at_command_modem

#define RXD2 17
#define TXD2 16
#define RST 4
unsigned long cur_time, old_time;
#define TINY_GSM_MODEM_SIM7600
#include <TinyGsmClient.h>
#define SerialMon Serial
#define TINY_GSM_DEBUG SerialMon
#define SerialAT Serial2


#ifdef DUMP_AT_COMMANDS
#include <StreamDebugger.h>
StreamDebugger debugger(SerialAT, SerialMon);
TinyGsm modem(debugger);
#else
TinyGsm modem(SerialAT);
#endif

bool hold = 0;

void setup() {
  // put your setup code here, to run once:
  SerialMon.begin(115200);
  SerialAT.begin(9600, SERIAL_8N1, RXD2, TXD2);
  delay(1000);
  Serial.println("test at mulai");
  pinMode(RST, OUTPUT);
  //pinMode(PKEY, OUTPUT);
  //digitalWrite(PKEY, LOW);
  digitalWrite(RST, LOW); delay(1000);
  digitalWrite(RST, HIGH); delay(1000);
  wRespon(10000);

  //change_baud();



}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println("SEND AT");
  /*SerialAT.println("ATI");
    wRespon(1500);

  */
  send_at("AT");
  send_at("ATI");
  send_at("AT+IPR?");

  send_at("AT+CFUN?");
  send_at("AT+CPIN?");
  send_at("AT+CSMINS?");
  send_at("AT+COPS?");
  send_at("AT+CSQ");
  send_at("AT+CREG?");
  send_at("AT+CGREG?");
}

void send_at(char *_command) {
  SerialAT.println(_command);
  wRespon(1000);
}

void wRespon(long waktu) {
  cur_time = millis();
  old_time = cur_time;
  while (cur_time - old_time < waktu ) {
    cur_time = millis();
    while (SerialAT.available() > 0) {
      Serial.print(SerialAT.readString());
    }
  }
}

void change_baud(){
  SerialAT.println("AT");
  wRespon(1000);
  SerialAT.println("AT+IPR?");
  wRespon(1000);
  SerialAT.println("AT+IPR=9600");
  wRespon(1000);
  SerialAT.println("AT&W");
  wRespon(1000);
  SerialAT.begin(9600, SERIAL_8N1, RXD2, TXD2);
  while (1) {
    SerialAT.println("AT");
    wRespon(1000);
    SerialAT.println("ATI");
    wRespon(1000);
    SerialAT.println("AT+IPR?");
    wRespon(1000);
  }
}
/*
  */