Diff: DHT.h
- Revision:
- 0:9b5b3200688f
- Child:
- 2:df22ddf10d75
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DHT.h Mon Jul 09 19:47:43 2012 +0000
@@ -0,0 +1,94 @@
+/*
+ * DHT Library for Digital-output Humidity and Temperature sensors
+ *
+ * Works with DHT11, DHT21, DHT22
+ * SEN11301P, Grove - Temperature&Humidity Sensor (Seeed Studio)
+ * SEN51035P, Grove - Temperature&Humidity Sensor Pro (Seeed Studio)
+ * AM2302 , temperature-humidity sensor
+ * RHT01,RHT02, RHT03 , Humidity and Temperature Sensor (Sparkfun)
+ *
+ * Copyright (C) Wim De Roeve
+ * based on DHT22 sensor library by HO WING KIT
+ * Arduino DHT11 library
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documnetation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MBED_DHT_H
+#define MBED_DHT_H
+
+#include "mbed.h"
+
+enum eType{
+ DHT11 = 11,
+ SEN11301P = 11,
+ RHT01 = 11,
+ DHT22 = 22,
+ AM2302 = 22,
+ SEN51035P = 22,
+ RHT02 = 22,
+ RHT03 = 22
+ } ;
+
+enum eError {
+ ERROR_NONE = 0,
+ BUS_BUSY =1,
+ ERROR_NOT_PRESENT =2 ,
+ ERROR_ACK_TOO_LONG =3 ,
+ ERROR_SYNC_TIMEOUT = 4,
+ ERROR_DATA_TIMEOUT =5 ,
+ ERROR_CHECKSUM = 6,
+ ERROR_NO_PATIENCE =7
+} ;
+
+typedef enum {
+ CELCIUS =0 ,
+ FARENHEIT =1,
+ KELVIN=2
+} eScale;
+
+
+class DHT {
+
+public:
+
+ DHT(PinName pin,int DHTtype);
+ ~DHT();
+ int readData(void);
+ float ReadHumidity(void);
+ float ReadTemperature(eScale Scale);
+ float CalcdewPoint(float celsius, float humidity);
+ float CalcdewPointFast(float celsius, float humidity);
+
+private:
+ time_t _lastReadTime;
+ float _lastTemperature;
+ float _lastHumidity;
+ PinName _pin;
+ bool _firsttime;
+ int _DHTtype;
+ int DHT_data[6];
+ float CalcTemperature();
+ float CalcHumidity();
+ float ConvertCelciustoFarenheit(float);
+ float ConvertCelciustoKelvin(float);
+
+};
+
+#endif