File transfer over BLE

[tannewt]

Should feel like USB MSC but wireless including auto-reload

[ladyada]

just a note, there doesnt seem to be a standard file transfer protocol - we'd have to hand-implement. not too hard but will need implementing per-platform
https://www.bluetooth.com/specifications/gatt

[arturo182]

There is however a Object Transfer Service that could potentially be used for this https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.service.object_transfer.xml

And the Nordic SDK has experimental support for it: http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/group__nrf__ble__ots__c.html?cp=4_0_0_6_3_35

It mentions Apple Notification Center Service (ANCS) but it seems to be a copy-paste error.

[tannewt]

@ladyada I realize that. Its just too handy to not have.

@arturo182 Thanks for the link. That looks promising.

[arturo182]

I can have a look at this at some point, I think we should look into incorporating some parts of Nordic's BLE SDK as that would ease development and reduce the number of bugs we introduce when writing everything from scratch.

[ladyada]

i totally think we should have it, just wanted to make a note that it wouldnt be as elegant as it ought to be if the BT consortium had come up with a profile :D

[dhalbert]

I did some more looking at Bluetooth File transfer. There are some pre-existing specs for classic Bluetooth. There's OBEX, a general object exchange protocol which is used for IrDA, Bluetooth, USB, and other protocols. GOEP (Generalized Object Exchange Protocol) is a Bluetooth profile based on on OBEX. There's a File Transfer Profile (FTP).

https://en.wikipedia.org/wiki/OBject_EXchange
https://en.wikipedia.org/wiki/OBject_EXchange#Protocols
https://en.wikipedia.org/wiki/List_of_Bluetooth_profiles#File_Transfer_Profile_(FTP)

[ladyada]

@hathach do you have any thoughts on which one of these would be most universal or best to implement?

[ladyada]

https://www.howtogeek.com/208365/how-to-use-bluetooth-file-transfer-between-os-x-and-android-5.0-devices/

[hathach]

So far I didn't know/work with a way to transfer file via ble yet. Haven't got any request for this in Arduino