Fork of the espurna firmware for `mhsw` switches
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// -----------------------------------------------------------------------------
// GUVA-S12SD UV Sensor
// Copyright (C) 2017-2018 by Xose Pérez <xose dot perez at gmail dot com>
// by Mustafa Tufan
// -----------------------------------------------------------------------------
#if SENSOR_SUPPORT && GUVAS12SD_SUPPORT
#pragma once
#include "Arduino.h"
#include "BaseSensor.h"
// http://www.eoc-inc.com/genicom/GUVA-S12SD.pdf
//
// GUVA-S12D has a wide spectral range of 200nm-400nm
// The output voltage and the UV index is linear, illumination intensity = 307 * Vsig where: Vsig is the value of voltage measured from the SIG pin of the interface, unit V.
// illumination intensity unit: mW/m2 for the combination strength of UV light with wavelength range: 200nm-400nm
// UV Index = illumination intensity / 200
//
// UV Index | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 10+
// -----------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+------+--------
// mV | <50 | 227 | 318 | 408 | 503 | 606 | 696 | 795 | 881 | 976 | 1079 | 1170+
// analog val | <10 | 46 | 65 | 83 | 103 | 124 | 142 | 162 | 180 | 200 | 221 | 240+
//
#define UV_SAMPLE_RATE 1
class GUVAS12SDSensor : public BaseSensor {
public:
// ---------------------------------------------------------------------
// Public
// ---------------------------------------------------------------------
GUVAS12SDSensor(): BaseSensor() {
_count = 1;
_sensor_id = SENSOR_GUVAS12SD_ID;
}
~GUVAS12SDSensor() {
if (_previous != GPIO_NONE) gpioReleaseLock(_previous);
}
// ---------------------------------------------------------------------
void setGPIO(unsigned char gpio) {
_gpio = gpio;
}
// ---------------------------------------------------------------------
unsigned char getGPIO() {
return _gpio;
}
// ---------------------------------------------------------------------
// Sensor API
// ---------------------------------------------------------------------
// Initialization method, must be idempotent
void begin() {
// Manage GPIO lock
if (_previous != GPIO_NONE) gpioReleaseLock(_previous);
_previous = GPIO_NONE;
if (!gpioGetLock(_gpio)) {
_error = SENSOR_ERROR_GPIO_USED;
return;
}
_previous = _gpio;
_ready = true;
}
// Pre-read hook (usually to populate registers with up-to-date data)
void pre() {
_error = SENSOR_ERROR_OK;
_read();
}
// Descriptive name of the sensor
String description() {
char buffer[18];
snprintf(buffer, sizeof(buffer), "GUVAS12SD @ GPIO%d", _gpio);
return String(buffer);
}
// Descriptive name of the slot # index
String slot(unsigned char index) {
return description();
};
// Address of the sensor (it could be the GPIO or I2C address)
String address(unsigned char index) {
return String(_gpio);
}
// Type for slot # index
unsigned char type(unsigned char index) {
if (index == 0) return MAGNITUDE_UV;
return MAGNITUDE_NONE;
}
// Current value for slot # index
double value(unsigned char index) {
if (index == 0) return _uvindex;
return 0;
}
protected:
// ---------------------------------------------------------------------
// Protected
// ---------------------------------------------------------------------
void _read() {
int _average = 0;
#if UV_SAMPLE_RATE == 1
_average = analogRead(0);
#else
for (unsigned int i=0; i < UV_SAMPLE_RATE; i++) {
_average += analogRead(0);
delay(2);
}
_average = (_average / UV_SAMPLE_RATE);
#endif
// _sensormV = _average / 1023*3.3;
if (_average < 10) {
_uvindex = 0;
} else if (_average < 46) {
_uvindex = (_average - 10) / (46-10);
} else if (_average < 65) {
_uvindex = 1 + ((_average - 46) / (65-46));
} else if (_average < 83) {
_uvindex = 2 + ((_average - 65) / (83-65));
} else if (_average < 103) {
_uvindex = 3 + ((_average - 83) / (103- 83));
} else if (_average < 124) {
_uvindex = 4 + ((_average - 103) / (124-103));
} else if (_average < 142) {
_uvindex = 5 + ((_average - 124) / (142-124));
} else if (_average < 162) {
_uvindex = 6 + ((_average - 142) / (162-142));
} else if (_average < 180) {
_uvindex = 7 + ((_average - 162) / (180-162));
} else if (_average < 200) {
_uvindex = 8 + ((_average - 180) / (200-180));
} else if (_average < 221) {
_uvindex = 9 + ((_average - 200) / (221-200));
} else {
_uvindex = 10;
}
return _uvindex;
}
unsigned char _gpio = GPIO_NONE;
unsigned char _previous = GPIO_NONE;
double _uvindex = 0;
};
#endif // SENSOR_SUPPORT && GUVAS12SD_SUPPORT