Oscar Silva / Sht31

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Fork of Sht31 by Andrea Corrado

Sht31.h@3:c4bd8cd5d566, 2018-10-03 (annotated)

Committer:
osilvam
Date:
Wed Oct 03 13:51:56 2018 +0000
Revision:
3:c4bd8cd5d566
Parent:
0:c90aa4f69539 
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
GeofferyOmlette 0:c90aa4f69539 1 /***************************************************
GeofferyOmlette 0:c90aa4f69539 2 This is a library for the SHT31 Digital Humidity & Temp Sht31
GeofferyOmlette 0:c90aa4f69539 3
GeofferyOmlette 0:c90aa4f69539 4 Designed specifically to work with the SHT31 Digital Sht31 from Adafruit
GeofferyOmlette 0:c90aa4f69539 5 ----> https://www.adafruit.com/products/2857
GeofferyOmlette 0:c90aa4f69539 6
GeofferyOmlette 0:c90aa4f69539 7 These displays use I2C to communicate, 2 pins are required to
GeofferyOmlette 0:c90aa4f69539 8 interface
GeofferyOmlette 0:c90aa4f69539 9 Adafruit invests time and resources providing this open source code,
GeofferyOmlette 0:c90aa4f69539 10 please support Adafruit and open-source hardware by purchasing
GeofferyOmlette 0:c90aa4f69539 11 products from Adafruit!
GeofferyOmlette 0:c90aa4f69539 12
GeofferyOmlette 0:c90aa4f69539 13 Written by Limor Fried/Ladyada for Adafruit Industries.
GeofferyOmlette 0:c90aa4f69539 14 BSD license, all text above must be included in any redistribution
GeofferyOmlette 0:c90aa4f69539 15 ****************************************************/
GeofferyOmlette 0:c90aa4f69539 16
GeofferyOmlette 0:c90aa4f69539 17 #ifndef Sht31_H
GeofferyOmlette 0:c90aa4f69539 18 #define Sht31_H
GeofferyOmlette 0:c90aa4f69539 19
GeofferyOmlette 0:c90aa4f69539 20 #include "mbed.h"
GeofferyOmlette 0:c90aa4f69539 21
GeofferyOmlette 0:c90aa4f69539 22 #define SHT31_DEFAULT_ADDR 0x44
GeofferyOmlette 0:c90aa4f69539 23 #define SHT31_MEAS_HIGHREP_STRETCH 0x2C06
GeofferyOmlette 0:c90aa4f69539 24 #define SHT31_MEAS_MEDREP_STRETCH 0x2C0D
GeofferyOmlette 0:c90aa4f69539 25 #define SHT31_MEAS_LOWREP_STRETCH 0x2C10
GeofferyOmlette 0:c90aa4f69539 26 #define SHT31_MEAS_HIGHREP 0x2400
GeofferyOmlette 0:c90aa4f69539 27 #define SHT31_MEAS_MEDREP 0x240B
GeofferyOmlette 0:c90aa4f69539 28 #define SHT31_MEAS_LOWREP 0x2416
GeofferyOmlette 0:c90aa4f69539 29 #define SHT31_READSTATUS 0xF32D
GeofferyOmlette 0:c90aa4f69539 30 #define SHT31_CLEARSTATUS 0x3041
GeofferyOmlette 0:c90aa4f69539 31 #define SHT31_SOFTRESET 0x30A2
GeofferyOmlette 0:c90aa4f69539 32 #define SHT31_HEATEREN 0x306D
GeofferyOmlette 0:c90aa4f69539 33 #define SHT31_HEATERDIS 0x3066
GeofferyOmlette 0:c90aa4f69539 34
GeofferyOmlette 0:c90aa4f69539 35 class Sht31 {
GeofferyOmlette 0:c90aa4f69539 36 public:
osilvam 3:c4bd8cd5d566 37 Sht31(PinName sda, PinName scl, bool i2caddr);
GeofferyOmlette 0:c90aa4f69539 38 float readTemperature(void);
GeofferyOmlette 0:c90aa4f69539 39 float readHumidity(void);
osilvam 3:c4bd8cd5d566 40 bool readTempHum(float &_temp, float &_humidity);
GeofferyOmlette 0:c90aa4f69539 41
GeofferyOmlette 0:c90aa4f69539 42 private:
GeofferyOmlette 0:c90aa4f69539 43 void reset(void);
GeofferyOmlette 0:c90aa4f69539 44 uint16_t readStatus(void);
GeofferyOmlette 0:c90aa4f69539 45 void writeCommand(uint16_t cmd);
GeofferyOmlette 0:c90aa4f69539 46 bool readTempHum(void);
GeofferyOmlette 0:c90aa4f69539 47 uint8_t crc8(const uint8_t *data, int len);
GeofferyOmlette 0:c90aa4f69539 48
GeofferyOmlette 0:c90aa4f69539 49 I2C _i2c;
GeofferyOmlette 0:c90aa4f69539 50 int _i2caddr;
GeofferyOmlette 0:c90aa4f69539 51 float humidity, temp;
GeofferyOmlette 0:c90aa4f69539 52 };
GeofferyOmlette 0:c90aa4f69539 53
GeofferyOmlette 0:c90aa4f69539 54 #endif