34 lines
715 B
C
34 lines
715 B
C
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#ifndef SensorDHT_h
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#define SensorDHT_h
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#include <Arduino.h>
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#include "HalInterfaces.h"
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// Define types of sensors.
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#define DHT11 11
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#define DHT22 22
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#define DHT21 21
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class SensorDHT : public SensorTemperature
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{
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public:
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SensorDHT(uint8_t type, uint8_t pin) : _type(type), _pin(pin) {};
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virtual void setup();
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virtual void read(TemperatureData& data);
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private:
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uint8_t _type, _pin;
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uint32_t _maxcycles;
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#ifdef __AVR
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// Use direct GPIO access on an 8-bit AVR so keep track of the port and bitmask
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// for the digital pin connected to the DHT. Other platforms will use digitalRead.
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uint8_t _bit, _port;
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#endif
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uint32_t expectPulse(bool level);
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};
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#endif
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