first commit

Software/Cpp/grove_dht_pro/grove_dht_pro.h

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+#ifndef GROVE_RGB_LCD_H
+#define GROVE_RGB_LCD_H
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <linux/i2c-dev.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdint.h>
+#include <stdexcept>
+#include <cmath>
+
+#include "grovepi.h"
+
+namespace GrovePi
+{
+  class DHT
+  {
+	  public:
+
+		  const static uint8_t BLUE_MODULE = 0;
+		  const static uint8_t WHITE_MODULE = 1;
+
+		  DHT(const uint8_t _module_type = BLUE_MODULE, const uint8_t _pin = 4)
+			  : module_type(_module_type), pin(_pin) {
+		  }
+
+		  void init();
+		  void getSafeData(float &temp, float &humidity);
+		  void getUnsafeData(float &temp, float &humidity);
+
+	  private:
+
+		  uint8_t DEVICE_FILE; // I2C device file
+		  const uint8_t module_type;
+		  const uint8_t pin;
+		  const static uint8_t DHT_TEMP_CMD = 40; // command for reaching DTH sensor on the GrovePi
+		  const static int MAX_RETRIES = 3;
+
+		  // converts the first 4 bytes of the array
+		  // into a float
+		  static const float fourBytesToFloat(uint8_t *data);
+		  static const bool areGoodReadings(int temp, int humidity);
+
+  };
+}
+
+
+#endif