Send Arabic SMS using SIM900A

// Send Arabic SMS using SIM900A

#include <SoftwareSerial.h>
SoftwareSerial SIM900A(10, 11);
void setup()
{
  pinMode(buz, OUTPUT);
  pinMode(gnd, OUTPUT);
  digitalWrite(gnd, LOW);

  SIM900A.begin(9600);   // Setting the baud rate of GSM Module
  Serial.begin(9600);    // Setting the baud rate of Serial Monitor (Arduino)
  Serial.println ("SIM900A Ready");
  delay(100);
  Serial.println ("Type s to send message or r to receive message");
}
void loop()
{

  if (Serial.available() > 0)
    switch (Serial.read())
    {
      case 's':
        SendMessageArabic();
        break;
      case 'r':
        //      RecieveMessage();
        break;
    }
  if (SIM900A.available() > 0)
    Serial.write(SIM900A.read());

}


void SendMessageArabic()
{
  Serial.println ("Sending Message");
  SIM900A.println("AT+CSCS=\"HEX\"\r");
  delay(1000);
  SIM900A.println("AT+CSMP=17,167,0,8\r");
  delay(1000);
  SIM900A.println("AT+CMGF=1");    //Sets the GSM Module in Text Mode
  delay(1000);
  Serial.println ("Set SMS Number");
  // https://www.branah.com/unicode-converter
  // for phone number convert to (UTF-8) and (Remove \x)
  SIM900A.println("AT+CMGS=\"2b393636353534383733343631\""); //Mobile phone number to send message +966554873461  //2b393636353534383733343631
  delay(1000);
  Serial.println ("Set SMS Content");
  // for message convert to (UTF-16) and (Remove \u)
  SIM900A.println("06450631062d0628062700200643064a064106430020");// Messsage content
  delay(100);
  Serial.println ("Finish");
  SIM900A.println("\x1A");// ASCII code of CTRL+Z
  delay(1000);
  Serial.println ("Message has been sent ->SMS Selesai dikirim");
}