Diff: SHT2X.h

Revision:

0:f5f628a42ba8

Child:

1:f9e3348b41a2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SHT2X.h	Fri Jun 02 05:43:32 2017 +0000
@@ -0,0 +1,77 @@
+#ifndef SHT2X_H
+#define SHT2X_H
+
+/*
+ * Constants used in communication
+ *
+ * Refer to datasheet for full explanation
+ */ 
+ 
+//Sensor I2C address
+#define SHT_I2C_ADDR        0x80
+
+//Commands...
+//Trigger Temp with hold master
+#define SHT_TRIG_TEMP_HOLD  0xE3
+//Trigger RH with hold master
+#define SHT_TRIG_RH_HOLD    0xE5
+//Trigger Temp with no hold master
+#define SHT_TRIG_TEMP       0xF3
+//Trigger RH with no hold master
+#define SHT_TRIG_RH         0xF5
+//Write to user register
+#define SHT_WRITE_REG       0xE6
+//Read from user register
+#define SHT_READ_REG        0xE7
+//Soft reset the sensor
+#define SHT_SOFT_RESET      0xFE
+
+//User Register information
+
+//Data precision settings
+//RH 12 T 14 - default
+#define SHT_PREC_1214       0x00
+//RH 8  T 10 
+#define SHT_PREC_0812       0x01
+//RH 10 T 13
+#define SHT_PREC_1013       0x80
+//RH 11 T 11
+#define SHT_PREC_1111       0x81
+
+//Battery status
+#define SHT_BATTERY_STAT    0x40
+//Enable on chip heater
+#define SHT_HEATER          0x04
+//Disable OTP reload
+#define SHT_DISABLE_OTP     0x02
+
+
+//Fail conditions on the I2C bus
+#define SHT_FAIL            1
+#define SHT_SUCCESS         0
+
+//Author fail conditions
+//1, 2, 3 can be used because these are status bits
+//in the received measurement value
+#define SHT_GOOD            0xFFFC
+#define SHT_TRIG_FAIL       1
+#define SHT_READ_FAIL       2
+
+#include "mbed.h"
+
+class SHT2X {
+    public:
+        SHT2X(I2C& i2c);
+        int readData(float *tempC, float *relHumidty);
+        int measureTemperature(float *tempC);
+        int measureHumidty(float *relHumidty);
+        int setPrecision(char precision);
+        bool softRest();
+    protected:
+        I2C m_i2c;
+        Serial pc;
+    private:
+    
+};
+
+#endif
\ No newline at end of file