A9G Low Power GSM/GPRS+GPS Module (Seeduino arch pro )
Code Arduino :
#include<stdio.h>
#include<string.h>
#define DEBUG true
int PWR_KEY=9;
int RST_KEY=6;
int LOW_PWR_KEY=5;
int LED_R = 2; //D2 RED
int LED_G = 3; //D3 GREEN
int LED_B = 4; //D4 BLUE
String msg = String(“”);
int SmsContentFlag = 0;
void setup()
{
pinMode(PWR_KEY, OUTPUT);
pinMode(RST_KEY, OUTPUT);
pinMode(LOW_PWR_KEY, OUTPUT);
digitalWrite(RST_KEY, LOW);
digitalWrite(LOW_PWR_KEY, HIGH);
digitalWrite(PWR_KEY, HIGH);
pinMode(LED_R, OUTPUT);
pinMode(LED_G, OUTPUT);
pinMode(LED_B, OUTPUT);
digitalWrite(LED_R, HIGH);
digitalWrite(LED_G, HIGH);
digitalWrite(LED_B, HIGH);
// String msg = String(“”);
// int SmsContentFlag = 0;
SerialUSB.begin(115200);
while (!SerialUSB) {
; // wait for Arduino serial port to connect
}
Serial1.begin(115200);
modulePowerOn();
GprsTextModeSMS();
}
void loop()
{
char SerialInByte;
if(SerialUSB.available())
{
Serial1.print((unsigned char) SerialUSB.read());
}
else if(Serial1.available())
{
//char SerialInByte;
SerialInByte = (unsigned char)Serial1.read();
if( SerialInByte == 13 )//0x0D
{
ProcessGprsMsg();
}
if( SerialInByte == 10 )
{
}
else
{
//EN: store the current character in the message string buffer
msg += String(SerialInByte);
}
}
}
void modulePowerOn()
{
int i=0;
boolean result = false;
digitalWrite(PWR_KEY, LOW);
delay(3000);
digitalWrite(PWR_KEY, HIGH);
delay(15000);
result = Serial1.find("OK");
if(result)
SerialUSB.println( "Please send sms to control your device!" );
else
{
for(i=0;i<10;i++)
{
Serial1.println("AT");
delay(500);
result = Serial1.find("OK");
if(result)
{
SerialUSB.println( "Please send sms to control your device!" );
return;
}
}
}
}
void ProcessSms( String sms )
{
SerialUSB.print( “ProcessSms for [” );
SerialUSB.print( sms );
SerialUSB.println( “]” );
if( sms.indexOf(“onr”) >= 0)
{
digitalWrite(LED_R, LOW);
SerialUSB.println( “LED Red ON” );
//return;
}
if( sms.indexOf(“ong”) >= 0)
{
digitalWrite( LED_G, LOW);
SerialUSB.println( “LED Green ON”);
//return;
}
if( sms.indexOf(“onb”) >= 0 )
{
digitalWrite(LED_B, LOW);
SerialUSB.println( “LED Blue ON” );
//return;
}
if( sms.indexOf(“offr”) >= 0 )
{
digitalWrite(LED_R,HIGH);
SerialUSB.println( “LED Red OFF” );
//return;
}
if(sms.indexOf(“offg”) >= 0 )
{
digitalWrite(LED_G, HIGH );
SerialUSB.println( “LED Green OFF” );
//return;
}
if( sms.indexOf(“offb”) >= 0 )
{
digitalWrite(LED_B, HIGH );
SerialUSB.println( “LED Blue OFF” );
//return;
}
}
// EN: Request Text Mode for SMS messaging
void GprsTextModeSMS()
{
Serial1.println( “AT+CMGF=1” );
}
void GprsReadSmsStore( String SmsStorePos )
{
// Serial.print( "GprsReadSmsStore for storePos " );
// Serial.println( SmsStorePos );
Serial1.print( “AT+CMGR=” );
Serial1.println( SmsStorePos );
}
// EN: Clear the GPRS shield message buffer
void ClearGprsMsg()
{
msg = “”;
}
// EN: interpret the GPRS shield message and act appropiately
void ProcessGprsMsg()
{
SerialUSB.println(“”);
// Serial.print( “GPRS Message: [” );
SerialUSB.print( msg );
// Serial.println( “]” );
if( msg.indexOf( “Call Ready” ) >= 0 )
{
SerialUSB.println( “*** GPRS Shield registered on Mobile Network ***” );
GprsTextModeSMS();
}
//EN: unsolicited message received when getting a SMS message
if( msg.indexOf( "+CIEV" ) >= 0 )
{
SerialUSB.println( "*** SMS Received ***" );
}
//EN: SMS store readed through UART (result of GprsReadSmsStore request)
if( msg.indexOf( "+CMT:" ) >= 0 )
{
// EN: Next message will contains the BODY of SMS
SmsContentFlag = 1;
// EN: Following lines are essentiel to not clear the flag!
ClearGprsMsg();
return;
}
// EN: +CMGR message just before indicate that the following GRPS Shield message
// (this message) will contains the SMS body
if( SmsContentFlag == 1 )
{
SerialUSB.println( "*** SMS MESSAGE CONTENT ***" );
SerialUSB.println( msg );
SerialUSB.println( "*** END OF SMS MESSAGE ***" );
ProcessSms( msg );
}
ClearGprsMsg();
//EN: Always clear the flag
SmsContentFlag = 0;
}
