Adds HTU31D

Closes #721

Author: tyeth

src/components/i2c/controller.cpp

@@ -123,6 +123,11 @@ static const std::map<std::string, FnCreateI2CDriver> I2cFactory = {
         const char *driver_name) -> drvBase * {
        return new drvHtu21d(i2c, addr, mux_channel, driver_name);
      }},
+    {"htu31d",
+     [](TwoWire *i2c, uint16_t addr, uint32_t mux_channel,
+        const char *driver_name) -> drvBase * {
+       return new drvHtu31d(i2c, addr, mux_channel, driver_name);
+     }},
     {"ina219",
      [](TwoWire *i2c, uint16_t addr, uint32_t mux_channel,
         const char *driver_name) -> drvBase * {

src/components/i2c/controller.h

@@ -30,6 +30,7 @@
 #include "drivers/drvDs2484.h"
 #include "drivers/drvEns160.h"
 #include "drivers/drvHts221.h"
+#include "drivers/drvHtu31d.h"
 #include "drivers/drvHtu21d.h"
 #include "drivers/drvIna219.h"
 #include "drivers/drvLc709203f.h"

src/components/i2c/drivers/drvHtu31d.h

@@ -0,0 +1,90 @@
+/*!
+ * @file drvHtu31d.h
+ *
+ * Device driver for an HTU31D Humidity and Temperature sensor.
+ */
+
+#ifndef DRV_HTU31D_H
+#define DRV_HTU31D_H
+
+#include "drvBase.h"
+#include <Adafruit_HTU31D.h>
+
+/**************************************************************************/
+/*!
+    @brief  Class that provides a sensor driver for the HTU31D humidity and
+            temperature sensor.
+*/
+/**************************************************************************/
+class drvHtu31d : public drvBase {
+
+public:
+  /*******************************************************************************/
+  /*!
+      @brief    Constructor for an HTU31D sensor.
+      @param    i2c
+                The I2C interface.
+      @param    sensorAddress
+                7-bit device address.
+      @param    mux_channel
+                The I2C multiplexer channel.
+      @param    driver_name
+                The name of the driver.
+  */
+  /*******************************************************************************/
+  drvHtu31d(TwoWire *i2c, uint16_t sensorAddress, uint32_t mux_channel,
+            const char *driver_name)
+      : drvBase(i2c, sensorAddress, mux_channel, driver_name) {
+    // Initialization handled by drvBase constructor
+  }
+
+  /*******************************************************************************/
+  /*!
+      @brief    Destructor for an HTU31D sensor.
+  */
+  /*******************************************************************************/
+  ~drvHtu31d() { delete _htu31d; }
+
+  /*******************************************************************************/
+  /*!
+      @brief    Initializes the HTU31D sensor and begins I2C.
+      @returns  True if initialized successfully, False otherwise.
+
+  */
+  /*******************************************************************************/
+  bool begin() {
+    // attempt to initialize the HTU31D using the I2C interface
+    _htu31d = new Adafruit_HTU31D();
+    return _htu31d->begin(_address, _i2c);
+  }
+
+  /*******************************************************************************/
+  /*!
+      @brief    Gets the HTU31D's current temperature.
+      @param    tempEvent
+                Pointer to an Adafruit_Sensor event.
+      @returns  True if the temperature was obtained successfully, False
+                otherwise.
+  */
+  /*******************************************************************************/
+  bool getEventAmbientTemp(sensors_event_t *tempEvent) {
+    return _htu31d->getEvent(nullptr, tempEvent);
+  }
+
+  /*******************************************************************************/
+  /*!
+      @brief    Gets the HTU31D's current humidity.
+      @param    humidEvent
+                Pointer to an Adafruit_Sensor event.
+      @returns  True if the humidity was obtained successfully, False
+                otherwise.
+  */
+  /*******************************************************************************/
+  bool getEventRelativeHumidity(sensors_event_t *humidEvent) {
+    return _htu31d->getEvent(humidEvent, nullptr);
+  }
+
+protected:
+  Adafruit_HTU31D *_htu31d; ///< Pointer to an HTU31D object
+};
+#endif // DRV_HTU31D_H