I'm working on a project where I want to make my own mobile phone with a LILYGO TTGO T-CALL ESP32 and I would like to read all phonebook entries from sim card. I already figured out how to get all entries with an AT command but my code does not work properly, it can read about 5 entries but after the 6th or so it stops working. Here is the code I use for this:
void ReadSimCard() {
WriteText("Read SIM . . .");
CMD("AT+CPBS=\"SM\"");
delay(3000);
while (!hwSerial.available()) {
delay(10);
}
while (hwSerial.available()) {
hwSerial.read();
}
CMD("AT+CPBF");
delay(10000);
while (!hwSerial.available()) {
delay(10);
}
while (hwSerial.available()) {
delay(1000);
String s = hwSerial.readStringUntil('\n');
Serial.println("READSIM: " + s);
if (s.indexOf("CPBF:") > 0) {
Serial.println();
AddToContactList(s);
}
WriteText("Read SIM . . .", String(NUMBER_AMOUNT));
}
if (NUMBER_AMOUNT < 30) {
WriteText("Bad read");
delay(3000);
NUMBER_AMOUNT = 0;
for (int i = 0; i < 250; i++) {
names[i] = "";
}
for (int i = 0; i < 250; i++) {
numbers[i] = "";
}
ReadSimCard();
}
}
void CMD(String c) {
hwSerial.print(c + "\r\n");
delay(500);
}
void AddToContactList(String s) { // +CPBF: 1,"+36201234567",145,"NOTME"
int i1 = 0;
int i2 = 0;
int i3 = 0;
String data1 = "";
String data2 = "";
String data3 = "";
i1 = s.indexOf(',');
i2 = s.indexOf(',', i1 + 1);
i3 = s.indexOf(',', i2 + 1);
data1 = s.substring(0, i1);
data1.remove(0, 7);
data2 = s.substring(i1 + 2, i2 - 1);
data3 = s.substring(i3 + 2);
data3.remove(data3.lastIndexOf('"'));
Serial.println("READSIM L1: " + data1);
Serial.println("READSIM L2: " + data2);
Serial.println("READSIM L3: " + data3);
Serial.println();
numbers[NUMBER_AMOUNT] = data2;
names[NUMBER_AMOUNT] = data3;
NUMBER_AMOUNT++;
}
The numbers and names String arrays can contain the maximum amount of elements the sim card can store (the arrays' sizes are 250 each). The WriteText() function shows text on a 1602 LCD display. The NUMBER_AMOUNT contains the number of occupied spaces in the numbers and names arrays.
const byte maxKontak = 30;
//String temp_id[maxKontak], temp_name[maxKontak], temp_number[maxKontak];
int temp_id;
String temp_name, temp_number;
struct Contact{ String Name[maxKontak], Number[maxKontak]; int Type[maxKontak], Id[maxKontak], Count; };
Contact kontak; // Objek Struct variable
HardwareSerial SerialModem(1);
#define RXD2 27 //16 // GPIO27. merupakan UART2 RXD hardware serial ESP32, jd g perlu library <SoftwareSerial.h>
#define TXD2 26 //17
void setup() {
Serial.begin(115200);
SerialModem.begin(9600, SERIAL_8N1, RXD2, TXD2);
// put your setup code here, to run once:
_getSimCard(kontak); // baca semua kontak yang ada pada simcard menggunakan perintah AT+CPBF dan simpan ke global variable struct
Serial.println("Menampilkan kontak dari Global Variable Struct:");
for (int i = 0; i < maxKontak; i++) {
//Serial.println("no. "+String(i+1)+" -> "+String(kontak.Number[i]));
Serial.println("no. "+String(i+1)+" -> Id: "+String(kontak.Id[i])+", Nama: "+kontak.Name[i]+", Nomor Kontak: "+kontak.Number[i]);
delay(10);
}
Serial.println("Done");
}
void loop() {
// put your main code here, to run repeatedly:
}
//
void _getSimCard(Contact &c) {
Serial.println("\nRead SIM...");
SerialModem.println("AT+CPBF"); // menggunakan perintah AT command find
const int TIMEOUT_AT = 3000;
long int Start = millis();
byte hitung = 0; // indeks mulai dari 0
while((millis() - Start) < TIMEOUT_AT){
while (SerialModem.available()) {
//String response = SerialModem.readString(); // jika menggunakan baris perintah yang tampil hanya index pertama saja
String response = SerialModem.readStringUntil('\n'); // baca tiap baris
//Serial.println(response); // hasilnya semua yang ada pada simcard ditampilkan
if (response.indexOf("CPBF:") > 0) {
//Serial.println(response); // hasilnya tiap baris ditampilkan -> +CPBF: 30,"09786483783",129,"namman"
_addToContactList(response);
c.Id[hitung] = temp_id; // simpan hasil ekstrak dari global variable sementara ke global variable struct (array)
c.Name[hitung] = temp_name;
c.Number[hitung] = temp_number;
//Serial.println("no. "+String(hitung+1)+" -> Nama: "+c.Name[hitung]+", Nomor Kontak: "+c.Number[hitung]); // menampilkan hasil ekstak ke serial
hitung++; // penambahan 1 sampai dengan kontak terakhir yang ada pada simcard
delay(10);
}
}
}
Serial.println("Done\n");
}
/*======================================================================================================================================================================*/
// penjelasan tentang manipulasi string http://bf-arduinolab.wikidot.com/docs:string-manipulation
void _addToContactList(String s) { // s = variable penampung dari hasil pembacaan serial modem (SerialModem.readStringUntil('\n')
// +CPBF: 1,"083895555359",129,"dkurnia"
int i1 = s.indexOf(','); // posisi substring setelah koma pertama, -> "083895555359",129,"dkurnia"
int i2 = s.indexOf(',', i1 + 1); // posisi substring setelah koma kedua -> "dkurnia"
int i3 = s.indexOf(',', i2 + 1); // posisi substring setelah koma ketiga, -> dkurnia"
String id = s.substring(0, i1); // ambil substring dari posisi index awal(+) sampai posisi index i1(1) hasilnya +CPBF: 1
id.remove(0, 7); // kemudian hapus posisi 0 sampai 7 -> +CPBF: 1 hasilnya 1
//Serial.println(id); // debug serial
temp_id = id.toInt(); // simpan hasil ekstrak ke global variable sementara
temp_number = s.substring(i1 + 2, i2 - 1);//.c_str(); // ambil substring dari posisi index (angka 0) sampai posisi index i1(9) -> 083895555359",129,"dkurnia" hsilnya 083895555359
temp_name = s.substring(i3 + 2); // ambil substring dari posisi index, -> dkurnia"
temp_name.remove(temp_name.lastIndexOf('"')); // kemudian hapus tanda kutip terakhir -> hasilnya dkurnia
//return data2;
}
I tried it with a code like this and it worked