WipperSnapper_I2C_Driver_AS7331.h

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#ifndef WipperSnapper_I2C_Driver_AS7331_H
#define WipperSnapper_I2C_Driver_AS7331_H

#include "WipperSnapper_I2C_Driver.h"
#include <Adafruit_AS7331.h>

#define AS7331_BREAKTIME_200US 25 

/**************************************************************************/
/**************************************************************************/
class WipperSnapper_I2C_Driver_AS7331 : public WipperSnapper_I2C_Driver {
public:
  /*******************************************************************************/
  /*******************************************************************************/
  WipperSnapper_I2C_Driver_AS7331(TwoWire *i2c, uint16_t sensorAddress)
      : WipperSnapper_I2C_Driver(i2c, sensorAddress) {
    _i2c = i2c;
    _sensorAddress = sensorAddress;
  }

  /*******************************************************************************/
  /*******************************************************************************/
  ~WipperSnapper_I2C_Driver_AS7331() { delete _as7331; }

  /*******************************************************************************/
  /*******************************************************************************/
  bool begin() {
    if (_as7331)
      delete _as7331;
    _as7331 = new Adafruit_AS7331();
    if (!_as7331->begin(_i2c, (uint8_t)_sensorAddress))
      return false;

    bool setupSuccess = true;
    // Configure sensor — must power down before changing settings
    setupSuccess &= _as7331->powerDown(true);
    if (!setupSuccess)
      return false;
    // Explicitly set defaults to pin behavior against library changes
    setupSuccess &= _as7331->setGain(AS7331_GAIN_4X);
    setupSuccess &= _as7331->setIntegrationTime(AS7331_TIME_64MS);
    setupSuccess &= _as7331->setMeasurementMode(AS7331_MODE_CONT);
    setupSuccess &= _as7331->setClockFrequency(AS7331_CLOCK_1024MHZ);
    setupSuccess &= _as7331->setBreakTime(AS7331_BREAKTIME_200US);
    setupSuccess &= _as7331->setStandby(false);

    // Start continuous measurements
    setupSuccess &= _as7331->powerDown(false);

    return setupSuccess;
  }

  /*******************************************************************************/
  /*******************************************************************************/
  bool getEventRaw(sensors_event_t *rawEvent) {
    if (!_readSensor())
      return false;

    rawEvent->data[0] = _cachedUVB;
    return true;
  }

protected:
  Adafruit_AS7331 *_as7331 = nullptr; 
  unsigned long _lastRead = 0;        
  float _cachedUVB = 0;               

  /*******************************************************************************/
  /*******************************************************************************/
  bool _readSensor() {
    unsigned long now = millis();
    if (_lastRead != 0 && (now - _lastRead < ONE_SECOND_IN_MILLIS))
      return true;

    float uva, uvb, uvc;
    if (!_as7331->readAllUV_uWcm2(&uva, &uvb, &uvc))
      return false;

    _cachedUVB = uvb;
    _lastRead = now;

    WS_DEBUG_PRINT("AS7331 UVA: ");
    WS_DEBUG_PRINTVAR(uva);
    WS_DEBUG_PRINT(" UVB: ");
    WS_DEBUG_PRINTVAR(uvb);
    WS_DEBUG_PRINT(" UVC: ");
    WS_DEBUG_PRINTLNVAR(uvc);

    return true;
  }
};

#endif // WipperSnapper_I2C_Driver_AS7331_H