USING SIM800L GSM MODULE AND ARDUINO TO SEND SMS AND MAKE CALLS.

#include <SoftwareSerial.h>

//Create software serial object to communicate with SIM800L
SoftwareSerial mySerial(12, 13);

void setup() {
  //Begin serial communication with Arduino and Arduino IDE (Serial Monitor)
  Serial.begin(9600);
  
  //Begin serial communication with Arduino and SIM800L
  mySerial.begin(9600);

  Serial.println("Initializing..."); 
  delay(1000);
sendSMS();
delay(22000);
}

void sendSMS(){
  mySerial.println("AT"); //Once the handshake test is successful, it will back to OK
  updateSerial();

  mySerial.println("AT+CMGF=1"); // Configuring TEXT mode
  updateSerial();
  mySerial.println("AT+CMGS=\"+ZZ8xxxxx\"");//change ZZ with country code and xxxxxxxxxxx with phone number to sms
  updateSerial();
  mySerial.print("Hello, can you read me?");// + String(tg)); //text content
  updateSerial();
  mySerial.write(26);
}


void loop() {
  }

void updateSerial(){
  delay(500);
  while (Serial.available()) 
  {
    mySerial.write(Serial.read());//Forward what Serial received to Software Serial Port
  }
  while(mySerial.available()) 
  {
    Serial.write(mySerial.read());//Forward what Software Serial received to Serial Port
  }
}

#include <SoftwareSerial.h>
// Configure software serial port
SoftwareSerial MySerial(12, 13); //tx and rx

// Relay connected to pin 12
const int lampPin1 = 7;
const int lampPin2 = 8;
const int lampPin3 = 9;

String textMessage;

void setup() {
   // Set LED as OUTPUT
  pinMode(lampPin1, OUTPUT);
  pinMode(lampPin2, OUTPUT);
  pinMode(lampPin3, OUTPUT);

  // By default the LED is off
  digitalWrite(lampPin1, LOW);
  digitalWrite(lampPin2, LOW);
  digitalWrite(lampPin3, LOW);
 
  // Initializing serial commmunication
  Serial.begin(9600);
  MySerial.begin(9600);

  Serial.print("SIM800 ready...");
  delay(1000);
   // AT command to set SIM900 to SMS mode
  MySerial.print("AT+CMGF=1\r");
  delay(100);
  // Set module to send SMS data to serial out upon receipt
  MySerial.print("AT+CNMI=2,2,0,0,0\r");
  delay(100);
}


String controlCommandFxn(){
  //create a Command for SMS
 
  if(MySerial.available()>0){
    textMessage = MySerial.readString();
    Serial.print(textMessage);    
    delay(10);
}
return checkStatus;
}

void loop(){
controlCommandFxn();
}


// Clearing the Buffer in the SMS section
void updateSerial(){
  delay(500);
  while (Serial.available()) 
  {
    MySerial.write(Serial.read());//Forward what Serial received to Software Serial Port
  }
  while(MySerial.available()) 
  {
    Serial.write(MySerial.read());//Forward what Software Serial received to Serial Port
  }
}

#include <SoftwareSerial.h>

//Create software serial object to communicate with SIM800L
SoftwareSerial mySerial(12, 13);

void setup() {
  //Begin serial communication with Arduino and Arduino IDE (Serial Monitor)
  Serial.begin(9600);
  
  //Begin serial communication with Arduino and SIM800L
  mySerial.begin(9600);

  Serial.println("Initializing..."); 
  delay(1000);
 makeCall();
 delay(5000);
}

void makeCall(){
  mySerial.println("AT"); //Once the handshake test is successful, i t will back to OK
  updateSerial();
  
  mySerial.println("ATD+ +ZZZxxxxxxx;"); //  change ZZ with country code and xxxxxxxxxxx with phone number to dial
  updateSerial();
  delay(20000); // wait for 20 seconds...
  mySerial.println("ATH"); //hang up
  updateSerial();
}


void loop() {
  }

void updateSerial(){
  delay(500);
  while (Serial.available()) 
  {
    mySerial.write(Serial.read());//Forward what Serial received to Software Serial Port
  }
  while(mySerial.available()) 
  {
    Serial.write(mySerial.read());//Forward what Software Serial received to Serial Port
  }
}