MacOS 15 Sequoia Bluetooth Latency 0

[xudongzheng]

MacOS 15 Sequoia is negotiating a Bluetooth connection latency of 0 instead of the usual 30. The primary impact is battery life.

This happens because ZMK defaults to CONFIG_BT_PERIPHERAL_PREF_MIN_INT=6. When macOS 15 receives such a request, it appears to ignore the latency value.

This can be fixed by setting CONFIG_BT_PERIPHERAL_PREF_MIN_INT=12. However this increases the Bluetooth interval for all devices across the board, which is not ideal.