ChandanShamala Library

/*/* Grove - Light Sensor demo v1.0* * signal wire to A0.* By: http://www.seeedstudio.com*/

#include <math.h>

const int ledPin=7;                

//Connect the LED Grove module to Pin7, Digital 7

const int thresholdvalue=10;         //The threshold for which the LED should turn on. float Rsensor;

//Resistance of sensor in K

void setup() { /* Serial.begin(9600);   */          

 //Start the Serial connection 

pinMode(ledPin,OUTPUT);            //Set the LED on Digital 12 as an OUTPUT

}

void loop() { 

     int sensorValue = analogRead(0);

     Rsensor=(float)(1023-sensorValue)*10/sensorValue; 

     if(Rsensor>thresholdvalue)  {

        digitalWrite(ledPin,HIGH); 

    } 

    else  { 

      digitalWrite(ledPin,LOW);

    } 

   /*Serial.println("the analog read data is "); 

   Serial.println(sensorValue); 

   Serial.println("the sensor resistance is "); 

   Serial.println(Rsensor,DEC);//show the light intensity on the serial monitor;  */ 

   delay(1000);

}