for (int i = 0; i < to_convert.length() / 2; i++) {
int str_index = i * 2;
abyte first_byte = char_to_hex(to_convert.get(str_index));
for (int i = 0; i < to_convert.length() / 2; i++) {
int str_index = i * 2;
abyte first_byte = char_to_hex(to_convert.get(str_index));