Bulk data transfer Bluetooth

[william.ely]

I've looked at how other projects handle sending large amounts of data and they all use a derivative of the TX/RX scheme that is used in the image transfer demo. The Peripheral waits for a command on the RX characteristic and the notifies the Central on the TX characteristic. It seems like this is a wheel that every company needs to reinvent to add bulk data transfer to their design. Object Transfer Service (OTS ) seems to be a SIG compliant solution to this problem. Does OTS need to be implemented in the phone OS to work? Is the cost/benefit of using OTS not worth it? Is there a better solution than OTS? Am I missing something?

[Edvin]

Hello,

I see that there is an OTS example in SDK15.

SDK\examples\ble_peripheral\experimental\ble_app_ots

SDK\examples\ble_central\experipmental\ble_app_ots_c

The example is also described here.

 

I haven't studied how the OTS service works in detail (you can find it here). However, I see that the OTS service in the SDK does not follow the spec yet (see here).

I believe you would need an app to use OTS on a phone, although I haven't tried it. As mentioned, our OTS implementation is not following the spec yet. I wasn't able to connect to it with anything else than the central OTS example.

However, I would agree that it is unnecessary that everyone has to reinvent the wheel. I will talk to someone who has worked with the OTS example, and check what the plan for this is.

 

Best regards,

Edvin