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GSM : GSMVoiceCall class

## voiceCall()

#### Description

Places a voice call to a specified number. The methods returns different information depending on the GSM connection mode (synchronous or asynchronous). See below for details.

#### Syntax

voice.voiceCall(number)

#### Parameters

- number : char array. The number to call.

#### Returns

int
In asynchronous mode, voiceCall() 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 placed, 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;
String remoteNumber = ""; // the number you will call
char charbuffer[20];
void setup()
{
// initialize serial communications
Serial.begin(9600);
Serial.println("Make 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);
}
}
Serial.println("GSM initialized.");
Serial.println("Enter phone number to call.");
}
void loop()
{
// add any incoming characters to the String:
while (Serial.available() > 0)
{
char inChar = Serial.read();
// if it's a newline, that means you should make the call:
if (inChar == '\n')
{
// make sure the phone number is not too long:
if (remoteNumber.length() < 20)
{
// let the user know you're calling:
Serial.print("Calling to : ");
Serial.println(remoteNumber);
Serial.println();
// Call the remote number
remoteNumber.toCharArray(charbuffer, 20);
// Check if the receiving end has picked up the call
if(vcs.voiceCall(charbuffer))
{
Serial.println("Call Established. Enter line to end");
// Wait for some input from the line
while(Serial.read() !='\n' && (vcs.getvoiceCallStatus()==TALKING));
// And hang up
vcs.hangCall();
}
Serial.println("Call Finished");
remoteNumber="";
Serial.println("Enter phone number to call.");
}
else
{
Serial.println("That's too long for a phone number. I'm forgetting it");
remoteNumber = "";
}
}
else
{
// add the latest character to the message to send:
if(inChar!='\r')
remoteNumber += inChar;
}
}
}
[Get Code]

#### See Also

- getVoiceCallStatus()
- ready()
- voiceCall()
- answerCall()
- hangCall()
- retrieveCallingNumber()

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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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