This script enables Linux devices to send out Bluetooth Low Energy advertisements such that they can be found by Apple's Find My network.
Note that the script is just a proof-of-concept and currently only implements advertising a single static key. This means that devices running this script are trackable by other devices in proximity.
The script requires a Linux machine with a Bluetooth Low Energy radio chip, a Python environment, and hcitool installed. We tested it on a Raspberry Pi running the official Raspberry Pi OS.
Our Python script uses HCI calls to configure Bluetooth advertising. You can copy the required ADVERTISMENT_KEY from the app by right-clicking on your accessory and selecting Copy advertisement key (Base64). Then run the script:
sudo python3 HCI.py --key <ADVERTISMENT_KEY>