![](/media/cache/group/default_image.jpg.50x50_q85.jpg)
corrected TH02 sample program
Dependencies: mbed
Fork of TH02_humidity_temp by
th02.h
- Committer:
- superphil06
- Date:
- 2017-03-17
- Revision:
- 0:f1951c6c9187
- Child:
- 1:8326614f3037
File content as of revision 0:f1951c6c9187:
// ********************************************************************************** // Driver definition for HopeRF TH02 temperature and humidity sensor // ********************************************************************************** // Creative Commons Attrib Share-Alike License // You are free to use/extend this library but please abide with the CC-BY-SA license: // http://creativecommons.org/licenses/by-sa/4.0/ // // For any explanation see TH02 sensor information at // http://www.hoperf.com/sensor/app/TH02.htm // // Code based on following datasheet // http://www.hoperf.com/upload/sensor/TH02_V1.1.pdf // // Written by Charles-Henri Hallard (http://hallard.me) //ported to mbed env by Philippe LAURENT (IUT de NICE France) // // History : V1.00 2014-07-14 - First release // V1.10 2015-04-13 - changed to Wire library instead of I2C // // All text above must be included in any redistribution. // // ********************************************************************************** #ifndef TH02_H #define TH02_H #include <mbed.h> // // TH02 I2C Device address #define TH02_I2C_ADDR 0x40 // TH02 Registers addresses #define TH02_STATUS 0 #define TH02_DATAh 1 #define TH02_DATAl 2 #define TH02_CONFIG 3 #define TH02_ID 17 // TH02 custom error code return function #define TH02_I2C_ERR 0xFF // Unititialized values (arbitrary) #define TH02_UNINITIALIZED_TEMP 55555 // int32_t internal value #define TH02_UNINITIALIZED_RH 1111 // int32_t internal value #define TH02_UNDEFINED_VALUE 12345 // int16_t returned value // we decide error if conversion is >= 50ms #define TH02_CONVERSION_TIME_OUT 50 // Bit definition of TH02 registers values #define TH02_STATUS_RDY 0x01 #define TH02_CONFIG_START 0x01 #define TH02_CONFIG_HEAT 0x02 #define TH02_CONFIG_TEMP 0x10 #define TH02_CONFIG_HUMI 0x00 #define TH02_CONFIG_FAST 0x20 // THO2 Linearization Coefficients #define TH02_A0 -4.7844 #define TH02_A1 0.4008 #define TH02_A2 -0.00393 // TH02 Temperature compensation Linearization Coefficients #define TH02_Q0 0.1973 #define TH02_Q1 0.00237 class TH02 { public: TH02(uint8_t address); uint8_t getId(uint8_t * pvalue); uint8_t getId(void); uint8_t getStatus(uint8_t * pvalue); bool isConverting(void); uint8_t waitEndConversion(void); uint8_t getConfig(uint8_t * pvalue); uint8_t setConfig(uint8_t config); uint8_t startTempConv(bool fastmode = false, bool heater = false); uint8_t startRHConv(bool fastmode = false, bool heater = false); int16_t roundInt(float value); int16_t getConversionValue(void); int16_t getConpensatedRH(bool round); int32_t getLastRawRH(void); int32_t getLastRawTemp(void); /** * TH02 constructor * * @param sda I2C data pin * @param scl I2C clock pin * @param address I2C slave sensor address */ TH02(PinName sda, PinName scl, uint8_t address); /** * MFRC522 destructor */ ~TH02(); private: I2C m_I2C; uint8_t writeCommand(uint8_t command, bool release=true); uint8_t writeRegister(uint8_t reg, uint8_t value); uint8_t readRegister(uint8_t reg, uint8_t * value); int32_t _last_temp; // Last measured temperature (for linearization) int32_t _last_rh; // Last measured RH uint8_t _address; // I2C Module Address }; #endif