ILightSensor Interface for Light Sensors. More...

Detailed Description

Interface for Light Sensors

This interface is used to represent light sensors

// 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::ILightSensor* getLightSensor()
{
   upm::ILightSensor* lightSensor = NULL;
   try {
      lightSensor = new upm::SI1132(mraa_get_sub_platform_id(FT4222_I2C_BUS));
      return lightSensor;
   } catch (std::exception& e) {
      std::cerr << "SI1132: " << e.what() << std::endl;      
   }
   try {
      lightSensor = new upm::MAX44009(EDISON_I2C_BUS);
      return lightSensor;
   } catch (std::exception& e) {
      std::cerr << "MAX44009: " << e.what() << std::endl;      
   }
   return lightSensor;   
}
int main ()
{
   upm::ILightSensor* lightSensor = getLightSensor();
   if (lightSensor == NULL) {
      std::cout << "Light sensor not detected" << std::endl;                        
      return 1;
   }
   std::cout << "Light sensor " << lightSensor->getModuleName() << " detected" << std::endl;
   while (true) {
      try {
         float value = lightSensor->getVisibleLux();
         std::cout << "Light level = " << value << " lux" << std::endl;
      } catch (std::exception& e) {
         std::cerr << e.what() << std::endl;
      }
      sleep(1);         
   }
   delete lightSensor;
   return 0;
}