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Dependencies:   mbed

DHT.h@0:2d8f1aed9d70, 2020-07-06 (annotated)

Committer:
bernard_arnault
Date:
Mon Jul 06 13:59:08 2020 +0000
Revision:
0:2d8f1aed9d70
First draft NUCELO-LK32KC and DHT11

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bernard_arnault 0:2d8f1aed9d70 1 /*
bernard_arnault 0:2d8f1aed9d70 2 * DHT Library for Digital-output Humidity and Temperature sensors
bernard_arnault 0:2d8f1aed9d70 3 *
bernard_arnault 0:2d8f1aed9d70 4 * Works with DHT11, DHT21, DHT22
bernard_arnault 0:2d8f1aed9d70 5 * SEN11301P, Grove - Temperature&Humidity Sensor (Seeed Studio)
bernard_arnault 0:2d8f1aed9d70 6 * SEN51035P, Grove - Temperature&Humidity Sensor Pro (Seeed Studio)
bernard_arnault 0:2d8f1aed9d70 7 * AM2302 , temperature-humidity sensor
bernard_arnault 0:2d8f1aed9d70 8 * RHT01,RHT02, RHT03 , Humidity and Temperature Sensor (Sparkfun)
bernard_arnault 0:2d8f1aed9d70 9 *
bernard_arnault 0:2d8f1aed9d70 10 * Copyright (C) Wim De Roeve
bernard_arnault 0:2d8f1aed9d70 11 * based on DHT22 sensor library by HO WING KIT
bernard_arnault 0:2d8f1aed9d70 12 * Arduino DHT11 library
bernard_arnault 0:2d8f1aed9d70 13 *
bernard_arnault 0:2d8f1aed9d70 14 * Permission is hereby granted, free of charge, to any person obtaining a copy
bernard_arnault 0:2d8f1aed9d70 15 * of this software and associated documnetation files (the "Software"), to deal
bernard_arnault 0:2d8f1aed9d70 16 * in the Software without restriction, including without limitation the rights
bernard_arnault 0:2d8f1aed9d70 17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
bernard_arnault 0:2d8f1aed9d70 18 * copies of the Software, and to permit persons to whom the Software is
bernard_arnault 0:2d8f1aed9d70 19 * furished to do so, subject to the following conditions:
bernard_arnault 0:2d8f1aed9d70 20 *
bernard_arnault 0:2d8f1aed9d70 21 * The above copyright notice and this permission notice shall be included in
bernard_arnault 0:2d8f1aed9d70 22 * all copies or substantial portions of the Software.
bernard_arnault 0:2d8f1aed9d70 23 *
bernard_arnault 0:2d8f1aed9d70 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
bernard_arnault 0:2d8f1aed9d70 25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
bernard_arnault 0:2d8f1aed9d70 26 * FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
bernard_arnault 0:2d8f1aed9d70 27 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
bernard_arnault 0:2d8f1aed9d70 28 * LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
bernard_arnault 0:2d8f1aed9d70 29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
bernard_arnault 0:2d8f1aed9d70 30 * THE SOFTWARE.
bernard_arnault 0:2d8f1aed9d70 31 */
bernard_arnault 0:2d8f1aed9d70 32
bernard_arnault 0:2d8f1aed9d70 33 #ifndef MBED_DHT_H
bernard_arnault 0:2d8f1aed9d70 34 #define MBED_DHT_H
bernard_arnault 0:2d8f1aed9d70 35
bernard_arnault 0:2d8f1aed9d70 36 #include "mbed.h"
bernard_arnault 0:2d8f1aed9d70 37
bernard_arnault 0:2d8f1aed9d70 38 enum eType{
bernard_arnault 0:2d8f1aed9d70 39 DHT11 = 11,
bernard_arnault 0:2d8f1aed9d70 40 SEN11301P = 11,
bernard_arnault 0:2d8f1aed9d70 41 RHT01 = 11,
bernard_arnault 0:2d8f1aed9d70 42 DHT22 = 22,
bernard_arnault 0:2d8f1aed9d70 43 AM2302 = 22,
bernard_arnault 0:2d8f1aed9d70 44 SEN51035P = 22,
bernard_arnault 0:2d8f1aed9d70 45 RHT02 = 22,
bernard_arnault 0:2d8f1aed9d70 46 RHT03 = 22
bernard_arnault 0:2d8f1aed9d70 47 } ;
bernard_arnault 0:2d8f1aed9d70 48
bernard_arnault 0:2d8f1aed9d70 49 enum eError {
bernard_arnault 0:2d8f1aed9d70 50 ERROR_NONE = 0,
bernard_arnault 0:2d8f1aed9d70 51 BUS_BUSY =1,
bernard_arnault 0:2d8f1aed9d70 52 ERROR_NOT_PRESENT =2 ,
bernard_arnault 0:2d8f1aed9d70 53 ERROR_ACK_TOO_LONG =3 ,
bernard_arnault 0:2d8f1aed9d70 54 ERROR_SYNC_TIMEOUT = 4,
bernard_arnault 0:2d8f1aed9d70 55 ERROR_DATA_TIMEOUT =5 ,
bernard_arnault 0:2d8f1aed9d70 56 ERROR_CHECKSUM = 6,
bernard_arnault 0:2d8f1aed9d70 57 ERROR_NO_PATIENCE =7
bernard_arnault 0:2d8f1aed9d70 58 } ;
bernard_arnault 0:2d8f1aed9d70 59
bernard_arnault 0:2d8f1aed9d70 60 typedef enum {
bernard_arnault 0:2d8f1aed9d70 61 CELCIUS =0 ,
bernard_arnault 0:2d8f1aed9d70 62 FARENHEIT =1,
bernard_arnault 0:2d8f1aed9d70 63 KELVIN=2
bernard_arnault 0:2d8f1aed9d70 64 } eScale;
bernard_arnault 0:2d8f1aed9d70 65
bernard_arnault 0:2d8f1aed9d70 66 class DHT {
bernard_arnault 0:2d8f1aed9d70 67 public:
bernard_arnault 0:2d8f1aed9d70 68 DHT(PinName pin,int DHTtype);
bernard_arnault 0:2d8f1aed9d70 69 ~DHT();
bernard_arnault 0:2d8f1aed9d70 70 int readData(void);
bernard_arnault 0:2d8f1aed9d70 71 float ReadHumidity(void);
bernard_arnault 0:2d8f1aed9d70 72 float ReadTemperature(eScale Scale);
bernard_arnault 0:2d8f1aed9d70 73 float CalcdewPoint(float celsius, float humidity);
bernard_arnault 0:2d8f1aed9d70 74 float CalcdewPointFast(float celsius, float humidity);
bernard_arnault 0:2d8f1aed9d70 75
bernard_arnault 0:2d8f1aed9d70 76 private:
bernard_arnault 0:2d8f1aed9d70 77 time_t _lastReadTime;
bernard_arnault 0:2d8f1aed9d70 78 float _lastTemperature;
bernard_arnault 0:2d8f1aed9d70 79 float _lastHumidity;
bernard_arnault 0:2d8f1aed9d70 80 PinName _pin;
bernard_arnault 0:2d8f1aed9d70 81 bool _firsttime;
bernard_arnault 0:2d8f1aed9d70 82 int _DHTtype;
bernard_arnault 0:2d8f1aed9d70 83 int DHT_data[6];
bernard_arnault 0:2d8f1aed9d70 84 float CalcTemperature();
bernard_arnault 0:2d8f1aed9d70 85 float CalcHumidity();
bernard_arnault 0:2d8f1aed9d70 86 float ConvertCelciustoFarenheit(float);
bernard_arnault 0:2d8f1aed9d70 87 float ConvertCelciustoKelvin(float);
bernard_arnault 0:2d8f1aed9d70 88 };
bernard_arnault 0:2d8f1aed9d70 89 #endif