//program related to LDR and LED interacting to Arduino
#include <SoftwareSerial.h>
int sensorPin = A0; //select the input pin for the LDR
int sensorValue=0; //variable to store the value coming from the sensor
int led=3;

void setup()
{//declare the ledpin as an OUTPUT:
pinMode(led.OUTPUT);
Serial.begin(9600);
}
void loop()
{
Serial.println("Sensor Reading");
sensorValue= analogRead(sensorPin);
if(sensorValue<100)
{
Serial.println("LED light on");
digitalWrite(led,HIGH);
delay(1000);
}
digitalWrite(led,LOW);
delay(sensorValue);
}