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156 lines
2.4 KiB
C++
156 lines
2.4 KiB
C++
//
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// FILE: rain.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.4
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// DATE: 2021-12-03
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// PURPOSE: Arduino library for a rain sensor
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// URL: https://github.com/RobTillaart/RAIN
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// https://www.tinytronics.nl/shop/nl/sensoren/vloeistof/regensensor
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#include "rain.h"
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RAIN::RAIN(uint8_t analogPort, uint8_t powerPin)
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{
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_analogPort = analogPort;
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_powerPin = powerPin;
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_maxVoltage = 5;
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_maxSteps = 1023;
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_dryRefVoltage = _maxVoltage;
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}
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bool RAIN::begin(float maxVoltage, uint16_t maxSteps)
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{
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_maxVoltage = maxVoltage;
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_maxSteps = maxSteps;
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_mVstep = _maxVoltage / _maxSteps;
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_dryRefVoltage = _maxVoltage;
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if (_powerPin != 255)
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{
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pinMode(_powerPin, OUTPUT);
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powerOn();
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}
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read();
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return true;
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}
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float RAIN::raw(uint8_t times)
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{
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if (times == 0) times = 1;
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float sum = 0;
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powerOn();
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for (int i = 0; i < times; i++)
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{
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sum += analogRead(_analogPort);
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}
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powerOff();
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if (times > 1) sum /= times;
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return sum;
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}
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float RAIN::read(uint8_t times)
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{
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_previous = _voltage;
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_voltage = raw(times) * _mVstep;
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return _voltage;
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}
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//////////////////////////////////////////////////////////////////
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//
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// ANALYSIS
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//
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void RAIN::setDryReference(float dryRef)
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{
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_dryRefVoltage = dryRef;
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}
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float RAIN::getDryReference()
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{
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return _dryRefVoltage;
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}
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float RAIN::percentage()
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{
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float perc = 100.0 - (_voltage * 100.0 / _dryRefVoltage);
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if (perc < 0) perc = 0;
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return perc;
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}
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float RAIN::delta()
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{
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return _voltage - _previous;
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}
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//////////////////////////////////////////////////////////////////
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//
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// LEVEL
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//
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bool RAIN::setLevel(uint8_t nr, uint16_t milliVolts)
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{
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if (nr == 0) return false;
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if (nr > 4) return false;
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_level[nr] = milliVolts;
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return true;
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}
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uint8_t RAIN::getLevel()
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{
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uint16_t value = _voltage * 1000;
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for (int index = 4; index > 0; index--)
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{
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if (value >= _level[index]) return index;
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}
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return 0;
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}
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//////////////////////////////////////////////////////////////////
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//
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// POWER
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//
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void RAIN::powerOn()
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{
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if (_powerPin != 255)
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{
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digitalWrite(_powerPin, HIGH);
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delayMicroseconds(_powerDelay); // time to stabilize, adjust if needed.
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}
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}
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void RAIN::powerOff()
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{
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if (_powerPin != 255)
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{
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digitalWrite(_powerPin, LOW);
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}
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}
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void RAIN::setPowerDelay(uint8_t powerDelay)
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{
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_powerDelay = powerDelay;
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}
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uint8_t RAIN::getPowerDelay()
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{
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return _powerDelay;
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}
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// -- END OF FILE --
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