Sensoreinheit für Lux und UV-Index mit ESP8266

// Calibration constants:
// Four gain calibration constants -- alpha, beta, gamma, delta -- can be used to correct the output in
// reference to a GOLDEN sample. The golden sample should be calibrated under a solar simulator.
// Setting these to 1.0 essentialy eliminates the "golden"-sample calibration
const float CALIBRATION_ALPHA_VIS = 1.0; // UVA / UVAgolden
const float CALIBRATION_BETA_VIS = 1.0;  // UVB / UVBgolden
const float CALIBRATION_GAMMA_IR = 1.0;  // UVcomp1 / UVcomp1golden
const float CALIBRATION_DELTA_IR = 1.0;  // UVcomp2 / UVcomp2golden

// Responsivity:
// Responsivity converts a raw 16-bit UVA/UVB reading to a relative irradiance (W/m^2).
// These values will need to be adjusted as either integration time or dynamic settings are modififed.
// These values are recommended by the "Designing the VEML6075 into an application" app note for 100ms IT
const float UVA_RESPONSIVITY = 0.00110; // UVAresponsivity
const float UVB_RESPONSIVITY = 0.00125; // UVBresponsivity

// UV coefficients:
// These coefficients
// These values are recommended by the "Designing the VEML6075 into an application" app note
const float UVA_VIS_COEF_A = 2.22; // a
const float UVA_IR_COEF_B = 1.33;  // b
const float UVB_VIS_COEF_C = 2.95; // c
const float UVB_IR_COEF_D = 1.75;  // d

uint16_t rawA, rawB, visibleComp, irComp;
  float uviaCalc, uvibCalc, uvia, uvib, uvi;

  // Read raw and compensation data from the sensor
  rawA = uv.rawUva();
  rawB = uv.rawUvb();
  visibleComp = uv.visibleCompensation();
  irComp = uv.irCompensation();

  // Calculate the simple UVIA and UVIB. These are used to calculate the UVI signal.
  uviaCalc = (float)rawA - ((UVA_VIS_COEF_A * CALIBRATION_ALPHA_VIS * visibleComp) / CALIBRATION_GAMMA_IR) - ((UVA_IR_COEF_B * CALIBRATION_ALPHA_VIS * irComp) / CALIBRATION_DELTA_IR);
  uvibCalc = (float)rawB - ((UVB_VIS_COEF_C * CALIBRATION_BETA_VIS * visibleComp) / CALIBRATION_GAMMA_IR) - ((UVB_IR_COEF_D * CALIBRATION_BETA_VIS * irComp) / CALIBRATION_DELTA_IR);

  // Convert raw UVIA and UVIB to values scaled by the sensor responsivity
  uvia = uviaCalc * (1.0 / CALIBRATION_ALPHA_VIS) * UVA_RESPONSIVITY;
  uvib = uvibCalc * (1.0 / CALIBRATION_BETA_VIS) * UVB_RESPONSIVITY;

  // Use UVIA and UVIB to calculate the average UVI:
  uvi = (uvia + uvib) / 2.0;

// Calibration constants:
// Four gain calibration constants -- alpha, beta, gamma, delta -- can be used to correct the output in
// reference to a GOLDEN sample. The golden sample should be calibrated under a solar simulator.
// Setting these to 1.0 essentialy eliminates the "golden"-sample calibration
const float CALIBRATION_ALPHA_VIS = 1.0; // UVA / UVAgolden
const float CALIBRATION_BETA_VIS = 1.0;  // UVB / UVBgolden
const float CALIBRATION_GAMMA_IR = 1.0;  // UVcomp1 / UVcomp1golden
const float CALIBRATION_DELTA_IR = 1.0;  // UVcomp2 / UVcomp2golden

// Responsivity:
// Responsivity converts a raw 16-bit UVA/UVB reading to a relative irradiance (W/m^2).
// These values will need to be adjusted as either integration time or dynamic settings are modififed.
// These values are recommended by the "Designing the VEML6075 into an application" app note for 100ms IT
const float UVA_RESPONSIVITY_K1 = 0.001461; // UVAresponsivity
const float UVB_RESPONSIVITY_K2 = 0.002591; // UVBresponsivity

// UV coefficients:
// These coefficients
// These values are recommended by the "Designing the VEML6075 into an application" app note
const float UVA_VIS_COEF_A = 2.22; // a
const float UVA_IR_COEF_B = 1.33;  // b
const float UVB_VIS_COEF_C = 2.95; // c
const float UVB_IR_COEF_D = 1.74;  // d

uint16_t rawA, rawB, visibleComp, irComp;
  float UVAcalc, UVBcalc, UVIA, UVIB, UVI;

  // Read raw and compensation data from the sensor
  rawA = uv.rawUva();
  rawB = uv.rawUvb();
  visibleComp = uv.visibleCompensation();
  irComp = uv.irCompensation();

  // Calculate the simple UVIA and UVIB. These are used to calculate the UVI signal.
  UVAcalc = rawA - UVA_VIS_COEF_A * visibleComp - UVA_IR_COEF_B * irComp;
  UVBcalc = rawB - UVB_VIS_COEF_C * visibleComp - UVB_IR_COEF_D * irComp;

  // Convert raw UVIA and UVIB to values scaled by the sensor responsivity
  UVIA = UVAcalc * UVA_RESPONSIVITY_K1; 
  UVIB = UVBcalc * UVB_RESPONSIVITY_K2;

  // Use UVIA and UVIB to calculate the average UVI:
  UVI = (UVIA + UVIB) / 2.0;