Gadgetbridge will support "gadget initiated connections" - does Bangle.js do this?

[thyttan]

ble: support gadget initiated connections #4849 went in Gadgetbridge master branch a couple of weeks ago.

I asked:

I wondered if you could help me understand the "Connect on connection from device" setting? Should I expect the Bangle.js 2 to support it?
If you have a link so I can read for myself that would be very nice :)

And got answer:

https://developer.android.com/reference/android/bluetooth/BluetoothDevice#ACTION_ACL_CONNECTED
Most paired devices support it. So yes, I recommend to enable it by default. Otherwise there might be constellations where the gadget and Android think BT is connected but GB is still trying to connect.

Do we know if Bangle.js does this today? If not, could it be made to?

[gfwilliams]

I don't really understand what's going on I'm afraid. There's no way the Bangle can initiate a peripheral connection to the phone - the phone literally has to send a radio signal out to the Bangle - the Bangle can't request to be connected apart from by turning on advertising (which it does when not connected anyway).

But maybe they're saying that if Android connects automatically (rather than Gadgetbridge requesting it) then before Gadgetbridge wouldn't respond to it, and now it does?

I don't see there's anything I can do on the Bangle.js side though

[thyttan]

I found this in the logcat:

system/bta/dm/bta_dm_act.cc:810 bta_dm_acl_up: Acl connected peer:xx:xx:xx:xx:AA:AA transport:BT_TRANSPORT_LE handle:10
Connection action: android.bluetooth.device.action.ACL_CONNECTED, device XX:XX:XX:XX:AA:AA
onAclChange: state=CONNECTED, mac=XX:XX:XX:XX:AA:AA [CONTEXT service_id=265 ]

So it seems it works like this already.

[gfwilliams]

Thanks for checking - that's good to know!