sms alarm pintu sim800

int level1 = 5;
int level2 = 7;
int level3 = 8;

int sensorPintu1;
int sensorPintu2;
int sensorPintu3;

int hold_key = 0;

void kirimSMS();
void kirimSMS2();
void kirimSMS3();

void read_sensor();
void smsPintu1();
void smsPintu2();
void smsPintu3();

void setup() {
// put your setup code here, to run once:
pinMode(level1,INPUT);
pinMode(level2,INPUT);
pinMode(level3,INPUT);
Serial.begin(115200);
delay(2000);
delay(2000);
delay(2000);
}

void loop() {
// put your main code here, to run repeatedly:
read_sensor();
delay(1000);
}

void read_sensor(){
sensorPintu1 = digitalRead(level1);
sensorPintu2 = digitalRead(level2);
sensorPintu3 = digitalRead(level3);

if ( sensorPintu1 == 0 && sensorPintu2 == 0 && sensorPintu3 == 0 ){
hold_key = 0;
Serial.println("SYSTEM AMAN, SENSOR MEMBACA");

}

else if ( sensorPintu1 == 1 && sensorPintu2 == 0 && sensorPintu3 == 0 ){
if ( hold_key == 0){
//isi pesan sms disini
kirimSMS();
smsPintu1();

kirimSMS2();
smsPintu1();

kirimSMS3();
smsPintu1();
hold_key = 1;
}
}

else if ( sensorPintu1 == 1 && sensorPintu2 == 1 && sensorPintu3 == 0 ){

if ( hold_key == 1){
//isi pesan sms disini
kirimSMS();
smsPintu2();

kirimSMS2();
smsPintu2();

kirimSMS3();
smsPintu2();

hold_key = 2;
}
}

else if ( sensorPintu1 == 1 && sensorPintu2 == 1 && sensorPintu3 == 1 ){
if ( hold_key == 2){
//isi pesan sms disini
kirimSMS();
smsPintu3();

kirimSMS2();
smsPintu3();

kirimSMS3();
smsPintu3();

hold_key = 3;
}
}
}

void kirimSMS(){
delay(1000);
Serial.print("AT\r\n");
delay(2000);
Serial.print("AT+CMGF=1\r\n");
delay(2000);
Serial.print("AT+CMGS=\"+6282168073459\"\r\n");
delay(2000);
}

void kirimSMS2(){
delay(1000);
Serial.print("AT\r\n");
delay(2000);
Serial.print("AT+CMGF=1\r\n");
delay(2000);
Serial.print("AT+CMGS=\"+6285270466336\"\r\n");
delay(2000);

}
void kirimSMS3(){
delay(1000);
Serial.print("AT\r\n");
delay(2000);
Serial.print("AT+CMGF=1\r\n");
delay(2000);
Serial.print("AT+CMGS=\"+6282256819064\"\r\n");
delay(2000);

}

void smsPintu1(){
Serial.print("WARNING !!!\r\n");
Serial.print("PINTU 1\r\n");
Serial.print("LIHAT KERUANGAN 1\r\n");
delay(1500);
Serial.print(char(26));
}

void smsPintu2(){
Serial.print("WARNING !!!\r\n");
Serial.print("PINTU 2\r\n");
Serial.print("LIHAT KERUANGAN 2\r\n");
delay(1500);
Serial.print(char(26));
}

void smsPintu3(){
Serial.print("WARNING !!!\r\n");
Serial.print("PINTU 3\r\n");
Serial.print("LIHAT KERUANGAN 3\r\n");
delay(1500);
Serial.print(char(26));
}