This is the code of our arduino microprocessor.

1. #include <SoftwareSerial.h>
SoftwareSerial mySerial(9, 10);//10 tx 9 rx
void setup() {
pinMode(A0,INPUT);
pinMode(6,OUTPUT);
pinMode(A1,INPUT);
pinMode(A2,INPUT);
pinMode(A3,INPUT);
pinMode(5,OUTPUT);
mySerial.begin(9600);
Serial.begin(9600);
}
void loop()
{
int ldr1value=analogRead(A0); // reading inputs from sensors ldr1
int ldr2value=analogRead(A1); //ldr2
int irvalue=analogRead(A2); // IR
int ldr3value=analogRead(A3);
int f=0;
int ldrth=30; //ldr1 threshold
int ld2th=30;
Serial.print("n");
Serial.print("sensor=");
Serial.print(ldr1value);
Serial.print("n");
Serial.print("ir=");
Serial.print(irvalue);
Serial.print("n");
Serial.print("ld2=");
Serial.print(ldr2value);
Serial.print("n");
Serial.print("ld3=");
Serial.print(ldr3value);
delay(100);
if(ldr1value<ldrth) //room daylight 154//room night tubelight 83
{
digitalWrite(5,HIGH);
digitalWrite(6,HIGH);
while(ldr2value<ld2th || ldr3value<ld2th)//daylight 130/room 30
{
f++;
if(f==1)
{
if(ldr2value<ld2th)
{
Serial.println("dialling 1...");
SendMessagep1();
digitalWrite(6,HIGH);
}
else
if(ldr3value<ld2th)
{
Serial.println("dialling 2...");
SendMessagep2();
digitalWrite(5,HIGH);
}
Serial.println("message sent!!!");
delay(10);
}

2. if(ldr2value<ld2th)
{
if(irvalue<500 && ldr1value<ldrth)
{
digitalWrite(6,HIGH);
digitalWrite(6,LOW);
delay(.1);
}
else
digitalWrite(6,HIGH);
irvalue=analogRead(A2);
ldr1value=analogRead(A0);
}
else
if(ldr3value<ld2th)
{
if(irvalue<500 && ldr1value<ldrth)
{
digitalWrite(5,HIGH);
digitalWrite(5,LOW);
delay(.1);
}
else
digitalWrite(5,HIGH);
}
irvalue=analogRead(A2);
ldr1value=analogRead(A0);
ldr2value=analogRead(A1);
ldr3value=analogRead(A3);
Serial.println(f);
}
f=0;
while(irvalue<500 && ldr1value<ldrth)
{
f=0;
Serial.print("ir=");
Serial.print(irvalue);
Serial.print("n");
digitalWrite(5,HIGH);//pin 5 connected to brightness control
component
digitalWrite(5,LOW);
delay(.1);
digitalWrite(6,HIGH);
digitalWrite(6,LOW);
delay(.1);
irvalue=analogRead(A2);
ldr1value=analogRead(A0);
ldr2value=analogRead(A1);
ldr3value=analogRead(A3);
while(ldr2value<ld2th || ldr3value<ld2th)//daylight 130/room 30
{
f++;
Serial.println("dialling...");
if(f==1)
{
if(ldr2value<ld2th)
SendMessagep1();
else
if(ldr3value<ld2th)

3. SendMessagep2();
Serial.println("message sent!!!");
delay(10);
}
ldr2value=analogRead(A1);
ldr3value=analogRead(A3);
if(ldr2value<ld2th)
{
if(irvalue<500 && ldr1value<ldrth)
{
digitalWrite(6,HIGH);
digitalWrite(6,LOW);
delay(.1);
}
else
digitalWrite(6,HIGH);
irvalue=analogRead(A2);
ldr1value=analogRead(A0);
}
else
if(ldr3value<ld2th)
{
if(irvalue<500 && ldr1value<ldrth)
{
digitalWrite(5,HIGH);
digitalWrite(5,LOW);
delay(.1);
}
else
digitalWrite(5,HIGH);
irvalue=analogRead(A2);
ldr1value=analogRead(A0);
}
Serial.println(f);
ldr2value=analogRead(A1);
ldr3value=analogRead(A3);
}
}
}
else
{
digitalWrite(5,LOW);
digitalWrite(6,LOW);
}
}
void SendMessagep1()
{
mySerial.println("AT+CMGF=1");
delay(1000);
mySerial.println("AT+CMGS="+919495810714"r");
delay(1000);
mySerial.println("https://www.google.com/maps/preview/@9.5503466,76.612264,17.44
z post no 1 complaint");
delay(1000);
mySerial.println((char)26);
delay(1000);
}

4. void SendMessagep2()
{
mySerial.println("AT+CMGF=1");
delay(1000);
mySerial.println("AT+CMGS="+919495810714"r");
delay(1000);
mySerial.println("https://www.google.com/maps/preview/@9.5503466,76.612264,17.44
z post no 2 complaint");
delay(1000);
mySerial.println((char)26);
delay(1000);
}