Usage Example for Arduino-Send SMS

Hardware Preparation

• DFRduino UNO R3 + Gravity IO Expansion Shield (or similar) x 1
• Gravity: UART A6 GSM & GPRS Module x1
• Gravity 4Pin cable

Software Preparation

• Arduino IDE, Click to Download Arduino IDE from Arduino®

Connection Diagram

• TX-Pin10, RX-Pin11

Sample Code

#include <SoftwareSerial.h>
SoftwareSerial mySerial(11, 10);  // TX-Pin11, RX-Pin10
void updateSerial()
{
  delay(2000);
  while (Serial.available()) {
    mySerial.write(Serial.read());//Data received by Serial will be outputted by mySerial }
  while(mySerial.available()) {
    Serial.write(mySerial.read());//Data received by mySerial will be outputted by Serial }

}

void setup()
{
  Serial.begin(9600);
  mySerial.begin(9600);
}

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

  updateSerial();
  mySerial.println("AT+CMGF=1");   // Configuring mode is TEST, only English texts are available
  updateSerial();
  mySerial.println("AT+CMGS=\"xxxxxxxxxxx\"");//xxxxxxxxxxx is the phone number
  updateSerial();
  mySerial.print("Hello, this is a test"); //text content
  updateSerial();
  mySerial.write(26);
  while(1)
  {
    if(mySerial.available())
    {
      Serial.write(mySerial.read());//Data received by mySerial will be outputted by Serial }
    if(Serial.available())
    {
      mySerial.write(Serial.read());//Data received by Serial will be outputted by mySerial }
  }
}

Running Results