void setup() {
  // Start communication with the GSM module
  Serial.begin(9600);
  delay(1000);


}

void loop() {

  // Configure GSM module
  Serial.println("AT"); // Test the communication
  delay(1000);
  Serial.println("AT+CMGF=1"); // Set SMS mode to text
  delay(1000);
  
  Serial.println("AT+CMGS=\"+1234567890\""); // Replace with the target phone number
  delay(1000);
  Serial.print("  "); // Message content
  delay(1000);
  Serial.write((char)26); // ASCII code for CTRL+Z to send the SMS
  
}