Tristan Hughes / RHT03

An eddied version of http://mbed.org/users/crazystick/code/DHT22/ for LPC11U24. All printf statements are removed and features requiring the real time clock are removed.

Dependents:   RHT03_HelloWorld IOT_sensor_nfc CanSat_Alex cansat_alex_v1 ... more

RHT03.h@5:153e20f26d54, 2012-08-29 (annotated)

Committer:
tristanjph
Date:
Wed Aug 29 14:38:08 2012 +0000
Revision:
5:153e20f26d54
Parent:
4:e9fe691122c1 
Documentation update

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tristanjph 1:2bd5cffd60d0 1 /* mbed RHT03 Library
tristanjph 5:153e20f26d54 2 Copyright (c) 2011, sford, http://mbed.org
tristanjph 5:153e20f26d54 3 Modifications by Tristan Hughes
tristanjph 5:153e20f26d54 4
tristanjph 5:153e20f26d54 5 Permission is hereby granted, free of charge, to any person obtaining a copy
tristanjph 5:153e20f26d54 6 of this software and associated documnetation files (the "Software"), to deal
tristanjph 5:153e20f26d54 7 in the Software without restriction, including without limitation the rights
tristanjph 5:153e20f26d54 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
tristanjph 5:153e20f26d54 9 copies of the Software, and to permit persons to whom the Software is
tristanjph 5:153e20f26d54 10 furished to do so, subject to the following conditions:
tristanjph 5:153e20f26d54 11
tristanjph 5:153e20f26d54 12 The above copyright notice and this permission notice shall be included in
tristanjph 5:153e20f26d54 13 all copies or substantial portions of the Software.
tristanjph 5:153e20f26d54 14
tristanjph 5:153e20f26d54 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
tristanjph 5:153e20f26d54 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
tristanjph 5:153e20f26d54 17 FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
tristanjph 5:153e20f26d54 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
tristanjph 5:153e20f26d54 19 LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
tristanjph 5:153e20f26d54 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
tristanjph 5:153e20f26d54 21 THE SOFTWARE.
tristanjph 1:2bd5cffd60d0 22 */
tristanjph 1:2bd5cffd60d0 23
tristanjph 1:2bd5cffd60d0 24 #ifndef MBED_RHT03_H
tristanjph 1:2bd5cffd60d0 25 #define MBED_RHT03_H
tristanjph 1:2bd5cffd60d0 26
tristanjph 1:2bd5cffd60d0 27 #include "mbed.h"
tristanjph 1:2bd5cffd60d0 28
tristanjph 1:2bd5cffd60d0 29
tristanjph 1:2bd5cffd60d0 30 #define RHT03_ERROR_VALUE -99.5
tristanjph 1:2bd5cffd60d0 31
tristanjph 1:2bd5cffd60d0 32 typedef enum {
tristanjph 1:2bd5cffd60d0 33 RHT_ERROR_NONE = 0,
tristanjph 1:2bd5cffd60d0 34 RHT_BUS_HUNG,
tristanjph 1:2bd5cffd60d0 35 RHT_ERROR_NOT_PRESENT,
tristanjph 1:2bd5cffd60d0 36 RHT_ERROR_ACK_TOO_LONG,
tristanjph 1:2bd5cffd60d0 37 RHT_ERROR_SYNC_TIMEOUT,
tristanjph 1:2bd5cffd60d0 38 RHT_ERROR_DATA_TIMEOUT,
tristanjph 1:2bd5cffd60d0 39 RHT_ERROR_CHECKSUM,
tristanjph 1:2bd5cffd60d0 40 RHT_ERROR_TOO_QUICK
tristanjph 1:2bd5cffd60d0 41 } RHT03_ERROR;
tristanjph 1:2bd5cffd60d0 42
tristanjph 3:21ede1fe79b7 43 /** RHT03 interface class for reading data from the sensor */
tristanjph 2:b07365121071 44 class RHT03
tristanjph 2:b07365121071 45 {
tristanjph 1:2bd5cffd60d0 46 private:
tristanjph 1:2bd5cffd60d0 47 time_t _lastReadTime;
tristanjph 1:2bd5cffd60d0 48 PinName _data;
tristanjph 1:2bd5cffd60d0 49 float _lastHumidity;
tristanjph 1:2bd5cffd60d0 50 float _lastTemperature;
tristanjph 1:2bd5cffd60d0 51 public:
tristanjph 2:b07365121071 52 /** Configure data pin
tristanjph 2:b07365121071 53 * @param Data The data pin the RHT03 is attached to
tristanjph 2:b07365121071 54 */
tristanjph 1:2bd5cffd60d0 55 RHT03(PinName Data);
tristanjph 1:2bd5cffd60d0 56 ~RHT03();
tristanjph 2:b07365121071 57 /** Reads data from the RHT03
tristanjph 2:b07365121071 58 * @return error type or successful read
tristanjph 2:b07365121071 59 */
tristanjph 1:2bd5cffd60d0 60 RHT03_ERROR readData(void);
tristanjph 2:b07365121071 61 /** Gives current humidity value
tristanjph 2:b07365121071 62 * @return humidity value
tristanjph 2:b07365121071 63 */
tristanjph 1:2bd5cffd60d0 64 float getHumidity();
tristanjph 2:b07365121071 65 /** Gives current temperature value
tristanjph 2:b07365121071 66 * @return temperature value
tristanjph 2:b07365121071 67 */
tristanjph 1:2bd5cffd60d0 68 float getTemperatureC();
tristanjph 1:2bd5cffd60d0 69 void clockReset();
tristanjph 1:2bd5cffd60d0 70 };
tristanjph 1:2bd5cffd60d0 71
tristanjph 1:2bd5cffd60d0 72 #endif /*_RHT03_H_*/