Salam Programmer!!  Nama saya Nathanael Davin , Kali ini saya akan memberikan tutorial tentang voice call menggunakan arduino.

Berikut langkah – langkah yang harus di siapkan  :

1. Siapkan bahan – bahannya : Arduino UNO, GSM Module, SIM CARD.

2. Buat Rangkaian seperti ini :   keterangan :

• kabel warna merah (Arduino pin  02  —->GSM Module 5VT  )
• kabel warna putih (Arduino pin 03 ——>GSM Module  5VR )
• kabel warna hijau (Arduino GND —–>GSM Module GND )
• kabel warna hitam  (Arduino 5V ——> GSM Module  VCC5  )

3. Buka Software arduino, klik file > examples > GSM> MakeVoiceCall .

4. Setelah itu, Upload.

5. klik serial monitor seperti gambar di bawah ini

6. Tuliskan nomor telepon yang ingin anda tujukan pada serial monitor.

7. Hasilnya nomor yang dituju akan menerima panggilan seperti gambar dibawah ini :

Dibawah ini kode dari arduino :

// libraries
#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 and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}

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;
}
}
}
}