GY-63_MS5611/libraries/AnalogUVSensor/AnalogUVSensor.cpp
2024-04-06 11:27:13 +02:00

99 lines
1.8 KiB
C++

//
// FILE: AnalogUVSensor.h
// AUTHOR: Rob Tillaart
// VERSION: 0.1.6
// DATE: 2021-09-25
// PURPOSE: Arduino library for an analogue UV sensor.
// URL: https://github.com/RobTillaart/AnalogUVSensor
#include "AnalogUVSensor.h"
AnalogUVSensor::AnalogUVSensor()
{
// defaults from UNO.
_analogPin = 14; // A0 for UNO
_volts = 5;
_maxADC = 1023;
_powerPin = -1;
_invert = false;
}
void AnalogUVSensor::begin(uint8_t analogPin, float volts, uint16_t maxADC)
{
_analogPin = analogPin;
_volts = volts;
_maxADC = maxADC;
}
float AnalogUVSensor::read(uint8_t times)
{
uint32_t sum = 0;
if (times == 0) times = 1;
for (int i = 0; i < times; i++)
{
sum += analogRead(_analogPin);
}
uint16_t milliVolt = sum * (_volts * 1000.0) / (times * _maxADC);
return mV2index(milliVolt);
}
float AnalogUVSensor::mV2index(uint16_t milliVolt)
{
if (milliVolt < 50)
{
return 0.0;
}
// linear interpolation between 0..1
if (milliVolt < 227)
{
return 0.0 + (1.0 * milliVolt - 50.0) / (227.0 - 50.0);
}
// linear interpolation between 1..11
// formula derived with spreadsheet.
if (milliVolt < 1200)
{
return 0.0104865310 * milliVolt - 1.289154988;
}
return 12;
}
char AnalogUVSensor::index2color(float index)
{
if (index <= 2) return 'G';
if (index <= 5) return 'Y';
if (index <= 7) return 'O';
if (index <= 10) return 'R';
return 'P';
}
void AnalogUVSensor::setPowerPin(uint8_t powerPin, bool invert)
{
_invert = invert;
_powerPin = powerPin;
pinMode(_powerPin, OUTPUT);
switchOn();
}
void AnalogUVSensor::switchOff()
{
digitalWrite(_powerPin, _invert ? HIGH : LOW);
}
void AnalogUVSensor::switchOn()
{
digitalWrite(_powerPin, _invert ? LOW : HIGH);
}
// -- END OF FILE --