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Receiving an SMS then sending another one back ... GPS/GPRS/GSM_Module_V3.0

userHead MMAB 2014-08-08 13:05:45 4669 Views4 Replies
Like the title show,

what i am trying to do is send an SMS from my mobile phone to the robot.. then i want it to send a reply message to my phone..

Is there a way to switch between the commands.

I am using Arduino Mega, i can send SMS and receive SMS to control the board actions, but i cant do them both at the same time......


Thanks :D

This is the code i tried

Code: Select all
 
byte gsmDriverPin[3] = {
  3,4,5};
char inchar;

void set_GSM(){
  //Init the driver pins for GSM function
  for(int i = 0 ; i < 3; i++){
    pinMode(gsmDriverPin[i],OUTPUT);
  }
  digitalWrite(5,HIGH);//Output GSM Timing 
  delay(1500);
  digitalWrite(5,LOW);  
  digitalWrite(3,LOW);//Enable the GSM mode
  digitalWrite(4,HIGH);//Disable the GPS mode
  delay(2000);
  Serial.begin(9600); //set the baud rate
  delay(5000);//call ready
  delay(5000);
  delay(5000); 
}

//SMS
void set_Message(){
  Serial.println("AT"); //Send AT command  
  delay(2000);
  Serial.println("AT");   
  delay(2000);
  //Send message
  Serial.println("AT+CMGF=1");
  delay(1000);
  Serial.println("AT+CMGS=\"744XXXX\"");
  delay(1000);
}

void smsUser(){
 Serial.print("Hi there");//THE SOFTWARE SMS
 delay(1000);
 Serial.write(26);
}
void setup()
{    
  //Init the driver pins for GSM function
  for(int i = 0 ; i < 3; i++){
    pinMode(gsmDriverPin[i],OUTPUT);
  }
  pinMode(ledpin,OUTPUT);
  Serial.begin(9600);                                      //set the baud rate
  digitalWrite(5,HIGH);                                     //Output GSM Timing 
  delay(1500);
  digitalWrite(5,LOW);  
  digitalWrite(3,LOW);                                      //Enable the GSM mode
  digitalWrite(4,HIGH);                                     //Disable the GPS mode
  delay(2000);
  delay(5000);                                              //call ready
  delay(5000);
  Serial.println("AT+CMGD=1,4");                           //Delete all SMS in box
}
 
void loop()
{  
  if(Serial.available()>0)
  {
    inchar=Serial.read();
    if(inchar=='T')
    {
      delay(10);
      inchar=Serial.read(); 
      if (inchar=='I')                                      //When the GSM module get the message, it will display the sign '+CMTI "SM", 1' in the serial port
      {      
        delay(10);
        Serial.println("AT+CMGR=1");                       //When Arduino read the sign, send the "read" AT command to the module
        delay(10);
      }
    }
    else if (inchar=='L')
    {
      delay(10);
      inchar=Serial.read(); 
      if (inchar=='H')                                     //Thw SMS("LH") was display in the Serial port, and Arduino has recognize it.
      {
        set_GSM(); 
        set_Message();
        smsUser();     
        Serial.println("AT+CMGD=1,4");                    //Delete all message
        delay(500);
      }
    }
  }
}
2015-10-23 06:47:16 Hello MMAB,

I wnat to ask you..I have a problem to get GPS location..What I am trying to do is send SMS from my mobile phone to the module v3..then I want it to send a reply message with GPS location to my mobile phone..

you have solved the problem? userHeadPic aliabulolipop123
2014-08-11 18:09:17 Uhm~ almost. It is just a data analysis.
You can define your symbol, like a string, a char or something else.
With if...else sentence to realize some function.

Hey, If you want to get the GPS location, the last sample code maybe will help you, it will send a message includes its Location in the SMS.  userHeadPic Grey.CC
2014-08-09 04:46:31 Thanks for the quick reply Grey,

but what if i want to send back the GPS location of the robot....

would i follow the same method, but just change the code within the
Code: Select all
if (inchar=='H'){.....
  to the code used to get the GPS location ?!?!?!

Thanks again! userHeadPic MMAB
2014-08-08 18:49:33 Really?

This is code which I wrote before. Although it is very low, but it could work before.
You could check it first.
Code: Select all
byte gsmDriverPin[3] = {
  3,4,5};//The default digital driver pins for the GSM and GPS mode
//If you want to change the digital driver pins
//or you have a conflict with D3~D5 on Arduino board,
//you can remove the J10~J12 jumpers to reconnect other driver pins for the module!
int ledpin = 8;
char inchar;
void setup()
{    
  //Init the driver pins for GSM function
  for(int i = 0 ; i < 3; i++){
    pinMode(gsmDriverPin[i],OUTPUT);
  }
  pinMode(ledpin,OUTPUT);
  Serial.begin(9600);                                      //set the baud rate
  digitalWrite(5,HIGH);                                     //Output GSM Timing 
  delay(1500);
  digitalWrite(5,LOW);  
  digitalWrite(3,LOW);                                      //Enable the GSM mode
  digitalWrite(4,HIGH);                                     //Disable the GPS mode
  delay(2000);
  delay(5000);                                              //call ready
  delay(5000);
  Serial.println("AT+CMGD=1,4");                           //Delete all SMS in box
}

void loop()
{  
  if(Serial.available()>0)
  {
    inchar=Serial.read();
    if(inchar=='T')
    {
      delay(10);
      inchar=Serial.read(); 
      if (inchar=='I')                                      //When the GSM module get the message, it will display the sign '+CMTI "SM", 1' in the serial port
      {      
        delay(10);
        Serial.println("AT+CMGR=1");                       //When Arduino read the sign, send the "read" AT command to the module
        delay(10);
      }
    }
    else if (inchar=='L')
    {
      delay(10);
      inchar=Serial.read(); 
      if (inchar=='H')                                     //Thw SMS("LH") was display in the Serial port, and Arduino has recognize it.
      {
        delay(10);
        digitalWrite(ledpin,HIGH);                         //Turn on led 
        delay(50);
        Serial.println("AT+CMGD=1,4");           //Delete all message
        delay(500);
        Serial.println("AT+CMGF=1");
        delay(500);
        Serial.println("AT+CMGS=\"15xxxxxxxxx\"");//Change the receiver phone number
        delay(500);
        Serial.print("I am ON");//the message you want to send
        delay(500);
        Serial.write(26);
        delay(500);
      }
      if (inchar=='L')                                    //Thw SMS("LH") was display in the Serial port, and Arduino has recognize it.
      {
        delay(10);
        digitalWrite(ledpin,LOW);                         //Turn off led 
        delay(50);
        Serial.println("AT+CMGD=1,4");                   //Delete all message
        delay(500);
        Serial.println("AT+CMGF=1");
        delay(500);
        Serial.println("AT+CMGS=\"15xxxxxxxxx\"");//Change the receiver phone number
        delay(500);
        Serial.print("I am OFF");    //the message you want to send
        delay(500);
        Serial.write(26);
        delay(500);
      }
    }
  }
}
When you send a message "H" to GSM module, it will turn on the LED, and sending back a SMS "I am ON"

Next time, maybe I can modify the code , make better. userHeadPic Grey.CC
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