ACS712XX.h

/*
 * FILE NAME: ACS712XX.h
 * AUTHOR   : Rafi
 * VERSION  : 1.0
 * DATE     : 01-June-2021
 * PURPOSE  : Measure current easier, using this ACS712 current sensor library.
 * SOURCE   : https://www.allegromicro.com/en/products/sense/current-sensor-ics/zero-to-fifty-amp-integrated-conductor-sensor-ics/acs712
 */

#ifndef ACS712XX_h
#define ACS712XX_h

#include <Arduino.h>

#define ACS712_05B_SENSITIVITY    185     // mV/A
#define ACS712_20A_SENSITIVITY    100     // mV/A
#define ACS712_30A_SENSITIVITY    66      // mV/A

enum ACS712XXType{
  ACS712_05B = 0,
  ACS712_20A = 1,
  ACS712_30A = 2,
  ACS712XX_N = 3
};

class ACS712XX{
  public:
    ACS712XX(ACS712XXType _type, uint8_t _pin, uint8_t _adc_ref = 5 ,int _adc_fs = 1023);
    float autoCalibrate();
    float getAC(float _freq = 50.0,float _n_total_period = 1.0);
    float getDC(int _count = 10);
    float getOffset()                 { return offset;                  }
    float getSensitivity()            { return 1000.0/inv_sensitivity;  }
    void setOffset(float _offset)     { offset = _offset;               }
    void setSensitivity(float _sen);
    void reset();

  private:
    uint8_t sensor_sen[ACS712XX_N] = {ACS712_05B_SENSITIVITY,
                                      ACS712_20A_SENSITIVITY,
                                      ACS712_30A_SENSITIVITY};
    float inv_sensitivity;
    float results_adjuster;
    float offset;
    int adc_fs;
    uint8_t ACS712XX_pin;
    ACS712XXType type;
};

#endif    /*ACS712XX_h*/