response_get_string
keylen = response_get_string(&dev->parsed, 4, &activekey);
strlen = response_get_string(&dev->parsed, 4, &msid_pin);
dev->prev_d_len = response_get_string(&dev->parsed, 1, &data_read);
lr_uid_len = response_get_string(&dev->parsed, tok_n, &lr_uid);
lr_uid_len = response_get_string(&dev->parsed, tok_n, &lr_uid);