Move master branch from from mios git repo

2014-01-23 00:23:15 +01:00
commit 609d9e5be9
352 changed files with 53418 additions and 0 deletions
@@ -0,0 +1,96 @@
+/******************************************************************
+  DHT Temperature & Humidity Sensor library for Arduino.
+
+  Features:
+  - Support for DHT11 and DHT22/AM2302/RHT03
+  - Auto detect sensor model
+  - Very low memory footprint
+  - Very small code
+
+  http://www.github.com/markruys/arduino-DHT
+
+  Written by Mark Ruys, mark@paracas.nl.
+
+  BSD license, check license.txt for more information.
+  All text above must be included in any redistribution.
+
+  Datasheets:
+  - http://www.micro4you.com/files/sensor/DHT11.pdf
+  - http://www.adafruit.com/datasheets/DHT22.pdf
+  - http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Weather/RHT03.pdf
+  - http://meteobox.tk/files/AM2302.pdf
+
+  Changelog:
+   2013-06-10: Initial version
+   2013-06-12: Refactored code
+   2013-07-01: Add a resetTimer method
+ ******************************************************************/
+
+#ifndef dht_h
+#define dht_h
+
+#if ARDUINO < 100
+  #include <WProgram.h>
+#else
+  #include <Arduino.h>
+#endif
+
+class DHT
+{
+public:
+
+  typedef enum {
+    AUTO_DETECT,
+    DHT11,
+    DHT22,
+    AM2302,  // Packaged DHT22
+    RHT03    // Equivalent to DHT22
+  }
+  DHT_MODEL_t;
+
+  typedef enum {
+    ERROR_NONE = 0,
+    ERROR_TIMEOUT,
+    ERROR_CHECKSUM
+  }
+  DHT_ERROR_t;
+
+  void setup(uint8_t pin, DHT_MODEL_t model=AUTO_DETECT);
+  void resetTimer();
+
+  float getTemperature();
+  float getHumidity();
+
+  DHT_ERROR_t getStatus() { return error; };
+  const char* getStatusString();
+
+  DHT_MODEL_t getModel() { return model; }
+
+  int getMinimumSamplingPeriod() { return model == DHT11 ? 1000 : 2000; }
+
+  int8_t getNumberOfDecimalsTemperature() { return model == DHT11 ? 0 : 1; };
+  int8_t getLowerBoundTemperature() { return model == DHT11 ? 0 : -40; };
+  int8_t getUpperBoundTemperature() { return model == DHT11 ? 50 : 125; };
+
+  int8_t getNumberOfDecimalsHumidity() { return 0; };
+  int8_t getLowerBoundHumidity() { return model == DHT11 ? 20 : 0; };
+  int8_t getUpperBoundHumidity() { return model == DHT11 ? 90 : 100; };
+
+  static float toFahrenheit(float fromCelcius) { return 1.8 * fromCelcius + 32.0; };
+  static float toCelsius(float fromFahrenheit) { return (fromFahrenheit - 32.0) / 1.8; };
+
+protected:
+  void readSensor();
+
+  float temperature;
+  float humidity;
+
+  uint8_t pin;
+
+private:
+  DHT_MODEL_t model;
+  DHT_ERROR_t error;
+  unsigned long lastReadTime;
+};
+
+#endif /*dht_h*/