pub const BLE_LINK: u32 = 4873;Expand description
How far the Bluetooth transport has got with whoever is on the
other end of it (PROP_BLE_LINK) — UINT8, read-only, one of
crate::ble::BleLinkState. Requires CAP_BLE.
Live transport state, so it is not part of the saved snapshot and
a protocol reset does not touch it. Read over Bluetooth it always
answers BLE_LINK_ATTACHED, because the session asking is the
session it is reporting; it earns its keep over the mesh and over
a cable, where it is the only way to ask whether a phone is on the
device right now.