dtostrfd(ppm, 2, ppm_chr);