// humidity.nqc

#define DRY	SENSOR_1
#define WET	SENSOR_2

// uncomment this line for Radio Shack adjustmet
//#define RADIO_SHACK_ADJUST

task main()
{
    int wet, dry, hum;

    // configure the sensors
    SetSensor(DRY, SENSOR_FAHRENHEIT);
    SetSensor(WET, SENSOR_FAHRENHEIT);

    // read the sensors
    #ifdef RADIO_SHACK_ADJUST
        dry = DRY * 7 / 6 - 120;
        wet = WET * 7 / 6 - 120;
    #else
        dry = DRY;
        wet = WET;
    #endif

    // compute humidity
    wet /= 10;
    dry /= 10;
    hum = (wet - dry) * 310 / dry + 100;
}