site_archiver@lists.apple.com Delivered-To: bluetooth-dev@lists.apple.com Hi Matthias, It’s our intention for developers to have same access to GATT services over BDR/EDR. Could you help file a feedback report and sysdiagnose (with logging profile) so we can understand how you’re using the APIs? Thank you! Duy

On Apr 11, 2023, at 7:22 AM, Matthias Ringwald via Bluetooth-dev <bluetooth-dev@lists.apple.com> wrote:

Hi there

Is it possible to access iOS GATT Services, e.g. the Battery Service, via GATT over an existing BR/EDR Connection?

As current iOS and macOS announce GATT over BR/EDR via an SDP record, I've tried to connect to it via the announced PSM 0x1f, but I get an L2CAP Connection refused – no resources available' (0x04)'. I've tried both as Central without other profiles being connected, as well as Peripheral, after iOS connected to our HFP HF profile?

Why? A customer of our stack wants to build some kind of HFP HF device and has asked us if they can get a better battery status than the 5 levels from HFP. As iOS provides it's battery level, it's possible to create an additional LE connection to read the battery status, but it's would be way more elegant, and requires less logic, to access the battery service via the existing BR/EDR connection.

Thanks Matthias

— Dr. sc. Matthias Ringwald CTO and Co-founder of BlueKitchen GmbH, Zurich https://bluekitchen-gmbh.com <https://bluekitchen-gmbh.com/>

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