Diff: Sht31.h

Revision:

0:c90aa4f69539

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Sht31.h	Wed Jul 20 16:51:28 2016 +0000
@@ -0,0 +1,53 @@
+/***************************************************
+  This is a library for the SHT31 Digital Humidity & Temp Sht31
+
+  Designed specifically to work with the SHT31 Digital Sht31 from Adafruit
+  ----> https://www.adafruit.com/products/2857
+
+  These displays use I2C to communicate, 2 pins are required to
+  interface
+  Adafruit invests time and resources providing this open source code,
+  please support Adafruit and open-source hardware by purchasing
+  products from Adafruit!
+
+  Written by Limor Fried/Ladyada for Adafruit Industries.
+  BSD license, all text above must be included in any redistribution
+ ****************************************************/
+
+#ifndef Sht31_H
+#define Sht31_H
+
+#include "mbed.h"
+
+#define SHT31_DEFAULT_ADDR          0x44
+#define SHT31_MEAS_HIGHREP_STRETCH  0x2C06
+#define SHT31_MEAS_MEDREP_STRETCH   0x2C0D
+#define SHT31_MEAS_LOWREP_STRETCH   0x2C10
+#define SHT31_MEAS_HIGHREP          0x2400
+#define SHT31_MEAS_MEDREP           0x240B
+#define SHT31_MEAS_LOWREP           0x2416
+#define SHT31_READSTATUS            0xF32D
+#define SHT31_CLEARSTATUS           0x3041
+#define SHT31_SOFTRESET             0x30A2
+#define SHT31_HEATEREN              0x306D
+#define SHT31_HEATERDIS             0x3066
+
+class Sht31 {
+public:
+    Sht31(PinName sda, PinName scl);
+    float readTemperature(void);
+    float readHumidity(void);
+
+private:
+    void reset(void);
+    uint16_t readStatus(void);
+    void writeCommand(uint16_t cmd);
+    bool readTempHum(void);
+    uint8_t crc8(const uint8_t *data, int len);
+
+    I2C _i2c;
+    int _i2caddr;
+    float humidity, temp;
+};
+
+#endif