upm/examples/c++/interfaces-humiditysensor.cxx

/*
 * Author: Henry Bruce <henry.bruce@intel.com>
 * Copyright (c) 2015 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <unistd.h>
#include <iostream>
#include "si7005.hpp"
#include "bme280.hpp"

#define EDISON_I2C_BUS 1 
#define FT4222_I2C_BUS 0

 #define EDISON_GPIO_SI7005_CS 20

//! [Interesting]
// Simple example of using ILightSensor to determine 
// which sensor is present and return its name.
// ILightSensor is then used to get readings from sensor


upm::IHumiditySensor* getHumiditySensor()
{
   upm::IHumiditySensor* humiditySensor = NULL;

   try {
	humiditySensor = new upm::BME280 (mraa_get_sub_platform_id(FT4222_I2C_BUS));
	return humiditySensor ;
   } catch (std::exception& e)
   {
	std::cerr <<"BME280: "<<e.what() << std::endl;
   }
	
   try {
      humiditySensor = new upm::SI7005(EDISON_I2C_BUS, EDISON_GPIO_SI7005_CS);
      return humiditySensor;
   } catch (std::exception& e) {
      std::cerr << "SI7005: " << e.what() << std::endl;      
   }
   return humiditySensor;   
}

int main ()
{
   upm::IHumiditySensor* humiditySensor = getHumiditySensor();
   if (humiditySensor == NULL) {
      std::cout << "Humidity sensor not detected" << std::endl;                        
      return 1;
   }
   std::cout << "Humidity sensor " << humiditySensor->getModuleName() << " detected" << std::endl;
   while (true) {
      try {
         int value = humiditySensor->getHumidityRelative();
         std::cout << "Humidity = " << value << "%" << std::endl;
      } catch (std::exception& e) {
         std::cerr << e.what() << std::endl;
      }
      sleep(1);         
   }
   delete humiditySensor;
   return 0;
}

//! [Interesting]