[Q] bluetooth error while sending

Hey!

I´m developing an application for backing up different kinds of information stored in a smartphone.
Therefore I need to send the data from my device to another hardware, I want to realize it via Bluetooth but.
I use a bluetooth - module called "JY-MCU" for the external hardware I send the data to.

So faar so good, the only problem I have is the bluetooth connection which breaks up while sending the data.

E/bt-btif ( 905): unknown send() error, sent:-1, p_buf->len:93, errno:32

That's the LogCat entry I got.

I googled the errors but was not able to find any answer...I hope you guys can help me interpreting this error.

Thanks
markus