It is about downloading text stream from selected/closest Bluetooth devices and POST the stream to website over HTTP POST connection. There could be a minor issue if both USB and TCP connection work together. On connecting to bluetooth, current Connection Manager (Wifi, GSM Modem, etc) would be dropped, and switched to BT link. So, we should manage the Connection Manager as well. So, downloaded stream would be stored on local file storage and then reconnecting the Connection Manager to Wifi or GSM Modem for establishing TCP/IP Link for HTTP/POST connection purpose.
I prefer to use C# for this purpose.