for(i; i < (len-2); i++){
    if(pkt[i] == 0){
      if(pola){
        strcpy(&outstr[o], ": ");
        o+=2;
      } else {
       strcpy(&outstr[o], "\r\n    ");
        o = o+=6;
      }
      pola = !pola;
    } else {
      outstr[o++] = pkt[i];
    }
  }