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GSM : GSMVoiceCall class
answerCall()
Description
Accepts an incoming voice call. The method returns are different depending on the modem mode (asynchronous or synchronous), see below for details.
Syntax
voice.answerCall()
Parameters
none
Returns
int
In asynchronous mode, answerCall() returns 0 if last command is still executing, 1 if successful, and >1 in case of an error. In synchronous mode, it returns 1 if the call is answered, 0 if not.
Example
#include <GSM.h>
// PIN Number
#define PINNUMBER ""
// initialize the library instance
GSM gsmAccess; // include a 'true' parameter for debug enabled
GSMVoiceCall vcs;
char numtel[20]; // buffer for the incoming call
void setup()
{
// initialize serial communications
Serial.begin(9600);
Serial.println("Receive Voice Call");
// connection state
boolean notConnected = true;
// Start GSM shield
// If your SIM has PIN, pass it as a parameter of begin() in quotes
while(notConnected)
{
if(gsmAccess.begin(PINNUMBER)==GSM_READY)
notConnected = false;
else
{
Serial.println("Not connected");
delay(1000);
}
}
// This makes sure the modem notifies correctly incoming events
vcs.hangCall();
Serial.println("Waiting Call");
}
void loop()
{
// Check the status of the voice call
switch (vcs.getvoiceCallStatus())
{
case IDLE_CALL: // Nothing is happening
break;
case CALLING: // This should never happen, as we are not placing a call
Serial.println("CALLING");
break;
case RECEIVINGCALL: // Yes! Someone is calling us
Serial.println("RECEIVING CALL");
// Retrieve the calling number
vcs.retrieveCallingNumber(numtel, 20);
// Print the calling number
Serial.print("Number:");
Serial.println(numtel);
// Answer the call, establish the call
vcs.answerCall();
break;
case TALKING: // In this case the call would be established
Serial.println("TALKING. Enter line to interrupt.");
while(Serial.read()!='\n')
delay(100);
vcs.hangCall();
Serial.println("HANG. Waiting Call.");
break;
}
delay(1000);
}
// PIN Number
#define PINNUMBER ""
// initialize the library instance
GSM gsmAccess; // include a 'true' parameter for debug enabled
GSMVoiceCall vcs;
char numtel[20]; // buffer for the incoming call
void setup()
{
// initialize serial communications
Serial.begin(9600);
Serial.println("Receive Voice Call");
// connection state
boolean notConnected = true;
// Start GSM shield
// If your SIM has PIN, pass it as a parameter of begin() in quotes
while(notConnected)
{
if(gsmAccess.begin(PINNUMBER)==GSM_READY)
notConnected = false;
else
{
Serial.println("Not connected");
delay(1000);
}
}
// This makes sure the modem notifies correctly incoming events
vcs.hangCall();
Serial.println("Waiting Call");
}
void loop()
{
// Check the status of the voice call
switch (vcs.getvoiceCallStatus())
{
case IDLE_CALL: // Nothing is happening
break;
case CALLING: // This should never happen, as we are not placing a call
Serial.println("CALLING");
break;
case RECEIVINGCALL: // Yes! Someone is calling us
Serial.println("RECEIVING CALL");
// Retrieve the calling number
vcs.retrieveCallingNumber(numtel, 20);
// Print the calling number
Serial.print("Number:");
Serial.println(numtel);
// Answer the call, establish the call
vcs.answerCall();
break;
case TALKING: // In this case the call would be established
Serial.println("TALKING. Enter line to interrupt.");
while(Serial.read()!='\n')
delay(100);
vcs.hangCall();
Serial.println("HANG. Waiting Call.");
break;
}
delay(1000);
}
See Also
Corrections, suggestions, and new documentation should be posted to the Forum.
The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.
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