Not Receving bytes are missing

```
Hi Friends

Using this API am communicating with one Embedded device, here my problem is 
whenever
i'll send 20 bytes of data that device send it back 20 bytes sometimes am 
receiving properly but some time it is not coming please provide any solution 
for this
```

Original issue reported on code.google.com by `vmpid...@gmail.com` on 17 Oct 2012 at 5:07
