hay all ;
iam using leonardo board +Gsm shield sim900 + MT8870 decoder board to control some motors
but i can't enable DTMF detection on GSM shield in my code ..
my my project is calling GSM shild sim number then it answer automatically so i send no to GSM that come out to DTMF throw phone port
when i use head phone to hear sound come from it i here tone but all no is the same tone .. GSm can't detect DTMF tone
i found this code recently but i can't understand it !!
#include "SIM900.h"
#include <SoftwareSerial.h>
//We don't need the http functions. So we can disable the next line.
//#include "inetGSM.h"
#include "sms.h"
#include "call.h"
//To change pins for Software Serial, use the two lines in GSM.cpp.
//GSM Shield for Arduino
//www.open-electronics.org
//this code is based on the example of Arduino Labs.
//Simple sketch to detect DTMF tones during a call
//We have to create the classes for calls.
CallGSM call;
char number[20];
byte stat=0;
int value=0;
int pin=1;
char value_str[5];
char DTMF_char='_';
int count=0;
void setup()
{
pinMode(pin,INPUT);
//Serial connection.
Serial.begin(9600);
Serial.println("GSM Shield testing.");
//Start configuration of shield with baudrate.
//For http uses is raccomanded to use 4800 or slower.
if (gsm.begin(9600))
Serial.println("\nstatus=READY");
else Serial.println("\nstatus=IDLE");
//Enable DTMF detection for SIM900
call.SetDTMF(1);
};
void loop()
{
//Chekcs status of call
stat=call.CallStatus();
//If the incoming call is from an authorized number
//saved on SIM in the positions range from 1 to 3.
if(stat==CALL_INCOM_VOICE)
{
Serial.println("Pick Up");
delay(50);
call.PickUp();
}
while(stat==CALL_ACTIVE_VOICE){
for (int k=0; k<100; k++)
{
DTMF_char=call.DetDTMF();
if(DTMF_char!='-')
Serial.println(DTMF_char);
}
stat=call.CallStatus();
}
delay(1000);
};
