wcl |
The record contains Apple Find My Bluetooth LE advertisement
data.
Inheritance HierarchyNamespace: wclBluetooth
Assembly: wclBluetoothFramework (in wclBluetoothFramework.dll) Version: 7.19.35.0 (7.19.35.0)
SyntaxThe wclBluetoothLeAppleFindMyFrameData type exposes the following members.
Methods| Name | Description | |
|---|---|---|
 | Equals | Indicates whether this instance and a specified object are equal. (Inherited from ValueType) |
| GetHashCode | Returns the hash code for this instance. (Inherited from ValueType) |
| GetType | Gets the Type of the current instance. (Inherited from Object) |
| ToString | Returns the fully qualified type name of this instance. (Inherited from ValueType) |
Fields| Name | Description | |
|---|---|---|
 | Hint | Byte 5 of BT_ADDR of the primary key. |
| Key | Public key. |
| KeyBits | Public key bits: 0x00 - bits 6 and 7 not set in public key 0x01 - bit 6 set in public key 0x02 - bit 7 set in public key 0x03 - bits 6 and 7 set in public key |
| Status | Find My status: 0x00 - Owner did not connect within key rotation period (15 min.) 0x24 - Owner connected with key roation period, Battery Full 0x64 - Owner connected with key roation period, Battery Medium 0xA4 - Owner connected with key roation period, Battery Low 0xE4 - Owner connected with key roation period, Battery Critically Low |
Remarks The Find My message is broadcast by apple devices that are
marked as lost by the user or that do not have internet connectivity.
This message includes the x-coordinate of the currently active elliptic
curve public key for the disconnected device. Because BLE advertisements
are limited to 31 total bytes, some of which are used to encode the
company identifier and other metadata, Apple encodes part of the key in
the BLE Advertising Address, with the remaining public key included in
the advertisement payload. When a nearby internet-connected apple device
sees this BLE message, it sends a location report using its own GPS to
Apple Servers. This location report is encrypted with the advertised
public key so that only the device owner can decrypt the location
report. The owner of the lost device will then see the lost device's
location appear on their Find My app.
See Also