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78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
#pragma once
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//
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// FILE: rain.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.2
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// DATE: 2022-11-23
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// PURPOSE: Arduino library for rain sensor (analog).
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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 "Arduino.h"
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#define RAIN_LIB_VERSION (F("0.1.2"))
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class RAIN
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{
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public:
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// port = analogPort,
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// powerPin is optional, 255 == not used => see readme.md
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RAIN(uint8_t port, uint8_t powerPin = 255);
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// set the ADC parameters
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// can be changed runtime, e.g if voltage fluctuates.
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bool begin(float maxVoltage, uint16_t maxSteps);
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// returns steps
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float raw(uint8_t times = 1);
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// returns voltage
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// the lower the voltage the wetter.
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float read(uint8_t times = 1);
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// ANALYSIS
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// read the sensor when it is dry to get a reference (calibration).
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// will be used by percentage(), can be used to setLevel().
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void setDryReference(float dryRef);
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float getDryReference();
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// returns last read value as percentage of DryReference (if set).
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// indicating wetness 0 == DRY 100 == WET
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// percentage assumes / implies "linear" behaviour
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float percentage();
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// delta with respect to previous read().
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float delta();
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// level = 1..4
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// level 0 == 0 Volt ==> WET)
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// level 4 ==> DRY
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// user is responsible that values are increasing voltages.
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bool setLevel(uint8_t nr, uint16_t milliVolts);
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uint8_t getLevel();
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// will only work when set in constructor.
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void powerOn();
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void powerOff();
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private:
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uint8_t _port;
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uint8_t _powerPin = 255; // 255 means not set.
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float _maxVoltage;
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uint16_t _maxSteps;
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float _mVstep;
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float _voltage;
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float _dryRefVoltage;
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float _previous;
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uint16_t _level[5] = { 0, 1000, 2000, 3000, 4000 }; // millivolts
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};
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// -- END OF FILE --
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