Bluetooth LE Integration with Digispark

#include <SoftSerial.h>
#include <IRremote.h>
#include <IRremoteInt.h>

SoftSerial btDeskLight(2, 3); //Rx/Tx
char cmd[32] = {0};

IRsend irsend;

// accept hex in ascii without '0x' and converts to int
int atohex(char *s)
{
  int val = 0;
  while((NULL != s) && ('\0' != *s)){
    if (*s >= '0' && *s <= '9') {
      val *= 16; val += *s - '0';      
    } else if (*s >= 'a' && *s <= 'f') {
      val *= 16; val += (*s - 'a') + 10;
    } else if (*s >= 'A' && *s <= 'F') {
      val *= 16; val += (*s - 'A') + 10;
    } else {
      val = 0; break;
    }
    s++;
  }
  return val;
}

void setup() {
  btDeskLight.begin(9600);
  btDeskLight.write("AT+DEFAULT\r\n");
  btDeskLight.write("AT+RESET\r\n");
  delay(1000);
  btDeskLight.write("AT+NAME=DeskLight\r\n");
  btDeskLight.write("AT+Role0\r\n");  //Slave
  btDeskLight.write("AT+TYPE1");      //Simple Pairing
}

void loop() {
  static int iter = 0;

  if (btDeskLight.available())
  {
    cmd[iter] = btDeskLight.read();

    //if CRLF (CC41A)
    if((cmd[iter] == 10) && (cmd[iter-1]==13)){
      cmd[iter-1] = '\0'; iter = 0;
      irsend.sendNEC(atohex(cmd), 32);
      
      //echo to controller
      btDeskLight.write(cmd); btDeskLight.write("\n");
    } else {
      iter++; iter %= 32;
    }
  }
}